/* Target-dependent code for the HP PA architecture, for GDB.
- Copyright 1986, 87, 89, 90, 91, 92, 93, 94, 95, 96, 1999
- Free Software Foundation, Inc.
+
+ Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
University of Utah (pa-gdb-bugs@cs.utah.edu).
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "frame.h"
#include "bfd.h"
#include "inferior.h"
#include "value.h"
-
+#include "regcache.h"
+#include "completer.h"
+#include "language.h"
+#include "osabi.h"
+#include "gdb_assert.h"
+#include "infttrace.h"
/* For argument passing to the inferior */
#include "symtab.h"
#else
#endif
-/*#include <sys/user.h> After a.out.h */
+/*#include <sys/user.h> After a.out.h */
#include <sys/file.h>
#include "gdb_stat.h"
-#include "wait.h"
+#include "gdb_wait.h"
#include "gdbcore.h"
#include "gdbcmd.h"
#include "symfile.h"
#include "objfiles.h"
-/* To support asking "What CPU is this?" */
-#include <unistd.h>
+/* Some local constants. */
+static const int hppa_num_regs = 128;
/* To support detection of the pseudo-initial frame
that threads have. */
#define THREAD_INITIAL_FRAME_SYMBOL "__pthread_exit"
#define THREAD_INITIAL_FRAME_SYM_LEN sizeof(THREAD_INITIAL_FRAME_SYMBOL)
-
-static int extract_5_load PARAMS ((unsigned int));
-
-static unsigned extract_5R_store PARAMS ((unsigned int));
-
-static unsigned extract_5r_store PARAMS ((unsigned int));
-
-static void find_dummy_frame_regs PARAMS ((struct frame_info *,
- struct frame_saved_regs *));
-
-static int find_proc_framesize PARAMS ((CORE_ADDR));
-
-static int find_return_regnum PARAMS ((CORE_ADDR));
-
-struct unwind_table_entry *find_unwind_entry PARAMS ((CORE_ADDR));
-static int extract_17 PARAMS ((unsigned int));
+static int extract_5_load (unsigned int);
-static unsigned deposit_21 PARAMS ((unsigned int, unsigned int));
+static unsigned extract_5R_store (unsigned int);
-static int extract_21 PARAMS ((unsigned));
+static unsigned extract_5r_store (unsigned int);
-static unsigned deposit_14 PARAMS ((int, unsigned int));
+static void find_dummy_frame_regs (struct frame_info *,
+ struct frame_saved_regs *);
-static int extract_14 PARAMS ((unsigned));
+static int find_proc_framesize (CORE_ADDR);
-static void unwind_command PARAMS ((char *, int));
+static int find_return_regnum (CORE_ADDR);
-static int low_sign_extend PARAMS ((unsigned int, unsigned int));
+struct unwind_table_entry *find_unwind_entry (CORE_ADDR);
-static int sign_extend PARAMS ((unsigned int, unsigned int));
+static int extract_17 (unsigned int);
-static int restore_pc_queue PARAMS ((struct frame_saved_regs *));
+static unsigned deposit_21 (unsigned int, unsigned int);
-static int hppa_alignof PARAMS ((struct type *));
+static int extract_21 (unsigned);
-/* To support multi-threading and stepping. */
-int hppa_prepare_to_proceed PARAMS (());
-
-static int prologue_inst_adjust_sp PARAMS ((unsigned long));
-
-static int is_branch PARAMS ((unsigned long));
-
-static int inst_saves_gr PARAMS ((unsigned long));
+static unsigned deposit_14 (int, unsigned int);
-static int inst_saves_fr PARAMS ((unsigned long));
+static int extract_14 (unsigned);
-static int pc_in_interrupt_handler PARAMS ((CORE_ADDR));
+static void unwind_command (char *, int);
-static int pc_in_linker_stub PARAMS ((CORE_ADDR));
+static int low_sign_extend (unsigned int, unsigned int);
-static int compare_unwind_entries PARAMS ((const void *, const void *));
+static int sign_extend (unsigned int, unsigned int);
-static void read_unwind_info PARAMS ((struct objfile *));
+static int restore_pc_queue (struct frame_saved_regs *);
-static void internalize_unwinds PARAMS ((struct objfile *,
- struct unwind_table_entry *,
- asection *, unsigned int,
- unsigned int, CORE_ADDR));
-static void pa_print_registers PARAMS ((char *, int, int));
-static void pa_strcat_registers PARAMS ((char *, int, int, GDB_FILE *));
-static void pa_register_look_aside PARAMS ((char *, int, long *));
-static void pa_print_fp_reg PARAMS ((int));
-static void pa_strcat_fp_reg PARAMS ((int, GDB_FILE *, enum precision_type));
+static int hppa_alignof (struct type *);
-typedef struct {
- struct minimal_symbol * msym;
- CORE_ADDR solib_handle;
-} args_for_find_stub;
+/* To support multi-threading and stepping. */
+int hppa_prepare_to_proceed ();
+
+static int prologue_inst_adjust_sp (unsigned long);
+
+static int is_branch (unsigned long);
+
+static int inst_saves_gr (unsigned long);
+
+static int inst_saves_fr (unsigned long);
+
+static int pc_in_interrupt_handler (CORE_ADDR);
+
+static int pc_in_linker_stub (CORE_ADDR);
+
+static int compare_unwind_entries (const void *, const void *);
+
+static void read_unwind_info (struct objfile *);
+
+static void internalize_unwinds (struct objfile *,
+ struct unwind_table_entry *,
+ asection *, unsigned int,
+ unsigned int, CORE_ADDR);
+static void pa_print_registers (char *, int, int);
+static void pa_strcat_registers (char *, int, int, struct ui_file *);
+static void pa_register_look_aside (char *, int, long *);
+static void pa_print_fp_reg (int);
+static void pa_strcat_fp_reg (int, struct ui_file *, enum precision_type);
+static void record_text_segment_lowaddr (bfd *, asection *, void *);
+/* FIXME: brobecker 2002-11-07: We will likely be able to make the
+ following functions static, once we hppa is partially multiarched. */
+int hppa_reg_struct_has_addr (int gcc_p, struct type *type);
+CORE_ADDR hppa_skip_prologue (CORE_ADDR pc);
+CORE_ADDR hppa_skip_trampoline_code (CORE_ADDR pc);
+int hppa_in_solib_call_trampoline (CORE_ADDR pc, char *name);
+int hppa_in_solib_return_trampoline (CORE_ADDR pc, char *name);
+CORE_ADDR hppa_saved_pc_after_call (struct frame_info *frame);
+int hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs);
+CORE_ADDR hppa_stack_align (CORE_ADDR sp);
+int hppa_pc_requires_run_before_use (CORE_ADDR pc);
+int hppa_instruction_nullified (void);
+int hppa_register_raw_size (int reg_nr);
+int hppa_register_byte (int reg_nr);
+struct type * hppa_register_virtual_type (int reg_nr);
+void hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
+void hppa_extract_return_value (struct type *type, char *regbuf, char *valbuf);
+int hppa_use_struct_convention (int gcc_p, struct type *type);
+void hppa_store_return_value (struct type *type, char *valbuf);
+CORE_ADDR hppa_extract_struct_value_address (char *regbuf);
+int hppa_cannot_store_register (int regnum);
+void hppa_init_extra_frame_info (int fromleaf, struct frame_info *frame);
+CORE_ADDR hppa_frame_chain (struct frame_info *frame);
+int hppa_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe);
+int hppa_frameless_function_invocation (struct frame_info *frame);
+CORE_ADDR hppa_frame_saved_pc (struct frame_info *frame);
+CORE_ADDR hppa_frame_args_address (struct frame_info *fi);
+CORE_ADDR hppa_frame_locals_address (struct frame_info *fi);
+int hppa_frame_num_args (struct frame_info *frame);
+void hppa_push_dummy_frame (void);
+void hppa_pop_frame (void);
+CORE_ADDR hppa_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
+ int nargs, struct value **args,
+ struct type *type, int gcc_p);
+CORE_ADDR hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr);
+CORE_ADDR hppa_smash_text_address (CORE_ADDR addr);
+CORE_ADDR hppa_target_read_pc (ptid_t ptid);
+void hppa_target_write_pc (CORE_ADDR v, ptid_t ptid);
+CORE_ADDR hppa_target_read_fp (void);
+
+typedef struct
+ {
+ struct minimal_symbol *msym;
+ CORE_ADDR solib_handle;
+ CORE_ADDR return_val;
+ }
+args_for_find_stub;
-static CORE_ADDR cover_find_stub_with_shl_get PARAMS ((args_for_find_stub *));
+static int cover_find_stub_with_shl_get (void *);
-static int is_pa_2 = 0; /* False */
+static int is_pa_2 = 0; /* False */
-/* This is declared in symtab.c; set to 1 in hp-symtab-read.c */
+/* This is declared in symtab.c; set to 1 in hp-symtab-read.c */
extern int hp_som_som_object_present;
/* In breakpoint.c */
extern int exception_catchpoints_are_fragile;
-/* This is defined in valops.c. */
-extern value_ptr
-find_function_in_inferior PARAMS((char *));
-
/* Should call_function allocate stack space for a struct return? */
+
int
-hppa_use_struct_convention (gcc_p, type)
- int gcc_p;
- struct type *type;
+hppa_use_struct_convention (int gcc_p, struct type *type)
{
- return (TYPE_LENGTH (type) > 8);
+ return (TYPE_LENGTH (type) > 2 * REGISTER_SIZE);
}
-
\f
+
/* Routines to extract various sized constants out of hppa
instructions. */
value. */
static int
-sign_extend (val, bits)
- unsigned val, bits;
+sign_extend (unsigned val, unsigned bits)
{
- return (int)(val >> (bits - 1) ? (-1 << bits) | val : val);
+ return (int) (val >> (bits - 1) ? (-1 << bits) | val : val);
}
/* For many immediate values the sign bit is the low bit! */
static int
-low_sign_extend (val, bits)
- unsigned val, bits;
+low_sign_extend (unsigned val, unsigned bits)
{
- return (int)((val & 0x1 ? (-1 << (bits - 1)) : 0) | val >> 1);
+ return (int) ((val & 0x1 ? (-1 << (bits - 1)) : 0) | val >> 1);
}
/* extract the immediate field from a ld{bhw}s instruction */
-#if 0
-
-unsigned
-get_field (val, from, to)
- unsigned val, from, to;
-{
- val = val >> 31 - to;
- return val & ((1 << 32 - from) - 1);
-}
-
-unsigned
-set_field (val, from, to, new_val)
- unsigned *val, from, to;
-{
- unsigned mask = ~((1 << (to - from + 1)) << (31 - from));
- return *val = *val & mask | (new_val << (31 - from));
-}
-
-/* extract a 3-bit space register number from a be, ble, mtsp or mfsp */
-
-int
-extract_3 (word)
- unsigned word;
-{
- return GET_FIELD (word, 18, 18) << 2 | GET_FIELD (word, 16, 17);
-}
-
-#endif
-
static int
-extract_5_load (word)
- unsigned word;
+extract_5_load (unsigned word)
{
return low_sign_extend (word >> 16 & MASK_5, 5);
}
-#if 0
-
-/* extract the immediate field from a st{bhw}s instruction */
-
-int
-extract_5_store (word)
- unsigned word;
-{
- return low_sign_extend (word & MASK_5, 5);
-}
-
-#endif /* 0 */
-
/* extract the immediate field from a break instruction */
static unsigned
-extract_5r_store (word)
- unsigned word;
+extract_5r_store (unsigned word)
{
return (word & MASK_5);
}
/* extract the immediate field from a {sr}sm instruction */
static unsigned
-extract_5R_store (word)
- unsigned word;
+extract_5R_store (unsigned word)
{
return (word >> 16 & MASK_5);
}
-/* extract an 11 bit immediate field */
-
-#if 0
-
-int
-extract_11 (word)
- unsigned word;
-{
- return low_sign_extend (word & MASK_11, 11);
-}
-
-#endif
-
/* extract a 14 bit immediate field */
static int
-extract_14 (word)
- unsigned word;
+extract_14 (unsigned word)
{
return low_sign_extend (word & MASK_14, 14);
}
/* deposit a 14 bit constant in a word */
static unsigned
-deposit_14 (opnd, word)
- int opnd;
- unsigned word;
+deposit_14 (int opnd, unsigned word)
{
unsigned sign = (opnd < 0 ? 1 : 0);
- return word | ((unsigned)opnd << 1 & MASK_14) | sign;
+ return word | ((unsigned) opnd << 1 & MASK_14) | sign;
}
/* extract a 21 bit constant */
static int
-extract_21 (word)
- unsigned word;
+extract_21 (unsigned word)
{
int val;
the low 21 bits of opnd are relevant */
static unsigned
-deposit_21 (opnd, word)
- unsigned opnd, word;
+deposit_21 (unsigned opnd, unsigned word)
{
unsigned val = 0;
return word | val;
}
-/* extract a 12 bit constant from branch instructions */
-
-#if 0
-
-int
-extract_12 (word)
- unsigned word;
-{
- return sign_extend (GET_FIELD (word, 19, 28) |
- GET_FIELD (word, 29, 29) << 10 |
- (word & 0x1) << 11, 12) << 2;
-}
-
-/* Deposit a 17 bit constant in an instruction (like bl). */
-
-unsigned int
-deposit_17 (opnd, word)
- unsigned opnd, word;
-{
- word |= GET_FIELD (opnd, 15 + 0, 15 + 0); /* w */
- word |= GET_FIELD (opnd, 15 + 1, 15 + 5) << 16; /* w1 */
- word |= GET_FIELD (opnd, 15 + 6, 15 + 6) << 2; /* w2[10] */
- word |= GET_FIELD (opnd, 15 + 7, 15 + 16) << 3; /* w2[0..9] */
-
- return word;
-}
-
-#endif
-
/* extract a 17 bit constant from branch instructions, returning the
19 bit signed value. */
static int
-extract_17 (word)
- unsigned word;
+extract_17 (unsigned word)
{
return sign_extend (GET_FIELD (word, 19, 28) |
GET_FIELD (word, 29, 29) << 10 |
larger than the first, and zero if they are equal. */
static int
-compare_unwind_entries (arg1, arg2)
- const void *arg1;
- const void *arg2;
+compare_unwind_entries (const void *arg1, const void *arg2)
{
const struct unwind_table_entry *a = arg1;
const struct unwind_table_entry *b = arg2;
return 0;
}
+static CORE_ADDR low_text_segment_address;
+
+static void
+record_text_segment_lowaddr (bfd *abfd, asection *section, void *ignored)
+{
+ if (((section->flags & (SEC_ALLOC | SEC_LOAD | SEC_READONLY))
+ == (SEC_ALLOC | SEC_LOAD | SEC_READONLY))
+ && section->vma < low_text_segment_address)
+ low_text_segment_address = section->vma;
+}
+
static void
-internalize_unwinds (objfile, table, section, entries, size, text_offset)
- struct objfile *objfile;
- struct unwind_table_entry *table;
- asection *section;
- unsigned int entries, size;
- CORE_ADDR text_offset;
+internalize_unwinds (struct objfile *objfile, struct unwind_table_entry *table,
+ asection *section, unsigned int entries, unsigned int size,
+ CORE_ADDR text_offset)
{
/* We will read the unwind entries into temporary memory, then
fill in the actual unwind table. */
unsigned i;
char *buf = alloca (size);
+ low_text_segment_address = -1;
+
+ /* If addresses are 64 bits wide, then unwinds are supposed to
+ be segment relative offsets instead of absolute addresses.
+
+ Note that when loading a shared library (text_offset != 0) the
+ unwinds are already relative to the text_offset that will be
+ passed in. */
+ if (TARGET_PTR_BIT == 64 && text_offset == 0)
+ {
+ bfd_map_over_sections (objfile->obfd,
+ record_text_segment_lowaddr, NULL);
+
+ /* ?!? Mask off some low bits. Should this instead subtract
+ out the lowest section's filepos or something like that?
+ This looks very hokey to me. */
+ low_text_segment_address &= ~0xfff;
+ text_offset += low_text_segment_address;
+ }
+
bfd_get_section_contents (objfile->obfd, section, buf, 0, size);
/* Now internalize the information being careful to handle host/target
- endian issues. */
+ endian issues. */
for (i = 0; i < entries; i++)
{
table[i].region_start = bfd_get_32 (objfile->obfd,
- (bfd_byte *)buf);
+ (bfd_byte *) buf);
table[i].region_start += text_offset;
buf += 4;
- table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
+ table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *) buf);
table[i].region_end += text_offset;
buf += 4;
- tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
+ tmp = bfd_get_32 (objfile->obfd, (bfd_byte *) buf);
buf += 4;
table[i].Cannot_unwind = (tmp >> 31) & 0x1;
table[i].Millicode = (tmp >> 30) & 0x1;
table[i].Save_MRP_in_frame = (tmp >> 2) & 0x1;
table[i].extn_ptr_defined = (tmp >> 1) & 0x1;
table[i].Cleanup_defined = tmp & 0x1;
- tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf);
+ tmp = bfd_get_32 (objfile->obfd, (bfd_byte *) buf);
buf += 4;
table[i].MPE_XL_interrupt_marker = (tmp >> 31) & 0x1;
table[i].HP_UX_interrupt_marker = (tmp >> 30) & 0x1;
table[i].reserved4 = (tmp >> 27) & 0x1;
table[i].Total_frame_size = tmp & 0x7ffffff;
- /* Stub unwinds are handled elsewhere. */
+ /* Stub unwinds are handled elsewhere. */
table[i].stub_unwind.stub_type = 0;
table[i].stub_unwind.padding = 0;
}
gets freed when the objfile is destroyed. */
static void
-read_unwind_info (objfile)
- struct objfile *objfile;
+read_unwind_info (struct objfile *objfile)
{
- asection *unwind_sec, *elf_unwind_sec, *stub_unwind_sec;
- unsigned unwind_size, elf_unwind_size, stub_unwind_size, total_size;
- unsigned index, unwind_entries, elf_unwind_entries;
+ asection *unwind_sec, *stub_unwind_sec;
+ unsigned unwind_size, stub_unwind_size, total_size;
+ unsigned index, unwind_entries;
unsigned stub_entries, total_entries;
CORE_ADDR text_offset;
struct obj_unwind_info *ui;
obj_private_data_t *obj_private;
text_offset = ANOFFSET (objfile->section_offsets, 0);
- ui = (struct obj_unwind_info *)obstack_alloc (&objfile->psymbol_obstack,
- sizeof (struct obj_unwind_info));
+ ui = (struct obj_unwind_info *) obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct obj_unwind_info));
ui->table = NULL;
ui->cache = NULL;
ui->last = -1;
- /* Get hooks to all unwind sections. Note there is no linker-stub unwind
- section in ELF at the moment. */
- unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_START$");
- elf_unwind_sec = bfd_get_section_by_name (objfile->obfd, ".PARISC.unwind");
- stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$");
-
- /* Get sizes and unwind counts for all sections. */
- if (unwind_sec)
- {
- unwind_size = bfd_section_size (objfile->obfd, unwind_sec);
- unwind_entries = unwind_size / UNWIND_ENTRY_SIZE;
- }
- else
+ /* For reasons unknown the HP PA64 tools generate multiple unwinder
+ sections in a single executable. So we just iterate over every
+ section in the BFD looking for unwinder sections intead of trying
+ to do a lookup with bfd_get_section_by_name.
+
+ First determine the total size of the unwind tables so that we
+ can allocate memory in a nice big hunk. */
+ total_entries = 0;
+ for (unwind_sec = objfile->obfd->sections;
+ unwind_sec;
+ unwind_sec = unwind_sec->next)
{
- unwind_size = 0;
- unwind_entries = 0;
- }
+ if (strcmp (unwind_sec->name, "$UNWIND_START$") == 0
+ || strcmp (unwind_sec->name, ".PARISC.unwind") == 0)
+ {
+ unwind_size = bfd_section_size (objfile->obfd, unwind_sec);
+ unwind_entries = unwind_size / UNWIND_ENTRY_SIZE;
- if (elf_unwind_sec)
- {
- elf_unwind_size = bfd_section_size (objfile->obfd, elf_unwind_sec); /* purecov: deadcode */
- elf_unwind_entries = elf_unwind_size / UNWIND_ENTRY_SIZE; /* purecov: deadcode */
- }
- else
- {
- elf_unwind_size = 0;
- elf_unwind_entries = 0;
+ total_entries += unwind_entries;
+ }
}
+ /* Now compute the size of the stub unwinds. Note the ELF tools do not
+ use stub unwinds at the curren time. */
+ stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$");
+
if (stub_unwind_sec)
{
stub_unwind_size = bfd_section_size (objfile->obfd, stub_unwind_sec);
}
/* Compute total number of unwind entries and their total size. */
- total_entries = unwind_entries + elf_unwind_entries + stub_entries;
+ total_entries += stub_entries;
total_size = total_entries * sizeof (struct unwind_table_entry);
/* Allocate memory for the unwind table. */
ui->table = (struct unwind_table_entry *)
obstack_alloc (&objfile->psymbol_obstack, total_size);
- ui->last = total_entries - 1;
+ ui->last = total_entries - 1;
- /* Internalize the standard unwind entries. */
+ /* Now read in each unwind section and internalize the standard unwind
+ entries. */
index = 0;
- internalize_unwinds (objfile, &ui->table[index], unwind_sec,
- unwind_entries, unwind_size, text_offset);
- index += unwind_entries;
- internalize_unwinds (objfile, &ui->table[index], elf_unwind_sec,
- elf_unwind_entries, elf_unwind_size, text_offset);
- index += elf_unwind_entries;
-
- /* Now internalize the stub unwind entries. */
+ for (unwind_sec = objfile->obfd->sections;
+ unwind_sec;
+ unwind_sec = unwind_sec->next)
+ {
+ if (strcmp (unwind_sec->name, "$UNWIND_START$") == 0
+ || strcmp (unwind_sec->name, ".PARISC.unwind") == 0)
+ {
+ unwind_size = bfd_section_size (objfile->obfd, unwind_sec);
+ unwind_entries = unwind_size / UNWIND_ENTRY_SIZE;
+
+ internalize_unwinds (objfile, &ui->table[index], unwind_sec,
+ unwind_entries, unwind_size, text_offset);
+ index += unwind_entries;
+ }
+ }
+
+ /* Now read in and internalize the stub unwind entries. */
if (stub_unwind_size > 0)
{
unsigned int i;
ui->table[index].region_start += text_offset;
buf += 4;
ui->table[index].stub_unwind.stub_type = bfd_get_8 (objfile->obfd,
- (bfd_byte *) buf);
+ (bfd_byte *) buf);
buf += 2;
ui->table[index].region_end
- = ui->table[index].region_start + 4 *
- (bfd_get_16 (objfile->obfd, (bfd_byte *) buf) - 1);
+ = ui->table[index].region_start + 4 *
+ (bfd_get_16 (objfile->obfd, (bfd_byte *) buf) - 1);
buf += 2;
}
compare_unwind_entries);
/* Keep a pointer to the unwind information. */
- if(objfile->obj_private == NULL)
+ if (objfile->obj_private == NULL)
{
obj_private = (obj_private_data_t *)
- obstack_alloc(&objfile->psymbol_obstack,
- sizeof(obj_private_data_t));
+ obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (obj_private_data_t));
obj_private->unwind_info = NULL;
- obj_private->so_info = NULL;
-
- objfile->obj_private = (PTR) obj_private;
+ obj_private->so_info = NULL;
+ obj_private->dp = 0;
+
+ objfile->obj_private = obj_private;
}
- obj_private = (obj_private_data_t *)objfile->obj_private;
+ obj_private = (obj_private_data_t *) objfile->obj_private;
obj_private->unwind_info = ui;
}
search of the unwind tables, we depend upon them to be sorted. */
struct unwind_table_entry *
-find_unwind_entry(pc)
- CORE_ADDR pc;
+find_unwind_entry (CORE_ADDR pc)
{
int first, middle, last;
struct objfile *objfile;
return NULL;
ALL_OBJFILES (objfile)
- {
- struct obj_unwind_info *ui;
- ui = NULL;
- if (objfile->obj_private)
- ui = ((obj_private_data_t *)(objfile->obj_private))->unwind_info;
+ {
+ struct obj_unwind_info *ui;
+ ui = NULL;
+ if (objfile->obj_private)
+ ui = ((obj_private_data_t *) (objfile->obj_private))->unwind_info;
- if (!ui)
- {
- read_unwind_info (objfile);
- if (objfile->obj_private == NULL)
- error ("Internal error reading unwind information."); /* purecov: deadcode */
- ui = ((obj_private_data_t *)(objfile->obj_private))->unwind_info;
- }
+ if (!ui)
+ {
+ read_unwind_info (objfile);
+ if (objfile->obj_private == NULL)
+ error ("Internal error reading unwind information.");
+ ui = ((obj_private_data_t *) (objfile->obj_private))->unwind_info;
+ }
- /* First, check the cache */
+ /* First, check the cache */
- if (ui->cache
- && pc >= ui->cache->region_start
- && pc <= ui->cache->region_end)
- return ui->cache;
+ if (ui->cache
+ && pc >= ui->cache->region_start
+ && pc <= ui->cache->region_end)
+ return ui->cache;
- /* Not in the cache, do a binary search */
+ /* Not in the cache, do a binary search */
- first = 0;
- last = ui->last;
+ first = 0;
+ last = ui->last;
- while (first <= last)
- {
- middle = (first + last) / 2;
- if (pc >= ui->table[middle].region_start
- && pc <= ui->table[middle].region_end)
- {
- ui->cache = &ui->table[middle];
- return &ui->table[middle];
- }
+ while (first <= last)
+ {
+ middle = (first + last) / 2;
+ if (pc >= ui->table[middle].region_start
+ && pc <= ui->table[middle].region_end)
+ {
+ ui->cache = &ui->table[middle];
+ return &ui->table[middle];
+ }
- if (pc < ui->table[middle].region_start)
- last = middle - 1;
- else
- first = middle + 1;
- }
- } /* ALL_OBJFILES() */
+ if (pc < ui->table[middle].region_start)
+ last = middle - 1;
+ else
+ first = middle + 1;
+ }
+ } /* ALL_OBJFILES() */
return NULL;
}
bizarre way in which someone (?) decided they wanted to handle
frame pointerless code in GDB. */
int
-hpread_adjust_stack_address (func_addr)
- CORE_ADDR func_addr;
+hpread_adjust_stack_address (CORE_ADDR func_addr)
{
struct unwind_table_entry *u;
kind. */
static int
-pc_in_interrupt_handler (pc)
- CORE_ADDR pc;
+pc_in_interrupt_handler (CORE_ADDR pc)
{
struct unwind_table_entry *u;
struct minimal_symbol *msym_us;
its frame isn't a pure interrupt frame. Deal with this. */
msym_us = lookup_minimal_symbol_by_pc (pc);
- return u->HP_UX_interrupt_marker && !IN_SIGTRAMP (pc, SYMBOL_NAME (msym_us));
+ return (u->HP_UX_interrupt_marker
+ && !PC_IN_SIGTRAMP (pc, DEPRECATED_SYMBOL_NAME (msym_us)));
}
/* Called when no unwind descriptor was found for PC. Returns 1 if it
- appears that PC is in a linker stub. */
+ appears that PC is in a linker stub.
+
+ ?!? Need to handle stubs which appear in PA64 code. */
static int
-pc_in_linker_stub (pc)
- CORE_ADDR pc;
+pc_in_linker_stub (CORE_ADDR pc)
{
int found_magic_instruction = 0;
int i;
break;
/* Check for ldsid (rp),r1 which is the magic instruction for a
- return from a cross-space function call. */
+ return from a cross-space function call. */
if (read_memory_integer (pc + i * 4, 4) == 0x004010a1)
{
found_magic_instruction = 1;
break;
}
/* Add code to handle long call/branch and argument relocation stubs
- here. */
+ here. */
}
if (found_magic_instruction != 0)
break;
/* Check for ldsid (rp),r1 which is the magic instruction for a
- return from a cross-space function call. */
+ return from a cross-space function call. */
if (read_memory_integer (pc - i * 4, 4) == 0x004010a1)
{
found_magic_instruction = 1;
break;
}
/* Add code to handle long call/branch and argument relocation stubs
- here. */
+ here. */
}
return found_magic_instruction;
}
static int
-find_return_regnum(pc)
- CORE_ADDR pc;
+find_return_regnum (CORE_ADDR pc)
{
struct unwind_table_entry *u;
/* Return size of frame, or -1 if we should use a frame pointer. */
static int
-find_proc_framesize (pc)
- CORE_ADDR pc;
+find_proc_framesize (CORE_ADDR pc)
{
struct unwind_table_entry *u;
struct minimal_symbol *msym_us;
/* This may indicate a bug in our callers... */
- if (pc == (CORE_ADDR)0)
+ if (pc == (CORE_ADDR) 0)
return -1;
-
+
u = find_unwind_entry (pc);
if (!u)
/* If Save_SP is set, and we're not in an interrupt or signal caller,
then we have a frame pointer. Use it. */
- if (u->Save_SP && !pc_in_interrupt_handler (pc)
- && !IN_SIGTRAMP (pc, SYMBOL_NAME (msym_us)))
+ if (u->Save_SP
+ && !pc_in_interrupt_handler (pc)
+ && msym_us
+ && !PC_IN_SIGTRAMP (pc, DEPRECATED_SYMBOL_NAME (msym_us)))
return -1;
return u->Total_frame_size << 3;
}
/* Return offset from sp at which rp is saved, or 0 if not saved. */
-static int rp_saved PARAMS ((CORE_ADDR));
+static int rp_saved (CORE_ADDR);
static int
-rp_saved (pc)
- CORE_ADDR pc;
+rp_saved (CORE_ADDR pc)
{
struct unwind_table_entry *u;
}
if (u->Save_RP)
- return -20;
+ return (TARGET_PTR_BIT == 64 ? -16 : -20);
else if (u->stub_unwind.stub_type != 0)
{
switch (u->stub_unwind.stub_type)
}
\f
int
-frameless_function_invocation (frame)
- struct frame_info *frame;
+hppa_frameless_function_invocation (struct frame_info *frame)
{
struct unwind_table_entry *u;
return (u->Total_frame_size == 0 && u->stub_unwind.stub_type == 0);
}
+/* Immediately after a function call, return the saved pc.
+ Can't go through the frames for this because on some machines
+ the new frame is not set up until the new function executes
+ some instructions. */
+
CORE_ADDR
-saved_pc_after_call (frame)
- struct frame_info *frame;
+hppa_saved_pc_after_call (struct frame_info *frame)
{
int ret_regnum;
CORE_ADDR pc;
ret_regnum = find_return_regnum (get_frame_pc (frame));
pc = read_register (ret_regnum) & ~0x3;
-
+
/* If PC is in a linker stub, then we need to dig the address
the stub will return to out of the stack. */
u = find_unwind_entry (pc);
if (u && u->stub_unwind.stub_type != 0)
- return FRAME_SAVED_PC (frame);
+ return DEPRECATED_FRAME_SAVED_PC (frame);
else
return pc;
}
\f
CORE_ADDR
-hppa_frame_saved_pc (frame)
- struct frame_info *frame;
+hppa_frame_saved_pc (struct frame_info *frame)
{
CORE_ADDR pc = get_frame_pc (frame);
struct unwind_table_entry *u;
- CORE_ADDR old_pc;
- int spun_around_loop = 0;
- int rp_offset = 0;
+ CORE_ADDR old_pc = 0;
+ int spun_around_loop = 0;
+ int rp_offset = 0;
/* BSD, HPUX & OSF1 all lay out the hardware state in the same manner
at the base of the frame in an interrupt handler. Registers within
are saved in the exact same order as GDB numbers registers. How
convienent. */
if (pc_in_interrupt_handler (pc))
- return read_memory_integer (frame->frame + PC_REGNUM * 4, 4) & ~0x3;
+ return read_memory_integer (frame->frame + PC_REGNUM * 4,
+ TARGET_PTR_BIT / 8) & ~0x3;
+
+ if ((frame->pc >= frame->frame
+ && frame->pc <= (frame->frame
+ /* A call dummy is sized in words, but it is
+ actually a series of instructions. Account
+ for that scaling factor. */
+ + ((REGISTER_SIZE / INSTRUCTION_SIZE)
+ * CALL_DUMMY_LENGTH)
+ /* Similarly we have to account for 64bit
+ wide register saves. */
+ + (32 * REGISTER_SIZE)
+ /* We always consider FP regs 8 bytes long. */
+ + (NUM_REGS - FP0_REGNUM) * 8
+ /* Similarly we have to account for 64bit
+ wide register saves. */
+ + (6 * REGISTER_SIZE))))
+ {
+ return read_memory_integer ((frame->frame
+ + (TARGET_PTR_BIT == 64 ? -16 : -20)),
+ TARGET_PTR_BIT / 8) & ~0x3;
+ }
#ifdef FRAME_SAVED_PC_IN_SIGTRAMP
/* Deal with signal handler caller frames too. */
- if (frame->signal_handler_caller)
+ if ((get_frame_type (frame) == SIGTRAMP_FRAME))
{
CORE_ADDR rp;
FRAME_SAVED_PC_IN_SIGTRAMP (frame, &rp);
}
#endif
- if (frameless_function_invocation (frame))
+ if (hppa_frameless_function_invocation (frame))
{
int ret_regnum;
ret_regnum = find_return_regnum (pc);
/* If the next frame is an interrupt frame or a signal
- handler caller, then we need to look in the saved
- register area to get the return pointer (the values
- in the registers may not correspond to anything useful). */
- if (frame->next
- && (frame->next->signal_handler_caller
+ handler caller, then we need to look in the saved
+ register area to get the return pointer (the values
+ in the registers may not correspond to anything useful). */
+ if (frame->next
+ && ((get_frame_type (frame->next) == SIGTRAMP_FRAME)
|| pc_in_interrupt_handler (frame->next->pc)))
{
struct frame_saved_regs saved_regs;
- get_frame_saved_regs (frame->next, &saved_regs);
- if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM], 4) & 0x2)
+ deprecated_get_frame_saved_regs (frame->next, &saved_regs);
+ if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM],
+ TARGET_PTR_BIT / 8) & 0x2)
{
- pc = read_memory_integer (saved_regs.regs[31], 4) & ~0x3;
+ pc = read_memory_integer (saved_regs.regs[31],
+ TARGET_PTR_BIT / 8) & ~0x3;
/* Syscalls are really two frames. The syscall stub itself
- with a return pointer in %rp and the kernel call with
- a return pointer in %r31. We return the %rp variant
- if %r31 is the same as frame->pc. */
+ with a return pointer in %rp and the kernel call with
+ a return pointer in %r31. We return the %rp variant
+ if %r31 is the same as frame->pc. */
if (pc == frame->pc)
- pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
+ pc = read_memory_integer (saved_regs.regs[RP_REGNUM],
+ TARGET_PTR_BIT / 8) & ~0x3;
}
else
- pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
+ pc = read_memory_integer (saved_regs.regs[RP_REGNUM],
+ TARGET_PTR_BIT / 8) & ~0x3;
}
else
pc = read_register (ret_regnum) & ~0x3;
else
{
spun_around_loop = 0;
- old_pc = pc;
+ old_pc = pc;
-restart:
+ restart:
rp_offset = rp_saved (pc);
/* Similar to code in frameless function case. If the next
- frame is a signal or interrupt handler, then dig the right
- information out of the saved register info. */
+ frame is a signal or interrupt handler, then dig the right
+ information out of the saved register info. */
if (rp_offset == 0
&& frame->next
- && (frame->next->signal_handler_caller
+ && ((get_frame_type (frame->next) == SIGTRAMP_FRAME)
|| pc_in_interrupt_handler (frame->next->pc)))
{
struct frame_saved_regs saved_regs;
- get_frame_saved_regs (frame->next, &saved_regs);
- if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM], 4) & 0x2)
+ deprecated_get_frame_saved_regs (frame->next, &saved_regs);
+ if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM],
+ TARGET_PTR_BIT / 8) & 0x2)
{
- pc = read_memory_integer (saved_regs.regs[31], 4) & ~0x3;
+ pc = read_memory_integer (saved_regs.regs[31],
+ TARGET_PTR_BIT / 8) & ~0x3;
/* Syscalls are really two frames. The syscall stub itself
- with a return pointer in %rp and the kernel call with
- a return pointer in %r31. We return the %rp variant
- if %r31 is the same as frame->pc. */
+ with a return pointer in %rp and the kernel call with
+ a return pointer in %r31. We return the %rp variant
+ if %r31 is the same as frame->pc. */
if (pc == frame->pc)
- pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
+ pc = read_memory_integer (saved_regs.regs[RP_REGNUM],
+ TARGET_PTR_BIT / 8) & ~0x3;
}
else
- pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
+ pc = read_memory_integer (saved_regs.regs[RP_REGNUM],
+ TARGET_PTR_BIT / 8) & ~0x3;
}
else if (rp_offset == 0)
- {
- old_pc = pc;
- pc = read_register (RP_REGNUM) & ~0x3;
- }
+ {
+ old_pc = pc;
+ pc = read_register (RP_REGNUM) & ~0x3;
+ }
else
- {
- old_pc = pc;
- pc = read_memory_integer (frame->frame + rp_offset, 4) & ~0x3;
- }
+ {
+ old_pc = pc;
+ pc = read_memory_integer (frame->frame + rp_offset,
+ TARGET_PTR_BIT / 8) & ~0x3;
+ }
}
/* If PC is inside a linker stub, then dig out the address the stub
unsigned int insn;
/* If this is a dynamic executable, and we're in a signal handler,
- then the call chain will eventually point us into the stub for
- _sigreturn. Unlike most cases, we'll be pointed to the branch
- to the real sigreturn rather than the code after the real branch!.
+ then the call chain will eventually point us into the stub for
+ _sigreturn. Unlike most cases, we'll be pointed to the branch
+ to the real sigreturn rather than the code after the real branch!.
- Else, try to dig the address the stub will return to in the normal
- fashion. */
+ Else, try to dig the address the stub will return to in the normal
+ fashion. */
insn = read_memory_integer (pc, 4);
if ((insn & 0xfc00e000) == 0xe8000000)
return (pc + extract_17 (insn) + 8) & ~0x3;
else
{
- if (old_pc == pc)
- spun_around_loop++;
-
- if (spun_around_loop > 1)
- {
- /* We're just about to go around the loop again with
- no more hope of success. Die. */
- error("Unable to find return pc for this frame");
- }
- else
- goto restart;
+ if (old_pc == pc)
+ spun_around_loop++;
+
+ if (spun_around_loop > 1)
+ {
+ /* We're just about to go around the loop again with
+ no more hope of success. Die. */
+ error ("Unable to find return pc for this frame");
+ }
+ else
+ goto restart;
}
}
in a system call. */
void
-init_extra_frame_info (fromleaf, frame)
- int fromleaf;
- struct frame_info *frame;
+hppa_init_extra_frame_info (int fromleaf, struct frame_info *frame)
{
int flags;
int framesize;
if (frame->next && !fromleaf)
return;
- /* If the next frame represents a frameless function invocation
- then we have to do some adjustments that are normally done by
- FRAME_CHAIN. (FRAME_CHAIN is not called in this case.) */
+ /* If the next frame represents a frameless function invocation then
+ we have to do some adjustments that are normally done by
+ DEPRECATED_FRAME_CHAIN. (DEPRECATED_FRAME_CHAIN is not called in
+ this case.) */
if (fromleaf)
{
/* Find the framesize of *this* frame without peeking at the PC
- in the current frame structure (it isn't set yet). */
- framesize = find_proc_framesize (FRAME_SAVED_PC (get_next_frame (frame)));
+ in the current frame structure (it isn't set yet). */
+ framesize = find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (get_next_frame (frame)));
/* Now adjust our base frame accordingly. If we have a frame pointer
- use it, else subtract the size of this frame from the current
- frame. (we always want frame->frame to point at the lowest address
- in the frame). */
+ use it, else subtract the size of this frame from the current
+ frame. (we always want frame->frame to point at the lowest address
+ in the frame). */
if (framesize == -1)
frame->frame = TARGET_READ_FP ();
else
}
flags = read_register (FLAGS_REGNUM);
- if (flags & 2) /* In system call? */
+ if (flags & 2) /* In system call? */
frame->pc = read_register (31) & ~0x3;
/* The outermost frame is always derived from PC-framesize
explain, but the parent *always* creates some stack space for
the child. So the child actually does have a frame of some
sorts, and its base is the high address in its parent's frame. */
- framesize = find_proc_framesize(frame->pc);
+ framesize = find_proc_framesize (frame->pc);
if (framesize == -1)
frame->frame = TARGET_READ_FP ();
else
frame->frame = read_register (SP_REGNUM) - framesize;
}
\f
-/* Given a GDB frame, determine the address of the calling function's frame.
- This will be used to create a new GDB frame struct, and then
- INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
+/* Given a GDB frame, determine the address of the calling function's
+ frame. This will be used to create a new GDB frame struct, and
+ then DEPRECATED_INIT_EXTRA_FRAME_INFO and DEPRECATED_INIT_FRAME_PC
+ will be called for the new frame.
This may involve searching through prologues for several functions
at boundaries where GCC calls HP C code, or where code which has
a frame pointer calls code without a frame pointer. */
CORE_ADDR
-frame_chain (frame)
- struct frame_info *frame;
+hppa_frame_chain (struct frame_info *frame)
{
int my_framesize, caller_framesize;
struct unwind_table_entry *u;
CORE_ADDR frame_base;
struct frame_info *tmp_frame;
- CORE_ADDR caller_pc;
+ /* A frame in the current frame list, or zero. */
+ struct frame_info *saved_regs_frame = 0;
+ /* Where the registers were saved in saved_regs_frame.
+ If saved_regs_frame is zero, this is garbage. */
+ struct frame_saved_regs saved_regs;
+
+ CORE_ADDR caller_pc;
struct minimal_symbol *min_frame_symbol;
- struct symbol *frame_symbol;
- char *frame_symbol_name;
+ struct symbol *frame_symbol;
+ char *frame_symbol_name;
/* If this is a threaded application, and we see the
routine "__pthread_exit", treat it as the stack root
for this thread. */
- min_frame_symbol = lookup_minimal_symbol_by_pc (frame->pc);
- frame_symbol = find_pc_function(frame->pc);
+ min_frame_symbol = lookup_minimal_symbol_by_pc (frame->pc);
+ frame_symbol = find_pc_function (frame->pc);
- if ((min_frame_symbol != 0) /* && (frame_symbol == 0) */)
+ if ((min_frame_symbol != 0) /* && (frame_symbol == 0) */ )
{
- /* The test above for "no user function name" would defend
- against the slim likelihood that a user might define a
- routine named "__pthread_exit" and then try to debug it.
-
- If it weren't commented out, and you tried to debug the
- pthread library itself, you'd get errors.
-
- So for today, we don't make that check. */
- frame_symbol_name = SYMBOL_NAME(min_frame_symbol);
- if (frame_symbol_name != 0) {
- if (0 == strncmp(frame_symbol_name,
- THREAD_INITIAL_FRAME_SYMBOL,
- THREAD_INITIAL_FRAME_SYM_LEN)) {
- /* Pretend we've reached the bottom of the stack. */
- return (CORE_ADDR) 0;
- }
- }
- } /* End of hacky code for threads. */
-
+ /* The test above for "no user function name" would defend
+ against the slim likelihood that a user might define a
+ routine named "__pthread_exit" and then try to debug it.
+
+ If it weren't commented out, and you tried to debug the
+ pthread library itself, you'd get errors.
+
+ So for today, we don't make that check. */
+ frame_symbol_name = DEPRECATED_SYMBOL_NAME (min_frame_symbol);
+ if (frame_symbol_name != 0)
+ {
+ if (0 == strncmp (frame_symbol_name,
+ THREAD_INITIAL_FRAME_SYMBOL,
+ THREAD_INITIAL_FRAME_SYM_LEN))
+ {
+ /* Pretend we've reached the bottom of the stack. */
+ return (CORE_ADDR) 0;
+ }
+ }
+ } /* End of hacky code for threads. */
+
/* Handle HPUX, BSD, and OSF1 style interrupt frames first. These
are easy; at *sp we have a full save state strucutre which we can
pull the old stack pointer from. Also see frame_saved_pc for
code to dig a saved PC out of the save state structure. */
if (pc_in_interrupt_handler (frame->pc))
- frame_base = read_memory_integer (frame->frame + SP_REGNUM * 4, 4);
+ frame_base = read_memory_integer (frame->frame + SP_REGNUM * 4,
+ TARGET_PTR_BIT / 8);
#ifdef FRAME_BASE_BEFORE_SIGTRAMP
- else if (frame->signal_handler_caller)
+ else if ((get_frame_type (frame) == SIGTRAMP_FRAME))
{
FRAME_BASE_BEFORE_SIGTRAMP (frame, &frame_base);
}
/* Get frame sizes for the current frame and the frame of the
caller. */
my_framesize = find_proc_framesize (frame->pc);
- caller_pc = FRAME_SAVED_PC(frame);
+ caller_pc = DEPRECATED_FRAME_SAVED_PC (frame);
/* If we can't determine the caller's PC, then it's not likely we can
really determine anything meaningful about its frame. We'll consider
if (caller_pc == (CORE_ADDR) 0)
return (CORE_ADDR) 0;
- caller_framesize = find_proc_framesize (FRAME_SAVED_PC(frame));
+ caller_framesize = find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (frame));
/* If caller does not have a frame pointer, then its frame
can be found at current_frame - caller_framesize. */
The previous frame pointer is found at the top of the current frame. */
if (caller_framesize == -1 && my_framesize == -1)
{
- return read_memory_integer (frame_base, 4);
+ return read_memory_integer (frame_base, TARGET_PTR_BIT / 8);
}
/* Caller has a frame pointer, but callee does not. This is a little
more difficult as GCC and HP C lay out locals and callee register save
We use information from unwind descriptors to determine if %r3
is saved into the stack (Entry_GR field has this information). */
- tmp_frame = frame;
- while (tmp_frame)
+ for (tmp_frame = frame; tmp_frame; tmp_frame = tmp_frame->next)
{
u = find_unwind_entry (tmp_frame->pc);
think anyone has actually written any tools (not even "strip")
which leave them out of an executable, so maybe this is a moot
point. */
- /* ??rehrauer: Actually, it's quite possible to stepi your way into
- code that doesn't have unwind entries. For example, stepping into
- the dynamic linker will give you a PC that has none. Thus, I've
- disabled this warning. */
+ /* ??rehrauer: Actually, it's quite possible to stepi your way into
+ code that doesn't have unwind entries. For example, stepping into
+ the dynamic linker will give you a PC that has none. Thus, I've
+ disabled this warning. */
#if 0
warning ("Unable to find unwind for PC 0x%x -- Help!", tmp_frame->pc);
#endif
return (CORE_ADDR) 0;
}
- /* Entry_GR specifies the number of callee-saved general registers
- saved in the stack. It starts at %r3, so %r3 would be 1. */
- if (u->Entry_GR >= 1 || u->Save_SP
- || tmp_frame->signal_handler_caller
+ if (u->Save_SP
+ || (get_frame_type (tmp_frame) == SIGTRAMP_FRAME)
|| pc_in_interrupt_handler (tmp_frame->pc))
break;
- else
- tmp_frame = tmp_frame->next;
+
+ /* Entry_GR specifies the number of callee-saved general registers
+ saved in the stack. It starts at %r3, so %r3 would be 1. */
+ if (u->Entry_GR >= 1)
+ {
+ /* The unwind entry claims that r3 is saved here. However,
+ in optimized code, GCC often doesn't actually save r3.
+ We'll discover this if we look at the prologue. */
+ deprecated_get_frame_saved_regs (tmp_frame, &saved_regs);
+ saved_regs_frame = tmp_frame;
+
+ /* If we have an address for r3, that's good. */
+ if (saved_regs.regs[FP_REGNUM])
+ break;
+ }
}
if (tmp_frame)
{
/* We may have walked down the chain into a function with a frame
- pointer. */
+ pointer. */
if (u->Save_SP
- && !tmp_frame->signal_handler_caller
+ && !(get_frame_type (tmp_frame) == SIGTRAMP_FRAME)
&& !pc_in_interrupt_handler (tmp_frame->pc))
{
- return read_memory_integer (tmp_frame->frame, 4);
+ return read_memory_integer (tmp_frame->frame, TARGET_PTR_BIT / 8);
}
/* %r3 was saved somewhere in the stack. Dig it out. */
- else
+ else
{
- struct frame_saved_regs saved_regs;
-
/* Sick.
For optimization purposes many kernels don't have the
is usually turned off if the process is being traced so
that the debugger can get full register state for the
process.
-
+
This scheme works well except for two cases:
- * Attaching to a process when the process is in the
- kernel performing a system call (debugger can't get
- full register state for the inferior process since
- the process wasn't being traced when it entered the
- system call).
+ * Attaching to a process when the process is in the
+ kernel performing a system call (debugger can't get
+ full register state for the inferior process since
+ the process wasn't being traced when it entered the
+ system call).
- * Register state is not complete if the system call
- causes the process to core dump.
+ * Register state is not complete if the system call
+ causes the process to core dump.
The following heinous code is an attempt to deal with
fail miserably if the function which performs the
system call has a variable sized stack frame. */
- get_frame_saved_regs (tmp_frame, &saved_regs);
+ if (tmp_frame != saved_regs_frame)
+ deprecated_get_frame_saved_regs (tmp_frame, &saved_regs);
/* Abominable hack. */
if (current_target.to_has_execution == 0
&& ((saved_regs.regs[FLAGS_REGNUM]
- && (read_memory_integer (saved_regs.regs[FLAGS_REGNUM], 4)
+ && (read_memory_integer (saved_regs.regs[FLAGS_REGNUM],
+ TARGET_PTR_BIT / 8)
& 0x2))
|| (saved_regs.regs[FLAGS_REGNUM] == 0
&& read_register (FLAGS_REGNUM) & 0x2)))
{
- u = find_unwind_entry (FRAME_SAVED_PC (frame));
+ u = find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame));
if (!u)
{
- return read_memory_integer (saved_regs.regs[FP_REGNUM], 4);
+ return read_memory_integer (saved_regs.regs[FP_REGNUM],
+ TARGET_PTR_BIT / 8);
}
else
{
return frame_base - (u->Total_frame_size << 3);
}
}
-
- return read_memory_integer (saved_regs.regs[FP_REGNUM], 4);
+
+ return read_memory_integer (saved_regs.regs[FP_REGNUM],
+ TARGET_PTR_BIT / 8);
}
}
else
{
- struct frame_saved_regs saved_regs;
-
/* Get the innermost frame. */
tmp_frame = frame;
while (tmp_frame->next != NULL)
tmp_frame = tmp_frame->next;
- get_frame_saved_regs (tmp_frame, &saved_regs);
+ if (tmp_frame != saved_regs_frame)
+ deprecated_get_frame_saved_regs (tmp_frame, &saved_regs);
+
/* Abominable hack. See above. */
if (current_target.to_has_execution == 0
&& ((saved_regs.regs[FLAGS_REGNUM]
- && (read_memory_integer (saved_regs.regs[FLAGS_REGNUM], 4)
+ && (read_memory_integer (saved_regs.regs[FLAGS_REGNUM],
+ TARGET_PTR_BIT / 8)
& 0x2))
|| (saved_regs.regs[FLAGS_REGNUM] == 0
- && read_register (FLAGS_REGNUM) & 0x2)))
+ && read_register (FLAGS_REGNUM) & 0x2)))
{
- u = find_unwind_entry (FRAME_SAVED_PC (frame));
+ u = find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame));
if (!u)
{
- return read_memory_integer (saved_regs.regs[FP_REGNUM], 4);
+ return read_memory_integer (saved_regs.regs[FP_REGNUM],
+ TARGET_PTR_BIT / 8);
+ }
+ else
+ {
+ return frame_base - (u->Total_frame_size << 3);
}
- else
- {
- return frame_base - (u->Total_frame_size << 3);
- }
}
-
+
/* The value in %r3 was never saved into the stack (thus %r3 still
- holds the value of the previous frame pointer). */
+ holds the value of the previous frame pointer). */
return TARGET_READ_FP ();
}
}
-
\f
+
/* To see if a frame chain is valid, see if the caller looks like it
was compiled with gcc. */
int
-hppa_frame_chain_valid (chain, thisframe)
- CORE_ADDR chain;
- struct frame_info *thisframe;
+hppa_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)
{
struct minimal_symbol *msym_us;
struct minimal_symbol *msym_start;
struct unwind_table_entry *u, *next_u = NULL;
struct frame_info *next;
- if (!chain)
- return 0;
-
u = find_unwind_entry (thisframe->pc);
if (u == NULL)
indistinguishable (as nearly as I can tell) from the symbol for a function
which is (legitimately, since it is in the user's namespace)
named Ltext_end, so we can't just ignore it. */
- msym_us = lookup_minimal_symbol_by_pc (FRAME_SAVED_PC (thisframe));
+ msym_us = lookup_minimal_symbol_by_pc (DEPRECATED_FRAME_SAVED_PC (thisframe));
msym_start = lookup_minimal_symbol ("_start", NULL, NULL);
if (msym_us
&& msym_start
and doesn't "call" an interrupt routine or signal handler caller,
then its not valid. */
if (u->Save_SP || u->Total_frame_size || u->stub_unwind.stub_type != 0
- || (thisframe->next && thisframe->next->signal_handler_caller)
+ || (thisframe->next && (get_frame_type (thisframe->next) == SIGTRAMP_FRAME))
|| (next_u && next_u->HP_UX_interrupt_marker))
return 1;
return 0;
}
-/*
- These functions deal with saving and restoring register state
- around a function call in the inferior. They keep the stack
- double-word aligned; eventually, on an hp700, the stack will have
- to be aligned to a 64-byte boundary. */
+/* These functions deal with saving and restoring register state
+ around a function call in the inferior. They keep the stack
+ double-word aligned; eventually, on an hp700, the stack will have
+ to be aligned to a 64-byte boundary. */
void
-push_dummy_frame (inf_status)
- struct inferior_status *inf_status;
+hppa_push_dummy_frame (void)
{
CORE_ADDR sp, pc, pcspace;
register int regnum;
- int int_buffer;
+ CORE_ADDR int_buffer;
double freg_buffer;
- /* Oh, what a hack. If we're trying to perform an inferior call
- while the inferior is asleep, we have to make sure to clear
- the "in system call" bit in the flag register (the call will
- start after the syscall returns, so we're no longer in the system
- call!) This state is kept in "inf_status", change it there.
-
- We also need a number of horrid hacks to deal with lossage in the
- PC queue registers (apparently they're not valid when the in syscall
- bit is set). */
- pc = target_read_pc (inferior_pid);
+ pc = hppa_target_read_pc (inferior_ptid);
int_buffer = read_register (FLAGS_REGNUM);
if (int_buffer & 0x2)
{
- unsigned int sid;
- int_buffer &= ~0x2;
- memcpy (inf_status->registers, &int_buffer, 4);
- memcpy (inf_status->registers + REGISTER_BYTE (PCOQ_HEAD_REGNUM), &pc, 4);
- pc += 4;
- memcpy (inf_status->registers + REGISTER_BYTE (PCOQ_TAIL_REGNUM), &pc, 4);
- pc -= 4;
- sid = (pc >> 30) & 0x3;
+ const unsigned int sid = (pc >> 30) & 0x3;
if (sid == 0)
pcspace = read_register (SR4_REGNUM);
else
pcspace = read_register (SR4_REGNUM + 4 + sid);
- memcpy (inf_status->registers + REGISTER_BYTE (PCSQ_HEAD_REGNUM),
- &pcspace, 4);
- memcpy (inf_status->registers + REGISTER_BYTE (PCSQ_TAIL_REGNUM),
- &pcspace, 4);
}
else
pcspace = read_register (PCSQ_HEAD_REGNUM);
/* Space for "arguments"; the RP goes in here. */
sp = read_register (SP_REGNUM) + 48;
int_buffer = read_register (RP_REGNUM) | 0x3;
- write_memory (sp - 20, (char *)&int_buffer, 4);
+
+ /* The 32bit and 64bit ABIs save the return pointer into different
+ stack slots. */
+ if (REGISTER_SIZE == 8)
+ write_memory (sp - 16, (char *) &int_buffer, REGISTER_SIZE);
+ else
+ write_memory (sp - 20, (char *) &int_buffer, REGISTER_SIZE);
int_buffer = TARGET_READ_FP ();
- write_memory (sp, (char *)&int_buffer, 4);
+ write_memory (sp, (char *) &int_buffer, REGISTER_SIZE);
write_register (FP_REGNUM, sp);
- sp += 8;
+ sp += 2 * REGISTER_SIZE;
for (regnum = 1; regnum < 32; regnum++)
if (regnum != RP_REGNUM && regnum != FP_REGNUM)
sp = push_word (sp, read_register (regnum));
- sp += 4;
+ /* This is not necessary for the 64bit ABI. In fact it is dangerous. */
+ if (REGISTER_SIZE != 8)
+ sp += 4;
for (regnum = FP0_REGNUM; regnum < NUM_REGS; regnum++)
{
- read_register_bytes (REGISTER_BYTE (regnum), (char *)&freg_buffer, 8);
- sp = push_bytes (sp, (char *)&freg_buffer, 8);
+ deprecated_read_register_bytes (REGISTER_BYTE (regnum),
+ (char *) &freg_buffer, 8);
+ sp = push_bytes (sp, (char *) &freg_buffer, 8);
}
sp = push_word (sp, read_register (IPSW_REGNUM));
sp = push_word (sp, read_register (SAR_REGNUM));
}
static void
-find_dummy_frame_regs (frame, frame_saved_regs)
- struct frame_info *frame;
- struct frame_saved_regs *frame_saved_regs;
+find_dummy_frame_regs (struct frame_info *frame,
+ struct frame_saved_regs *frame_saved_regs)
{
CORE_ADDR fp = frame->frame;
int i;
- frame_saved_regs->regs[RP_REGNUM] = (fp - 20) & ~0x3;
+ /* The 32bit and 64bit ABIs save RP into different locations. */
+ if (REGISTER_SIZE == 8)
+ frame_saved_regs->regs[RP_REGNUM] = (fp - 16) & ~0x3;
+ else
+ frame_saved_regs->regs[RP_REGNUM] = (fp - 20) & ~0x3;
+
frame_saved_regs->regs[FP_REGNUM] = fp;
- frame_saved_regs->regs[1] = fp + 8;
- for (fp += 12, i = 3; i < 32; i++)
+ frame_saved_regs->regs[1] = fp + (2 * REGISTER_SIZE);
+
+ for (fp += 3 * REGISTER_SIZE, i = 3; i < 32; i++)
{
if (i != FP_REGNUM)
{
frame_saved_regs->regs[i] = fp;
- fp += 4;
+ fp += REGISTER_SIZE;
}
}
- fp += 4;
+ /* This is not necessary or desirable for the 64bit ABI. */
+ if (REGISTER_SIZE != 8)
+ fp += 4;
+
for (i = FP0_REGNUM; i < NUM_REGS; i++, fp += 8)
frame_saved_regs->regs[i] = fp;
frame_saved_regs->regs[IPSW_REGNUM] = fp;
- frame_saved_regs->regs[SAR_REGNUM] = fp + 4;
- frame_saved_regs->regs[PCOQ_HEAD_REGNUM] = fp + 8;
- frame_saved_regs->regs[PCSQ_HEAD_REGNUM] = fp + 12;
- frame_saved_regs->regs[PCOQ_TAIL_REGNUM] = fp + 16;
- frame_saved_regs->regs[PCSQ_TAIL_REGNUM] = fp + 20;
+ frame_saved_regs->regs[SAR_REGNUM] = fp + REGISTER_SIZE;
+ frame_saved_regs->regs[PCOQ_HEAD_REGNUM] = fp + 2 * REGISTER_SIZE;
+ frame_saved_regs->regs[PCSQ_HEAD_REGNUM] = fp + 3 * REGISTER_SIZE;
+ frame_saved_regs->regs[PCOQ_TAIL_REGNUM] = fp + 4 * REGISTER_SIZE;
+ frame_saved_regs->regs[PCSQ_TAIL_REGNUM] = fp + 5 * REGISTER_SIZE;
}
void
-hppa_pop_frame ()
+hppa_pop_frame (void)
{
register struct frame_info *frame = get_current_frame ();
register CORE_ADDR fp, npc, target_pc;
struct frame_saved_regs fsr;
double freg_buffer;
- fp = FRAME_FP (frame);
- get_frame_saved_regs (frame, &fsr);
+ fp = get_frame_base (frame);
+ deprecated_get_frame_saved_regs (frame, &fsr);
#ifndef NO_PC_SPACE_QUEUE_RESTORE
- if (fsr.regs[IPSW_REGNUM]) /* Restoring a call dummy frame */
+ if (fsr.regs[IPSW_REGNUM]) /* Restoring a call dummy frame */
restore_pc_queue (&fsr);
#endif
for (regnum = 31; regnum > 0; regnum--)
if (fsr.regs[regnum])
- write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
+ write_register (regnum, read_memory_integer (fsr.regs[regnum],
+ REGISTER_SIZE));
- for (regnum = NUM_REGS - 1; regnum >= FP0_REGNUM ; regnum--)
+ for (regnum = NUM_REGS - 1; regnum >= FP0_REGNUM; regnum--)
if (fsr.regs[regnum])
{
- read_memory (fsr.regs[regnum], (char *)&freg_buffer, 8);
- write_register_bytes (REGISTER_BYTE (regnum), (char *)&freg_buffer, 8);
+ read_memory (fsr.regs[regnum], (char *) &freg_buffer, 8);
+ deprecated_write_register_bytes (REGISTER_BYTE (regnum),
+ (char *) &freg_buffer, 8);
}
if (fsr.regs[IPSW_REGNUM])
write_register (IPSW_REGNUM,
- read_memory_integer (fsr.regs[IPSW_REGNUM], 4));
+ read_memory_integer (fsr.regs[IPSW_REGNUM],
+ REGISTER_SIZE));
if (fsr.regs[SAR_REGNUM])
write_register (SAR_REGNUM,
- read_memory_integer (fsr.regs[SAR_REGNUM], 4));
+ read_memory_integer (fsr.regs[SAR_REGNUM],
+ REGISTER_SIZE));
/* If the PC was explicitly saved, then just restore it. */
if (fsr.regs[PCOQ_TAIL_REGNUM])
{
- npc = read_memory_integer (fsr.regs[PCOQ_TAIL_REGNUM], 4);
+ npc = read_memory_integer (fsr.regs[PCOQ_TAIL_REGNUM],
+ REGISTER_SIZE);
write_register (PCOQ_TAIL_REGNUM, npc);
}
/* Else use the value in %rp to set the new PC. */
- else
+ else
{
npc = read_register (RP_REGNUM);
write_pc (npc);
}
- write_register (FP_REGNUM, read_memory_integer (fp, 4));
+ write_register (FP_REGNUM, read_memory_integer (fp, REGISTER_SIZE));
- if (fsr.regs[IPSW_REGNUM]) /* call dummy */
+ if (fsr.regs[IPSW_REGNUM]) /* call dummy */
write_register (SP_REGNUM, fp - 48);
else
write_register (SP_REGNUM, fp);
struct cleanup *old_chain;
/* Set up our breakpoint. Set it to be silent as the MI code
- for "return_command" will print the frame we returned to. */
+ for "return_command" will print the frame we returned to. */
sal = find_pc_line (target_pc, 0);
sal.pc = target_pc;
- breakpoint = set_momentary_breakpoint (sal, NULL, bp_finish);
+ breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_finish);
breakpoint->silent = 1;
/* So we can clean things up. */
- old_chain = make_cleanup ((make_cleanup_func) delete_breakpoint, breakpoint);
+ old_chain = make_cleanup_delete_breakpoint (breakpoint);
/* Start up the inferior. */
clear_proceed_status ();
queue space registers. */
static int
-restore_pc_queue (fsr)
- struct frame_saved_regs *fsr;
+restore_pc_queue (struct frame_saved_regs *fsr)
{
CORE_ADDR pc = read_pc ();
- CORE_ADDR new_pc = read_memory_integer (fsr->regs[PCOQ_HEAD_REGNUM], 4);
+ CORE_ADDR new_pc = read_memory_integer (fsr->regs[PCOQ_HEAD_REGNUM],
+ TARGET_PTR_BIT / 8);
struct target_waitstatus w;
int insn_count;
registers of the PC queue through ptrace. Boo, hiss.
Conveniently, the call dummy has this sequence of instructions
after the break:
- mtsp r21, sr0
- ble,n 0(sr0, r22)
-
+ mtsp r21, sr0
+ ble,n 0(sr0, r22)
+
So, load up the registers and single step until we are in the
right place. */
- write_register (21, read_memory_integer (fsr->regs[PCSQ_HEAD_REGNUM], 4));
+ write_register (21, read_memory_integer (fsr->regs[PCSQ_HEAD_REGNUM],
+ REGISTER_SIZE));
write_register (22, new_pc);
for (insn_count = 0; insn_count < 3; insn_count++)
{
/* FIXME: What if the inferior gets a signal right now? Want to
- merge this into wait_for_inferior (as a special kind of
- watchpoint? By setting a breakpoint at the end? Is there
- any other choice? Is there *any* way to do this stuff with
- ptrace() or some equivalent?). */
+ merge this into wait_for_inferior (as a special kind of
+ watchpoint? By setting a breakpoint at the end? Is there
+ any other choice? Is there *any* way to do this stuff with
+ ptrace() or some equivalent?). */
resume (1, 0);
- target_wait (inferior_pid, &w);
+ target_wait (inferior_ptid, &w);
if (w.kind == TARGET_WAITKIND_SIGNALLED)
- {
- stop_signal = w.value.sig;
- terminal_ours_for_output ();
- printf_unfiltered ("\nProgram terminated with signal %s, %s.\n",
+ {
+ stop_signal = w.value.sig;
+ terminal_ours_for_output ();
+ printf_unfiltered ("\nProgram terminated with signal %s, %s.\n",
target_signal_to_name (stop_signal),
target_signal_to_string (stop_signal));
- gdb_flush (gdb_stdout);
- return 0;
- }
+ gdb_flush (gdb_stdout);
+ return 0;
+ }
}
target_terminal_ours ();
target_fetch_registers (-1);
return 1;
}
-#if 0
+
+#ifdef PA20W_CALLING_CONVENTIONS
+
+/* This function pushes a stack frame with arguments as part of the
+ inferior function calling mechanism.
+
+ This is the version for the PA64, in which later arguments appear
+ at higher addresses. (The stack always grows towards higher
+ addresses.)
+
+ We simply allocate the appropriate amount of stack space and put
+ arguments into their proper slots. The call dummy code will copy
+ arguments into registers as needed by the ABI.
+
+ This ABI also requires that the caller provide an argument pointer
+ to the callee, so we do that too. */
+
CORE_ADDR
-hppa_push_arguments (nargs, args, sp, struct_return, struct_addr)
- int nargs;
- value_ptr *args;
- CORE_ADDR sp;
- int struct_return;
- CORE_ADDR struct_addr;
+hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr)
{
/* array of arguments' offsets */
- int *offset = (int *)alloca(nargs * sizeof (int));
- int cum = 0;
- int i, alignment;
-
+ int *offset = (int *) alloca (nargs * sizeof (int));
+
+ /* array of arguments' lengths: real lengths in bytes, not aligned to
+ word size */
+ int *lengths = (int *) alloca (nargs * sizeof (int));
+
+ /* The value of SP as it was passed into this function after
+ aligning. */
+ CORE_ADDR orig_sp = STACK_ALIGN (sp);
+
+ /* The number of stack bytes occupied by the current argument. */
+ int bytes_reserved;
+
+ /* The total number of bytes reserved for the arguments. */
+ int cum_bytes_reserved = 0;
+
+ /* Similarly, but aligned. */
+ int cum_bytes_aligned = 0;
+ int i;
+
+ /* Iterate over each argument provided by the user. */
for (i = 0; i < nargs; i++)
{
- int x = 0;
- /* cum is the sum of the lengths in bytes of
- the arguments seen so far */
- cum += TYPE_LENGTH (VALUE_TYPE (args[i]));
+ struct type *arg_type = VALUE_TYPE (args[i]);
+
+ /* Integral scalar values smaller than a register are padded on
+ the left. We do this by promoting them to full-width,
+ although the ABI says to pad them with garbage. */
+ if (is_integral_type (arg_type)
+ && TYPE_LENGTH (arg_type) < REGISTER_SIZE)
+ {
+ args[i] = value_cast ((TYPE_UNSIGNED (arg_type)
+ ? builtin_type_unsigned_long
+ : builtin_type_long),
+ args[i]);
+ arg_type = VALUE_TYPE (args[i]);
+ }
+
+ lengths[i] = TYPE_LENGTH (arg_type);
- /* value must go at proper alignment. Assume alignment is a
- power of two. */
- alignment = hppa_alignof (VALUE_TYPE (args[i]));
+ /* Align the size of the argument to the word size for this
+ target. */
+ bytes_reserved = (lengths[i] + REGISTER_SIZE - 1) & -REGISTER_SIZE;
- if (cum % alignment)
- cum = (cum + alignment) & -alignment;
- offset[i] = -cum;
+ offset[i] = cum_bytes_reserved;
+ /* Aggregates larger than eight bytes (the only types larger
+ than eight bytes we have) are aligned on a 16-byte boundary,
+ possibly padded on the right with garbage. This may leave an
+ empty word on the stack, and thus an unused register, as per
+ the ABI. */
+ if (bytes_reserved > 8)
+ {
+ /* Round up the offset to a multiple of two slots. */
+ int new_offset = ((offset[i] + 2*REGISTER_SIZE-1)
+ & -(2*REGISTER_SIZE));
+
+ /* Note the space we've wasted, if any. */
+ bytes_reserved += new_offset - offset[i];
+ offset[i] = new_offset;
+ }
+
+ cum_bytes_reserved += bytes_reserved;
}
- sp += max ((cum + 7) & -8, 16);
+ /* CUM_BYTES_RESERVED already accounts for all the arguments
+ passed by the user. However, the ABIs mandate minimum stack space
+ allocations for outgoing arguments.
+
+ The ABIs also mandate minimum stack alignments which we must
+ preserve. */
+ cum_bytes_aligned = STACK_ALIGN (cum_bytes_reserved);
+ sp += max (cum_bytes_aligned, REG_PARM_STACK_SPACE);
+
+ /* Now write each of the args at the proper offset down the stack. */
for (i = 0; i < nargs; i++)
- write_memory (sp + offset[i], VALUE_CONTENTS (args[i]),
- TYPE_LENGTH (VALUE_TYPE (args[i])));
+ write_memory (orig_sp + offset[i], VALUE_CONTENTS (args[i]), lengths[i]);
+ /* If a structure has to be returned, set up register 28 to hold its
+ address */
if (struct_return)
write_register (28, struct_addr);
- return sp + 32;
+
+ /* For the PA64 we must pass a pointer to the outgoing argument list.
+ The ABI mandates that the pointer should point to the first byte of
+ storage beyond the register flushback area.
+
+ However, the call dummy expects the outgoing argument pointer to
+ be passed in register %r4. */
+ write_register (4, orig_sp + REG_PARM_STACK_SPACE);
+
+ /* ?!? This needs further work. We need to set up the global data
+ pointer for this procedure. This assumes the same global pointer
+ for every procedure. The call dummy expects the dp value to
+ be passed in register %r6. */
+ write_register (6, read_register (27));
+
+ /* The stack will have 64 bytes of additional space for a frame marker. */
+ return sp + 64;
}
-#endif
-/* elz: I am rewriting this function, because the one above is a very
- obscure piece of code.
- This function pushes the arguments on the stack. The stack grows up
- on the PA.
- Each argument goes in one (or more) word (4 bytes) on the stack.
- The first four words for the args must be allocated, even if they
- are not used.
- The 'topmost' arg is arg0, the 'bottom-most' is arg3. (if you think of
- them as 1 word long).
- Below these there can be any number of arguments, as needed by the function.
- If an arg is bigger than one word, it will be written on the stack
- occupying as many words as needed. Args that are bigger than 64bits
- are not copied on the stack, a pointer is passed instead.
-
- On top of the arg0 word there are other 8 words (32bytes) which are used
- for other purposes */
+#else
+
+/* This function pushes a stack frame with arguments as part of the
+ inferior function calling mechanism.
+ This is the version of the function for the 32-bit PA machines, in
+ which later arguments appear at lower addresses. (The stack always
+ grows towards higher addresses.)
+
+ We simply allocate the appropriate amount of stack space and put
+ arguments into their proper slots. The call dummy code will copy
+ arguments into registers as needed by the ABI. */
+
CORE_ADDR
-hppa_push_arguments (nargs, args, sp, struct_return, struct_addr)
- int nargs;
- value_ptr *args;
- CORE_ADDR sp;
- int struct_return;
- CORE_ADDR struct_addr;
+hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr)
{
/* array of arguments' offsets */
- int *offset = (int *)alloca(nargs * sizeof (int));
- /* array of arguments' lengths: real lengths in bytes, not aligned to word size */
- int *lengths = (int *)alloca(nargs * sizeof (int));
-
- int bytes_reserved; /* this is the number of bytes on the stack occupied by an
- argument. This will be always a multiple of 4 */
-
- int cum_bytes_reserved = 0; /* this is the total number of bytes reserved by the args
- seen so far. It is a multiple of 4 always */
- int cum_bytes_aligned = 0; /* same as above, but aligned on 8 bytes */
- int i;
-
- /* When an arg does not occupy a whole word, for instance in bitfields:
- if the arg is x bits (0<x<32), it must be written
- starting from the (x-1)-th position down until the 0-th position.
- It is enough to align it to the word. */
- /* if an arg occupies 8 bytes, it must be aligned on the 64-bits
- high order word in odd arg word. */
- /* if an arg is larger than 64 bits, we need to pass a pointer to it, and
- copy the actual value on the stack, so that the callee can play with it.
- This is taken care of in valops.c in the call_function_by_hand function.
- The argument that is received in this function here has already be converted
- to a pointer to whatever is needed, so that it just can be pushed
- as a word argument */
-
+ int *offset = (int *) alloca (nargs * sizeof (int));
+
+ /* array of arguments' lengths: real lengths in bytes, not aligned to
+ word size */
+ int *lengths = (int *) alloca (nargs * sizeof (int));
+
+ /* The number of stack bytes occupied by the current argument. */
+ int bytes_reserved;
+
+ /* The total number of bytes reserved for the arguments. */
+ int cum_bytes_reserved = 0;
+
+ /* Similarly, but aligned. */
+ int cum_bytes_aligned = 0;
+ int i;
+
+ /* Iterate over each argument provided by the user. */
for (i = 0; i < nargs; i++)
{
-
lengths[i] = TYPE_LENGTH (VALUE_TYPE (args[i]));
- if (lengths[i] % 4)
- bytes_reserved = (lengths[i] / 4) * 4 + 4;
- else
- bytes_reserved = lengths[i];
+ /* Align the size of the argument to the word size for this
+ target. */
+ bytes_reserved = (lengths[i] + REGISTER_SIZE - 1) & -REGISTER_SIZE;
- offset[i] = cum_bytes_reserved + lengths[i];
+ offset[i] = (cum_bytes_reserved
+ + (lengths[i] > 4 ? bytes_reserved : lengths[i]));
- if ((bytes_reserved == 8) && (offset[i] % 8)) /* if 64-bit arg is not 64 bit aligned */
- {
- int new_offset=0;
- /* bytes_reserved is already aligned to the word, so we put it at one word
- more down the stack. This will leave one empty word on the
- stack, and one unused register. This is OK, see the calling
- convention doc */
- /* the offset may have to be moved to the corresponding position
- one word down the stack, to maintain
- alignment. */
- new_offset = (offset[i] / 8) * 8 + 8;
- if ((new_offset - offset[i]) >=4)
- {
- bytes_reserved += 4;
- offset[i] += 4;
- }
- }
+ /* If the argument is a double word argument, then it needs to be
+ double word aligned. */
+ if ((bytes_reserved == 2 * REGISTER_SIZE)
+ && (offset[i] % 2 * REGISTER_SIZE))
+ {
+ int new_offset = 0;
+ /* BYTES_RESERVED is already aligned to the word, so we put
+ the argument at one word more down the stack.
+
+ This will leave one empty word on the stack, and one unused
+ register as mandated by the ABI. */
+ new_offset = ((offset[i] + 2 * REGISTER_SIZE - 1)
+ & -(2 * REGISTER_SIZE));
+
+ if ((new_offset - offset[i]) >= 2 * REGISTER_SIZE)
+ {
+ bytes_reserved += REGISTER_SIZE;
+ offset[i] += REGISTER_SIZE;
+ }
+ }
cum_bytes_reserved += bytes_reserved;
}
- /* now move up the sp to reserve at least 4 words required for the args,
- or more than this if needed */
- /* wee also need to keep the sp aligned to 8 bytes */
+ /* CUM_BYTES_RESERVED already accounts for all the arguments passed
+ by the user. However, the ABI mandates minimum stack space
+ allocations for outgoing arguments.
+
+ The ABI also mandates minimum stack alignments which we must
+ preserve. */
cum_bytes_aligned = STACK_ALIGN (cum_bytes_reserved);
- sp += max (cum_bytes_aligned, 16);
+ sp += max (cum_bytes_aligned, REG_PARM_STACK_SPACE);
- /* now write each of the args at the proper offset down the stack */
+ /* Now write each of the args at the proper offset down the stack.
+ ?!? We need to promote values to a full register instead of skipping
+ words in the stack. */
for (i = 0; i < nargs; i++)
write_memory (sp - offset[i], VALUE_CONTENTS (args[i]), lengths[i]);
-
- /* if a structure has to be returned, set up register 28 to hold its address */
+ /* If a structure has to be returned, set up register 28 to hold its
+ address */
if (struct_return)
write_register (28, struct_addr);
- /* the stack will have other 8 words on top of the args */
+ /* The stack will have 32 bytes of additional space for a frame marker. */
return sp + 32;
}
+#endif
/* elz: this function returns a value which is built looking at the given address.
It is called from call_function_by_hand, in case we need to return a
This function does the same stuff as value_being_returned in values.c, but
gets the value from the stack rather than from the buffer where all the
registers were saved when the function called completed. */
-value_ptr
-hppa_value_returned_from_stack (valtype , addr)
- register struct type *valtype;
- CORE_ADDR addr;
+struct value *
+hppa_value_returned_from_stack (register struct type *valtype, CORE_ADDR addr)
{
- register value_ptr val;
+ register struct value *val;
val = allocate_value (valtype);
CHECK_TYPEDEF (valtype);
- target_read_memory(addr, VALUE_CONTENTS_RAW (val), TYPE_LENGTH (valtype));
+ target_read_memory (addr, VALUE_CONTENTS_RAW (val), TYPE_LENGTH (valtype));
return val;
}
/* elz: Used to lookup a symbol in the shared libraries.
- This function calls shl_findsym, indirectly through a
- call to __d_shl_get. __d_shl_get is in end.c, which is always
- linked in by the hp compilers/linkers.
- The call to shl_findsym cannot be made directly because it needs
- to be active in target address space.
- inputs: - minimal symbol pointer for the function we want to look up
- - address in target space of the descriptor for the library
- where we want to look the symbol up.
- This address is retrieved using the
- som_solib_get_solib_by_pc function (somsolib.c).
- output: - real address in the library of the function.
- note: the handle can be null, in which case shl_findsym will look for
- the symbol in all the loaded shared libraries.
- files to look at if you need reference on this stuff:
- dld.c, dld_shl_findsym.c
- end.c
- man entry for shl_findsym */
+ This function calls shl_findsym, indirectly through a
+ call to __d_shl_get. __d_shl_get is in end.c, which is always
+ linked in by the hp compilers/linkers.
+ The call to shl_findsym cannot be made directly because it needs
+ to be active in target address space.
+ inputs: - minimal symbol pointer for the function we want to look up
+ - address in target space of the descriptor for the library
+ where we want to look the symbol up.
+ This address is retrieved using the
+ som_solib_get_solib_by_pc function (somsolib.c).
+ output: - real address in the library of the function.
+ note: the handle can be null, in which case shl_findsym will look for
+ the symbol in all the loaded shared libraries.
+ files to look at if you need reference on this stuff:
+ dld.c, dld_shl_findsym.c
+ end.c
+ man entry for shl_findsym */
CORE_ADDR
-find_stub_with_shl_get(function, handle)
- struct minimal_symbol *function;
- CORE_ADDR handle;
+find_stub_with_shl_get (struct minimal_symbol *function, CORE_ADDR handle)
{
- struct symbol *get_sym, *symbol2;
- struct minimal_symbol *buff_minsym, *msymbol;
- struct type *ftype;
- value_ptr *args;
- value_ptr funcval, val;
-
- int x, namelen, err_value, tmp = -1;
- CORE_ADDR endo_buff_addr, value_return_addr, errno_return_addr;
- CORE_ADDR stub_addr;
-
-
- args = (value_ptr *) alloca (sizeof (value_ptr) * 8); /* 6 for the arguments and one null one??? */
- funcval = find_function_in_inferior("__d_shl_get");
- get_sym = lookup_symbol("__d_shl_get", NULL, VAR_NAMESPACE, NULL, NULL);
- buff_minsym = lookup_minimal_symbol("__buffer", NULL, NULL);
- msymbol = lookup_minimal_symbol ("__shldp", NULL, NULL);
- symbol2 = lookup_symbol("__shldp", NULL, VAR_NAMESPACE, NULL, NULL);
- endo_buff_addr = SYMBOL_VALUE_ADDRESS (buff_minsym);
- namelen = strlen(SYMBOL_NAME(function));
- value_return_addr = endo_buff_addr + namelen;
- ftype = check_typedef(SYMBOL_TYPE(get_sym));
-
- /* do alignment */
- if ((x=value_return_addr % 64) !=0)
- value_return_addr = value_return_addr + 64 - x;
-
- errno_return_addr = value_return_addr + 64;
+ struct symbol *get_sym, *symbol2;
+ struct minimal_symbol *buff_minsym, *msymbol;
+ struct type *ftype;
+ struct value **args;
+ struct value *funcval;
+ struct value *val;
-
- /* set up stuff needed by __d_shl_get in buffer in end.o */
+ int x, namelen, err_value, tmp = -1;
+ CORE_ADDR endo_buff_addr, value_return_addr, errno_return_addr;
+ CORE_ADDR stub_addr;
- target_write_memory(endo_buff_addr, SYMBOL_NAME(function), namelen);
-
- target_write_memory(value_return_addr, (char *) &tmp, 4);
-
- target_write_memory(errno_return_addr, (char *) &tmp, 4);
- target_write_memory(SYMBOL_VALUE_ADDRESS(msymbol),
- (char *)&handle, 4);
-
- /* now prepare the arguments for the call */
+ args = alloca (sizeof (struct value *) * 8); /* 6 for the arguments and one null one??? */
+ funcval = find_function_in_inferior ("__d_shl_get");
+ get_sym = lookup_symbol ("__d_shl_get", NULL, VAR_NAMESPACE, NULL, NULL);
+ buff_minsym = lookup_minimal_symbol ("__buffer", NULL, NULL);
+ msymbol = lookup_minimal_symbol ("__shldp", NULL, NULL);
+ symbol2 = lookup_symbol ("__shldp", NULL, VAR_NAMESPACE, NULL, NULL);
+ endo_buff_addr = SYMBOL_VALUE_ADDRESS (buff_minsym);
+ namelen = strlen (DEPRECATED_SYMBOL_NAME (function));
+ value_return_addr = endo_buff_addr + namelen;
+ ftype = check_typedef (SYMBOL_TYPE (get_sym));
- args[0] = value_from_longest (TYPE_FIELD_TYPE(ftype, 0), 12);
- args[1] = value_from_longest (TYPE_FIELD_TYPE(ftype, 1), SYMBOL_VALUE_ADDRESS(msymbol));
- args[2] = value_from_longest (TYPE_FIELD_TYPE(ftype, 2), endo_buff_addr);
- args[3] = value_from_longest (TYPE_FIELD_TYPE(ftype, 3), TYPE_PROCEDURE);
- args[4] = value_from_longest (TYPE_FIELD_TYPE(ftype, 4), value_return_addr);
- args[5] = value_from_longest (TYPE_FIELD_TYPE(ftype, 5), errno_return_addr);
+ /* do alignment */
+ if ((x = value_return_addr % 64) != 0)
+ value_return_addr = value_return_addr + 64 - x;
- /* now call the function */
+ errno_return_addr = value_return_addr + 64;
- val = call_function_by_hand(funcval, 6, args);
- /* now get the results */
+ /* set up stuff needed by __d_shl_get in buffer in end.o */
- target_read_memory(errno_return_addr, (char *) &err_value, sizeof(err_value));
+ target_write_memory (endo_buff_addr, DEPRECATED_SYMBOL_NAME (function), namelen);
- target_read_memory(value_return_addr, (char *) &stub_addr, sizeof(stub_addr));
- if (stub_addr <= 0)
- error("call to __d_shl_get failed, error code is %d", err_value); /* purecov: deadcode */
-
- return(stub_addr);
+ target_write_memory (value_return_addr, (char *) &tmp, 4);
+
+ target_write_memory (errno_return_addr, (char *) &tmp, 4);
+
+ target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol),
+ (char *) &handle, 4);
+
+ /* now prepare the arguments for the call */
+
+ args[0] = value_from_longest (TYPE_FIELD_TYPE (ftype, 0), 12);
+ args[1] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 1), SYMBOL_VALUE_ADDRESS (msymbol));
+ args[2] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 2), endo_buff_addr);
+ args[3] = value_from_longest (TYPE_FIELD_TYPE (ftype, 3), TYPE_PROCEDURE);
+ args[4] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 4), value_return_addr);
+ args[5] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 5), errno_return_addr);
+
+ /* now call the function */
+
+ val = call_function_by_hand (funcval, 6, args);
+
+ /* now get the results */
+
+ target_read_memory (errno_return_addr, (char *) &err_value, sizeof (err_value));
+
+ target_read_memory (value_return_addr, (char *) &stub_addr, sizeof (stub_addr));
+ if (stub_addr <= 0)
+ error ("call to __d_shl_get failed, error code is %d", err_value);
+
+ return (stub_addr);
}
-/* Cover routine for find_stub_with_shl_get to pass to catch_errors */
-static CORE_ADDR
-cover_find_stub_with_shl_get (args)
- args_for_find_stub * args;
+/* Cover routine for find_stub_with_shl_get to pass to catch_errors */
+static int
+cover_find_stub_with_shl_get (void *args_untyped)
{
- return find_stub_with_shl_get (args->msym, args->solib_handle);
+ args_for_find_stub *args = args_untyped;
+ args->return_val = find_stub_with_shl_get (args->msym, args->solib_handle);
+ return 0;
}
-
/* Insert the specified number of args and function address
into a call sequence of the above form stored at DUMMYNAME.
On the hppa we need to call the stack dummy through $$dyncall.
Therefore our version of FIX_CALL_DUMMY takes an extra argument,
real_pc, which is the location where gdb should start up the
- inferior to do the function call. */
+ inferior to do the function call.
-CORE_ADDR
-hppa_fix_call_dummy (dummy, pc, fun, nargs, args, type, gcc_p)
- char *dummy;
- CORE_ADDR pc;
- CORE_ADDR fun;
- int nargs;
- value_ptr *args;
- struct type *type;
- int gcc_p;
+ This has to work across several versions of hpux, bsd, osf1. It has to
+ work regardless of what compiler was used to build the inferior program.
+ It should work regardless of whether or not end.o is available. It has
+ to work even if gdb can not call into the dynamic loader in the inferior
+ to query it for symbol names and addresses.
+
+ Yes, all those cases should work. Luckily code exists to handle most
+ of them. The complexity is in selecting exactly what scheme should
+ be used to perform the inferior call.
+
+ At the current time this routine is known not to handle cases where
+ the program was linked with HP's compiler without including end.o.
+
+ Please contact Jeff Law (law@cygnus.com) before changing this code. */
+
+CORE_ADDR
+hppa_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
+ struct value **args, struct type *type, int gcc_p)
{
CORE_ADDR dyncall_addr;
struct minimal_symbol *msymbol;
struct minimal_symbol *trampoline;
int flags = read_register (FLAGS_REGNUM);
- struct unwind_table_entry *u;
- CORE_ADDR new_stub=0;
- CORE_ADDR solib_handle=0;
+ struct unwind_table_entry *u = NULL;
+ CORE_ADDR new_stub = 0;
+ CORE_ADDR solib_handle = 0;
+
+ /* Nonzero if we will use GCC's PLT call routine. This routine must be
+ passed an import stub, not a PLABEL. It is also necessary to set %r19
+ (the PIC register) before performing the call.
+
+ If zero, then we are using __d_plt_call (HP's PLT call routine) or we
+ are calling the target directly. When using __d_plt_call we want to
+ use a PLABEL instead of an import stub. */
+ int using_gcc_plt_call = 1;
+
+#ifdef GDB_TARGET_IS_HPPA_20W
+ /* We currently use completely different code for the PA2.0W inferior
+ function call sequences. This needs to be cleaned up. */
+ {
+ CORE_ADDR pcsqh, pcsqt, pcoqh, pcoqt, sr5;
+ struct target_waitstatus w;
+ int inst1, inst2;
+ char buf[4];
+ int status;
+ struct objfile *objfile;
+
+ /* We can not modify the PC space queues directly, so we start
+ up the inferior and execute a couple instructions to set the
+ space queues so that they point to the call dummy in the stack. */
+ pcsqh = read_register (PCSQ_HEAD_REGNUM);
+ sr5 = read_register (SR5_REGNUM);
+ if (1)
+ {
+ pcoqh = read_register (PCOQ_HEAD_REGNUM);
+ pcoqt = read_register (PCOQ_TAIL_REGNUM);
+ if (target_read_memory (pcoqh, buf, 4) != 0)
+ error ("Couldn't modify space queue\n");
+ inst1 = extract_unsigned_integer (buf, 4);
+
+ if (target_read_memory (pcoqt, buf, 4) != 0)
+ error ("Couldn't modify space queue\n");
+ inst2 = extract_unsigned_integer (buf, 4);
+
+ /* BVE (r1) */
+ *((int *) buf) = 0xe820d000;
+ if (target_write_memory (pcoqh, buf, 4) != 0)
+ error ("Couldn't modify space queue\n");
+
+ /* NOP */
+ *((int *) buf) = 0x08000240;
+ if (target_write_memory (pcoqt, buf, 4) != 0)
+ {
+ *((int *) buf) = inst1;
+ target_write_memory (pcoqh, buf, 4);
+ error ("Couldn't modify space queue\n");
+ }
+
+ write_register (1, pc);
+
+ /* Single step twice, the BVE instruction will set the space queue
+ such that it points to the PC value written immediately above
+ (ie the call dummy). */
+ resume (1, 0);
+ target_wait (inferior_ptid, &w);
+ resume (1, 0);
+ target_wait (inferior_ptid, &w);
+
+ /* Restore the two instructions at the old PC locations. */
+ *((int *) buf) = inst1;
+ target_write_memory (pcoqh, buf, 4);
+ *((int *) buf) = inst2;
+ target_write_memory (pcoqt, buf, 4);
+ }
+
+ /* The call dummy wants the ultimate destination address initially
+ in register %r5. */
+ write_register (5, fun);
+ /* We need to see if this objfile has a different DP value than our
+ own (it could be a shared library for example). */
+ ALL_OBJFILES (objfile)
+ {
+ struct obj_section *s;
+ obj_private_data_t *obj_private;
+
+ /* See if FUN is in any section within this shared library. */
+ for (s = objfile->sections; s < objfile->sections_end; s++)
+ if (s->addr <= fun && fun < s->endaddr)
+ break;
+
+ if (s >= objfile->sections_end)
+ continue;
+
+ obj_private = (obj_private_data_t *) objfile->obj_private;
+
+ /* The DP value may be different for each objfile. But within an
+ objfile each function uses the same dp value. Thus we do not need
+ to grope around the opd section looking for dp values.
+
+ ?!? This is not strictly correct since we may be in a shared library
+ and want to call back into the main program. To make that case
+ work correctly we need to set obj_private->dp for the main program's
+ objfile, then remove this conditional. */
+ if (obj_private->dp)
+ write_register (27, obj_private->dp);
+ break;
+ }
+ return pc;
+ }
+#endif
+
+#ifndef GDB_TARGET_IS_HPPA_20W
+ /* Prefer __gcc_plt_call over the HP supplied routine because
+ __gcc_plt_call works for any number of arguments. */
trampoline = NULL;
+ if (lookup_minimal_symbol ("__gcc_plt_call", NULL, NULL) == NULL)
+ using_gcc_plt_call = 0;
+
msymbol = lookup_minimal_symbol ("$$dyncall", NULL, NULL);
if (msymbol == NULL)
- error ("Can't find an address for $$dyncall trampoline"); /* purecov: deadcode */
+ error ("Can't find an address for $$dyncall trampoline");
dyncall_addr = SYMBOL_VALUE_ADDRESS (msymbol);
/* FUN could be a procedure label, in which case we have to get
- its real address and the value of its GOT/DP. */
- if (fun & 0x2)
+ its real address and the value of its GOT/DP if we plan to
+ call the routine via gcc_plt_call. */
+ if ((fun & 0x2) && using_gcc_plt_call)
{
/* Get the GOT/DP value for the target function. It's
- at *(fun+4). Note the call dummy is *NOT* allowed to
- trash %r19 before calling the target function. */
- write_register (19, read_memory_integer ((fun & ~0x3) + 4, 4));
+ at *(fun+4). Note the call dummy is *NOT* allowed to
+ trash %r19 before calling the target function. */
+ write_register (19, read_memory_integer ((fun & ~0x3) + 4,
+ REGISTER_SIZE));
/* Now get the real address for the function we are calling, it's
- at *fun. */
- fun = (CORE_ADDR) read_memory_integer (fun & ~0x3, 4);
+ at *fun. */
+ fun = (CORE_ADDR) read_memory_integer (fun & ~0x3,
+ TARGET_PTR_BIT / 8);
}
else
{
#ifndef GDB_TARGET_IS_PA_ELF
- /* FUN could be either an export stub, or the real address of a
- function in a shared library. We must call an import stub
- rather than the export stub or real function for lazy binding
- to work correctly. */
-
- /* elz: let's see if fun is in a shared library */
- solib_handle = som_solib_get_solib_by_pc(fun);
-
- /* elz: for 10.30 and 11.00 the calls via __d_plt_call cannot be made
- via import stubs, only via plables, so this code here becomes useless.
- On 10.20, the plables mechanism works too, so we just ignore this import
- stub stuff */
-#if 0
- if (solib_handle)
+ /* FUN could be an export stub, the real address of a function, or
+ a PLABEL. When using gcc's PLT call routine we must call an import
+ stub rather than the export stub or real function for lazy binding
+ to work correctly
+
+ If we are using the gcc PLT call routine, then we need to
+ get the import stub for the target function. */
+ if (using_gcc_plt_call && som_solib_get_got_by_pc (fun))
{
struct objfile *objfile;
struct minimal_symbol *funsymbol, *stub_symbol;
funsymbol = lookup_minimal_symbol_by_pc (fun);
if (!funsymbol)
- error ("Unable to find minimal symbol for target fucntion.\n");
+ error ("Unable to find minimal symbol for target function.\n");
/* Search all the object files for an import symbol with the
right name. */
ALL_OBJFILES (objfile)
- {
- stub_symbol = lookup_minimal_symbol (SYMBOL_NAME (funsymbol),
+ {
+ stub_symbol
+ = lookup_minimal_symbol_solib_trampoline
+ (DEPRECATED_SYMBOL_NAME (funsymbol), NULL, objfile);
+
+ if (!stub_symbol)
+ stub_symbol = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (funsymbol),
NULL, objfile);
- /* Found a symbol with the right name. */
- if (stub_symbol)
- {
- struct unwind_table_entry *u;
- /* It must be a shared library trampoline. */
- if (MSYMBOL_TYPE (stub_symbol) != mst_solib_trampoline)
- continue;
-
- /* It must also be an import stub. */
- u = find_unwind_entry (SYMBOL_VALUE (stub_symbol));
- if (!u || u->stub_unwind.stub_type != IMPORT)
- continue;
-
- /* OK. Looks like the correct import stub. */
- newfun = SYMBOL_VALUE (stub_symbol);
- fun = newfun;
- }
- }
+
+ /* Found a symbol with the right name. */
+ if (stub_symbol)
+ {
+ struct unwind_table_entry *u;
+ /* It must be a shared library trampoline. */
+ if (MSYMBOL_TYPE (stub_symbol) != mst_solib_trampoline)
+ continue;
+
+ /* It must also be an import stub. */
+ u = find_unwind_entry (SYMBOL_VALUE (stub_symbol));
+ if (u == NULL
+ || (u->stub_unwind.stub_type != IMPORT
+#ifdef GDB_NATIVE_HPUX_11
+ /* Sigh. The hpux 10.20 dynamic linker will blow
+ chunks if we perform a call to an unbound function
+ via the IMPORT_SHLIB stub. The hpux 11.00 dynamic
+ linker will blow chunks if we do not call the
+ unbound function via the IMPORT_SHLIB stub.
+
+ We currently have no way to select bevahior on just
+ the target. However, we only support HPUX/SOM in
+ native mode. So we conditinalize on a native
+ #ifdef. Ugly. Ugly. Ugly */
+ && u->stub_unwind.stub_type != IMPORT_SHLIB
+#endif
+ ))
+ continue;
+
+ /* OK. Looks like the correct import stub. */
+ newfun = SYMBOL_VALUE (stub_symbol);
+ fun = newfun;
+
+ /* If we found an IMPORT stub, then we want to stop
+ searching now. If we found an IMPORT_SHLIB, we want
+ to continue the search in the hopes that we will find
+ an IMPORT stub. */
+ if (u->stub_unwind.stub_type == IMPORT)
+ break;
+ }
+ }
+
+ /* Ouch. We did not find an import stub. Make an attempt to
+ do the right thing instead of just croaking. Most of the
+ time this will actually work. */
if (newfun == 0)
write_register (19, som_solib_get_got_by_pc (fun));
+
+ u = find_unwind_entry (fun);
+ if (u
+ && (u->stub_unwind.stub_type == IMPORT
+ || u->stub_unwind.stub_type == IMPORT_SHLIB))
+ trampoline = lookup_minimal_symbol ("__gcc_plt_call", NULL, NULL);
+
+ /* If we found the import stub in the shared library, then we have
+ to set %r19 before we call the stub. */
+ if (u && u->stub_unwind.stub_type == IMPORT_SHLIB)
+ write_register (19, som_solib_get_got_by_pc (fun));
}
-#endif /* end of if 0 */
#endif
}
- /* If we are calling an import stub (eg calling into a dynamic library)
- then have sr4export call the magic __d_plt_call routine which is linked
- in from end.o. (You can't use _sr4export to call the import stub as
- the value in sp-24 will get fried and you end up returning to the
- wrong location. You can't call the import stub directly as the code
- to bind the PLT entry to a function can't return to a stack address.) */
-
- /* elz:
- There does not have to be an import stub to call a routine in a
- different load module (note: a "load module" is an a.out or a shared
- library). If you call a routine indirectly, going through $$dyncall (or
- $$dyncall_external), you won't go through an import stub. Import stubs
- are only used for direct calls to an imported routine.
-
- What you (wdb) need is to go through $$dyncall with a proper plabel for
- the imported routine. shl_findsym() returns you the address of a plabel
- suitable for use in making an indirect call through, e.g., through
- $$dyncall.
- This is taken care below with the call to find_stub_.... */
-#if 0
- /* elz: this check here is not necessary if we are going to call stuff through
- plabels only, we just now check whether the function we call is in a shlib */
- u = find_unwind_entry (fun);
-
- if (u && u->stub_unwind.stub_type == IMPORT ||
- (!(u && u->stub_unwind.stub_type == IMPORT) && solib_handle))
-#endif /* 0 */
- if (solib_handle)
+ /* If we are calling into another load module then have sr4export call the
+ magic __d_plt_call routine which is linked in from end.o.
+
+ You can't use _sr4export to make the call as the value in sp-24 will get
+ fried and you end up returning to the wrong location. You can't call the
+ target as the code to bind the PLT entry to a function can't return to a
+ stack address.
+
+ Also, query the dynamic linker in the inferior to provide a suitable
+ PLABEL for the target function. */
+ if (!using_gcc_plt_call)
{
CORE_ADDR new_fun;
- /* Prefer __gcc_plt_call over the HP supplied routine because
- __gcc_plt_call works for any number of arguments. */
- trampoline = lookup_minimal_symbol ("__gcc_plt_call", NULL, NULL);
- if (trampoline == NULL)
- trampoline = lookup_minimal_symbol ("__d_plt_call", NULL, NULL);
+ /* Get a handle for the shared library containing FUN. Given the
+ handle we can query the shared library for a PLABEL. */
+ solib_handle = som_solib_get_solib_by_pc (fun);
- if (trampoline == NULL)
+ if (solib_handle)
{
- error ("Can't find an address for __d_plt_call or __gcc_plt_call trampoline\nSuggest linking executable with -g (links in /opt/langtools/lib/end.o)");
- }
- /* This is where sr4export will jump to. */
- new_fun = SYMBOL_VALUE_ADDRESS (trampoline);
+ struct minimal_symbol *fmsymbol = lookup_minimal_symbol_by_pc (fun);
- if (strcmp (SYMBOL_NAME (trampoline), "__d_plt_call") == 0)
- {
- /* if the function is in a shared library, but we have no import sub for
- it, we need to get the plabel from a call to __d_shl_get, which is a
- function in end.o. To call this function we need to set up various things */
-
- /* actually now we just use the plabel any time we make the call,
- because on 10.30 and 11.00 this is the only acceptable way. This also
- works fine for 10.20 */
- /* if (!(u && u->stub_unwind.stub_type == IMPORT) && solib_handle) */
- {
- struct minimal_symbol *fmsymbol = lookup_minimal_symbol_by_pc(fun);
-
- new_stub = find_stub_with_shl_get(fmsymbol, solib_handle);
-
- if (new_stub == NULL)
- error("Can't find an import stub for %s", SYMBOL_NAME(fmsymbol)); /* purecov: deadcode */
- }
+ trampoline = lookup_minimal_symbol ("__d_plt_call", NULL, NULL);
+
+ if (trampoline == NULL)
+ {
+ error ("Can't find an address for __d_plt_call or __gcc_plt_call trampoline\nSuggest linking executable with -g or compiling with gcc.");
+ }
+
+ /* This is where sr4export will jump to. */
+ new_fun = SYMBOL_VALUE_ADDRESS (trampoline);
+
+ /* If the function is in a shared library, then call __d_shl_get to
+ get a PLABEL for the target function. */
+ new_stub = find_stub_with_shl_get (fmsymbol, solib_handle);
+
+ if (new_stub == 0)
+ error ("Can't find an import stub for %s", DEPRECATED_SYMBOL_NAME (fmsymbol));
/* We have to store the address of the stub in __shlib_funcptr. */
- msymbol = lookup_minimal_symbol ("__shlib_funcptr", NULL,
- (struct objfile *)NULL);
- if (msymbol == NULL)
- error ("Can't find an address for __shlib_funcptr"); /* purecov: deadcode */
+ msymbol = lookup_minimal_symbol ("__shlib_funcptr", NULL,
+ (struct objfile *) NULL);
- /* if (new_stub != NULL) */
- target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol), (char *)&new_stub, 4);
- /* this is no longer used */
- /* else
- target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol), (char *)&fun, 4); */
+ if (msymbol == NULL)
+ error ("Can't find an address for __shlib_funcptr");
+ target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol),
+ (char *) &new_stub, 4);
/* We want sr4export to call __d_plt_call, so we claim it is
the final target. Clear trampoline. */
- fun = new_fun;
- trampoline = NULL;
+ fun = new_fun;
+ trampoline = NULL;
}
}
{
msymbol = lookup_minimal_symbol ("_sr4export", NULL, NULL);
if (msymbol == NULL)
- error ("Can't find an address for _sr4export trampoline"); /* purecov: deadcode */
+ error ("Can't find an address for _sr4export trampoline");
trampoline_addr = SYMBOL_VALUE_ADDRESS (msymbol);
}
if (flags & 2)
return pc;
#ifndef GDB_TARGET_IS_PA_ELF
- else if (som_solib_get_got_by_pc (target_read_pc (inferior_pid)))
+ else if (som_solib_get_got_by_pc (hppa_target_read_pc (inferior_ptid)))
return pc;
#endif
else
return dyncall_addr;
-
+#endif
}
-
-
-
/* If the pid is in a syscall, then the FP register is not readable.
We'll return zero in that case, rather than attempting to read it
and cause a warning. */
+
CORE_ADDR
-target_read_fp (pid)
- int pid;
+hppa_read_fp (int pid)
{
int flags = read_register (FLAGS_REGNUM);
- if (flags & 2) {
- return (CORE_ADDR) 0;
- }
+ if (flags & 2)
+ {
+ return (CORE_ADDR) 0;
+ }
/* This is the only site that may directly read_register () the FP
register. All others must use TARGET_READ_FP (). */
return read_register (FP_REGNUM);
}
+CORE_ADDR
+hppa_target_read_fp (void)
+{
+ return hppa_read_fp (PIDGET (inferior_ptid));
+}
/* Get the PC from %r31 if currently in a syscall. Also mask out privilege
bits. */
CORE_ADDR
-target_read_pc (pid)
- int pid;
+hppa_target_read_pc (ptid_t ptid)
{
- int flags = read_register_pid (FLAGS_REGNUM, pid);
+ int flags = read_register_pid (FLAGS_REGNUM, ptid);
/* The following test does not belong here. It is OS-specific, and belongs
in native code. */
/* Test SS_INSYSCALL */
if (flags & 2)
- return read_register_pid (31, pid) & ~0x3;
+ return read_register_pid (31, ptid) & ~0x3;
- return read_register_pid (PC_REGNUM, pid) & ~0x3;
+ return read_register_pid (PC_REGNUM, ptid) & ~0x3;
}
/* Write out the PC. If currently in a syscall, then also write the new
PC value into %r31. */
void
-target_write_pc (v, pid)
- CORE_ADDR v;
- int pid;
+hppa_target_write_pc (CORE_ADDR v, ptid_t ptid)
{
- int flags = read_register_pid (FLAGS_REGNUM, pid);
+ int flags = read_register_pid (FLAGS_REGNUM, ptid);
/* The following test does not belong here. It is OS-specific, and belongs
in native code. */
privilege bits set correctly. */
/* Test SS_INSYSCALL */
if (flags & 2)
- write_register_pid (31, v | 0x3, pid);
+ write_register_pid (31, v | 0x3, ptid);
- write_register_pid (PC_REGNUM, v, pid);
- write_register_pid (NPC_REGNUM, v + 4, pid);
+ write_register_pid (PC_REGNUM, v, ptid);
+ write_register_pid (NPC_REGNUM, v + 4, ptid);
}
/* return the alignment of a type in bytes. Structures have the maximum
alignment required by their fields. */
static int
-hppa_alignof (type)
- struct type *type;
+hppa_alignof (struct type *type)
{
int max_align, align, i;
CHECK_TYPEDEF (type);
{
/* Bit fields have no real alignment. */
/* if (!TYPE_FIELD_BITPOS (type, i)) */
- if (!TYPE_FIELD_BITSIZE (type, i)) /* elz: this should be bitsize */
+ if (!TYPE_FIELD_BITSIZE (type, i)) /* elz: this should be bitsize */
{
align = hppa_alignof (TYPE_FIELD_TYPE (type, i));
max_align = max (max_align, align);
/* Print the register regnum, or all registers if regnum is -1 */
void
-pa_do_registers_info (regnum, fpregs)
- int regnum;
- int fpregs;
+pa_do_registers_info (int regnum, int fpregs)
{
- char raw_regs [REGISTER_BYTES];
+ char raw_regs[REGISTER_BYTES];
int i;
/* Make a copy of gdb's save area (may cause actual
reads from the target). */
for (i = 0; i < NUM_REGS; i++)
- read_relative_register_raw_bytes (i, raw_regs + REGISTER_BYTE (i));
+ frame_register_read (deprecated_selected_frame, i, raw_regs + REGISTER_BYTE (i));
if (regnum == -1)
pa_print_registers (raw_regs, regnum, fpregs);
- else if (regnum < FP4_REGNUM) {
- long reg_val[2];
-
- /* Why is the value not passed through "extract_signed_integer"
- as in "pa_print_registers" below? */
- pa_register_look_aside(raw_regs, regnum, ®_val[0]);
-
- if(!is_pa_2) {
- printf_unfiltered ("%s %x\n", REGISTER_NAME (regnum), reg_val[1]);
- }
- else {
- /* Fancy % formats to prevent leading zeros. */
- if(reg_val[0] == 0)
- printf_unfiltered("%s %x\n", REGISTER_NAME (regnum), reg_val[1]);
+ else if (regnum < FP4_REGNUM)
+ {
+ long reg_val[2];
+
+ /* Why is the value not passed through "extract_signed_integer"
+ as in "pa_print_registers" below? */
+ pa_register_look_aside (raw_regs, regnum, ®_val[0]);
+
+ if (!is_pa_2)
+ {
+ printf_unfiltered ("%s %lx\n", REGISTER_NAME (regnum), reg_val[1]);
+ }
else
- printf_unfiltered("%s %x%8.8x\n", REGISTER_NAME (regnum),
- reg_val[0], reg_val[1]);
+ {
+ /* Fancy % formats to prevent leading zeros. */
+ if (reg_val[0] == 0)
+ printf_unfiltered ("%s %lx\n", REGISTER_NAME (regnum), reg_val[1]);
+ else
+ printf_unfiltered ("%s %lx%8.8lx\n", REGISTER_NAME (regnum),
+ reg_val[0], reg_val[1]);
+ }
}
- }
else
- /* Note that real floating point values only start at
- FP4_REGNUM. FP0 and up are just status and error
- registers, which have integral (bit) values. */
+ /* Note that real floating point values only start at
+ FP4_REGNUM. FP0 and up are just status and error
+ registers, which have integral (bit) values. */
pa_print_fp_reg (regnum);
}
/********** new function ********************/
void
-pa_do_strcat_registers_info (regnum, fpregs, stream, precision)
- int regnum;
- int fpregs;
- GDB_FILE *stream;
- enum precision_type precision;
+pa_do_strcat_registers_info (int regnum, int fpregs, struct ui_file *stream,
+ enum precision_type precision)
{
- char raw_regs [REGISTER_BYTES];
+ char raw_regs[REGISTER_BYTES];
int i;
/* Make a copy of gdb's save area (may cause actual
- reads from the target). */
+ reads from the target). */
for (i = 0; i < NUM_REGS; i++)
- read_relative_register_raw_bytes (i, raw_regs + REGISTER_BYTE (i));
+ frame_register_read (deprecated_selected_frame, i, raw_regs + REGISTER_BYTE (i));
if (regnum == -1)
pa_strcat_registers (raw_regs, regnum, fpregs, stream);
- else if (regnum < FP4_REGNUM) {
- long reg_val[2];
-
- /* Why is the value not passed through "extract_signed_integer"
- as in "pa_print_registers" below? */
- pa_register_look_aside(raw_regs, regnum, ®_val[0]);
+ else if (regnum < FP4_REGNUM)
+ {
+ long reg_val[2];
- if(!is_pa_2) {
- fprintf_unfiltered (stream, "%s %x", REGISTER_NAME (regnum), reg_val[1]);
- }
- else {
- /* Fancy % formats to prevent leading zeros. */
- if(reg_val[0] == 0)
- fprintf_unfiltered(stream, "%s %x", REGISTER_NAME (regnum),
- reg_val[1]);
+ /* Why is the value not passed through "extract_signed_integer"
+ as in "pa_print_registers" below? */
+ pa_register_look_aside (raw_regs, regnum, ®_val[0]);
+
+ if (!is_pa_2)
+ {
+ fprintf_unfiltered (stream, "%s %lx", REGISTER_NAME (regnum), reg_val[1]);
+ }
else
- fprintf_unfiltered(stream, "%s %x%8.8x", REGISTER_NAME (regnum),
- reg_val[0], reg_val[1]);
+ {
+ /* Fancy % formats to prevent leading zeros. */
+ if (reg_val[0] == 0)
+ fprintf_unfiltered (stream, "%s %lx", REGISTER_NAME (regnum),
+ reg_val[1]);
+ else
+ fprintf_unfiltered (stream, "%s %lx%8.8lx", REGISTER_NAME (regnum),
+ reg_val[0], reg_val[1]);
+ }
}
- }
else
- /* Note that real floating point values only start at
- FP4_REGNUM. FP0 and up are just status and error
- registers, which have integral (bit) values. */
+ /* Note that real floating point values only start at
+ FP4_REGNUM. FP0 and up are just status and error
+ registers, which have integral (bit) values. */
pa_strcat_fp_reg (regnum, stream, precision);
}
Note that reg_val is really expected to be an array of longs,
with two elements. */
static void
-pa_register_look_aside(raw_regs, regnum, raw_val)
- char *raw_regs;
- int regnum;
- long *raw_val;
+pa_register_look_aside (char *raw_regs, int regnum, long *raw_val)
{
- static int know_which = 0; /* False */
+ static int know_which = 0; /* False */
- int regaddr;
+ int regaddr;
unsigned int offset;
register int i;
- int start;
-
-
- char buf[MAX_REGISTER_RAW_SIZE];
+ int start;
+
+
+ char *buf = alloca (max_register_size (current_gdbarch));
long long reg_val;
- if(!know_which) {
- if(CPU_PA_RISC2_0 == sysconf(_SC_CPU_VERSION)) {
- is_pa_2 = (1==1);
- }
-
- know_which = 1; /* True */
- }
+ if (!know_which)
+ {
+ if (CPU_PA_RISC2_0 == sysconf (_SC_CPU_VERSION))
+ {
+ is_pa_2 = (1 == 1);
+ }
+
+ know_which = 1; /* True */
+ }
raw_val[0] = 0;
raw_val[1] = 0;
- if(!is_pa_2) {
- raw_val[1] = *(long *)(raw_regs + REGISTER_BYTE(regnum));
+ if (!is_pa_2)
+ {
+ raw_val[1] = *(long *) (raw_regs + REGISTER_BYTE (regnum));
return;
- }
+ }
/* Code below copied from hppah-nat.c, with fixes for wide
registers, using different area of save_state, etc. */
if (regnum == FLAGS_REGNUM || regnum >= FP0_REGNUM ||
- !HAVE_STRUCT_SAVE_STATE_T || !HAVE_STRUCT_MEMBER_SS_WIDE) {
+ !HAVE_STRUCT_SAVE_STATE_T || !HAVE_STRUCT_MEMBER_SS_WIDE)
+ {
/* Use narrow regs area of save_state and default macro. */
- offset = U_REGS_OFFSET;
- regaddr = register_addr(regnum, offset);
- start = 1;
- }
- else {
+ offset = U_REGS_OFFSET;
+ regaddr = register_addr (regnum, offset);
+ start = 1;
+ }
+ else
+ {
/* Use wide regs area, and calculate registers as 8 bytes wide.
We'd like to do this, but current version of "C" doesn't
permit "offsetof":
- offset = offsetof(save_state_t, ss_wide);
+ offset = offsetof(save_state_t, ss_wide);
Note that to avoid "C" doing typed pointer arithmetic, we
have to cast away the type in our offset calculation:
otherwise we get an offset of 1! */
+ /* NB: save_state_t is not available before HPUX 9.
+ The ss_wide field is not available previous to HPUX 10.20,
+ so to avoid compile-time warnings, we only compile this for
+ PA 2.0 processors. This control path should only be followed
+ if we're debugging a PA 2.0 processor, so this should not cause
+ problems. */
+
/* #if the following code out so that this file can still be
compiled on older HPUX boxes (< 10.20) which don't have
this structure/structure member. */
offset = ((int) &temp.ss_wide) - ((int) &temp);
regaddr = offset + regnum * 8;
- start = 0;
+ start = 0;
#endif
- }
-
- for(i = start; i < 2; i++)
+ }
+
+ for (i = start; i < 2; i++)
{
errno = 0;
- raw_val[i] = call_ptrace (PT_RUREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) regaddr, 0);
+ raw_val[i] = call_ptrace (PT_RUREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) regaddr, 0);
if (errno != 0)
{
/* Warning, not error, in case we are attached; sometimes the
regaddr += sizeof (long);
}
-
+
if (regnum == PCOQ_HEAD_REGNUM || regnum == PCOQ_TAIL_REGNUM)
- raw_val[1] &= ~0x3; /* I think we're masking out space bits */
+ raw_val[1] &= ~0x3; /* I think we're masking out space bits */
error_exit:
;
}
/* "Info all-reg" command */
-
+
static void
-pa_print_registers (raw_regs, regnum, fpregs)
- char *raw_regs;
- int regnum;
- int fpregs;
+pa_print_registers (char *raw_regs, int regnum, int fpregs)
{
- int i,j;
- long raw_val[2]; /* Alas, we are compiled so that "long long" is 32 bits */
+ int i, j;
+ /* Alas, we are compiled so that "long long" is 32 bits */
+ long raw_val[2];
long long_val;
+ int rows = 48, columns = 2;
- for (i = 0; i < 18; i++)
+ for (i = 0; i < rows; i++)
{
- for (j = 0; j < 4; j++)
+ for (j = 0; j < columns; j++)
{
- /* Q: Why is the value passed through "extract_signed_integer",
- while above, in "pa_do_registers_info" it isn't?
- A: ? */
- pa_register_look_aside(raw_regs, i+(j*18), &raw_val[0]);
-
- /* Even fancier % formats to prevent leading zeros
- and still maintain the output in columns. */
- if(!is_pa_2) {
- /* Being big-endian, on this machine the low bits
- (the ones we want to look at) are in the second longword. */
- long_val = extract_signed_integer (&raw_val[1], 4);
- printf_filtered ("%8.8s: %8x ",
- REGISTER_NAME (i+(j*18)), long_val);
- }
- else {
- /* raw_val = extract_signed_integer(&raw_val, 8); */
- if(raw_val[0] == 0)
- printf_filtered("%8.8s: %8x ",
- REGISTER_NAME (i+(j*18)), raw_val[1]);
- else
- printf_filtered("%8.8s: %8x%8.8x ", REGISTER_NAME (i+(j*18)),
- raw_val[0], raw_val[1]);
- }
+ /* We display registers in column-major order. */
+ int regnum = i + j * rows;
+
+ /* Q: Why is the value passed through "extract_signed_integer",
+ while above, in "pa_do_registers_info" it isn't?
+ A: ? */
+ pa_register_look_aside (raw_regs, regnum, &raw_val[0]);
+
+ /* Even fancier % formats to prevent leading zeros
+ and still maintain the output in columns. */
+ if (!is_pa_2)
+ {
+ /* Being big-endian, on this machine the low bits
+ (the ones we want to look at) are in the second longword. */
+ long_val = extract_signed_integer (&raw_val[1], 4);
+ printf_filtered ("%10.10s: %8lx ",
+ REGISTER_NAME (regnum), long_val);
+ }
+ else
+ {
+ /* raw_val = extract_signed_integer(&raw_val, 8); */
+ if (raw_val[0] == 0)
+ printf_filtered ("%10.10s: %8lx ",
+ REGISTER_NAME (regnum), raw_val[1]);
+ else
+ printf_filtered ("%10.10s: %8lx%8.8lx ",
+ REGISTER_NAME (regnum),
+ raw_val[0], raw_val[1]);
+ }
}
printf_unfiltered ("\n");
}
-
+
if (fpregs)
- for (i = FP4_REGNUM; i < NUM_REGS; i++) /* FP4_REGNUM == 72 */
+ for (i = FP4_REGNUM; i < NUM_REGS; i++) /* FP4_REGNUM == 72 */
pa_print_fp_reg (i);
}
-/************* new function ******************/
+/************* new function ******************/
static void
-pa_strcat_registers (raw_regs, regnum, fpregs, stream)
- char *raw_regs;
- int regnum;
- int fpregs;
- GDB_FILE *stream;
+pa_strcat_registers (char *raw_regs, int regnum, int fpregs,
+ struct ui_file *stream)
{
- int i,j;
- long raw_val[2]; /* Alas, we are compiled so that "long long" is 32 bits */
+ int i, j;
+ long raw_val[2]; /* Alas, we are compiled so that "long long" is 32 bits */
long long_val;
enum precision_type precision;
{
for (j = 0; j < 4; j++)
{
- /* Q: Why is the value passed through "extract_signed_integer",
- while above, in "pa_do_registers_info" it isn't?
- A: ? */
- pa_register_look_aside(raw_regs, i+(j*18), &raw_val[0]);
-
- /* Even fancier % formats to prevent leading zeros
- and still maintain the output in columns. */
- if(!is_pa_2) {
- /* Being big-endian, on this machine the low bits
- (the ones we want to look at) are in the second longword. */
- long_val = extract_signed_integer(&raw_val[1], 4);
- fprintf_filtered (stream, "%8.8s: %8x ", REGISTER_NAME (i+(j*18)), long_val);
- }
- else {
- /* raw_val = extract_signed_integer(&raw_val, 8); */
- if(raw_val[0] == 0)
- fprintf_filtered(stream, "%8.8s: %8x ", REGISTER_NAME (i+(j*18)),
- raw_val[1]);
- else
- fprintf_filtered(stream, "%8.8s: %8x%8.8x ", REGISTER_NAME (i+(j*18)),
- raw_val[0], raw_val[1]);
- }
+ /* Q: Why is the value passed through "extract_signed_integer",
+ while above, in "pa_do_registers_info" it isn't?
+ A: ? */
+ pa_register_look_aside (raw_regs, i + (j * 18), &raw_val[0]);
+
+ /* Even fancier % formats to prevent leading zeros
+ and still maintain the output in columns. */
+ if (!is_pa_2)
+ {
+ /* Being big-endian, on this machine the low bits
+ (the ones we want to look at) are in the second longword. */
+ long_val = extract_signed_integer (&raw_val[1], 4);
+ fprintf_filtered (stream, "%8.8s: %8lx ",
+ REGISTER_NAME (i + (j * 18)), long_val);
+ }
+ else
+ {
+ /* raw_val = extract_signed_integer(&raw_val, 8); */
+ if (raw_val[0] == 0)
+ fprintf_filtered (stream, "%8.8s: %8lx ",
+ REGISTER_NAME (i + (j * 18)), raw_val[1]);
+ else
+ fprintf_filtered (stream, "%8.8s: %8lx%8.8lx ",
+ REGISTER_NAME (i + (j * 18)), raw_val[0],
+ raw_val[1]);
+ }
}
fprintf_unfiltered (stream, "\n");
}
-
+
if (fpregs)
- for (i = FP4_REGNUM; i < NUM_REGS; i++) /* FP4_REGNUM == 72 */
+ for (i = FP4_REGNUM; i < NUM_REGS; i++) /* FP4_REGNUM == 72 */
pa_strcat_fp_reg (i, stream, precision);
}
static void
-pa_print_fp_reg (i)
- int i;
+pa_print_fp_reg (int i)
{
- char raw_buffer[MAX_REGISTER_RAW_SIZE];
- char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
+ char *raw_buffer = alloca (max_register_size (current_gdbarch));
+ char *virtual_buffer = alloca (max_register_size (current_gdbarch));
/* Get 32bits of data. */
- read_relative_register_raw_bytes (i, raw_buffer);
+ frame_register_read (deprecated_selected_frame, i, raw_buffer);
/* Put it in the buffer. No conversions are ever necessary. */
memcpy (virtual_buffer, raw_buffer, REGISTER_RAW_SIZE (i));
if ((i % 2) == 0)
{
/* Get the data in raw format for the 2nd half. */
- read_relative_register_raw_bytes (i + 1, raw_buffer);
+ frame_register_read (deprecated_selected_frame, i + 1, raw_buffer);
/* Copy it into the appropriate part of the virtual buffer. */
memcpy (virtual_buffer + REGISTER_RAW_SIZE (i), raw_buffer,
/*************** new function ***********************/
static void
-pa_strcat_fp_reg (i, stream, precision)
- int i;
- GDB_FILE *stream;
- enum precision_type precision;
+pa_strcat_fp_reg (int i, struct ui_file *stream, enum precision_type precision)
{
- char raw_buffer[MAX_REGISTER_RAW_SIZE];
- char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
+ char *raw_buffer = alloca (max_register_size (current_gdbarch));
+ char *virtual_buffer = alloca (max_register_size (current_gdbarch));
fputs_filtered (REGISTER_NAME (i), stream);
print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), stream);
/* Get 32bits of data. */
- read_relative_register_raw_bytes (i, raw_buffer);
+ frame_register_read (deprecated_selected_frame, i, raw_buffer);
/* Put it in the buffer. No conversions are ever necessary. */
memcpy (virtual_buffer, raw_buffer, REGISTER_RAW_SIZE (i));
if (precision == double_precision && (i % 2) == 0)
{
- char raw_buf[MAX_REGISTER_RAW_SIZE];
-
- /* Get the data in raw format for the 2nd half. */
- read_relative_register_raw_bytes (i + 1, raw_buf);
-
- /* Copy it into the appropriate part of the virtual buffer. */
- memcpy (virtual_buffer + REGISTER_RAW_SIZE(i), raw_buf, REGISTER_RAW_SIZE (i));
+ char *raw_buf = alloca (max_register_size (current_gdbarch));
- val_print (builtin_type_double, virtual_buffer, 0, 0 , stream, 0,
- 1, 0, Val_pretty_default);
+ /* Get the data in raw format for the 2nd half. */
+ frame_register_read (deprecated_selected_frame, i + 1, raw_buf);
+
+ /* Copy it into the appropriate part of the virtual buffer. */
+ memcpy (virtual_buffer + REGISTER_RAW_SIZE (i), raw_buf, REGISTER_RAW_SIZE (i));
+
+ val_print (builtin_type_double, virtual_buffer, 0, 0, stream, 0,
+ 1, 0, Val_pretty_default);
}
- else {
- val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, stream, 0,
- 1, 0, Val_pretty_default);
- }
+ else
+ {
+ val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, stream, 0,
+ 1, 0, Val_pretty_default);
+ }
}
just shared library trampolines (import, export). */
int
-in_solib_call_trampoline (pc, name)
- CORE_ADDR pc;
- char *name;
+hppa_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
struct minimal_symbol *minsym;
struct unwind_table_entry *u;
static CORE_ADDR dyncall = 0;
static CORE_ADDR sr4export = 0;
-/* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
- new exec file */
+#ifdef GDB_TARGET_IS_HPPA_20W
+ /* PA64 has a completely different stub/trampoline scheme. Is it
+ better? Maybe. It's certainly harder to determine with any
+ certainty that we are in a stub because we can not refer to the
+ unwinders to help.
+
+ The heuristic is simple. Try to lookup the current PC value in th
+ minimal symbol table. If that fails, then assume we are not in a
+ stub and return.
+
+ Then see if the PC value falls within the section bounds for the
+ section containing the minimal symbol we found in the first
+ step. If it does, then assume we are not in a stub and return.
+
+ Finally peek at the instructions to see if they look like a stub. */
+ {
+ struct minimal_symbol *minsym;
+ asection *sec;
+ CORE_ADDR addr;
+ int insn, i;
+
+ minsym = lookup_minimal_symbol_by_pc (pc);
+ if (! minsym)
+ return 0;
+
+ sec = SYMBOL_BFD_SECTION (minsym);
+
+ if (sec->vma <= pc
+ && sec->vma + sec->_cooked_size < pc)
+ return 0;
+
+ /* We might be in a stub. Peek at the instructions. Stubs are 3
+ instructions long. */
+ insn = read_memory_integer (pc, 4);
+
+ /* Find out where we think we are within the stub. */
+ if ((insn & 0xffffc00e) == 0x53610000)
+ addr = pc;
+ else if ((insn & 0xffffffff) == 0xe820d000)
+ addr = pc - 4;
+ else if ((insn & 0xffffc00e) == 0x537b0000)
+ addr = pc - 8;
+ else
+ return 0;
+
+ /* Now verify each insn in the range looks like a stub instruction. */
+ insn = read_memory_integer (addr, 4);
+ if ((insn & 0xffffc00e) != 0x53610000)
+ return 0;
+
+ /* Now verify each insn in the range looks like a stub instruction. */
+ insn = read_memory_integer (addr + 4, 4);
+ if ((insn & 0xffffffff) != 0xe820d000)
+ return 0;
+
+ /* Now verify each insn in the range looks like a stub instruction. */
+ insn = read_memory_integer (addr + 8, 4);
+ if ((insn & 0xffffc00e) != 0x537b0000)
+ return 0;
+
+ /* Looks like a stub. */
+ return 1;
+ }
+#endif
+
+ /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
+ new exec file */
/* First see if PC is in one of the two C-library trampolines. */
if (!dyncall)
if (pc == dyncall || pc == sr4export)
return 1;
+ minsym = lookup_minimal_symbol_by_pc (pc);
+ if (minsym && strcmp (DEPRECATED_SYMBOL_NAME (minsym), ".stub") == 0)
+ return 1;
+
/* Get the unwind descriptor corresponding to PC, return zero
if no unwind was found. */
u = find_unwind_entry (pc);
CORE_ADDR addr;
/* Search forward from the current PC until we hit a branch
- or the end of the stub. */
+ or the end of the stub. */
for (addr = pc; addr <= u->region_end; addr += 4)
{
unsigned long insn;
}
/* Should never happen. */
- warning ("Unable to find branch in parameter relocation stub.\n"); /* purecov: deadcode */
- return 0; /* purecov: deadcode */
+ warning ("Unable to find branch in parameter relocation stub.\n");
+ return 0;
}
/* Unknown stub type. For now, just return zero. */
- return 0; /* purecov: deadcode */
+ return 0;
}
/* Return one if PC is in the return path of a trampoline, else return zero.
just shared library trampolines (import, export). */
int
-in_solib_return_trampoline (pc, name)
- CORE_ADDR pc;
- char *name;
+hppa_in_solib_return_trampoline (CORE_ADDR pc, char *name)
{
struct unwind_table_entry *u;
CORE_ADDR addr;
/* Search forward from the current PC until we hit a branch
- or the end of the stub. */
+ or the end of the stub. */
for (addr = pc; addr <= u->region_end; addr += 4)
{
unsigned long insn;
}
/* Should never happen. */
- warning ("Unable to find branch in parameter relocation stub.\n"); /* purecov: deadcode */
- return 0; /* purecov: deadcode */
+ warning ("Unable to find branch in parameter relocation stub.\n");
+ return 0;
}
/* Unknown stub type. For now, just return zero. */
- return 0; /* purecov: deadcode */
+ return 0;
}
calling an argument relocation stub. It even handles some stubs
used in dynamic executables. */
-# if 0
-CORE_ADDR
-skip_trampoline_code (pc, name)
- CORE_ADDR pc;
- char *name;
-{
- return find_solib_trampoline_target(pc);
-}
-
-#endif
-
CORE_ADDR
-skip_trampoline_code (pc, name)
- CORE_ADDR pc;
- char *name;
+hppa_skip_trampoline_code (CORE_ADDR pc)
{
long orig_pc = pc;
long prev_inst, curr_inst, loc;
struct minimal_symbol *msym;
struct unwind_table_entry *u;
-
-/* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
- new exec file */
+ /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
+ new exec file */
if (!dyncall)
{
pc = (CORE_ADDR) read_register (22);
/* If bit 30 (counting from the left) is on, then pc is the address of
- the PLT entry for this function, not the address of the function
- itself. Bit 31 has meaning too, but only for MPE. */
+ the PLT entry for this function, not the address of the function
+ itself. Bit 31 has meaning too, but only for MPE. */
if (pc & 0x2)
- pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, 4);
+ pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, TARGET_PTR_BIT / 8);
}
if (pc == dyncall_external)
{
pc = (CORE_ADDR) read_register (22);
- pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, 4);
+ pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, TARGET_PTR_BIT / 8);
}
else if (pc == sr4export)
pc = (CORE_ADDR) (read_register (22));
its minimal symbol can be assigned type mst_solib_trampoline.
Also, if we find that the symbol is a real stub, then we fix the unwind
descriptor, and define the stub type to be EXPORT.
- Hopefully this is correct most of the times. */
+ Hopefully this is correct most of the times. */
if (u->stub_unwind.stub_type == 0)
- {
+ {
/* elz: NOTE (FIXME!) once the problem with the unwind information is fixed
we can delete all the code which appears between the lines */
/*--------------------------------------------------------------------------*/
- msym = lookup_minimal_symbol_by_pc (pc);
-
- if (msym == NULL || MSYMBOL_TYPE (msym) != mst_solib_trampoline)
- return orig_pc == pc ? 0 : pc & ~0x3;
-
- else if (msym != NULL && MSYMBOL_TYPE (msym) == mst_solib_trampoline)
- {
- struct objfile *objfile;
- struct minimal_symbol *msymbol;
- int function_found = 0;
-
- /* go look if there is another minimal symbol with the same name as
- this one, but with type mst_text. This would happen if the msym
- is an actual trampoline, in which case there would be another
- symbol with the same name corresponding to the real function */
-
- ALL_MSYMBOLS (objfile, msymbol)
- {
- if (MSYMBOL_TYPE (msymbol) == mst_text
- && STREQ (SYMBOL_NAME (msymbol) , SYMBOL_NAME (msym)))
- {
- function_found = 1;
- break;
- }
- }
-
- if (function_found)
- /* the type of msym is correct (mst_solib_trampoline), but
- the unwind info is wrong, so set it to the correct value */
- u->stub_unwind.stub_type = EXPORT;
- else
- /* the stub type info in the unwind is correct (this is not a
- trampoline), but the msym type information is wrong, it
- should be mst_text. So we need to fix the msym, and also
- get out of this function */
- {
- MSYMBOL_TYPE (msym) = mst_text;
- return orig_pc == pc ? 0 : pc & ~0x3;
- }
- }
-
+ msym = lookup_minimal_symbol_by_pc (pc);
+
+ if (msym == NULL || MSYMBOL_TYPE (msym) != mst_solib_trampoline)
+ return orig_pc == pc ? 0 : pc & ~0x3;
+
+ else if (msym != NULL && MSYMBOL_TYPE (msym) == mst_solib_trampoline)
+ {
+ struct objfile *objfile;
+ struct minimal_symbol *msymbol;
+ int function_found = 0;
+
+ /* go look if there is another minimal symbol with the same name as
+ this one, but with type mst_text. This would happen if the msym
+ is an actual trampoline, in which case there would be another
+ symbol with the same name corresponding to the real function */
+
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ if (MSYMBOL_TYPE (msymbol) == mst_text
+ && STREQ (DEPRECATED_SYMBOL_NAME (msymbol), DEPRECATED_SYMBOL_NAME (msym)))
+ {
+ function_found = 1;
+ break;
+ }
+ }
+
+ if (function_found)
+ /* the type of msym is correct (mst_solib_trampoline), but
+ the unwind info is wrong, so set it to the correct value */
+ u->stub_unwind.stub_type = EXPORT;
+ else
+ /* the stub type info in the unwind is correct (this is not a
+ trampoline), but the msym type information is wrong, it
+ should be mst_text. So we need to fix the msym, and also
+ get out of this function */
+ {
+ MSYMBOL_TYPE (msym) = mst_text;
+ return orig_pc == pc ? 0 : pc & ~0x3;
+ }
+ }
+
/*--------------------------------------------------------------------------*/
- }
+ }
/* It's a stub. Search for a branch and figure out where it goes.
Note we have to handle multi insn branch sequences like ldil;ble.
curr_inst = read_memory_integer (loc, 4);
/* Does it look like a branch external using %r1? Then it's the
- branch from the stub to the actual function. */
+ branch from the stub to the actual function. */
if ((curr_inst & 0xffe0e000) == 0xe0202000)
{
/* Yup. See if the previous instruction loaded
Does it look like a bve (r21)? (this is on PA2.0)
Does it look like a bve, n(r21)? (this is also on PA2.0)
That's the branch from an
- import stub to an export stub.
+ import stub to an export stub.
- It is impossible to determine the target of the branch via
- simple examination of instructions and/or data (consider
- that the address in the plabel may be the address of the
- bind-on-reference routine in the dynamic loader).
+ It is impossible to determine the target of the branch via
+ simple examination of instructions and/or data (consider
+ that the address in the plabel may be the address of the
+ bind-on-reference routine in the dynamic loader).
- So we have try an alternative approach.
+ So we have try an alternative approach.
- Get the name of the symbol at our current location; it should
- be a stub symbol with the same name as the symbol in the
- shared library.
+ Get the name of the symbol at our current location; it should
+ be a stub symbol with the same name as the symbol in the
+ shared library.
- Then lookup a minimal symbol with the same name; we should
- get the minimal symbol for the target routine in the shared
- library as those take precedence of import/export stubs. */
+ Then lookup a minimal symbol with the same name; we should
+ get the minimal symbol for the target routine in the shared
+ library as those take precedence of import/export stubs. */
if ((curr_inst == 0xe2a00000) ||
- (curr_inst == 0xe2a00002) ||
- (curr_inst == 0xeaa0d000) ||
- (curr_inst == 0xeaa0d002))
+ (curr_inst == 0xe2a00002) ||
+ (curr_inst == 0xeaa0d000) ||
+ (curr_inst == 0xeaa0d002))
{
struct minimal_symbol *stubsym, *libsym;
stubsym = lookup_minimal_symbol_by_pc (loc);
if (stubsym == NULL)
{
- warning ("Unable to find symbol for 0x%x", loc);
+ warning ("Unable to find symbol for 0x%lx", loc);
return orig_pc == pc ? 0 : pc & ~0x3;
}
- libsym = lookup_minimal_symbol (SYMBOL_NAME (stubsym), NULL, NULL);
+ libsym = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (stubsym), NULL, NULL);
if (libsym == NULL)
{
warning ("Unable to find library symbol for %s\n",
- SYMBOL_NAME (stubsym));
+ DEPRECATED_SYMBOL_NAME (stubsym));
return orig_pc == pc ? 0 : pc & ~0x3;
}
}
/* Does it look like bl X,%rp or bl X,%r0? Another way to do a
- branch from the stub to the actual function. */
- /*elz*/
+ branch from the stub to the actual function. */
+ /*elz */
else if ((curr_inst & 0xffe0e000) == 0xe8400000
|| (curr_inst & 0xffe0e000) == 0xe8000000
- || (curr_inst & 0xffe0e000) == 0xe800A000)
+ || (curr_inst & 0xffe0e000) == 0xe800A000)
return (loc + extract_17 (curr_inst) + 8) & ~0x3;
/* Does it look like bv (rp)? Note this depends on the
- current stack pointer being the same as the stack
- pointer in the stub itself! This is a branch on from the
- stub back to the original caller. */
- /*else if ((curr_inst & 0xffe0e000) == 0xe840c000)*/
+ current stack pointer being the same as the stack
+ pointer in the stub itself! This is a branch on from the
+ stub back to the original caller. */
+ /*else if ((curr_inst & 0xffe0e000) == 0xe840c000) */
else if ((curr_inst & 0xffe0f000) == 0xe840c000)
{
/* Yup. See if the previous instruction loaded
the PA2.0: BVE, n (rp) */
else if ((curr_inst & 0xffe0f000) == 0xe840d000)
{
- return (read_memory_integer
- (read_register (SP_REGNUM) - 24, 4)) & ~0x3;
+ return (read_memory_integer
+ (read_register (SP_REGNUM) - 24, TARGET_PTR_BIT / 8)) & ~0x3;
}
/* What about be,n 0(sr0,%rp)? It's just another way we return to
- the original caller from the stub. Used in dynamic executables. */
+ the original caller from the stub. Used in dynamic executables. */
else if (curr_inst == 0xe0400002)
{
/* The value we jump to is sitting in sp - 24. But that's
loaded several instructions before the be instruction.
I guess we could check for the previous instruction being
mtsp %r1,%sr0 if we want to do sanity checking. */
- return (read_memory_integer
- (read_register (SP_REGNUM) - 24, 4)) & ~0x3;
+ return (read_memory_integer
+ (read_register (SP_REGNUM) - 24, TARGET_PTR_BIT / 8)) & ~0x3;
}
/* Haven't found the branch yet, but we're still in the stub.
- Keep looking. */
+ Keep looking. */
loc += 4;
}
}
This only handles instructions commonly found in prologues. */
static int
-prologue_inst_adjust_sp (inst)
- unsigned long inst;
+prologue_inst_adjust_sp (unsigned long inst)
{
/* This must persist across calls. */
static int save_high21;
if ((inst & 0xffe00000) == 0x6fc00000)
return extract_14 (inst);
+ /* std,ma X,D(sp) */
+ if ((inst & 0xffe00008) == 0x73c00008)
+ return (inst & 0x1 ? -1 << 13 : 0) | (((inst >> 4) & 0x3ff) << 3);
+
/* addil high21,%r1; ldo low11,(%r1),%r30)
save high bits in save_high21 for later use. */
if ((inst & 0xffe00000) == 0x28200000)
/* Return nonzero if INST is a branch of some kind, else return zero. */
static int
-is_branch (inst)
- unsigned long inst;
+is_branch (unsigned long inst)
{
switch (inst >> 26)
{
case 0x21:
case 0x22:
case 0x23:
+ case 0x27:
case 0x28:
case 0x29:
case 0x2a:
case 0x2b:
+ case 0x2f:
case 0x30:
case 0x31:
case 0x32:
case 0x38:
case 0x39:
case 0x3a:
+ case 0x3b:
return 1;
default:
zero it INST does not save a GR. */
static int
-inst_saves_gr (inst)
- unsigned long inst;
+inst_saves_gr (unsigned long inst)
{
/* Does it look like a stw? */
- if ((inst >> 26) == 0x1a)
+ if ((inst >> 26) == 0x1a || (inst >> 26) == 0x1b
+ || (inst >> 26) == 0x1f
+ || ((inst >> 26) == 0x1f
+ && ((inst >> 6) == 0xa)))
+ return extract_5R_store (inst);
+
+ /* Does it look like a std? */
+ if ((inst >> 26) == 0x1c
+ || ((inst >> 26) == 0x03
+ && ((inst >> 6) & 0xf) == 0xb))
return extract_5R_store (inst);
/* Does it look like a stwm? GCC & HPC may use this in prologues. */
/* Does it look like sth or stb? HPC versions 9.0 and later use these
too. */
- if ((inst >> 26) == 0x19 || (inst >> 26) == 0x18)
+ if ((inst >> 26) == 0x19 || (inst >> 26) == 0x18
+ || ((inst >> 26) == 0x3
+ && (((inst >> 6) & 0xf) == 0x8
+ || (inst >> 6) & 0xf) == 0x9))
return extract_5R_store (inst);
-
+
return 0;
}
FIXME: What about argument stores with the HP compiler in ANSI mode? */
static int
-inst_saves_fr (inst)
- unsigned long inst;
+inst_saves_fr (unsigned long inst)
{
- /* is this an FSTDS ?*/
+ /* is this an FSTD ? */
if ((inst & 0xfc00dfc0) == 0x2c001200)
return extract_5r_store (inst);
- /* is this an FSTWS ?*/
+ if ((inst & 0xfc000002) == 0x70000002)
+ return extract_5R_store (inst);
+ /* is this an FSTW ? */
if ((inst & 0xfc00df80) == 0x24001200)
return extract_5r_store (inst);
+ if ((inst & 0xfc000002) == 0x7c000000)
+ return extract_5R_store (inst);
return 0;
}
CORE_ADDR
-skip_prologue_hard_way (pc)
- CORE_ADDR pc;
+skip_prologue_hard_way (CORE_ADDR pc)
{
char buf[4];
CORE_ADDR orig_pc = pc;
if (!u)
return pc;
- /* If we are not at the beginning of a function, then return now. */
+ /* If we are not at the beginning of a function, then return now. */
if ((pc & ~0x3) != u->region_start)
return pc;
unsigned long old_save_rp, old_save_sp, next_inst;
/* Save copies of all the triggers so we can compare them later
- (only for HPC). */
+ (only for HPC). */
old_save_gr = save_gr;
old_save_fr = save_fr;
old_save_rp = save_rp;
status = target_read_memory (pc, buf, 4);
inst = extract_unsigned_integer (buf, 4);
-
+
/* Yow! */
if (status != 0)
return pc;
/* Note the interesting effects of this instruction. */
stack_remaining -= prologue_inst_adjust_sp (inst);
- /* There is only one instruction used for saving RP into the stack. */
- if (inst == 0x6bc23fd9)
+ /* There are limited ways to store the return pointer into the
+ stack. */
+ if (inst == 0x6bc23fd9 || inst == 0x0fc212c1)
save_rp = 0;
- /* This is the only way we save SP into the stack. At this time
- the HP compilers never bother to save SP into the stack. */
- if ((inst & 0xffffc000) == 0x6fc10000)
+ /* These are the only ways we save SP into the stack. At this time
+ the HP compilers never bother to save SP into the stack. */
+ if ((inst & 0xffffc000) == 0x6fc10000
+ || (inst & 0xffffc00c) == 0x73c10008)
save_sp = 0;
+ /* Are we loading some register with an offset from the argument
+ pointer? */
+ if ((inst & 0xffe00000) == 0x37a00000
+ || (inst & 0xffffffe0) == 0x081d0240)
+ {
+ pc += 4;
+ continue;
+ }
+
/* Account for general and floating-point register saves. */
reg_num = inst_saves_gr (inst);
save_gr &= ~(1 << reg_num);
/* Ugh. Also account for argument stores into the stack.
- Unfortunately args_stored only tells us that some arguments
- where stored into the stack. Not how many or what kind!
+ Unfortunately args_stored only tells us that some arguments
+ where stored into the stack. Not how many or what kind!
- This is a kludge as on the HP compiler sets this bit and it
- never does prologue scheduling. So once we see one, skip past
- all of them. We have similar code for the fp arg stores below.
+ This is a kludge as on the HP compiler sets this bit and it
+ never does prologue scheduling. So once we see one, skip past
+ all of them. We have similar code for the fp arg stores below.
- FIXME. Can still die if we have a mix of GR and FR argument
- stores! */
- if (reg_num >= 23 && reg_num <= 26)
+ FIXME. Can still die if we have a mix of GR and FR argument
+ stores! */
+ if (reg_num >= (TARGET_PTR_BIT == 64 ? 19 : 23) && reg_num <= 26)
{
- while (reg_num >= 23 && reg_num <= 26)
+ while (reg_num >= (TARGET_PTR_BIT == 64 ? 19 : 23) && reg_num <= 26)
{
pc += 4;
status = target_read_memory (pc, buf, 4);
status = target_read_memory (pc + 4, buf, 4);
next_inst = extract_unsigned_integer (buf, 4);
-
+
/* Yow! */
if (status != 0)
return pc;
/* We've got to be read to handle the ldo before the fp register
- save. */
+ save. */
if ((inst & 0xfc000000) == 0x34000000
&& inst_saves_fr (next_inst) >= 4
- && inst_saves_fr (next_inst) <= 7)
+ && inst_saves_fr (next_inst) <= (TARGET_PTR_BIT == 64 ? 11 : 7))
{
/* So we drop into the code below in a reasonable state. */
reg_num = inst_saves_fr (next_inst);
}
/* Ugh. Also account for argument stores into the stack.
- This is a kludge as on the HP compiler sets this bit and it
- never does prologue scheduling. So once we see one, skip past
- all of them. */
- if (reg_num >= 4 && reg_num <= 7)
+ This is a kludge as on the HP compiler sets this bit and it
+ never does prologue scheduling. So once we see one, skip past
+ all of them. */
+ if (reg_num >= 4 && reg_num <= (TARGET_PTR_BIT == 64 ? 11 : 7))
{
- while (reg_num >= 4 && reg_num <= 7)
+ while (reg_num >= 4 && reg_num <= (TARGET_PTR_BIT == 64 ? 11 : 7))
{
pc += 8;
status = target_read_memory (pc, buf, 4);
}
/* Quit if we hit any kind of branch. This can happen if a prologue
- instruction is in the delay slot of the first call/branch. */
+ instruction is in the delay slot of the first call/branch. */
if (is_branch (inst))
break;
/* What a crock. The HP compilers set args_stored even if no
- arguments were stored into the stack (boo hiss). This could
- cause this code to then skip a bunch of user insns (up to the
- first branch).
-
- To combat this we try to identify when args_stored was bogusly
- set and clear it. We only do this when args_stored is nonzero,
- all other resources are accounted for, and nothing changed on
- this pass. */
+ arguments were stored into the stack (boo hiss). This could
+ cause this code to then skip a bunch of user insns (up to the
+ first branch).
+
+ To combat this we try to identify when args_stored was bogusly
+ set and clear it. We only do this when args_stored is nonzero,
+ all other resources are accounted for, and nothing changed on
+ this pass. */
if (args_stored
- && ! (save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
+ && !(save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
&& old_save_gr == save_gr && old_save_fr == save_fr
&& old_save_rp == save_rp && old_save_sp == save_sp
&& old_stack_remaining == stack_remaining)
break;
-
+
/* Bump the PC. */
pc += 4;
}
but never were, mask them out and restart.
This should only happen in optimized code, and should be very rare. */
- if (save_gr || (save_fr && ! (restart_fr || restart_gr)))
+ if (save_gr || (save_fr && !(restart_fr || restart_gr)))
{
pc = orig_pc;
restart_gr = save_gr;
}
-
-
-
-/* return 0 if we cannot determine the end of the prologue,
- return the new pc value if we know where the prologue ends */
+/* Return the address of the PC after the last prologue instruction if
+ we can determine it from the debug symbols. Else return zero. */
static CORE_ADDR
-after_prologue (pc)
- CORE_ADDR pc;
+after_prologue (CORE_ADDR pc)
{
struct symtab_and_line sal;
CORE_ADDR func_addr, func_end;
struct symbol *f;
+ /* If we can not find the symbol in the partial symbol table, then
+ there is no hope we can determine the function's start address
+ with this code. */
if (!find_pc_partial_function (pc, NULL, &func_addr, &func_end))
- return 0; /* Unknown */
-
- f = find_pc_function (pc);
- if (!f)
- return 0; /* no debug info, do it the hard way! */
+ return 0;
+ /* Get the line associated with FUNC_ADDR. */
sal = find_pc_line (func_addr, 0);
- if (sal.end < func_end)
- {
- /* this happens when the function has no prologue, because the way
- find_pc_line works: elz. Note: this may not be a very good
- way to decide whether a function has a prologue or not, but
- it is the best I can do with the info available
- Also, this will work for functions like: int f()
- {
- return 2;
- }
- I.e. the bp will be inserted at the first open brace.
- For functions where the body is only one line written like this:
- int f()
- { return 2; }
- this will make the breakpoint to be at the last brace, after the body
- has been executed already. What's the point of stepping through a function
- without any variables anyway?? */
-
- if ((SYMBOL_LINE(f) > 0) && (SYMBOL_LINE(f) < sal.line))
- return pc; /*no adjusment will be made*/
- else
- return sal.end; /* this is the end of the prologue */
- }
- /* The line after the prologue is after the end of the function. In this
- case, put the end of the prologue is the beginning of the function. */
- /* This should happen only when the function is prologueless and has no
- code in it. For instance void dumb(){} Note: this kind of function
- is used quite a lot in the test system */
+ /* There are only two cases to consider. First, the end of the source line
+ is within the function bounds. In that case we return the end of the
+ source line. Second is the end of the source line extends beyond the
+ bounds of the current function. We need to use the slow code to
+ examine instructions in that case.
- else return pc; /* no adjustment will be made */
+ Anything else is simply a bug elsewhere. Fixing it here is absolutely
+ the wrong thing to do. In fact, it should be entirely possible for this
+ function to always return zero since the slow instruction scanning code
+ is supposed to *always* work. If it does not, then it is a bug. */
+ if (sal.end < func_end)
+ return sal.end;
+ else
+ return 0;
}
/* To skip prologues, I use this predicate. Returns either PC itself
stuff some day. */
CORE_ADDR
-skip_prologue (pc)
- CORE_ADDR pc;
+hppa_skip_prologue (CORE_ADDR pc)
{
- unsigned long inst;
- int offset;
- CORE_ADDR post_prologue_pc;
- char buf[4];
-
-#ifdef GDB_TARGET_HAS_SHARED_LIBS
- /* Silently return the unaltered pc upon memory errors.
- This could happen on OSF/1 if decode_line_1 tries to skip the
- prologue for quickstarted shared library functions when the
- shared library is not yet mapped in.
- Reading target memory is slow over serial lines, so we perform
- this check only if the target has shared libraries. */
- if (target_read_memory (pc, buf, 4))
- return pc;
-#endif
-
- /* See if we can determine the end of the prologue via the symbol table.
- If so, then return either PC, or the PC after the prologue, whichever
- is greater. */
-
- post_prologue_pc = after_prologue (pc);
-
- if (post_prologue_pc != 0)
- return max (pc, post_prologue_pc);
-
-
- /* Can't determine prologue from the symbol table, (this can happen if there
- is no debug information) so we need to fall back on the old code, which
- looks at the instructions */
- /* FIXME (elz) !!!!: this may create a problem if, once the bp is hit, the user says
- where: the backtrace info is not right: this is because the point at which we
- break is at the very first instruction of the function. At this time the stuff that
- needs to be saved on the stack, has not been saved yet, so the backtrace
- cannot know all it needs to know. This will need to be fixed in the
- actual backtrace code. (Note: this is what DDE does) */
-
- else
-
- return (skip_prologue_hard_way(pc));
-
-#if 0
-/* elz: I am keeping this code around just in case, but remember, all the
- instructions are for alpha: you should change all to the hppa instructions */
-
- /* Can't determine prologue from the symbol table, need to examine
- instructions. */
+ unsigned long inst;
+ int offset;
+ CORE_ADDR post_prologue_pc;
+ char buf[4];
- /* Skip the typical prologue instructions. These are the stack adjustment
- instruction and the instructions that save registers on the stack
- or in the gcc frame. */
- for (offset = 0; offset < 100; offset += 4)
- {
- int status;
+ /* See if we can determine the end of the prologue via the symbol table.
+ If so, then return either PC, or the PC after the prologue, whichever
+ is greater. */
- status = read_memory_nobpt (pc + offset, buf, 4);
- if (status)
- memory_error (status, pc + offset);
- inst = extract_unsigned_integer (buf, 4);
+ post_prologue_pc = after_prologue (pc);
- /* The alpha has no delay slots. But let's keep the lenient stuff,
- we might need it for something else in the future. */
- if (lenient && 0)
- continue;
+ /* If after_prologue returned a useful address, then use it. Else
+ fall back on the instruction skipping code.
- if ((inst & 0xffff0000) == 0x27bb0000) /* ldah $gp,n($t12) */
- continue;
- if ((inst & 0xffff0000) == 0x23bd0000) /* lda $gp,n($gp) */
- continue;
- if ((inst & 0xffff0000) == 0x23de0000) /* lda $sp,n($sp) */
- continue;
- else if ((inst & 0xfc1f0000) == 0xb41e0000
- && (inst & 0xffff0000) != 0xb7fe0000)
- continue; /* stq reg,n($sp) */
- /* reg != $zero */
- else if ((inst & 0xfc1f0000) == 0x9c1e0000
- && (inst & 0xffff0000) != 0x9ffe0000)
- continue; /* stt reg,n($sp) */
- /* reg != $zero */
- else if (inst == 0x47de040f) /* bis sp,sp,fp */
- continue;
- else
- break;
- }
- return pc + offset;
-#endif /* 0 */
+ Some folks have claimed this causes problems because the breakpoint
+ may be the first instruction of the prologue. If that happens, then
+ the instruction skipping code has a bug that needs to be fixed. */
+ if (post_prologue_pc != 0)
+ return max (pc, post_prologue_pc);
+ else
+ return (skip_prologue_hard_way (pc));
}
/* Put here the code to store, into a struct frame_saved_regs,
the address we return for it IS the sp for the next frame. */
void
-hppa_frame_find_saved_regs (frame_info, frame_saved_regs)
- struct frame_info *frame_info;
- struct frame_saved_regs *frame_saved_regs;
+hppa_frame_find_saved_regs (struct frame_info *frame_info,
+ struct frame_saved_regs *frame_saved_regs)
{
CORE_ADDR pc;
struct unwind_table_entry *u;
int status, i, reg;
char buf[4];
int fp_loc = -1;
+ int final_iteration;
/* Zero out everything. */
memset (frame_saved_regs, '\0', sizeof (struct frame_saved_regs));
instead, let find_dummy_frame_regs fill in the correct offsets
for the saved registers. */
if ((frame_info->pc >= frame_info->frame
- && frame_info->pc <= (frame_info->frame + CALL_DUMMY_LENGTH
- + 32 * 4 + (NUM_REGS - FP0_REGNUM) * 8
- + 6 * 4)))
+ && frame_info->pc <= (frame_info->frame
+ /* A call dummy is sized in words, but it is
+ actually a series of instructions. Account
+ for that scaling factor. */
+ + ((REGISTER_SIZE / INSTRUCTION_SIZE)
+ * CALL_DUMMY_LENGTH)
+ /* Similarly we have to account for 64bit
+ wide register saves. */
+ + (32 * REGISTER_SIZE)
+ /* We always consider FP regs 8 bytes long. */
+ + (NUM_REGS - FP0_REGNUM) * 8
+ /* Similarly we have to account for 64bit
+ wide register saves. */
+ + (6 * REGISTER_SIZE))))
find_dummy_frame_regs (frame_info, frame_saved_regs);
/* Interrupt handlers are special too. They lay out the register
/* SP is a little special. */
if (i == SP_REGNUM)
frame_saved_regs->regs[SP_REGNUM]
- = read_memory_integer (frame_info->frame + SP_REGNUM * 4, 4);
+ = read_memory_integer (frame_info->frame + SP_REGNUM * 4,
+ TARGET_PTR_BIT / 8);
else
frame_saved_regs->regs[i] = frame_info->frame + i * 4;
}
#ifdef FRAME_FIND_SAVED_REGS_IN_SIGTRAMP
/* Handle signal handler callers. */
- if (frame_info->signal_handler_caller)
+ if ((get_frame_type (frame_info) == SIGTRAMP_FRAME))
{
FRAME_FIND_SAVED_REGS_IN_SIGTRAMP (frame_info, frame_saved_regs);
return;
/* Get the starting address of the function referred to by the PC
saved in frame. */
- pc = get_pc_function_start (frame_info->pc);
+ pc = get_frame_func (frame_info);
/* Yow! */
u = find_unwind_entry (pc);
For unoptimized GCC code and for any HP CC code this will never ever
examine any user instructions.
- For optimzied GCC code we're faced with problems. GCC will schedule
+ For optimized GCC code we're faced with problems. GCC will schedule
its prologue and make prologue instructions available for delay slot
filling. The end result is user code gets mixed in with the prologue
and a prologue instruction may be in the delay slot of the first branch
Some unexpected things are expected with debugging optimized code, so
we allow this routine to walk past user instructions in optimized
GCC code. */
- while (save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
+ final_iteration = 0;
+ while ((save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
+ && pc <= frame_info->pc)
{
status = target_read_memory (pc, buf, 4);
inst = extract_unsigned_integer (buf, 4);
/* Note the interesting effects of this instruction. */
stack_remaining -= prologue_inst_adjust_sp (inst);
- /* There is only one instruction used for saving RP into the stack. */
- if (inst == 0x6bc23fd9)
+ /* There are limited ways to store the return pointer into the
+ stack. */
+ if (inst == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
{
save_rp = 0;
frame_saved_regs->regs[RP_REGNUM] = frame_info->frame - 20;
}
+ else if (inst == 0x0fc212c1) /* std rp,-0x10(sr0,sp) */
+ {
+ save_rp = 0;
+ frame_saved_regs->regs[RP_REGNUM] = frame_info->frame - 16;
+ }
- /* Just note that we found the save of SP into the stack. The
- value for frame_saved_regs was computed above. */
- if ((inst & 0xffffc000) == 0x6fc10000)
- save_sp = 0;
+ /* Note if we saved SP into the stack. This also happens to indicate
+ the location of the saved frame pointer. */
+ if ( (inst & 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */
+ || (inst & 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
+ {
+ frame_saved_regs->regs[FP_REGNUM] = frame_info->frame;
+ save_sp = 0;
+ }
/* Account for general and floating-point register saves. */
reg = inst_saves_gr (inst);
if ((inst >> 26) == 0x1b
&& extract_14 (inst) >= 0)
frame_saved_regs->regs[reg] = frame_info->frame;
+ /* A std has explicit post_modify forms. */
+ else if ((inst & 0xfc00000c0) == 0x70000008)
+ frame_saved_regs->regs[reg] = frame_info->frame;
else
{
+ CORE_ADDR offset;
+
+ if ((inst >> 26) == 0x1c)
+ offset = (inst & 0x1 ? -1 << 13 : 0) | (((inst >> 4) & 0x3ff) << 3);
+ else if ((inst >> 26) == 0x03)
+ offset = low_sign_extend (inst & 0x1f, 5);
+ else
+ offset = extract_14 (inst);
+
/* Handle code with and without frame pointers. */
if (u->Save_SP)
frame_saved_regs->regs[reg]
- = frame_info->frame + extract_14 (inst);
+ = frame_info->frame + offset;
else
frame_saved_regs->regs[reg]
- = frame_info->frame + (u->Total_frame_size << 3)
- + extract_14 (inst);
+ = (frame_info->frame + (u->Total_frame_size << 3)
+ + offset);
}
}
/* GCC handles callee saved FP regs a little differently.
- It emits an instruction to put the value of the start of
- the FP store area into %r1. It then uses fstds,ma with
- a basereg of %r1 for the stores.
+ It emits an instruction to put the value of the start of
+ the FP store area into %r1. It then uses fstds,ma with
+ a basereg of %r1 for the stores.
- HP CC emits them at the current stack pointer modifying
- the stack pointer as it stores each register. */
+ HP CC emits them at the current stack pointer modifying
+ the stack pointer as it stores each register. */
/* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
if ((inst & 0xffffc000) == 0x34610000
|| (inst & 0xffffc000) == 0x37c10000)
fp_loc = extract_14 (inst);
-
+
reg = inst_saves_fr (inst);
if (reg >= 12 && reg <= 21)
{
if (fp_loc == -1)
{
/* 1st HP CC FP register store. After this instruction
- we've set enough state that the GCC and HPCC code are
- both handled in the same manner. */
+ we've set enough state that the GCC and HPCC code are
+ both handled in the same manner. */
frame_saved_regs->regs[reg + FP4_REGNUM + 4] = frame_info->frame;
fp_loc = 8;
}
}
}
- /* Quit if we hit any kind of branch. This can happen if a prologue
- instruction is in the delay slot of the first call/branch. */
- if (is_branch (inst))
+ /* Quit if we hit any kind of branch the previous iteration. */
+ if (final_iteration)
break;
+ /* We want to look precisely one instruction beyond the branch
+ if we have not found everything yet. */
+ if (is_branch (inst))
+ final_iteration = 1;
+
/* Bump the PC. */
pc += 4;
}
exception event has occurred. */
/* The name of the hook to be set to point to the callback function */
-static char HP_ACC_EH_notify_hook[] = "__eh_notify_hook";
-/* The name of the function to be used to set the hook value */
-static char HP_ACC_EH_set_hook_value[] = "__eh_set_hook_value";
-/* The name of the callback function in end.o */
+static char HP_ACC_EH_notify_hook[] = "__eh_notify_hook";
+/* The name of the function to be used to set the hook value */
+static char HP_ACC_EH_set_hook_value[] = "__eh_set_hook_value";
+/* The name of the callback function in end.o */
static char HP_ACC_EH_notify_callback[] = "__d_eh_notify_callback";
-/* Name of function in end.o on which a break is set (called by above) */
-static char HP_ACC_EH_break[] = "__d_eh_break";
-/* Name of flag (in end.o) that enables catching throws */
-static char HP_ACC_EH_catch_throw[] = "__d_eh_catch_throw";
-/* Name of flag (in end.o) that enables catching catching */
-static char HP_ACC_EH_catch_catch[] = "__d_eh_catch_catch";
-/* The enum used by aCC */
-typedef enum {
- __EH_NOTIFY_THROW,
- __EH_NOTIFY_CATCH
-} __eh_notification;
+/* Name of function in end.o on which a break is set (called by above) */
+static char HP_ACC_EH_break[] = "__d_eh_break";
+/* Name of flag (in end.o) that enables catching throws */
+static char HP_ACC_EH_catch_throw[] = "__d_eh_catch_throw";
+/* Name of flag (in end.o) that enables catching catching */
+static char HP_ACC_EH_catch_catch[] = "__d_eh_catch_catch";
+/* The enum used by aCC */
+typedef enum
+ {
+ __EH_NOTIFY_THROW,
+ __EH_NOTIFY_CATCH
+ }
+__eh_notification;
/* Is exception-handling support available with this executable? */
static int hp_cxx_exception_support = 0;
/* Similar to above, but imported from breakpoint.c -- non-target-specific */
extern int exception_support_initialized;
/* Address of __eh_notify_hook */
-static CORE_ADDR eh_notify_hook_addr = NULL;
+static CORE_ADDR eh_notify_hook_addr = 0;
/* Address of __d_eh_notify_callback */
-static CORE_ADDR eh_notify_callback_addr = NULL;
+static CORE_ADDR eh_notify_callback_addr = 0;
/* Address of __d_eh_break */
-static CORE_ADDR eh_break_addr = NULL;
+static CORE_ADDR eh_break_addr = 0;
/* Address of __d_eh_catch_catch */
-static CORE_ADDR eh_catch_catch_addr = NULL;
+static CORE_ADDR eh_catch_catch_addr = 0;
/* Address of __d_eh_catch_throw */
-static CORE_ADDR eh_catch_throw_addr = NULL;
+static CORE_ADDR eh_catch_throw_addr = 0;
/* Sal for __d_eh_break */
-static struct symtab_and_line * break_callback_sal = NULL;
+static struct symtab_and_line *break_callback_sal = 0;
/* Code in end.c expects __d_pid to be set in the inferior,
otherwise __d_eh_notify_callback doesn't bother to call
__d_eh_break! So we poke the pid into this symbol
ourselves.
0 => success
- 1 => failure */
+ 1 => failure */
int
-setup_d_pid_in_inferior ()
+setup_d_pid_in_inferior (void)
{
CORE_ADDR anaddr;
- struct minimal_symbol * msymbol;
- char buf[4]; /* FIXME 32x64? */
-
+ struct minimal_symbol *msymbol;
+ char buf[4]; /* FIXME 32x64? */
+
/* Slam the pid of the process into __d_pid; failing is only a warning! */
msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile);
if (msymbol == NULL)
}
anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
- store_unsigned_integer (buf, 4, inferior_pid); /* FIXME 32x64? */
- if (target_write_memory (anaddr, buf, 4)) /* FIXME 32x64? */
+ store_unsigned_integer (buf, 4, PIDGET (inferior_ptid)); /* FIXME 32x64? */
+ if (target_write_memory (anaddr, buf, 4)) /* FIXME 32x64? */
{
warning ("Unable to write __d_pid");
warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
point to the required debug function
Return 0 => failure
- 1 => success */
+ 1 => success */
static int
-initialize_hp_cxx_exception_support ()
+initialize_hp_cxx_exception_support (void)
{
struct symtabs_and_lines sals;
- struct cleanup * old_chain;
- struct cleanup * canonical_strings_chain = NULL;
+ struct cleanup *old_chain;
+ struct cleanup *canonical_strings_chain = NULL;
int i;
- char * addr_start;
- char * addr_end = NULL;
- char ** canonical = (char **) NULL;
+ char *addr_start;
+ char *addr_end = NULL;
+ char **canonical = (char **) NULL;
int thread = -1;
- struct symbol * sym = NULL;
- struct minimal_symbol * msym = NULL;
- struct objfile * objfile;
+ struct symbol *sym = NULL;
+ struct minimal_symbol *msym = NULL;
+ struct objfile *objfile;
asection *shlib_info;
/* Detect and disallow recursion. On HP-UX with aCC, infinite
callbacks involves making a call in the inferior, which means
re-inserting breakpoints which can re-invoke this code */
- static int recurse = 0;
- if (recurse > 0)
+ static int recurse = 0;
+ if (recurse > 0)
{
hp_cxx_exception_support_initialized = 0;
exception_support_initialized = 0;
will decide to try the g++ exception-handling support instead. */
if (!hp_som_som_object_present)
return 0;
-
+
/* We have a SOM executable with SOM debug info; find the hooks */
/* First look for the notify hook provided by aCC runtime libs */
If this symbol is found but the other symbols we require are
not found, there is something weird going on, and g++ support
should *not* be tried as an alternative.
-
+
ASSUMPTION: Only HP aCC code will have __eh_notify_hook defined.
ASSUMPTION: HP aCC and g++ modules cannot be linked together. */
-
+
/* libCsup has this hook; it'll usually be non-debuggable */
msym = lookup_minimal_symbol (HP_ACC_EH_notify_hook, NULL, NULL);
if (msym)
{
eh_notify_hook_addr = SYMBOL_VALUE_ADDRESS (msym);
hp_cxx_exception_support = 1;
- }
+ }
else
{
warning ("Unable to find exception callback hook (%s).", HP_ACC_EH_notify_hook);
return 0;
}
-#if 0 /* DEBUGGING */
- printf ("Hook addr found is %lx\n", eh_notify_hook_addr);
-#endif
-
/* Next look for the notify callback routine in end.o */
- /* This is always available in the SOM symbol dictionary if end.o is linked in */
+ /* This is always available in the SOM symbol dictionary if end.o is linked in */
msym = lookup_minimal_symbol (HP_ACC_EH_notify_callback, NULL, NULL);
if (msym)
{
eh_notify_callback_addr = SYMBOL_VALUE_ADDRESS (msym);
hp_cxx_exception_support = 1;
- }
- else
+ }
+ else
{
warning ("Unable to find exception callback routine (%s).", HP_ACC_EH_notify_callback);
warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
return 0;
}
+#ifndef GDB_TARGET_IS_HPPA_20W
/* Check whether the executable is dynamically linked or archive bound */
/* With an archive-bound executable we can use the raw addresses we find
for the callback function, etc. without modification. For an executable
can be the target of a call through $$dyncall from the aCC runtime support
library (libCsup) which is linked shared by default by aCC. */
/* This test below was copied from somsolib.c/somread.c. It may not be a very
- reliable one to test that an executable is linked shared. pai/1997-07-18 */
+ reliable one to test that an executable is linked shared. pai/1997-07-18 */
shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$");
if (shlib_info && (bfd_section_size (symfile_objfile->obfd, shlib_info) != 0))
{
plabel that can be used by an inter-load-module call. */
/* Find solib handle for main image (which has end.o), and use that
and the min sym as arguments to __d_shl_get() (which does the equivalent
- of shl_findsym()) to find the plabel. */
+ of shl_findsym()) to find the plabel. */
args_for_find_stub args;
static char message[] = "Error while finding exception callback hook:\n";
-
+
args.solib_handle = som_solib_get_solib_by_pc (eh_notify_callback_addr);
args.msym = msym;
-
+ args.return_val = 0;
+
recurse++;
- eh_notify_callback_addr = catch_errors ((int (*) PARAMS ((char *))) cover_find_stub_with_shl_get,
- (char *) &args,
- message, RETURN_MASK_ALL);
+ catch_errors (cover_find_stub_with_shl_get, &args, message,
+ RETURN_MASK_ALL);
+ eh_notify_callback_addr = args.return_val;
recurse--;
-
-#if 0 /* DEBUGGING */
- printf ("found plabel for eh notify callback: %x\n", eh_notify_callback_addr);
-#endif
exception_catchpoints_are_fragile = 1;
-
+
if (!eh_notify_callback_addr)
- {
- /* We can get here either if there is no plabel in the export list
- for the main image, or if something strange happened (??) */
- warning ("Couldn't find a plabel (indirect function label) for the exception callback.");
- warning ("GDB will not be able to intercept exception events.");
- return 0;
- }
+ {
+ /* We can get here either if there is no plabel in the export list
+ for the main image, or if something strange happened (?) */
+ warning ("Couldn't find a plabel (indirect function label) for the exception callback.");
+ warning ("GDB will not be able to intercept exception events.");
+ return 0;
+ }
}
else
exception_catchpoints_are_fragile = 0;
-
-#if 0 /* DEBUGGING */
- printf ("Cb addr found is %lx\n", eh_notify_callback_addr);
#endif
/* Now, look for the breakpointable routine in end.o */
- /* This should also be available in the SOM symbol dict. if end.o linked in */
+ /* This should also be available in the SOM symbol dict. if end.o linked in */
msym = lookup_minimal_symbol (HP_ACC_EH_break, NULL, NULL);
if (msym)
{
eh_break_addr = SYMBOL_VALUE_ADDRESS (msym);
hp_cxx_exception_support = 1;
- }
+ }
else
{
warning ("Unable to find exception callback routine to set breakpoint (%s).", HP_ACC_EH_break);
return 0;
}
-#if 0 /* DEBUGGING */
- printf ("break addr found is %lx\n", eh_break_addr);
-#endif
-
/* Next look for the catch enable flag provided in end.o */
sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL,
- VAR_NAMESPACE, 0, (struct symtab **) NULL);
- if (sym) /* sometimes present in debug info */
+ VAR_NAMESPACE, 0, (struct symtab **) NULL);
+ if (sym) /* sometimes present in debug info */
{
eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (sym);
hp_cxx_exception_support = 1;
}
- else /* otherwise look in SOM symbol dict. */
+ else
+ /* otherwise look in SOM symbol dict. */
{
msym = lookup_minimal_symbol (HP_ACC_EH_catch_catch, NULL, NULL);
if (msym)
- {
- eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (msym);
- hp_cxx_exception_support = 1;
- }
+ {
+ eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (msym);
+ hp_cxx_exception_support = 1;
+ }
else
- {
- warning ("Unable to enable interception of exception catches.");
- warning ("Executable may not have been compiled debuggable with HP aCC.");
- warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
- return 0;
- }
+ {
+ warning ("Unable to enable interception of exception catches.");
+ warning ("Executable may not have been compiled debuggable with HP aCC.");
+ warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
+ return 0;
+ }
}
-#if 0 /* DEBUGGING */
- printf ("catch catch addr found is %lx\n", eh_catch_catch_addr);
-#endif
-
/* Next look for the catch enable flag provided end.o */
sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL,
- VAR_NAMESPACE, 0, (struct symtab **) NULL);
- if (sym) /* sometimes present in debug info */
+ VAR_NAMESPACE, 0, (struct symtab **) NULL);
+ if (sym) /* sometimes present in debug info */
{
eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (sym);
hp_cxx_exception_support = 1;
}
- else /* otherwise look in SOM symbol dict. */
+ else
+ /* otherwise look in SOM symbol dict. */
{
msym = lookup_minimal_symbol (HP_ACC_EH_catch_throw, NULL, NULL);
if (msym)
- {
- eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (msym);
- hp_cxx_exception_support = 1;
- }
+ {
+ eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (msym);
+ hp_cxx_exception_support = 1;
+ }
else
- {
- warning ("Unable to enable interception of exception throws.");
- warning ("Executable may not have been compiled debuggable with HP aCC.");
- warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
- return 0;
- }
+ {
+ warning ("Unable to enable interception of exception throws.");
+ warning ("Executable may not have been compiled debuggable with HP aCC.");
+ warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
+ return 0;
+ }
}
-#if 0 /* DEBUGGING */
- printf ("catch throw addr found is %lx\n", eh_catch_throw_addr);
-#endif
-
- /* Set the flags */
- hp_cxx_exception_support = 2; /* everything worked so far */
+ /* Set the flags */
+ hp_cxx_exception_support = 2; /* everything worked so far */
hp_cxx_exception_support_initialized = 1;
exception_support_initialized = 1;
Return value is NULL if no support found;
-1 if something went wrong,
or a pointer to a symtab/line struct if the breakpointable
- address was found. */
+ address was found. */
-struct symtab_and_line *
-child_enable_exception_callback (kind, enable)
- enum exception_event_kind kind;
- int enable;
+struct symtab_and_line *
+child_enable_exception_callback (enum exception_event_kind kind, int enable)
{
char buf[4];
switch (hp_cxx_exception_support)
{
- case 0:
- /* Assuming no HP support at all */
- return NULL;
- case 1:
- /* HP support should be present, but something went wrong */
- return (struct symtab_and_line *) -1; /* yuck! */
- /* there may be other cases in the future */
+ case 0:
+ /* Assuming no HP support at all */
+ return NULL;
+ case 1:
+ /* HP support should be present, but something went wrong */
+ return (struct symtab_and_line *) -1; /* yuck! */
+ /* there may be other cases in the future */
}
-
+
/* Set the EH hook to point to the callback routine */
- store_unsigned_integer (buf, 4, enable ? eh_notify_callback_addr : 0); /* FIXME 32x64 problem */
+ store_unsigned_integer (buf, 4, enable ? eh_notify_callback_addr : 0); /* FIXME 32x64 problem */
/* pai: (temp) FIXME should there be a pack operation first? */
- if (target_write_memory (eh_notify_hook_addr, buf, 4)) /* FIXME 32x64 problem */
+ if (target_write_memory (eh_notify_hook_addr, buf, 4)) /* FIXME 32x64 problem */
{
warning ("Could not write to target memory for exception event callback.");
warning ("Interception of exception events may not work.");
- return (struct symtab_and_line *) -1;
+ return (struct symtab_and_line *) -1;
}
if (enable)
{
- /* Ensure that __d_pid is set up correctly -- end.c code checks this. :-(*/
- if (inferior_pid > 0)
- {
- if (setup_d_pid_in_inferior ())
- return (struct symtab_and_line *) -1;
- }
+ /* Ensure that __d_pid is set up correctly -- end.c code checks this. :-( */
+ if (PIDGET (inferior_ptid) > 0)
+ {
+ if (setup_d_pid_in_inferior ())
+ return (struct symtab_and_line *) -1;
+ }
else
- {
- warning ("Internal error: Invalid inferior pid? Cannot intercept exception events."); /* purecov: deadcode */
- return (struct symtab_and_line *) -1; /* purecov: deadcode */
- }
+ {
+ warning ("Internal error: Invalid inferior pid? Cannot intercept exception events.");
+ return (struct symtab_and_line *) -1;
+ }
}
-
+
switch (kind)
{
- case EX_EVENT_THROW:
- store_unsigned_integer (buf, 4, enable ? 1 : 0);
- if (target_write_memory (eh_catch_throw_addr, buf, 4)) /* FIXME 32x64? */
- {
- warning ("Couldn't enable exception throw interception.");
- return (struct symtab_and_line *) -1;
- }
- break;
- case EX_EVENT_CATCH:
- store_unsigned_integer (buf, 4, enable ? 1 : 0);
- if (target_write_memory (eh_catch_catch_addr, buf, 4)) /* FIXME 32x64? */
- {
- warning ("Couldn't enable exception catch interception.");
- return (struct symtab_and_line *) -1;
- }
- break;
- default: /* purecov: deadcode */
- error ("Request to enable unknown or unsupported exception event."); /* purecov: deadcode */
+ case EX_EVENT_THROW:
+ store_unsigned_integer (buf, 4, enable ? 1 : 0);
+ if (target_write_memory (eh_catch_throw_addr, buf, 4)) /* FIXME 32x64? */
+ {
+ warning ("Couldn't enable exception throw interception.");
+ return (struct symtab_and_line *) -1;
+ }
+ break;
+ case EX_EVENT_CATCH:
+ store_unsigned_integer (buf, 4, enable ? 1 : 0);
+ if (target_write_memory (eh_catch_catch_addr, buf, 4)) /* FIXME 32x64? */
+ {
+ warning ("Couldn't enable exception catch interception.");
+ return (struct symtab_and_line *) -1;
+ }
+ break;
+ default:
+ error ("Request to enable unknown or unsupported exception event.");
}
-
+
/* Copy break address into new sal struct, malloc'ing if needed. */
if (!break_callback_sal)
{
break_callback_sal = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line));
}
- INIT_SAL(break_callback_sal);
+ init_sal (break_callback_sal);
break_callback_sal->symtab = NULL;
break_callback_sal->pc = eh_break_addr;
break_callback_sal->line = 0;
break_callback_sal->end = eh_break_addr;
-
+
return break_callback_sal;
}
-/* Record some information about the current exception event */
+/* Record some information about the current exception event */
static struct exception_event_record current_ex_event;
-/* Convenience struct */
-static struct symtab_and_line null_symtab_and_line = { NULL, 0, 0, 0 };
+/* Convenience struct */
+static struct symtab_and_line null_symtab_and_line =
+{NULL, 0, 0, 0};
/* Report current exception event. Returns a pointer to a record
that describes the kind of the event, where it was thrown from,
and where it will be caught. More information may be reported
- in the future */
+ in the future */
struct exception_event_record *
-child_get_current_exception_event ()
+child_get_current_exception_event (void)
{
- CORE_ADDR event_kind;
- CORE_ADDR throw_addr;
- CORE_ADDR catch_addr;
+ CORE_ADDR event_kind;
+ CORE_ADDR throw_addr;
+ CORE_ADDR catch_addr;
struct frame_info *fi, *curr_frame;
int level = 1;
- curr_frame = get_current_frame();
+ curr_frame = get_current_frame ();
if (!curr_frame)
return (struct exception_event_record *) NULL;
if (level != 0)
return (struct exception_event_record *) NULL;
- select_frame (fi, -1);
+ select_frame (fi);
/* Read in the arguments */
/* __d_eh_notify_callback() is called with 3 arguments:
- 1. event kind catch or throw
- 2. the target address if known
- 3. a flag -- not sure what this is. pai/1997-07-17 */
- event_kind = read_register (ARG0_REGNUM);
+ 1. event kind catch or throw
+ 2. the target address if known
+ 3. a flag -- not sure what this is. pai/1997-07-17 */
+ event_kind = read_register (ARG0_REGNUM);
catch_addr = read_register (ARG1_REGNUM);
/* Now go down to a user frame */
/* For a throw, __d_eh_break is called by
- __d_eh_notify_callback which is called by
- __notify_throw which is called
- from user code.
+ __d_eh_notify_callback which is called by
+ __notify_throw which is called
+ from user code.
For a catch, __d_eh_break is called by
- __d_eh_notify_callback which is called by
- <stackwalking stuff> which is called by
- __throw__<stuff> or __rethrow_<stuff> which is called
- from user code. */
- /* FIXME: Don't use such magic numbers; search for the frames */
+ __d_eh_notify_callback which is called by
+ <stackwalking stuff> which is called by
+ __throw__<stuff> or __rethrow_<stuff> which is called
+ from user code. */
+ /* FIXME: Don't use such magic numbers; search for the frames */
level = (event_kind == EX_EVENT_THROW) ? 3 : 4;
fi = find_relative_frame (curr_frame, &level);
if (level != 0)
return (struct exception_event_record *) NULL;
- select_frame (fi, -1);
+ select_frame (fi);
throw_addr = fi->pc;
/* Go back to original (top) frame */
- select_frame (curr_frame, -1);
+ select_frame (curr_frame);
current_ex_event.kind = (enum exception_event_kind) event_kind;
current_ex_event.throw_sal = find_pc_line (throw_addr, 1);
return ¤t_ex_event;
}
+/* Instead of this nasty cast, add a method pvoid() that prints out a
+ host VOID data type (remember %p isn't portable). */
-#ifdef MAINTENANCE_CMDS
+static CORE_ADDR
+hppa_pointer_to_address_hack (void *ptr)
+{
+ gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr));
+ return POINTER_TO_ADDRESS (builtin_type_void_data_ptr, &ptr);
+}
static void
-unwind_command (exp, from_tty)
- char *exp;
- int from_tty;
+unwind_command (char *exp, int from_tty)
{
CORE_ADDR address;
struct unwind_table_entry *u;
return;
}
- printf_unfiltered ("unwind_table_entry (0x%x):\n", u);
+ printf_unfiltered ("unwind_table_entry (0x%s):\n",
+ paddr_nz (hppa_pointer_to_address_hack (u)));
printf_unfiltered ("\tregion_start = ");
print_address (u->region_start, gdb_stdout);
printf_unfiltered ("\n\tregion_end = ");
print_address (u->region_end, gdb_stdout);
-#ifdef __STDC__
#define pif(FLD) if (u->FLD) printf_unfiltered (" "#FLD);
-#else
-#define pif(FLD) if (u->FLD) printf_unfiltered (" FLD");
-#endif
printf_unfiltered ("\n\tflags =");
pif (Cannot_unwind);
putchar_unfiltered ('\n');
-#ifdef __STDC__
#define pin(FLD) printf_unfiltered ("\t"#FLD" = 0x%x\n", u->FLD);
-#else
-#define pin(FLD) printf_unfiltered ("\tFLD = 0x%x\n", u->FLD);
-#endif
pin (Region_description);
pin (Entry_FR);
pin (Entry_GR);
pin (Total_frame_size);
}
-#endif /* MAINTENANCE_CMDS */
#ifdef PREPARE_TO_PROCEED
o User hits bp, deletes bp, switches threads -- NO
o User hits bp, deletes one of two or more bps
- at that PC, user switches threads -- YES
+ at that PC, user switches threads -- YES
o Plus, since we're buffering events, the user may have hit a
- breakpoint, deleted the breakpoint and then gotten another
- hit on that same breakpoint on another thread which
- actually hit before the delete. (FIXME in breakpoint.c
- so that "dead" breakpoints are ignored?) -- NO
+ breakpoint, deleted the breakpoint and then gotten another
+ hit on that same breakpoint on another thread which
+ actually hit before the delete. (FIXME in breakpoint.c
+ so that "dead" breakpoints are ignored?) -- NO
For these reasons, we have to violate information hiding and
call "breakpoint_here_p". If core gdb thinks there is a bpt
here, that's what counts, as core gdb is the one which is
- putting the BPT instruction in and taking it out. */
+ putting the BPT instruction in and taking it out.
+
+ Note that this implementation is potentially redundant now that
+ default_prepare_to_proceed() has been added.
+
+ FIXME This may not support switching threads after Ctrl-C
+ correctly. The default implementation does support this. */
int
-hppa_prepare_to_proceed()
+hppa_prepare_to_proceed (void)
{
pid_t old_thread;
pid_t current_thread;
- old_thread = hppa_switched_threads(inferior_pid);
+ old_thread = hppa_switched_threads (PIDGET (inferior_ptid));
if (old_thread != 0)
{
/* Switched over from "old_thread". Try to do
as little work as possible, 'cause mostly
we're going to switch back. */
CORE_ADDR new_pc;
- CORE_ADDR old_pc = read_pc();
+ CORE_ADDR old_pc = read_pc ();
/* Yuk, shouldn't use global to specify current
thread. But that's how gdb does it. */
- current_thread = inferior_pid;
- inferior_pid = old_thread;
+ current_thread = PIDGET (inferior_ptid);
+ inferior_ptid = pid_to_ptid (old_thread);
- new_pc = read_pc();
- if (new_pc != old_pc /* If at same pc, no need */
+ new_pc = read_pc ();
+ if (new_pc != old_pc /* If at same pc, no need */
&& breakpoint_here_p (new_pc))
- {
+ {
/* User hasn't deleted the BP.
- Return TRUE, finishing switch to "old_thread". */
+ Return TRUE, finishing switch to "old_thread". */
flush_cached_frames ();
registers_changed ();
#if 0
- printf("---> PREPARE_TO_PROCEED (was %d, now %d)!\n",
- current_thread, inferior_pid);
+ printf ("---> PREPARE_TO_PROCEED (was %d, now %d)!\n",
+ current_thread, PIDGET (inferior_ptid));
#endif
-
+
return 1;
- }
+ }
/* Otherwise switch back to the user-chosen thread. */
- inferior_pid = current_thread;
- new_pc = read_pc(); /* Re-prime register cache */
+ inferior_ptid = pid_to_ptid (current_thread);
+ new_pc = read_pc (); /* Re-prime register cache */
}
return 0;
#endif /* PREPARE_TO_PROCEED */
void
-_initialize_hppa_tdep ()
+hppa_skip_permanent_breakpoint (void)
+{
+ /* To step over a breakpoint instruction on the PA takes some
+ fiddling with the instruction address queue.
+
+ When we stop at a breakpoint, the IA queue front (the instruction
+ we're executing now) points at the breakpoint instruction, and
+ the IA queue back (the next instruction to execute) points to
+ whatever instruction we would execute after the breakpoint, if it
+ were an ordinary instruction. This is the case even if the
+ breakpoint is in the delay slot of a branch instruction.
+
+ Clearly, to step past the breakpoint, we need to set the queue
+ front to the back. But what do we put in the back? What
+ instruction comes after that one? Because of the branch delay
+ slot, the next insn is always at the back + 4. */
+ write_register (PCOQ_HEAD_REGNUM, read_register (PCOQ_TAIL_REGNUM));
+ write_register (PCSQ_HEAD_REGNUM, read_register (PCSQ_TAIL_REGNUM));
+
+ write_register (PCOQ_TAIL_REGNUM, read_register (PCOQ_TAIL_REGNUM) + 4);
+ /* We can leave the tail's space the same, since there's no jump. */
+}
+
+/* Copy the function value from VALBUF into the proper location
+ for a function return.
+
+ Called only in the context of the "return" command. */
+
+void
+hppa_store_return_value (struct type *type, char *valbuf)
+{
+ /* For software floating point, the return value goes into the
+ integer registers. But we do not have any flag to key this on,
+ so we always store the value into the integer registers.
+
+ If its a float value, then we also store it into the floating
+ point registers. */
+ deprecated_write_register_bytes (REGISTER_BYTE (28)
+ + (TYPE_LENGTH (type) > 4
+ ? (8 - TYPE_LENGTH (type))
+ : (4 - TYPE_LENGTH (type))),
+ valbuf, TYPE_LENGTH (type));
+ if (! SOFT_FLOAT && TYPE_CODE (type) == TYPE_CODE_FLT)
+ deprecated_write_register_bytes (REGISTER_BYTE (FP4_REGNUM),
+ valbuf, TYPE_LENGTH (type));
+}
+
+/* Copy the function's return value into VALBUF.
+
+ This function is called only in the context of "target function calls",
+ ie. when the debugger forces a function to be called in the child, and
+ when the debugger forces a fucntion to return prematurely via the
+ "return" command. */
+
+void
+hppa_extract_return_value (struct type *type, char *regbuf, char *valbuf)
+{
+ if (! SOFT_FLOAT && TYPE_CODE (type) == TYPE_CODE_FLT)
+ memcpy (valbuf,
+ (char *)regbuf + REGISTER_BYTE (FP4_REGNUM),
+ TYPE_LENGTH (type));
+ else
+ memcpy (valbuf,
+ ((char *)regbuf
+ + REGISTER_BYTE (28)
+ + (TYPE_LENGTH (type) > 4
+ ? (8 - TYPE_LENGTH (type))
+ : (4 - TYPE_LENGTH (type)))),
+ TYPE_LENGTH (type));
+}
+
+int
+hppa_reg_struct_has_addr (int gcc_p, struct type *type)
+{
+ /* On the PA, any pass-by-value structure > 8 bytes is actually passed
+ via a pointer regardless of its type or the compiler used. */
+ return (TYPE_LENGTH (type) > 8);
+}
+
+int
+hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs)
+{
+ /* Stack grows upward */
+ return (lhs > rhs);
+}
+
+CORE_ADDR
+hppa_stack_align (CORE_ADDR sp)
+{
+ /* elz: adjust the quantity to the next highest value which is
+ 64-bit aligned. This is used in valops.c, when the sp is adjusted.
+ On hppa the sp must always be kept 64-bit aligned */
+ return ((sp % 8) ? (sp + 7) & -8 : sp);
+}
+
+int
+hppa_pc_requires_run_before_use (CORE_ADDR pc)
+{
+ /* Sometimes we may pluck out a minimal symbol that has a negative address.
+
+ An example of this occurs when an a.out is linked against a foo.sl.
+ The foo.sl defines a global bar(), and the a.out declares a signature
+ for bar(). However, the a.out doesn't directly call bar(), but passes
+ its address in another call.
+
+ If you have this scenario and attempt to "break bar" before running,
+ gdb will find a minimal symbol for bar() in the a.out. But that
+ symbol's address will be negative. What this appears to denote is
+ an index backwards from the base of the procedure linkage table (PLT)
+ into the data linkage table (DLT), the end of which is contiguous
+ with the start of the PLT. This is clearly not a valid address for
+ us to set a breakpoint on.
+
+ Note that one must be careful in how one checks for a negative address.
+ 0xc0000000 is a legitimate address of something in a shared text
+ segment, for example. Since I don't know what the possible range
+ is of these "really, truly negative" addresses that come from the
+ minimal symbols, I'm resorting to the gross hack of checking the
+ top byte of the address for all 1's. Sigh. */
+
+ return (!target_has_stack && (pc & 0xFF000000));
+}
+
+int
+hppa_instruction_nullified (void)
+{
+ /* brobecker 2002/11/07: Couldn't we use a ULONGEST here? It would
+ avoid the type cast. I'm leaving it as is for now as I'm doing
+ semi-mechanical multiarching-related changes. */
+ const int ipsw = (int) read_register (IPSW_REGNUM);
+ const int flags = (int) read_register (FLAGS_REGNUM);
+
+ return ((ipsw & 0x00200000) && !(flags & 0x2));
+}
+
+int
+hppa_register_raw_size (int reg_nr)
+{
+ /* All registers have the same size. */
+ return REGISTER_SIZE;
+}
+
+/* Index within the register vector of the first byte of the space i
+ used for register REG_NR. */
+
+int
+hppa_register_byte (int reg_nr)
+{
+ return reg_nr * 4;
+}
+
+/* Return the GDB type object for the "standard" data type of data
+ in register N. */
+
+struct type *
+hppa_register_virtual_type (int reg_nr)
+{
+ if (reg_nr < FP4_REGNUM)
+ return builtin_type_int;
+ else
+ return builtin_type_float;
+}
+
+/* Store the address of the place in which to copy the structure the
+ subroutine will return. This is called from call_function. */
+
+void
+hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
+{
+ write_register (28, addr);
+}
+
+CORE_ADDR
+hppa_extract_struct_value_address (char *regbuf)
+{
+ /* Extract from an array REGBUF containing the (raw) register state
+ the address in which a function should return its structure value,
+ as a CORE_ADDR (or an expression that can be used as one). */
+ /* FIXME: brobecker 2002-12-26.
+ The current implementation is historical, but we should eventually
+ implement it in a more robust manner as it relies on the fact that
+ the address size is equal to the size of an int* _on the host_...
+ One possible implementation that crossed my mind is to use
+ extract_address. */
+ return (*(int *)(regbuf + REGISTER_BYTE (28)));
+}
+
+/* Return True if REGNUM is not a register available to the user
+ through ptrace(). */
+
+int
+hppa_cannot_store_register (int regnum)
+{
+ return (regnum == 0
+ || regnum == PCSQ_HEAD_REGNUM
+ || (regnum >= PCSQ_TAIL_REGNUM && regnum < IPSW_REGNUM)
+ || (regnum > IPSW_REGNUM && regnum < FP4_REGNUM));
+
+}
+
+CORE_ADDR
+hppa_frame_args_address (struct frame_info *fi)
+{
+ return fi->frame;
+}
+
+CORE_ADDR
+hppa_frame_locals_address (struct frame_info *fi)
{
+ return fi->frame;
+}
+
+int
+hppa_frame_num_args (struct frame_info *frame)
+{
+ /* We can't tell how many args there are now that the C compiler delays
+ popping them. */
+ return -1;
+}
+
+CORE_ADDR
+hppa_smash_text_address (CORE_ADDR addr)
+{
+ /* The low two bits of the PC on the PA contain the privilege level.
+ Some genius implementing a (non-GCC) compiler apparently decided
+ this means that "addresses" in a text section therefore include a
+ privilege level, and thus symbol tables should contain these bits.
+ This seems like a bonehead thing to do--anyway, it seems to work
+ for our purposes to just ignore those bits. */
+
+ return (addr &= ~0x3);
+}
+
+static struct gdbarch *
+hppa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+{
+ struct gdbarch *gdbarch;
+
+ /* Try to determine the ABI of the object we are loading. */
+ if (info.abfd != NULL && info.osabi == GDB_OSABI_UNKNOWN)
+ {
+ /* If it's a SOM file, assume it's HP/UX SOM. */
+ if (bfd_get_flavour (info.abfd) == bfd_target_som_flavour)
+ info.osabi = GDB_OSABI_HPUX_SOM;
+ }
+
+ /* find a candidate among the list of pre-declared architectures. */
+ arches = gdbarch_list_lookup_by_info (arches, &info);
+ if (arches != NULL)
+ return (arches->gdbarch);
+
+ /* If none found, then allocate and initialize one. */
+ gdbarch = gdbarch_alloc (&info, NULL);
+
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch);
+
+ set_gdbarch_reg_struct_has_addr (gdbarch, hppa_reg_struct_has_addr);
+ set_gdbarch_function_start_offset (gdbarch, 0);
+ set_gdbarch_skip_prologue (gdbarch, hppa_skip_prologue);
+ set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code);
+ set_gdbarch_in_solib_call_trampoline (gdbarch, hppa_in_solib_call_trampoline);
+ set_gdbarch_in_solib_return_trampoline (gdbarch,
+ hppa_in_solib_return_trampoline);
+ set_gdbarch_saved_pc_after_call (gdbarch, hppa_saved_pc_after_call);
+ set_gdbarch_inner_than (gdbarch, hppa_inner_than);
+ set_gdbarch_stack_align (gdbarch, hppa_stack_align);
+ set_gdbarch_decr_pc_after_break (gdbarch, 0);
+ set_gdbarch_register_size (gdbarch, 4);
+ set_gdbarch_num_regs (gdbarch, hppa_num_regs);
+ set_gdbarch_fp_regnum (gdbarch, 3);
+ set_gdbarch_sp_regnum (gdbarch, 30);
+ set_gdbarch_fp0_regnum (gdbarch, 64);
+ set_gdbarch_pc_regnum (gdbarch, PCOQ_HEAD_REGNUM);
+ set_gdbarch_npc_regnum (gdbarch, PCOQ_TAIL_REGNUM);
+ set_gdbarch_register_raw_size (gdbarch, hppa_register_raw_size);
+ set_gdbarch_register_bytes (gdbarch, hppa_num_regs * 4);
+ set_gdbarch_register_byte (gdbarch, hppa_register_byte);
+ set_gdbarch_register_virtual_size (gdbarch, hppa_register_raw_size);
+ set_gdbarch_deprecated_max_register_raw_size (gdbarch, 4);
+ set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 8);
+ set_gdbarch_register_virtual_type (gdbarch, hppa_register_virtual_type);
+ set_gdbarch_deprecated_store_struct_return (gdbarch, hppa_store_struct_return);
+ set_gdbarch_deprecated_extract_return_value (gdbarch,
+ hppa_extract_return_value);
+ set_gdbarch_use_struct_convention (gdbarch, hppa_use_struct_convention);
+ set_gdbarch_deprecated_store_return_value (gdbarch, hppa_store_return_value);
+ set_gdbarch_deprecated_extract_struct_value_address
+ (gdbarch, hppa_extract_struct_value_address);
+ set_gdbarch_cannot_store_register (gdbarch, hppa_cannot_store_register);
+ set_gdbarch_deprecated_init_extra_frame_info (gdbarch, hppa_init_extra_frame_info);
+ set_gdbarch_deprecated_frame_chain (gdbarch, hppa_frame_chain);
+ set_gdbarch_deprecated_frame_chain_valid (gdbarch, hppa_frame_chain_valid);
+ set_gdbarch_frameless_function_invocation
+ (gdbarch, hppa_frameless_function_invocation);
+ set_gdbarch_deprecated_frame_saved_pc (gdbarch, hppa_frame_saved_pc);
+ set_gdbarch_frame_args_address (gdbarch, hppa_frame_args_address);
+ set_gdbarch_frame_locals_address (gdbarch, hppa_frame_locals_address);
+ set_gdbarch_frame_num_args (gdbarch, hppa_frame_num_args);
+ set_gdbarch_frame_args_skip (gdbarch, 0);
+ set_gdbarch_deprecated_push_dummy_frame (gdbarch, hppa_push_dummy_frame);
+ set_gdbarch_deprecated_pop_frame (gdbarch, hppa_pop_frame);
+ set_gdbarch_call_dummy_length (gdbarch, INSTRUCTION_SIZE * 28);
+ /* set_gdbarch_fix_call_dummy (gdbarch, hppa_fix_call_dummy); */
+ set_gdbarch_deprecated_push_arguments (gdbarch, hppa_push_arguments);
+ set_gdbarch_smash_text_address (gdbarch, hppa_smash_text_address);
+ set_gdbarch_believe_pcc_promotion (gdbarch, 1);
+ set_gdbarch_read_pc (gdbarch, hppa_target_read_pc);
+ set_gdbarch_write_pc (gdbarch, hppa_target_write_pc);
+ set_gdbarch_read_fp (gdbarch, hppa_target_read_fp);
+
+ return gdbarch;
+}
+
+static void
+hppa_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
+{
+ /* Nothing to print for the moment. */
+}
+
+void
+_initialize_hppa_tdep (void)
+{
+ struct cmd_list_element *c;
+ void break_at_finish_command (char *arg, int from_tty);
+ void tbreak_at_finish_command (char *arg, int from_tty);
+ void break_at_finish_at_depth_command (char *arg, int from_tty);
+
+ gdbarch_register (bfd_arch_hppa, hppa_gdbarch_init, hppa_dump_tdep);
tm_print_insn = print_insn_hppa;
-#ifdef MAINTENANCE_CMDS
add_cmd ("unwind", class_maintenance, unwind_command,
"Print unwind table entry at given address.",
&maintenanceprintlist);
-#endif /* MAINTENANCE_CMDS */
+
+ deprecate_cmd (add_com ("xbreak", class_breakpoint,
+ break_at_finish_command,
+ concat ("Set breakpoint at procedure exit. \n\
+Argument may be function name, or \"*\" and an address.\n\
+If function is specified, break at end of code for that function.\n\
+If an address is specified, break at the end of the function that contains \n\
+that exact address.\n",
+ "With no arg, uses current execution address of selected stack frame.\n\
+This is useful for breaking on return to a stack frame.\n\
+\n\
+Multiple breakpoints at one place are permitted, and useful if conditional.\n\
+\n\
+Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL)), NULL);
+ deprecate_cmd (add_com_alias ("xb", "xbreak", class_breakpoint, 1), NULL);
+ deprecate_cmd (add_com_alias ("xbr", "xbreak", class_breakpoint, 1), NULL);
+ deprecate_cmd (add_com_alias ("xbre", "xbreak", class_breakpoint, 1), NULL);
+ deprecate_cmd (add_com_alias ("xbrea", "xbreak", class_breakpoint, 1), NULL);
+
+ deprecate_cmd (c = add_com ("txbreak", class_breakpoint,
+ tbreak_at_finish_command,
+"Set temporary breakpoint at procedure exit. Either there should\n\
+be no argument or the argument must be a depth.\n"), NULL);
+ set_cmd_completer (c, location_completer);
+
+ if (xdb_commands)
+ deprecate_cmd (add_com ("bx", class_breakpoint,
+ break_at_finish_at_depth_command,
+"Set breakpoint at procedure exit. Either there should\n\
+be no argument or the argument must be a depth.\n"), NULL);
}
+
projects / deliverable / binutils-gdb.git / blobdiff