/* Target-dependent code for the HP PA architecture, for GDB.
Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
+ Foundation, Inc.
Contributed by the Center for Software Science at the
University of Utah (pa-gdb-bugs@cs.utah.edu).
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"
+#include "arch-utils.h"
/* For argument passing to the inferior */
#include "symtab.h"
-#include "infcall.h"
#include "dis-asm.h"
-
-#ifdef USG
-#include <sys/types.h>
-#endif
-
-#include <dl.h>
-#include <sys/param.h>
-#include <signal.h>
-
-#include <sys/ptrace.h>
-#include <machine/save_state.h>
-
-#ifdef COFF_ENCAPSULATE
-#include "a.out.encap.h"
-#else
-#endif
-
-/*#include <sys/user.h> After a.out.h */
-#include <sys/file.h>
-#include "gdb_stat.h"
-#include "gdb_wait.h"
+#include "trad-frame.h"
+#include "frame-unwind.h"
+#include "frame-base.h"
#include "gdbcore.h"
#include "gdbcmd.h"
-#include "target.h"
-#include "symfile.h"
#include "objfiles.h"
#include "hppa-tdep.h"
+static int hppa_debug = 0;
+
/* Some local constants. */
static const int hppa32_num_regs = 128;
static const int hppa64_num_regs = 96;
-static const int hppa64_call_dummy_breakpoint_offset = 22 * 4;
-
-/* DEPRECATED_CALL_DUMMY_LENGTH is computed based on the size of a
- word on the target machine, not the size of an instruction. Since
- a word on this target holds two instructions we have to divide the
- instruction size by two to get the word size of the dummy. */
-static const int hppa32_call_dummy_length = INSTRUCTION_SIZE * 28;
-static const int hppa64_call_dummy_length = INSTRUCTION_SIZE * 26 / 2;
+/* hppa-specific object data -- unwind and solib info.
+ TODO/maybe: think about splitting this into two parts; the unwind data is
+ common to all hppa targets, but is only used in this file; we can register
+ that separately and make this static. The solib data is probably hpux-
+ specific, so we can create a separate extern objfile_data that is registered
+ by hppa-hpux-tdep.c and shared with pa64solib.c and somsolib.c. */
+const struct objfile_data *hppa_objfile_priv_data = NULL;
/* Get at various relevent fields of an instruction word. */
#define MASK_5 0x1f
#define MASK_14 0x3fff
#define MASK_21 0x1fffff
-/* Define offsets into the call dummy for the target function address.
- See comments related to CALL_DUMMY for more info. */
-#define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9)
-#define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10)
-
-/* Define offsets into the call dummy for the _sr4export address.
- See comments related to CALL_DUMMY for more info. */
-#define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12)
-#define SR4EXPORT_LDO_OFFSET (INSTRUCTION_SIZE * 13)
-
-/* 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)
-
/* Sizes (in bytes) of the native unwind entries. */
#define UNWIND_ENTRY_SIZE 16
#define STUB_UNWIND_ENTRY_SIZE 8
-static int get_field (unsigned word, int from, int to);
-
-static int extract_5_load (unsigned int);
-
-static unsigned extract_5R_store (unsigned int);
-
-static unsigned extract_5r_store (unsigned int);
-
-static void find_dummy_frame_regs (struct frame_info *, CORE_ADDR *);
-
-static int find_proc_framesize (CORE_ADDR);
-
-static int find_return_regnum (CORE_ADDR);
-
-struct unwind_table_entry *find_unwind_entry (CORE_ADDR);
-
-static int extract_17 (unsigned int);
-
-static unsigned deposit_21 (unsigned int, unsigned int);
-
-static int extract_21 (unsigned);
-
-static unsigned deposit_14 (int, unsigned int);
-
-static int extract_14 (unsigned);
-
-static void unwind_command (char *, int);
-
-static int low_sign_extend (unsigned int, unsigned int);
-
-static int sign_extend (unsigned int, unsigned int);
-
-static int restore_pc_queue (CORE_ADDR *);
-
-static int hppa_alignof (struct type *);
-
-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 hppa32_stack_align (CORE_ADDR sp);
-CORE_ADDR hppa64_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 * hppa32_register_virtual_type (int reg_nr);
-struct type * hppa64_register_virtual_type (int reg_nr);
-void hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
-void hppa32_extract_return_value (struct type *type, char *regbuf,
- char *valbuf);
-void hppa64_extract_return_value (struct type *type, char *regbuf,
- char *valbuf);
-int hppa32_use_struct_convention (int gcc_p, struct type *type);
-int hppa64_use_struct_convention (int gcc_p, struct type *type);
-void hppa32_store_return_value (struct type *type, char *valbuf);
-void hppa64_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);
-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 int cover_find_stub_with_shl_get (void *);
-
-static int is_pa_2 = 0; /* False */
-/* This is declared in symtab.c; set to 1 in hp-symtab-read.c */
-extern int hp_som_som_object_present;
+/* Handle 32/64-bit struct return conventions. */
-/* In breakpoint.c */
-extern int exception_catchpoints_are_fragile;
-
-/* Should call_function allocate stack space for a struct return? */
-
-int
-hppa32_use_struct_convention (int gcc_p, struct type *type)
-{
- return (TYPE_LENGTH (type) > 2 * DEPRECATED_REGISTER_SIZE);
-}
-
-/* Same as hppa32_use_struct_convention() for the PA64 ABI. */
-
-int
-hppa64_use_struct_convention (int gcc_p, struct type *type)
+static enum return_value_convention
+hppa32_return_value (struct gdbarch *gdbarch,
+ struct type *type, struct regcache *regcache,
+ void *readbuf, const void *writebuf)
{
- /* RM: struct upto 128 bits are returned in registers */
- return TYPE_LENGTH (type) > 16;
+ if (TYPE_LENGTH (type) <= 2 * 4)
+ {
+ /* The value always lives in the right hand end of the register
+ (or register pair)? */
+ int b;
+ int reg = TYPE_CODE (type) == TYPE_CODE_FLT ? HPPA_FP4_REGNUM : 28;
+ int part = TYPE_LENGTH (type) % 4;
+ /* The left hand register contains only part of the value,
+ transfer that first so that the rest can be xfered as entire
+ 4-byte registers. */
+ if (part > 0)
+ {
+ if (readbuf != NULL)
+ regcache_cooked_read_part (regcache, reg, 4 - part,
+ part, readbuf);
+ if (writebuf != NULL)
+ regcache_cooked_write_part (regcache, reg, 4 - part,
+ part, writebuf);
+ reg++;
+ }
+ /* Now transfer the remaining register values. */
+ for (b = part; b < TYPE_LENGTH (type); b += 4)
+ {
+ if (readbuf != NULL)
+ regcache_cooked_read (regcache, reg, (char *) readbuf + b);
+ if (writebuf != NULL)
+ regcache_cooked_write (regcache, reg, (const char *) writebuf + b);
+ reg++;
+ }
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
+ else
+ return RETURN_VALUE_STRUCT_CONVENTION;
+}
+
+static enum return_value_convention
+hppa64_return_value (struct gdbarch *gdbarch,
+ struct type *type, struct regcache *regcache,
+ void *readbuf, const void *writebuf)
+{
+ /* RM: Floats are returned in FR4R, doubles in FR4. Integral values
+ are in r28, padded on the left. Aggregates less that 65 bits are
+ in r28, right padded. Aggregates upto 128 bits are in r28 and
+ r29, right padded. */
+ if (TYPE_CODE (type) == TYPE_CODE_FLT
+ && TYPE_LENGTH (type) <= 8)
+ {
+ /* Floats are right aligned? */
+ int offset = register_size (gdbarch, HPPA_FP4_REGNUM) - TYPE_LENGTH (type);
+ if (readbuf != NULL)
+ regcache_cooked_read_part (regcache, HPPA_FP4_REGNUM, offset,
+ TYPE_LENGTH (type), readbuf);
+ if (writebuf != NULL)
+ regcache_cooked_write_part (regcache, HPPA_FP4_REGNUM, offset,
+ TYPE_LENGTH (type), writebuf);
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
+ else if (TYPE_LENGTH (type) <= 8 && is_integral_type (type))
+ {
+ /* Integrals are right aligned. */
+ int offset = register_size (gdbarch, HPPA_FP4_REGNUM) - TYPE_LENGTH (type);
+ if (readbuf != NULL)
+ regcache_cooked_read_part (regcache, 28, offset,
+ TYPE_LENGTH (type), readbuf);
+ if (writebuf != NULL)
+ regcache_cooked_write_part (regcache, 28, offset,
+ TYPE_LENGTH (type), writebuf);
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
+ else if (TYPE_LENGTH (type) <= 2 * 8)
+ {
+ /* Composite values are left aligned. */
+ int b;
+ for (b = 0; b < TYPE_LENGTH (type); b += 8)
+ {
+ int part = min (8, TYPE_LENGTH (type) - b);
+ if (readbuf != NULL)
+ regcache_cooked_read_part (regcache, 28 + b / 8, 0, part,
+ (char *) readbuf + b);
+ if (writebuf != NULL)
+ regcache_cooked_write_part (regcache, 28 + b / 8, 0, part,
+ (const char *) writebuf + b);
+ }
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
+ else
+ return RETURN_VALUE_STRUCT_CONVENTION;
}
/* Routines to extract various sized constants out of hppa
/* This assumes that no garbage lies outside of the lower bits of
value. */
-static int
-sign_extend (unsigned val, unsigned bits)
+int
+hppa_sign_extend (unsigned val, unsigned bits)
{
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 (unsigned val, unsigned bits)
+int
+hppa_low_hppa_sign_extend (unsigned val, unsigned bits)
{
return (int) ((val & 0x1 ? (-1 << (bits - 1)) : 0) | val >> 1);
}
/* Extract the bits at positions between FROM and TO, using HP's numbering
(MSB = 0). */
-static int
-get_field (unsigned word, int from, int to)
+int
+hppa_get_field (unsigned word, int from, int to)
{
return ((word) >> (31 - (to)) & ((1 << ((to) - (from) + 1)) - 1));
}
/* extract the immediate field from a ld{bhw}s instruction */
-static int
-extract_5_load (unsigned word)
+int
+hppa_extract_5_load (unsigned word)
{
- return low_sign_extend (word >> 16 & MASK_5, 5);
+ return hppa_low_hppa_sign_extend (word >> 16 & MASK_5, 5);
}
/* extract the immediate field from a break instruction */
-static unsigned
-extract_5r_store (unsigned word)
+unsigned
+hppa_extract_5r_store (unsigned word)
{
return (word & MASK_5);
}
/* extract the immediate field from a {sr}sm instruction */
-static unsigned
-extract_5R_store (unsigned word)
+unsigned
+hppa_extract_5R_store (unsigned word)
{
return (word >> 16 & MASK_5);
}
/* extract a 14 bit immediate field */
-static int
-extract_14 (unsigned word)
-{
- return low_sign_extend (word & MASK_14, 14);
-}
-
-/* deposit a 14 bit constant in a word */
-
-static unsigned
-deposit_14 (int opnd, unsigned word)
+int
+hppa_extract_14 (unsigned word)
{
- unsigned sign = (opnd < 0 ? 1 : 0);
-
- return word | ((unsigned) opnd << 1 & MASK_14) | sign;
+ return hppa_low_hppa_sign_extend (word & MASK_14, 14);
}
/* extract a 21 bit constant */
-static int
-extract_21 (unsigned word)
+int
+hppa_extract_21 (unsigned word)
{
int val;
word &= MASK_21;
word <<= 11;
- val = get_field (word, 20, 20);
+ val = hppa_get_field (word, 20, 20);
val <<= 11;
- val |= get_field (word, 9, 19);
+ val |= hppa_get_field (word, 9, 19);
val <<= 2;
- val |= get_field (word, 5, 6);
+ val |= hppa_get_field (word, 5, 6);
val <<= 5;
- val |= get_field (word, 0, 4);
- val <<= 2;
- val |= get_field (word, 7, 8);
- return sign_extend (val, 21) << 11;
-}
-
-/* deposit a 21 bit constant in a word. Although 21 bit constants are
- usually the top 21 bits of a 32 bit constant, we assume that only
- the low 21 bits of opnd are relevant */
-
-static unsigned
-deposit_21 (unsigned opnd, unsigned word)
-{
- unsigned val = 0;
-
- val |= get_field (opnd, 11 + 14, 11 + 18);
+ val |= hppa_get_field (word, 0, 4);
val <<= 2;
- val |= get_field (opnd, 11 + 12, 11 + 13);
- val <<= 2;
- val |= get_field (opnd, 11 + 19, 11 + 20);
- val <<= 11;
- val |= get_field (opnd, 11 + 1, 11 + 11);
- val <<= 1;
- val |= get_field (opnd, 11 + 0, 11 + 0);
- return word | val;
+ val |= hppa_get_field (word, 7, 8);
+ return hppa_sign_extend (val, 21) << 11;
}
/* extract a 17 bit constant from branch instructions, returning the
19 bit signed value. */
-static int
-extract_17 (unsigned word)
+int
+hppa_extract_17 (unsigned word)
{
- return sign_extend (get_field (word, 19, 28) |
- get_field (word, 29, 29) << 10 |
- get_field (word, 11, 15) << 11 |
+ return hppa_sign_extend (hppa_get_field (word, 19, 28) |
+ hppa_get_field (word, 29, 29) << 10 |
+ hppa_get_field (word, 11, 15) << 11 |
(word & 0x1) << 16, 17) << 2;
}
+
+CORE_ADDR
+hppa_symbol_address(const char *sym)
+{
+ struct minimal_symbol *minsym;
+
+ minsym = lookup_minimal_symbol (sym, NULL, NULL);
+ if (minsym)
+ return SYMBOL_VALUE_ADDRESS (minsym);
+ else
+ return (CORE_ADDR)-1;
+}
\f
/* Compare the start address for two unwind entries returning 1 if
return 0;
}
-static CORE_ADDR low_text_segment_address;
-
static void
-record_text_segment_lowaddr (bfd *abfd, asection *section, void *ignored)
+record_text_segment_lowaddr (bfd *abfd, asection *section, void *data)
{
- if (((section->flags & (SEC_ALLOC | SEC_LOAD | SEC_READONLY))
+ 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;
+ {
+ bfd_vma value = section->vma - section->filepos;
+ CORE_ADDR *low_text_segment_address = (CORE_ADDR *)data;
+
+ if (value < *low_text_segment_address)
+ *low_text_segment_address = value;
+ }
}
static void
{
/* We will read the unwind entries into temporary memory, then
fill in the actual unwind table. */
+
if (size > 0)
{
unsigned long tmp;
unsigned i;
char *buf = alloca (size);
+ CORE_ADDR low_text_segment_address;
- low_text_segment_address = -1;
-
- /* If addresses are 64 bits wide, then unwinds are supposed to
+ /* For ELF targets, 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)
+ if (gdbarch_tdep (current_gdbarch)->is_elf && text_offset == 0)
{
+ low_text_segment_address = -1;
+
bfd_map_over_sections (objfile->obfd,
- record_text_segment_lowaddr, NULL);
+ record_text_segment_lowaddr,
+ &low_text_segment_address);
- /* ?!? 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;
+ text_offset = low_text_segment_address;
}
bfd_get_section_contents (objfile->obfd, section, buf, 0, 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;
+ struct hppa_unwind_info *ui;
+ struct hppa_objfile_private *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 hppa_unwind_info *) obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct hppa_unwind_info));
ui->table = NULL;
ui->cache = NULL;
/* Allocate memory for the unwind table. */
ui->table = (struct unwind_table_entry *)
- obstack_alloc (&objfile->psymbol_obstack, total_size);
+ obstack_alloc (&objfile->objfile_obstack, total_size);
ui->last = total_entries - 1;
/* Now read in each unwind section and internalize the standard unwind
compare_unwind_entries);
/* Keep a pointer to the unwind information. */
- if (objfile->obj_private == NULL)
- {
- obj_private = (obj_private_data_t *)
- obstack_alloc (&objfile->psymbol_obstack,
- sizeof (obj_private_data_t));
+ obj_private = (struct hppa_objfile_private *)
+ objfile_data (objfile, hppa_objfile_priv_data);
+ if (obj_private == NULL)
+ {
+ obj_private = (struct hppa_objfile_private *)
+ obstack_alloc (&objfile->objfile_obstack,
+ sizeof (struct hppa_objfile_private));
+ set_objfile_data (objfile, hppa_objfile_priv_data, obj_private);
obj_private->unwind_info = NULL;
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->unwind_info = ui;
}
{
int first, middle, last;
struct objfile *objfile;
+ struct hppa_objfile_private *priv;
+
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "{ find_unwind_entry 0x%s -> ",
+ paddr_nz (pc));
/* A function at address 0? Not in HP-UX! */
if (pc == (CORE_ADDR) 0)
- return NULL;
+ {
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "NULL }\n");
+ return NULL;
+ }
ALL_OBJFILES (objfile)
{
- struct obj_unwind_info *ui;
+ struct hppa_unwind_info *ui;
ui = NULL;
- if (objfile->obj_private)
- ui = ((obj_private_data_t *) (objfile->obj_private))->unwind_info;
+ priv = objfile_data (objfile, hppa_objfile_priv_data);
+ if (priv)
+ ui = ((struct hppa_objfile_private *) priv)->unwind_info;
if (!ui)
{
read_unwind_info (objfile);
- if (objfile->obj_private == NULL)
+ priv = objfile_data (objfile, hppa_objfile_priv_data);
+ if (priv == NULL)
error ("Internal error reading unwind information.");
- ui = ((obj_private_data_t *) (objfile->obj_private))->unwind_info;
+ ui = ((struct hppa_objfile_private *) priv)->unwind_info;
}
/* First, check the cache */
if (ui->cache
&& pc >= ui->cache->region_start
&& pc <= ui->cache->region_end)
- return ui->cache;
+ {
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "0x%s (cached) }\n",
+ paddr_nz ((CORE_ADDR) ui->cache));
+ return ui->cache;
+ }
/* Not in the cache, do a binary search */
&& pc <= ui->table[middle].region_end)
{
ui->cache = &ui->table[middle];
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "0x%s }\n",
+ paddr_nz ((CORE_ADDR) ui->cache));
return &ui->table[middle];
}
first = middle + 1;
}
} /* ALL_OBJFILES() */
+
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "NULL (not found) }\n");
+
return NULL;
}
-const unsigned char *
+static const unsigned char *
hppa_breakpoint_from_pc (CORE_ADDR *pc, int *len)
{
- static const char breakpoint[] = {0x00, 0x01, 0x00, 0x04};
+ static const unsigned char breakpoint[] = {0x00, 0x01, 0x00, 0x04};
(*len) = sizeof (breakpoint);
return breakpoint;
}
return names[i];
}
+/* 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.)
-/* Return the adjustment necessary to make for addresses on the stack
- as presented by hpread.c.
-
- This is necessary because of the stack direction on the PA and the
- bizarre way in which someone (?) decided they wanted to handle
- frame pointerless code in GDB. */
-int
-hpread_adjust_stack_address (CORE_ADDR func_addr)
-{
- struct unwind_table_entry *u;
-
- u = find_unwind_entry (func_addr);
- if (!u)
- return 0;
- else
- return u->Total_frame_size << 3;
-}
+ We simply allocate the appropriate amount of stack space and put
+ arguments into their proper slots. */
+
+CORE_ADDR
+hppa32_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
+ struct regcache *regcache, CORE_ADDR bp_addr,
+ int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr)
+{
+ /* Stack base address at which any pass-by-reference parameters are
+ stored. */
+ CORE_ADDR struct_end = 0;
+ /* Stack base address at which the first parameter is stored. */
+ CORE_ADDR param_end = 0;
+
+ /* The inner most end of the stack after all the parameters have
+ been pushed. */
+ CORE_ADDR new_sp = 0;
+
+ /* Two passes. First pass computes the location of everything,
+ second pass writes the bytes out. */
+ int write_pass;
+
+ /* Global pointer (r19) of the function we are trying to call. */
+ CORE_ADDR gp;
+
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ for (write_pass = 0; write_pass < 2; write_pass++)
+ {
+ CORE_ADDR struct_ptr = 0;
+ /* The first parameter goes into sp-36, each stack slot is 4-bytes.
+ struct_ptr is adjusted for each argument below, so the first
+ argument will end up at sp-36. */
+ CORE_ADDR param_ptr = 32;
+ int i;
+ int small_struct = 0;
+
+ for (i = 0; i < nargs; i++)
+ {
+ struct value *arg = args[i];
+ struct type *type = check_typedef (VALUE_TYPE (arg));
+ /* The corresponding parameter that is pushed onto the
+ stack, and [possibly] passed in a register. */
+ char param_val[8];
+ int param_len;
+ memset (param_val, 0, sizeof param_val);
+ if (TYPE_LENGTH (type) > 8)
+ {
+ /* Large parameter, pass by reference. Store the value
+ in "struct" area and then pass its address. */
+ param_len = 4;
+ struct_ptr += align_up (TYPE_LENGTH (type), 8);
+ if (write_pass)
+ write_memory (struct_end - struct_ptr, VALUE_CONTENTS (arg),
+ TYPE_LENGTH (type));
+ store_unsigned_integer (param_val, 4, struct_end - struct_ptr);
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_INT
+ || TYPE_CODE (type) == TYPE_CODE_ENUM)
+ {
+ /* Integer value store, right aligned. "unpack_long"
+ takes care of any sign-extension problems. */
+ param_len = align_up (TYPE_LENGTH (type), 4);
+ store_unsigned_integer (param_val, param_len,
+ unpack_long (type,
+ VALUE_CONTENTS (arg)));
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_FLT)
+ {
+ /* Floating point value store, right aligned. */
+ param_len = align_up (TYPE_LENGTH (type), 4);
+ memcpy (param_val, VALUE_CONTENTS (arg), param_len);
+ }
+ else
+ {
+ param_len = align_up (TYPE_LENGTH (type), 4);
+
+ /* Small struct value are stored right-aligned. */
+ memcpy (param_val + param_len - TYPE_LENGTH (type),
+ VALUE_CONTENTS (arg), TYPE_LENGTH (type));
+
+ /* Structures of size 5, 6 and 7 bytes are special in that
+ the higher-ordered word is stored in the lower-ordered
+ argument, and even though it is a 8-byte quantity the
+ registers need not be 8-byte aligned. */
+ if (param_len > 4 && param_len < 8)
+ small_struct = 1;
+ }
-/* Called to determine if PC is in an interrupt handler of some
- kind. */
+ param_ptr += param_len;
+ if (param_len == 8 && !small_struct)
+ param_ptr = align_up (param_ptr, 8);
-static int
-pc_in_interrupt_handler (CORE_ADDR pc)
-{
- struct unwind_table_entry *u;
- struct minimal_symbol *msym_us;
+ /* First 4 non-FP arguments are passed in gr26-gr23.
+ First 4 32-bit FP arguments are passed in fr4L-fr7L.
+ First 2 64-bit FP arguments are passed in fr5 and fr7.
- u = find_unwind_entry (pc);
- if (!u)
- return 0;
+ The rest go on the stack, starting at sp-36, towards lower
+ addresses. 8-byte arguments must be aligned to a 8-byte
+ stack boundary. */
+ if (write_pass)
+ {
+ write_memory (param_end - param_ptr, param_val, param_len);
- /* Oh joys. HPUX sets the interrupt bit for _sigreturn even though
- its frame isn't a pure interrupt frame. Deal with this. */
- msym_us = lookup_minimal_symbol_by_pc (pc);
+ /* There are some cases when we don't know the type
+ expected by the callee (e.g. for variadic functions), so
+ pass the parameters in both general and fp regs. */
+ if (param_ptr <= 48)
+ {
+ int grreg = 26 - (param_ptr - 36) / 4;
+ int fpLreg = 72 + (param_ptr - 36) / 4 * 2;
+ int fpreg = 74 + (param_ptr - 32) / 8 * 4;
+
+ regcache_cooked_write (regcache, grreg, param_val);
+ regcache_cooked_write (regcache, fpLreg, param_val);
+
+ if (param_len > 4)
+ {
+ regcache_cooked_write (regcache, grreg + 1,
+ param_val + 4);
+
+ regcache_cooked_write (regcache, fpreg, param_val);
+ regcache_cooked_write (regcache, fpreg + 1,
+ param_val + 4);
+ }
+ }
+ }
+ }
- return (u->HP_UX_interrupt_marker
- && !PC_IN_SIGTRAMP (pc, DEPRECATED_SYMBOL_NAME (msym_us)));
-}
+ /* Update the various stack pointers. */
+ if (!write_pass)
+ {
+ struct_end = sp + align_up (struct_ptr, 64);
+ /* PARAM_PTR 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. */
+ param_end = struct_end + align_up (param_ptr, 64);
+ }
+ }
-/* Called when no unwind descriptor was found for PC. Returns 1 if it
- appears that PC is in a linker stub.
+ /* If a structure has to be returned, set up register 28 to hold its
+ address */
+ if (struct_return)
+ write_register (28, struct_addr);
- ?!? Need to handle stubs which appear in PA64 code. */
+ gp = tdep->find_global_pointer (function);
-static int
-pc_in_linker_stub (CORE_ADDR pc)
-{
- int found_magic_instruction = 0;
- int i;
- char buf[4];
+ if (gp != 0)
+ write_register (19, gp);
- /* If unable to read memory, assume pc is not in a linker stub. */
- if (target_read_memory (pc, buf, 4) != 0)
- return 0;
+ /* Set the return address. */
+ regcache_cooked_write_unsigned (regcache, HPPA_RP_REGNUM, bp_addr);
- /* We are looking for something like
+ /* Update the Stack Pointer. */
+ regcache_cooked_write_unsigned (regcache, HPPA_SP_REGNUM, param_end);
- ; $$dyncall jams RP into this special spot in the frame (RP')
- ; before calling the "call stub"
- ldw -18(sp),rp
+ return param_end;
+}
- ldsid (rp),r1 ; Get space associated with RP into r1
- mtsp r1,sp ; Move it into space register 0
- be,n 0(sr0),rp) ; back to your regularly scheduled program */
+/* This function pushes a stack frame with arguments as part of the
+ inferior function calling mechanism.
- /* Maximum known linker stub size is 4 instructions. Search forward
- from the given PC, then backward. */
- for (i = 0; i < 4; i++)
- {
- /* If we hit something with an unwind, stop searching this direction. */
+ This is the version for the PA64, in which later arguments appear
+ at higher addresses. (The stack always grows towards higher
+ addresses.)
- if (find_unwind_entry (pc + i * 4) != 0)
- break;
+ We simply allocate the appropriate amount of stack space and put
+ arguments into their proper slots.
- /* Check for ldsid (rp),r1 which is the magic instruction for a
- return from a cross-space function call. */
- if (read_memory_integer (pc + i * 4, 4) == 0x004010a1)
+ This ABI also requires that the caller provide an argument pointer
+ to the callee, so we do that too. */
+
+CORE_ADDR
+hppa64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
+ struct regcache *regcache, CORE_ADDR bp_addr,
+ int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr)
+{
+ /* NOTE: cagney/2004-02-27: This is a guess - its implemented by
+ reverse engineering testsuite failures. */
+
+ /* Stack base address at which any pass-by-reference parameters are
+ stored. */
+ CORE_ADDR struct_end = 0;
+ /* Stack base address at which the first parameter is stored. */
+ CORE_ADDR param_end = 0;
+
+ /* The inner most end of the stack after all the parameters have
+ been pushed. */
+ CORE_ADDR new_sp = 0;
+
+ /* Two passes. First pass computes the location of everything,
+ second pass writes the bytes out. */
+ int write_pass;
+ for (write_pass = 0; write_pass < 2; write_pass++)
+ {
+ CORE_ADDR struct_ptr = 0;
+ CORE_ADDR param_ptr = 0;
+ int i;
+ for (i = 0; i < nargs; i++)
+ {
+ struct value *arg = args[i];
+ struct type *type = check_typedef (VALUE_TYPE (arg));
+ if ((TYPE_CODE (type) == TYPE_CODE_INT
+ || TYPE_CODE (type) == TYPE_CODE_ENUM)
+ && TYPE_LENGTH (type) <= 8)
+ {
+ /* Integer value store, right aligned. "unpack_long"
+ takes care of any sign-extension problems. */
+ param_ptr += 8;
+ if (write_pass)
+ {
+ ULONGEST val = unpack_long (type, VALUE_CONTENTS (arg));
+ int reg = 27 - param_ptr / 8;
+ write_memory_unsigned_integer (param_end - param_ptr,
+ val, 8);
+ if (reg >= 19)
+ regcache_cooked_write_unsigned (regcache, reg, val);
+ }
+ }
+ else
+ {
+ /* Small struct value, store left aligned? */
+ int reg;
+ if (TYPE_LENGTH (type) > 8)
+ {
+ param_ptr = align_up (param_ptr, 16);
+ reg = 26 - param_ptr / 8;
+ param_ptr += align_up (TYPE_LENGTH (type), 16);
+ }
+ else
+ {
+ param_ptr = align_up (param_ptr, 8);
+ reg = 26 - param_ptr / 8;
+ param_ptr += align_up (TYPE_LENGTH (type), 8);
+ }
+ if (write_pass)
+ {
+ int byte;
+ write_memory (param_end - param_ptr, VALUE_CONTENTS (arg),
+ TYPE_LENGTH (type));
+ for (byte = 0; byte < TYPE_LENGTH (type); byte += 8)
+ {
+ if (reg >= 19)
+ {
+ int len = min (8, TYPE_LENGTH (type) - byte);
+ regcache_cooked_write_part (regcache, reg, 0, len,
+ VALUE_CONTENTS (arg) + byte);
+ }
+ reg--;
+ }
+ }
+ }
+ }
+ /* Update the various stack pointers. */
+ if (!write_pass)
{
- found_magic_instruction = 1;
- break;
+ struct_end = sp + struct_ptr;
+ /* PARAM_PTR 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. */
+ param_end = struct_end + max (align_up (param_ptr, 16), 64);
}
- /* Add code to handle long call/branch and argument relocation stubs
- here. */
}
- if (found_magic_instruction != 0)
- return 1;
+ /* If a structure has to be returned, set up register 28 to hold its
+ address */
+ if (struct_return)
+ write_register (28, struct_addr);
- /* Now look backward. */
- for (i = 0; i < 4; i++)
- {
- /* If we hit something with an unwind, stop searching this direction. */
+ /* Set the return address. */
+ regcache_cooked_write_unsigned (regcache, HPPA_RP_REGNUM, bp_addr);
- if (find_unwind_entry (pc - i * 4) != 0)
- break;
+ /* Update the Stack Pointer. */
+ regcache_cooked_write_unsigned (regcache, HPPA_SP_REGNUM, param_end + 64);
- /* Check for ldsid (rp),r1 which is the magic instruction for a
- 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. */
- }
- return found_magic_instruction;
+ /* The stack will have 32 bytes of additional space for a frame marker. */
+ return param_end + 64;
}
-static int
-find_return_regnum (CORE_ADDR pc)
+static CORE_ADDR
+hppa32_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
+ CORE_ADDR addr,
+ struct target_ops *targ)
{
- struct unwind_table_entry *u;
-
- u = find_unwind_entry (pc);
-
- if (!u)
- return RP_REGNUM;
+ if (addr & 2)
+ {
+ CORE_ADDR plabel;
- if (u->Millicode)
- return 31;
+ plabel = addr & ~3;
+ target_read_memory(plabel, (char *)&addr, 4);
+ }
- return RP_REGNUM;
+ return addr;
}
-/* Return size of frame, or -1 if we should use a frame pointer. */
-static int
-find_proc_framesize (CORE_ADDR pc)
+static CORE_ADDR
+hppa32_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
{
- struct unwind_table_entry *u;
- struct minimal_symbol *msym_us;
+ /* HP frames are 64-byte (or cache line) aligned (yes that's _byte_
+ and not _bit_)! */
+ return align_up (addr, 64);
+}
- /* This may indicate a bug in our callers... */
- if (pc == (CORE_ADDR) 0)
- return -1;
+/* Force all frames to 16-byte alignment. Better safe than sorry. */
- u = find_unwind_entry (pc);
+static CORE_ADDR
+hppa64_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ /* Just always 16-byte align. */
+ return align_up (addr, 16);
+}
- if (!u)
- {
- if (pc_in_linker_stub (pc))
- /* Linker stubs have a zero size frame. */
- return 0;
- else
- return -1;
- }
- msym_us = lookup_minimal_symbol_by_pc (pc);
+/* Get the PC from %r31 if currently in a syscall. Also mask out privilege
+ bits. */
+
+static CORE_ADDR
+hppa_target_read_pc (ptid_t ptid)
+{
+ int flags = read_register_pid (HPPA_FLAGS_REGNUM, ptid);
- /* 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)
- && msym_us
- && !PC_IN_SIGTRAMP (pc, DEPRECATED_SYMBOL_NAME (msym_us)))
- return -1;
+ /* 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, ptid) & ~0x3;
- return u->Total_frame_size << 3;
+ return read_register_pid (HPPA_PCOQ_HEAD_REGNUM, ptid) & ~0x3;
}
-/* Return offset from sp at which rp is saved, or 0 if not saved. */
-static int rp_saved (CORE_ADDR);
+/* Write out the PC. If currently in a syscall, then also write the new
+ PC value into %r31. */
-static int
-rp_saved (CORE_ADDR pc)
+static void
+hppa_target_write_pc (CORE_ADDR v, ptid_t ptid)
{
- struct unwind_table_entry *u;
+ int flags = read_register_pid (HPPA_FLAGS_REGNUM, ptid);
- /* A function at, and thus a return PC from, address 0? Not in HP-UX! */
- if (pc == (CORE_ADDR) 0)
- return 0;
-
- u = find_unwind_entry (pc);
+ /* The following test does not belong here. It is OS-specific, and belongs
+ in native code. */
+ /* If in a syscall, then set %r31. Also make sure to get the
+ privilege bits set correctly. */
+ /* Test SS_INSYSCALL */
+ if (flags & 2)
+ write_register_pid (31, v | 0x3, ptid);
- if (!u)
- {
- if (pc_in_linker_stub (pc))
- /* This is the so-called RP'. */
- return -24;
- else
- return 0;
- }
+ write_register_pid (HPPA_PCOQ_HEAD_REGNUM, v, ptid);
+ write_register_pid (HPPA_PCOQ_TAIL_REGNUM, v + 4, ptid);
+}
- if (u->Save_RP)
- return (TARGET_PTR_BIT == 64 ? -16 : -20);
- else if (u->stub_unwind.stub_type != 0)
- {
- switch (u->stub_unwind.stub_type)
- {
- case EXPORT:
- case IMPORT:
- return -24;
- case PARAMETER_RELOCATION:
- return -8;
- default:
- return 0;
- }
- }
- else
- return 0;
-}
-\f
-int
-hppa_frameless_function_invocation (struct frame_info *frame)
-{
- struct unwind_table_entry *u;
-
- u = find_unwind_entry (get_frame_pc (frame));
-
- if (u == 0)
- return 0;
-
- 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
-hppa_saved_pc_after_call (struct frame_info *frame)
-{
- int ret_regnum;
- CORE_ADDR pc;
- struct unwind_table_entry *u;
-
- 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 DEPRECATED_FRAME_SAVED_PC (frame);
- else
- return pc;
-}
-\f
-CORE_ADDR
-hppa_frame_saved_pc (struct frame_info *frame)
-{
- CORE_ADDR pc = get_frame_pc (frame);
- struct unwind_table_entry *u;
- 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 (get_frame_base (frame) + PC_REGNUM * 4,
- TARGET_PTR_BIT / 8) & ~0x3;
-
- if ((get_frame_pc (frame) >= get_frame_base (frame)
- && (get_frame_pc (frame)
- <= (get_frame_base (frame)
- /* A call dummy is sized in words, but it is actually a
- series of instructions. Account for that scaling
- factor. */
- + ((DEPRECATED_REGISTER_SIZE / INSTRUCTION_SIZE)
- * DEPRECATED_CALL_DUMMY_LENGTH)
- /* Similarly we have to account for 64bit wide register
- saves. */
- + (32 * DEPRECATED_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 * DEPRECATED_REGISTER_SIZE)))))
- {
- return read_memory_integer ((get_frame_base (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 ((get_frame_type (frame) == SIGTRAMP_FRAME))
- {
- CORE_ADDR rp;
- FRAME_SAVED_PC_IN_SIGTRAMP (frame, &rp);
- return rp & ~0x3;
- }
-#endif
-
- 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 (get_next_frame (frame)
- && ((get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME)
- || pc_in_interrupt_handler (get_frame_pc (get_next_frame (frame)))))
- {
- CORE_ADDR *saved_regs;
- hppa_frame_init_saved_regs (get_next_frame (frame));
- saved_regs = deprecated_get_frame_saved_regs (get_next_frame (frame));
- if (read_memory_integer (saved_regs[FLAGS_REGNUM],
- TARGET_PTR_BIT / 8) & 0x2)
- {
- pc = read_memory_integer (saved_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. */
- if (pc == get_frame_pc (frame))
- pc = read_memory_integer (saved_regs[RP_REGNUM],
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- else
- pc = read_memory_integer (saved_regs[RP_REGNUM],
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- else
- pc = read_register (ret_regnum) & ~0x3;
- }
- else
- {
- spun_around_loop = 0;
- old_pc = pc;
-
- 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. */
- if (rp_offset == 0
- && get_next_frame (frame)
- && ((get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME)
- || pc_in_interrupt_handler (get_frame_pc (get_next_frame (frame)))))
- {
- CORE_ADDR *saved_regs;
- hppa_frame_init_saved_regs (get_next_frame (frame));
- saved_regs = deprecated_get_frame_saved_regs (get_next_frame (frame));
- if (read_memory_integer (saved_regs[FLAGS_REGNUM],
- TARGET_PTR_BIT / 8) & 0x2)
- {
- pc = read_memory_integer (saved_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. */
- if (pc == get_frame_pc (frame))
- pc = read_memory_integer (saved_regs[RP_REGNUM],
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- else
- pc = read_memory_integer (saved_regs[RP_REGNUM],
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- else if (rp_offset == 0)
- {
- old_pc = pc;
- pc = read_register (RP_REGNUM) & ~0x3;
- }
- else
- {
- old_pc = pc;
- pc = read_memory_integer (get_frame_base (frame) + rp_offset,
- TARGET_PTR_BIT / 8) & ~0x3;
- }
- }
-
- /* If PC is inside a linker stub, then dig out the address the stub
- will return to.
-
- Don't do this for long branch stubs. Why? For some unknown reason
- _start is marked as a long branch stub in hpux10. */
- u = find_unwind_entry (pc);
- if (u && u->stub_unwind.stub_type != 0
- && u->stub_unwind.stub_type != LONG_BRANCH)
- {
- 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!.
-
- 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;
- }
- }
-
- return pc;
-}
-\f
-/* We need to correct the PC and the FP for the outermost frame when we are
- in a system call. */
-
-void
-hppa_init_extra_frame_info (int fromleaf, struct frame_info *frame)
-{
- int flags;
- int framesize;
-
- if (get_next_frame (frame) && !fromleaf)
- return;
-
- /* 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 (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). */
- if (framesize == -1)
- deprecated_update_frame_base_hack (frame, deprecated_read_fp ());
- else
- deprecated_update_frame_base_hack (frame, get_frame_base (frame) - framesize);
- return;
- }
-
- flags = read_register (FLAGS_REGNUM);
- if (flags & 2) /* In system call? */
- deprecated_update_frame_pc_hack (frame, read_register (31) & ~0x3);
-
- /* The outermost frame is always derived from PC-framesize
-
- One might think frameless innermost frames should have
- a frame->frame that is the same as the parent's frame->frame.
- That is wrong; frame->frame in that case should be the *high*
- address of the parent's frame. It's complicated as hell to
- 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 (get_frame_pc (frame));
- if (framesize == -1)
- deprecated_update_frame_base_hack (frame, deprecated_read_fp ());
- else
- deprecated_update_frame_base_hack (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 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
-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;
-
- /* 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. */
- CORE_ADDR *saved_regs = NULL;
-
- CORE_ADDR caller_pc;
-
- struct minimal_symbol *min_frame_symbol;
- 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 (get_frame_pc (frame));
- frame_symbol = find_pc_function (get_frame_pc (frame));
-
- 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 = 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 (get_frame_pc (frame)))
- frame_base = read_memory_integer (get_frame_base (frame) + SP_REGNUM * 4,
- TARGET_PTR_BIT / 8);
-#ifdef FRAME_BASE_BEFORE_SIGTRAMP
- else if ((get_frame_type (frame) == SIGTRAMP_FRAME))
- {
- FRAME_BASE_BEFORE_SIGTRAMP (frame, &frame_base);
- }
-#endif
- else
- frame_base = get_frame_base (frame);
-
- /* Get frame sizes for the current frame and the frame of the
- caller. */
- my_framesize = find_proc_framesize (get_frame_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
- this to be stack bottom. */
- if (caller_pc == (CORE_ADDR) 0)
- return (CORE_ADDR) 0;
-
- 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. */
- if (caller_framesize != -1)
- {
- return frame_base - caller_framesize;
- }
- /* Both caller and callee have frame pointers and are GCC compiled
- (SAVE_SP bit in unwind descriptor is on for both functions.
- 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, 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
- areas very differently.
-
- The previous frame pointer could be in a register, or in one of
- several areas on the stack.
-
- Walk from the current frame to the innermost frame examining
- unwind descriptors to determine if %r3 ever gets saved into the
- stack. If so return whatever value got saved into the stack.
- If it was never saved in the stack, then the value in %r3 is still
- valid, so use it.
-
- We use information from unwind descriptors to determine if %r3
- is saved into the stack (Entry_GR field has this information). */
-
- for (tmp_frame = frame; tmp_frame; tmp_frame = get_next_frame (tmp_frame))
- {
- u = find_unwind_entry (get_frame_pc (tmp_frame));
-
- if (!u)
- {
- /* We could find this information by examining prologues. I don't
- 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. */
-#if 0
- warning ("Unable to find unwind for PC 0x%x -- Help!", get_frame_pc (tmp_frame));
-#endif
- return (CORE_ADDR) 0;
- }
-
- if (u->Save_SP
- || (get_frame_type (tmp_frame) == SIGTRAMP_FRAME)
- || pc_in_interrupt_handler (get_frame_pc (tmp_frame)))
- break;
-
- /* 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. */
- hppa_frame_init_saved_regs (tmp_frame);
- saved_regs = deprecated_get_frame_saved_regs (tmp_frame);
- saved_regs_frame = tmp_frame;
-
- /* If we have an address for r3, that's good. */
- if (saved_regs[DEPRECATED_FP_REGNUM])
- break;
- }
- }
-
- if (tmp_frame)
- {
- /* We may have walked down the chain into a function with a frame
- pointer. */
- if (u->Save_SP
- && !(get_frame_type (tmp_frame) == SIGTRAMP_FRAME)
- && !pc_in_interrupt_handler (get_frame_pc (tmp_frame)))
- {
- return read_memory_integer (get_frame_base (tmp_frame), TARGET_PTR_BIT / 8);
- }
- /* %r3 was saved somewhere in the stack. Dig it out. */
- else
- {
- /* Sick.
-
- For optimization purposes many kernels don't have the
- callee saved registers into the save_state structure upon
- entry into the kernel for a syscall; the optimization
- 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).
-
- * 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
- the lack of register state in a core dump. It will
- fail miserably if the function which performs the
- system call has a variable sized stack frame. */
-
- if (tmp_frame != saved_regs_frame)
- {
- hppa_frame_init_saved_regs (tmp_frame);
- saved_regs = deprecated_get_frame_saved_regs (tmp_frame);
- }
-
- /* Abominable hack. */
- if (current_target.to_has_execution == 0
- && ((saved_regs[FLAGS_REGNUM]
- && (read_memory_integer (saved_regs[FLAGS_REGNUM],
- TARGET_PTR_BIT / 8)
- & 0x2))
- || (saved_regs[FLAGS_REGNUM] == 0
- && read_register (FLAGS_REGNUM) & 0x2)))
- {
- u = find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame));
- if (!u)
- {
- return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM],
- TARGET_PTR_BIT / 8);
- }
- else
- {
- return frame_base - (u->Total_frame_size << 3);
- }
- }
-
- return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM],
- TARGET_PTR_BIT / 8);
- }
- }
- else
- {
- /* Get the innermost frame. */
- tmp_frame = frame;
- while (get_next_frame (tmp_frame) != NULL)
- tmp_frame = get_next_frame (tmp_frame);
-
- if (tmp_frame != saved_regs_frame)
- {
- hppa_frame_init_saved_regs (tmp_frame);
- saved_regs = deprecated_get_frame_saved_regs (tmp_frame);
- }
-
- /* Abominable hack. See above. */
- if (current_target.to_has_execution == 0
- && ((saved_regs[FLAGS_REGNUM]
- && (read_memory_integer (saved_regs[FLAGS_REGNUM],
- TARGET_PTR_BIT / 8)
- & 0x2))
- || (saved_regs[FLAGS_REGNUM] == 0
- && read_register (FLAGS_REGNUM) & 0x2)))
- {
- u = find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame));
- if (!u)
- {
- return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM],
- TARGET_PTR_BIT / 8);
- }
- 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). */
- return deprecated_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 (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;
-
- u = find_unwind_entry (get_frame_pc (thisframe));
-
- if (u == NULL)
- return 1;
-
- /* We can't just check that the same of msym_us is "_start", because
- someone idiotically decided that they were going to make a Ltext_end
- symbol with the same address. This Ltext_end symbol is totally
- 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 (DEPRECATED_FRAME_SAVED_PC (thisframe));
- msym_start = lookup_minimal_symbol ("_start", NULL, NULL);
- if (msym_us
- && msym_start
- && SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start))
- return 0;
-
- /* Grrrr. Some new idiot decided that they don't want _start for the
- PRO configurations; $START$ calls main directly.... Deal with it. */
- msym_start = lookup_minimal_symbol ("$START$", NULL, NULL);
- if (msym_us
- && msym_start
- && SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start))
- return 0;
-
- next = get_next_frame (thisframe);
- if (next)
- next_u = find_unwind_entry (get_frame_pc (next));
-
- /* If this frame does not save SP, has no stack, isn't a stub,
- 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
- || (get_next_frame (thisframe) && (get_frame_type (get_next_frame (thisframe)) == SIGTRAMP_FRAME))
- || (next_u && next_u->HP_UX_interrupt_marker))
- return 1;
-
- if (pc_in_linker_stub (get_frame_pc (thisframe)))
- 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. */
-
-void
-hppa_push_dummy_frame (void)
-{
- CORE_ADDR sp, pc, pcspace;
- int regnum;
- CORE_ADDR int_buffer;
- double freg_buffer;
-
- pc = hppa_target_read_pc (inferior_ptid);
- int_buffer = read_register (FLAGS_REGNUM);
- if (int_buffer & 0x2)
- {
- const unsigned int sid = (pc >> 30) & 0x3;
- if (sid == 0)
- pcspace = read_register (SR4_REGNUM);
- else
- pcspace = read_register (SR4_REGNUM + 4 + sid);
- }
- 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;
-
- /* The 32bit and 64bit ABIs save the return pointer into different
- stack slots. */
- if (DEPRECATED_REGISTER_SIZE == 8)
- write_memory (sp - 16, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE);
- else
- write_memory (sp - 20, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE);
-
- int_buffer = deprecated_read_fp ();
- write_memory (sp, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE);
-
- write_register (DEPRECATED_FP_REGNUM, sp);
-
- sp += 2 * DEPRECATED_REGISTER_SIZE;
-
- for (regnum = 1; regnum < 32; regnum++)
- if (regnum != RP_REGNUM && regnum != DEPRECATED_FP_REGNUM)
- sp = push_word (sp, read_register (regnum));
-
- /* This is not necessary for the 64bit ABI. In fact it is dangerous. */
- if (DEPRECATED_REGISTER_SIZE != 8)
- sp += 4;
-
- for (regnum = FP0_REGNUM; regnum < NUM_REGS; regnum++)
- {
- deprecated_read_register_bytes (DEPRECATED_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));
- sp = push_word (sp, pc);
- sp = push_word (sp, pcspace);
- sp = push_word (sp, pc + 4);
- sp = push_word (sp, pcspace);
- write_register (SP_REGNUM, sp);
-}
-
-static void
-find_dummy_frame_regs (struct frame_info *frame,
- CORE_ADDR frame_saved_regs[])
-{
- CORE_ADDR fp = get_frame_base (frame);
- int i;
-
- /* The 32bit and 64bit ABIs save RP into different locations. */
- if (DEPRECATED_REGISTER_SIZE == 8)
- frame_saved_regs[RP_REGNUM] = (fp - 16) & ~0x3;
- else
- frame_saved_regs[RP_REGNUM] = (fp - 20) & ~0x3;
-
- frame_saved_regs[DEPRECATED_FP_REGNUM] = fp;
-
- frame_saved_regs[1] = fp + (2 * DEPRECATED_REGISTER_SIZE);
-
- for (fp += 3 * DEPRECATED_REGISTER_SIZE, i = 3; i < 32; i++)
- {
- if (i != DEPRECATED_FP_REGNUM)
- {
- frame_saved_regs[i] = fp;
- fp += DEPRECATED_REGISTER_SIZE;
- }
- }
-
- /* This is not necessary or desirable for the 64bit ABI. */
- if (DEPRECATED_REGISTER_SIZE != 8)
- fp += 4;
-
- for (i = FP0_REGNUM; i < NUM_REGS; i++, fp += 8)
- frame_saved_regs[i] = fp;
-
- frame_saved_regs[IPSW_REGNUM] = fp;
- frame_saved_regs[SAR_REGNUM] = fp + DEPRECATED_REGISTER_SIZE;
- frame_saved_regs[PCOQ_HEAD_REGNUM] = fp + 2 * DEPRECATED_REGISTER_SIZE;
- frame_saved_regs[PCSQ_HEAD_REGNUM] = fp + 3 * DEPRECATED_REGISTER_SIZE;
- frame_saved_regs[PCOQ_TAIL_REGNUM] = fp + 4 * DEPRECATED_REGISTER_SIZE;
- frame_saved_regs[PCSQ_TAIL_REGNUM] = fp + 5 * DEPRECATED_REGISTER_SIZE;
-}
-
-void
-hppa_pop_frame (void)
-{
- struct frame_info *frame = get_current_frame ();
- CORE_ADDR fp, npc, target_pc;
- int regnum;
- CORE_ADDR *fsr;
- double freg_buffer;
-
- fp = get_frame_base (frame);
- hppa_frame_init_saved_regs (frame);
- fsr = deprecated_get_frame_saved_regs (frame);
-
-#ifndef NO_PC_SPACE_QUEUE_RESTORE
- if (fsr[IPSW_REGNUM]) /* Restoring a call dummy frame */
- restore_pc_queue (fsr);
-#endif
-
- for (regnum = 31; regnum > 0; regnum--)
- if (fsr[regnum])
- write_register (regnum, read_memory_integer (fsr[regnum],
- DEPRECATED_REGISTER_SIZE));
-
- for (regnum = NUM_REGS - 1; regnum >= FP0_REGNUM; regnum--)
- if (fsr[regnum])
- {
- read_memory (fsr[regnum], (char *) &freg_buffer, 8);
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (regnum),
- (char *) &freg_buffer, 8);
- }
-
- if (fsr[IPSW_REGNUM])
- write_register (IPSW_REGNUM,
- read_memory_integer (fsr[IPSW_REGNUM],
- DEPRECATED_REGISTER_SIZE));
-
- if (fsr[SAR_REGNUM])
- write_register (SAR_REGNUM,
- read_memory_integer (fsr[SAR_REGNUM],
- DEPRECATED_REGISTER_SIZE));
-
- /* If the PC was explicitly saved, then just restore it. */
- if (fsr[PCOQ_TAIL_REGNUM])
- {
- npc = read_memory_integer (fsr[PCOQ_TAIL_REGNUM],
- DEPRECATED_REGISTER_SIZE);
- write_register (PCOQ_TAIL_REGNUM, npc);
- }
- /* Else use the value in %rp to set the new PC. */
- else
- {
- npc = read_register (RP_REGNUM);
- write_pc (npc);
- }
-
- write_register (DEPRECATED_FP_REGNUM, read_memory_integer (fp, DEPRECATED_REGISTER_SIZE));
-
- if (fsr[IPSW_REGNUM]) /* call dummy */
- write_register (SP_REGNUM, fp - 48);
- else
- write_register (SP_REGNUM, fp);
-
- /* The PC we just restored may be inside a return trampoline. If so
- we want to restart the inferior and run it through the trampoline.
-
- Do this by setting a momentary breakpoint at the location the
- trampoline returns to.
-
- Don't skip through the trampoline if we're popping a dummy frame. */
- target_pc = SKIP_TRAMPOLINE_CODE (npc & ~0x3) & ~0x3;
- if (target_pc && !fsr[IPSW_REGNUM])
- {
- struct symtab_and_line sal;
- struct breakpoint *breakpoint;
- 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. */
- sal = find_pc_line (target_pc, 0);
- sal.pc = target_pc;
- breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_finish);
- breakpoint->silent = 1;
-
- /* So we can clean things up. */
- old_chain = make_cleanup_delete_breakpoint (breakpoint);
-
- /* Start up the inferior. */
- clear_proceed_status ();
- proceed_to_finish = 1;
- proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
-
- /* Perform our cleanups. */
- do_cleanups (old_chain);
- }
- flush_cached_frames ();
-}
-
-/* After returning to a dummy on the stack, restore the instruction
- queue space registers. */
-
-static int
-restore_pc_queue (CORE_ADDR *fsr)
-{
- CORE_ADDR pc = read_pc ();
- CORE_ADDR new_pc = read_memory_integer (fsr[PCOQ_HEAD_REGNUM],
- TARGET_PTR_BIT / 8);
- struct target_waitstatus w;
- int insn_count;
-
- /* Advance past break instruction in the call dummy. */
- write_register (PCOQ_HEAD_REGNUM, pc + 4);
- write_register (PCOQ_TAIL_REGNUM, pc + 8);
-
- /* HPUX doesn't let us set the space registers or the space
- 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)
-
- So, load up the registers and single step until we are in the
- right place. */
-
- write_register (21, read_memory_integer (fsr[PCSQ_HEAD_REGNUM],
- DEPRECATED_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?). */
- resume (1, 0);
- 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",
- target_signal_to_name (stop_signal),
- target_signal_to_string (stop_signal));
- gdb_flush (gdb_stdout);
- return 0;
- }
- }
- target_terminal_ours ();
- target_fetch_registers (-1);
- return 1;
-}
-
-
-#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 (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));
-
- /* The value of SP as it was passed into this function after
- aligning. */
- CORE_ADDR orig_sp = DEPRECATED_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++)
- {
- 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) < DEPRECATED_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);
-
- /* Align the size of the argument to the word size for this
- target. */
- bytes_reserved = (lengths[i] + DEPRECATED_REGISTER_SIZE - 1) & -DEPRECATED_REGISTER_SIZE;
-
- 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*DEPRECATED_REGISTER_SIZE-1)
- & -(2*DEPRECATED_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;
- }
-
- /* 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 = DEPRECATED_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 (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);
-
- /* 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;
-}
-
-#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 (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));
-
- /* 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]));
-
- /* Align the size of the argument to the word size for this
- target. */
- bytes_reserved = (lengths[i] + DEPRECATED_REGISTER_SIZE - 1) & -DEPRECATED_REGISTER_SIZE;
-
- offset[i] = (cum_bytes_reserved
- + (lengths[i] > 4 ? bytes_reserved : lengths[i]));
-
- /* If the argument is a double word argument, then it needs to be
- double word aligned. */
- if ((bytes_reserved == 2 * DEPRECATED_REGISTER_SIZE)
- && (offset[i] % 2 * DEPRECATED_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 * DEPRECATED_REGISTER_SIZE - 1)
- & -(2 * DEPRECATED_REGISTER_SIZE));
-
- if ((new_offset - offset[i]) >= 2 * DEPRECATED_REGISTER_SIZE)
- {
- bytes_reserved += DEPRECATED_REGISTER_SIZE;
- offset[i] += DEPRECATED_REGISTER_SIZE;
- }
- }
-
- cum_bytes_reserved += bytes_reserved;
-
- }
-
- /* 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 = DEPRECATED_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.
- ?!? 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 (struct_return)
- write_register (28, struct_addr);
-
- /* The stack will have 32 bytes of additional space for a frame marker. */
- return sp + 32;
-}
-
-#endif
-
-/* 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 */
-
-CORE_ADDR
-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;
- struct value **args;
- struct value *funcval;
- struct value *val;
-
- int x, namelen, err_value, tmp = -1;
- CORE_ADDR endo_buff_addr, value_return_addr, errno_return_addr;
- CORE_ADDR stub_addr;
-
-
- 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_DOMAIN, NULL, NULL);
- buff_minsym = lookup_minimal_symbol ("__buffer", NULL, NULL);
- msymbol = lookup_minimal_symbol ("__shldp", NULL, NULL);
- symbol2 = lookup_symbol ("__shldp", NULL, VAR_DOMAIN, 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));
-
- /* do alignment */
- if ((x = value_return_addr % 64) != 0)
- value_return_addr = value_return_addr + 64 - x;
-
- errno_return_addr = value_return_addr + 64;
-
-
- /* set up stuff needed by __d_shl_get in buffer in end.o */
-
- target_write_memory (endo_buff_addr, DEPRECATED_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[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 int
-cover_find_stub_with_shl_get (void *args_untyped)
-{
- 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 DEPRECATED_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.
-
- 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 = 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");
-
- 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 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,
- DEPRECATED_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,
- TARGET_PTR_BIT / 8);
- }
- else
- {
-
-#ifndef GDB_TARGET_IS_PA_ELF
- /* 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;
- CORE_ADDR newfun = 0;
-
- funsymbol = lookup_minimal_symbol_by_pc (fun);
- if (!funsymbol)
- 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_solib_trampoline
- (DEPRECATED_SYMBOL_NAME (funsymbol), 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 == 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
- }
-
- /* 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;
-
- /* 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 (solib_handle)
- {
- struct minimal_symbol *fmsymbol = lookup_minimal_symbol_by_pc (fun);
-
- 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");
- 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;
- }
- }
-
- /* Store upper 21 bits of function address into ldil. fun will either be
- the final target (most cases) or __d_plt_call when calling into a shared
- library and __gcc_plt_call is not available. */
- store_unsigned_integer
- (&dummy[FUNC_LDIL_OFFSET],
- INSTRUCTION_SIZE,
- deposit_21 (fun >> 11,
- extract_unsigned_integer (&dummy[FUNC_LDIL_OFFSET],
- INSTRUCTION_SIZE)));
-
- /* Store lower 11 bits of function address into ldo */
- store_unsigned_integer
- (&dummy[FUNC_LDO_OFFSET],
- INSTRUCTION_SIZE,
- deposit_14 (fun & MASK_11,
- extract_unsigned_integer (&dummy[FUNC_LDO_OFFSET],
- INSTRUCTION_SIZE)));
-#ifdef SR4EXPORT_LDIL_OFFSET
-
- {
- CORE_ADDR trampoline_addr;
-
- /* We may still need sr4export's address too. */
-
- if (trampoline == NULL)
- {
- msymbol = lookup_minimal_symbol ("_sr4export", NULL, NULL);
- if (msymbol == NULL)
- error ("Can't find an address for _sr4export trampoline");
-
- trampoline_addr = SYMBOL_VALUE_ADDRESS (msymbol);
- }
- else
- trampoline_addr = SYMBOL_VALUE_ADDRESS (trampoline);
-
-
- /* Store upper 21 bits of trampoline's address into ldil */
- store_unsigned_integer
- (&dummy[SR4EXPORT_LDIL_OFFSET],
- INSTRUCTION_SIZE,
- deposit_21 (trampoline_addr >> 11,
- extract_unsigned_integer (&dummy[SR4EXPORT_LDIL_OFFSET],
- INSTRUCTION_SIZE)));
-
- /* Store lower 11 bits of trampoline's address into ldo */
- store_unsigned_integer
- (&dummy[SR4EXPORT_LDO_OFFSET],
- INSTRUCTION_SIZE,
- deposit_14 (trampoline_addr & MASK_11,
- extract_unsigned_integer (&dummy[SR4EXPORT_LDO_OFFSET],
- INSTRUCTION_SIZE)));
- }
-#endif
-
- write_register (22, pc);
-
- /* If we are in a syscall, then we should call the stack dummy
- directly. $$dyncall is not needed as the kernel sets up the
- space id registers properly based on the value in %r31. In
- fact calling $$dyncall will not work because the value in %r22
- will be clobbered on the syscall exit path.
-
- Similarly if the current PC is in a shared library. Note however,
- this scheme won't work if the shared library isn't mapped into
- the same space as the stack. */
- if (flags & 2)
- return pc;
-#ifndef GDB_TARGET_IS_PA_ELF
- 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
-hppa_read_fp (int pid)
-{
- int flags = read_register (FLAGS_REGNUM);
-
- if (flags & 2)
- {
- return (CORE_ADDR) 0;
- }
-
- /* This is the only site that may directly read_register () the FP
- register. All others must use deprecated_read_fp (). */
- return read_register (DEPRECATED_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
-hppa_target_read_pc (ptid_t ptid)
-{
- 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, ptid) & ~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
-hppa_target_write_pc (CORE_ADDR v, ptid_t ptid)
-{
- int flags = read_register_pid (FLAGS_REGNUM, ptid);
-
- /* The following test does not belong here. It is OS-specific, and belongs
- in native code. */
- /* If in a syscall, then set %r31. Also make sure to get the
- privilege bits set correctly. */
- /* Test SS_INSYSCALL */
- if (flags & 2)
- write_register_pid (31, v | 0x3, ptid);
-
- write_register_pid (PC_REGNUM, v, ptid);
- write_register_pid (DEPRECATED_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 (struct type *type)
-{
- int max_align, align, i;
- CHECK_TYPEDEF (type);
- switch (TYPE_CODE (type))
- {
- case TYPE_CODE_PTR:
- case TYPE_CODE_INT:
- case TYPE_CODE_FLT:
- return TYPE_LENGTH (type);
- case TYPE_CODE_ARRAY:
- return hppa_alignof (TYPE_FIELD_TYPE (type, 0));
- case TYPE_CODE_STRUCT:
- case TYPE_CODE_UNION:
- max_align = 1;
- for (i = 0; i < TYPE_NFIELDS (type); i++)
- {
- /* Bit fields have no real alignment. */
- /* if (!TYPE_FIELD_BITPOS (type, i)) */
- 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);
- }
- }
- return max_align;
- default:
- return 4;
- }
-}
-
-/* Print the register regnum, or all registers if regnum is -1 */
-
-void
-pa_do_registers_info (int regnum, int fpregs)
-{
- char *raw_regs = alloca (DEPRECATED_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++)
- frame_register_read (deprecated_selected_frame, i,
- raw_regs + DEPRECATED_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 %lx\n", REGISTER_NAME (regnum), reg_val[1]);
- }
- else
- {
- /* 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. */
- pa_print_fp_reg (regnum);
-}
-
-/********** new function ********************/
-void
-pa_do_strcat_registers_info (int regnum, int fpregs, struct ui_file *stream,
- enum precision_type precision)
-{
- char *raw_regs = alloca (DEPRECATED_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++)
- frame_register_read (deprecated_selected_frame, i,
- raw_regs + DEPRECATED_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]);
-
- if (!is_pa_2)
- {
- fprintf_unfiltered (stream, "%s %lx", REGISTER_NAME (regnum), reg_val[1]);
- }
- else
- {
- /* 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. */
- pa_strcat_fp_reg (regnum, stream, precision);
-}
-
-/* If this is a PA2.0 machine, fetch the real 64-bit register
- value. Otherwise use the info from gdb's saved register area.
-
- Note that reg_val is really expected to be an array of longs,
- with two elements. */
-static void
-pa_register_look_aside (char *raw_regs, int regnum, long *raw_val)
-{
- static int know_which = 0; /* False */
-
- int regaddr;
- unsigned int offset;
- int i;
- int start;
-
-
- char buf[MAX_REGISTER_SIZE];
- 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 */
- }
-
- raw_val[0] = 0;
- raw_val[1] = 0;
-
- if (!is_pa_2)
- {
- raw_val[1] = *(long *) (raw_regs + DEPRECATED_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)
- {
- /* Use narrow regs area of save_state and default macro. */
- 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);
-
- 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. */
-#if HAVE_STRUCT_SAVE_STATE_T == 1 && HAVE_STRUCT_MEMBER_SS_WIDE == 1
- save_state_t temp;
-
- offset = ((int) &temp.ss_wide) - ((int) &temp);
- regaddr = offset + regnum * 8;
- start = 0;
-#endif
- }
-
- for (i = start; i < 2; i++)
- {
- errno = 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
- kernel doesn't let us at the registers. */
- char *err = safe_strerror (errno);
- char *msg = alloca (strlen (err) + 128);
- sprintf (msg, "reading register %s: %s", REGISTER_NAME (regnum), err);
- warning (msg);
- goto error_exit;
- }
-
- regaddr += sizeof (long);
- }
-
- if (regnum == PCOQ_HEAD_REGNUM || regnum == PCOQ_TAIL_REGNUM)
- raw_val[1] &= ~0x3; /* I think we're masking out space bits */
-
-error_exit:
- ;
-}
-
-/* "Info all-reg" command */
-
-static void
-pa_print_registers (char *raw_regs, int regnum, int fpregs)
-{
- 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 < rows; i++)
- {
- for (j = 0; j < columns; j++)
- {
- /* 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 */
- pa_print_fp_reg (i);
-}
-
-/************* new function ******************/
-static void
-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 */
- long long_val;
- enum precision_type precision;
-
- precision = unspecified_precision;
-
- for (i = 0; i < 18; i++)
- {
- 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: %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 */
- pa_strcat_fp_reg (i, stream, precision);
-}
-
-static void
-pa_print_fp_reg (int i)
-{
- char raw_buffer[MAX_REGISTER_SIZE];
- char virtual_buffer[MAX_REGISTER_SIZE];
-
- /* Get 32bits of data. */
- frame_register_read (deprecated_selected_frame, i, raw_buffer);
-
- /* Put it in the buffer. No conversions are ever necessary. */
- memcpy (virtual_buffer, raw_buffer, DEPRECATED_REGISTER_RAW_SIZE (i));
-
- fputs_filtered (REGISTER_NAME (i), gdb_stdout);
- print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), gdb_stdout);
- fputs_filtered ("(single precision) ", gdb_stdout);
-
- val_print (DEPRECATED_REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, gdb_stdout, 0,
- 1, 0, Val_pretty_default);
- printf_filtered ("\n");
-
- /* If "i" is even, then this register can also be a double-precision
- FP register. Dump it out as such. */
- if ((i % 2) == 0)
- {
- /* Get the data in raw format for the 2nd half. */
- frame_register_read (deprecated_selected_frame, i + 1, raw_buffer);
-
- /* Copy it into the appropriate part of the virtual buffer. */
- memcpy (virtual_buffer + DEPRECATED_REGISTER_RAW_SIZE (i), raw_buffer,
- DEPRECATED_REGISTER_RAW_SIZE (i));
-
- /* Dump it as a double. */
- fputs_filtered (REGISTER_NAME (i), gdb_stdout);
- print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), gdb_stdout);
- fputs_filtered ("(double precision) ", gdb_stdout);
-
- val_print (builtin_type_double, virtual_buffer, 0, 0, gdb_stdout, 0,
- 1, 0, Val_pretty_default);
- printf_filtered ("\n");
- }
-}
-
-/*************** new function ***********************/
-static void
-pa_strcat_fp_reg (int i, struct ui_file *stream, enum precision_type precision)
-{
- char raw_buffer[MAX_REGISTER_SIZE];
- char virtual_buffer[MAX_REGISTER_SIZE];
-
- fputs_filtered (REGISTER_NAME (i), stream);
- print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), stream);
-
- /* Get 32bits of data. */
- frame_register_read (deprecated_selected_frame, i, raw_buffer);
-
- /* Put it in the buffer. No conversions are ever necessary. */
- memcpy (virtual_buffer, raw_buffer, DEPRECATED_REGISTER_RAW_SIZE (i));
-
- if (precision == double_precision && (i % 2) == 0)
- {
-
- char raw_buf[MAX_REGISTER_SIZE];
-
- /* 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 + DEPRECATED_REGISTER_RAW_SIZE (i), raw_buf,
- DEPRECATED_REGISTER_RAW_SIZE (i));
-
- val_print (builtin_type_double, virtual_buffer, 0, 0, stream, 0,
- 1, 0, Val_pretty_default);
-
- }
- else
- {
- val_print (DEPRECATED_REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, stream, 0,
- 1, 0, Val_pretty_default);
- }
-
-}
-
-/* Return one if PC is in the call path of a trampoline, else return zero.
-
- Note we return one for *any* call trampoline (long-call, arg-reloc), not
- just shared library trampolines (import, export). */
-
-int
-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;
-
-#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 (bfd_get_section_vma (sec->owner, sec) <= pc
- && pc < (bfd_get_section_vma (sec->owner, sec)
- + bfd_section_size (sec->owner, sec)))
- 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)
- {
- minsym = lookup_minimal_symbol ("$$dyncall", NULL, NULL);
- if (minsym)
- dyncall = SYMBOL_VALUE_ADDRESS (minsym);
- else
- dyncall = -1;
- }
-
- if (!sr4export)
- {
- minsym = lookup_minimal_symbol ("_sr4export", NULL, NULL);
- if (minsym)
- sr4export = SYMBOL_VALUE_ADDRESS (minsym);
- else
- sr4export = -1;
- }
-
- 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);
- if (!u)
- return 0;
-
- /* If this isn't a linker stub, then return now. */
- if (u->stub_unwind.stub_type == 0)
- return 0;
-
- /* By definition a long-branch stub is a call stub. */
- if (u->stub_unwind.stub_type == LONG_BRANCH)
- return 1;
-
- /* The call and return path execute the same instructions within
- an IMPORT stub! So an IMPORT stub is both a call and return
- trampoline. */
- if (u->stub_unwind.stub_type == IMPORT)
- return 1;
-
- /* Parameter relocation stubs always have a call path and may have a
- return path. */
- if (u->stub_unwind.stub_type == PARAMETER_RELOCATION
- || u->stub_unwind.stub_type == EXPORT)
- {
- CORE_ADDR addr;
-
- /* Search forward from the current PC until we hit a branch
- or the end of the stub. */
- for (addr = pc; addr <= u->region_end; addr += 4)
- {
- unsigned long insn;
-
- insn = read_memory_integer (addr, 4);
-
- /* Does it look like a bl? If so then it's the call path, if
- we find a bv or be first, then we're on the return path. */
- if ((insn & 0xfc00e000) == 0xe8000000)
- return 1;
- else if ((insn & 0xfc00e001) == 0xe800c000
- || (insn & 0xfc000000) == 0xe0000000)
- return 0;
- }
-
- /* Should never happen. */
- warning ("Unable to find branch in parameter relocation stub.\n");
- return 0;
- }
-
- /* Unknown stub type. For now, just return zero. */
- return 0;
-}
-
-/* Return one if PC is in the return path of a trampoline, else return zero.
-
- Note we return one for *any* call trampoline (long-call, arg-reloc), not
- just shared library trampolines (import, export). */
-
-int
-hppa_in_solib_return_trampoline (CORE_ADDR pc, char *name)
-{
- struct unwind_table_entry *u;
-
- /* Get the unwind descriptor corresponding to PC, return zero
- if no unwind was found. */
- u = find_unwind_entry (pc);
- if (!u)
- return 0;
-
- /* If this isn't a linker stub or it's just a long branch stub, then
- return zero. */
- if (u->stub_unwind.stub_type == 0 || u->stub_unwind.stub_type == LONG_BRANCH)
- return 0;
-
- /* The call and return path execute the same instructions within
- an IMPORT stub! So an IMPORT stub is both a call and return
- trampoline. */
- if (u->stub_unwind.stub_type == IMPORT)
- return 1;
-
- /* Parameter relocation stubs always have a call path and may have a
- return path. */
- if (u->stub_unwind.stub_type == PARAMETER_RELOCATION
- || u->stub_unwind.stub_type == EXPORT)
- {
- CORE_ADDR addr;
-
- /* Search forward from the current PC until we hit a branch
- or the end of the stub. */
- for (addr = pc; addr <= u->region_end; addr += 4)
- {
- unsigned long insn;
-
- insn = read_memory_integer (addr, 4);
-
- /* Does it look like a bl? If so then it's the call path, if
- we find a bv or be first, then we're on the return path. */
- if ((insn & 0xfc00e000) == 0xe8000000)
- return 0;
- else if ((insn & 0xfc00e001) == 0xe800c000
- || (insn & 0xfc000000) == 0xe0000000)
- return 1;
- }
-
- /* Should never happen. */
- warning ("Unable to find branch in parameter relocation stub.\n");
- return 0;
- }
-
- /* Unknown stub type. For now, just return zero. */
- return 0;
-
-}
-
-/* Figure out if PC is in a trampoline, and if so find out where
- the trampoline will jump to. If not in a trampoline, return zero.
-
- Simple code examination probably is not a good idea since the code
- sequences in trampolines can also appear in user code.
-
- We use unwinds and information from the minimal symbol table to
- determine when we're in a trampoline. This won't work for ELF
- (yet) since it doesn't create stub unwind entries. Whether or
- not ELF will create stub unwinds or normal unwinds for linker
- stubs is still being debated.
-
- This should handle simple calls through dyncall or sr4export,
- long calls, argument relocation stubs, and dyncall/sr4export
- calling an argument relocation stub. It even handles some stubs
- used in dynamic executables. */
+/* return the alignment of a type in bytes. Structures have the maximum
+ alignment required by their fields. */
-CORE_ADDR
-hppa_skip_trampoline_code (CORE_ADDR pc)
+static int
+hppa_alignof (struct type *type)
{
- long orig_pc = pc;
- long prev_inst, curr_inst, loc;
- static CORE_ADDR dyncall = 0;
- static CORE_ADDR dyncall_external = 0;
- static CORE_ADDR sr4export = 0;
- struct minimal_symbol *msym;
- struct unwind_table_entry *u;
-
- /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
- new exec file */
-
- if (!dyncall)
- {
- msym = lookup_minimal_symbol ("$$dyncall", NULL, NULL);
- if (msym)
- dyncall = SYMBOL_VALUE_ADDRESS (msym);
- else
- dyncall = -1;
- }
-
- if (!dyncall_external)
- {
- msym = lookup_minimal_symbol ("$$dyncall_external", NULL, NULL);
- if (msym)
- dyncall_external = SYMBOL_VALUE_ADDRESS (msym);
- else
- dyncall_external = -1;
- }
-
- if (!sr4export)
- {
- msym = lookup_minimal_symbol ("_sr4export", NULL, NULL);
- if (msym)
- sr4export = SYMBOL_VALUE_ADDRESS (msym);
- else
- sr4export = -1;
- }
-
- /* Addresses passed to dyncall may *NOT* be the actual address
- of the function. So we may have to do something special. */
- if (pc == 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. */
- if (pc & 0x2)
- 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, TARGET_PTR_BIT / 8);
- }
- else if (pc == sr4export)
- pc = (CORE_ADDR) (read_register (22));
-
- /* Get the unwind descriptor corresponding to PC, return zero
- if no unwind was found. */
- u = find_unwind_entry (pc);
- if (!u)
- return 0;
-
- /* If this isn't a linker stub, then return now. */
- /* elz: attention here! (FIXME) because of a compiler/linker
- error, some stubs which should have a non zero stub_unwind.stub_type
- have unfortunately a value of zero. So this function would return here
- as if we were not in a trampoline. To fix this, we go look at the partial
- symbol information, which reports this guy as a stub.
- (FIXME): Unfortunately, we are not that lucky: it turns out that the
- partial symbol information is also wrong sometimes. This is because
- when it is entered (somread.c::som_symtab_read()) it can happen that
- if the type of the symbol (from the som) is Entry, and the symbol is
- in a shared library, then it can also be a trampoline. This would
- be OK, except that I believe the way they decide if we are ina shared library
- does not work. SOOOO..., even if we have a regular function w/o trampolines
- 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. */
- 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
- && DEPRECATED_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.
- Most (all?) other branches can be determined by examining the contents
- of certain registers and the stack. */
-
- loc = pc;
- curr_inst = 0;
- prev_inst = 0;
- while (1)
+ int max_align, align, i;
+ CHECK_TYPEDEF (type);
+ switch (TYPE_CODE (type))
{
- /* Make sure we haven't walked outside the range of this stub. */
- if (u != find_unwind_entry (loc))
- {
- warning ("Unable to find branch in linker stub");
- return orig_pc == pc ? 0 : pc & ~0x3;
- }
-
- prev_inst = curr_inst;
- 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. */
- if ((curr_inst & 0xffe0e000) == 0xe0202000)
- {
- /* Yup. See if the previous instruction loaded
- a value into %r1. If so compute and return the jump address. */
- if ((prev_inst & 0xffe00000) == 0x20200000)
- return (extract_21 (prev_inst) + extract_17 (curr_inst)) & ~0x3;
- else
- {
- warning ("Unable to find ldil X,%%r1 before ble Y(%%sr4,%%r1).");
- return orig_pc == pc ? 0 : pc & ~0x3;
- }
- }
-
- /* Does it look like a be 0(sr0,%r21)? OR
- Does it look like a be, n 0(sr0,%r21)? OR
- 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.
-
- 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.
-
- 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. */
- if ((curr_inst == 0xe2a00000) ||
- (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%lx", loc);
- return orig_pc == pc ? 0 : pc & ~0x3;
- }
-
- libsym = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (stubsym), NULL, NULL);
- if (libsym == NULL)
- {
- warning ("Unable to find library symbol for %s\n",
- DEPRECATED_SYMBOL_NAME (stubsym));
- return orig_pc == pc ? 0 : pc & ~0x3;
- }
-
- return SYMBOL_VALUE (libsym);
- }
-
- /* 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 */
- else if ((curr_inst & 0xffe0e000) == 0xe8400000
- || (curr_inst & 0xffe0e000) == 0xe8000000
- || (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) */
- else if ((curr_inst & 0xffe0f000) == 0xe840c000)
+ case TYPE_CODE_PTR:
+ case TYPE_CODE_INT:
+ case TYPE_CODE_FLT:
+ return TYPE_LENGTH (type);
+ case TYPE_CODE_ARRAY:
+ return hppa_alignof (TYPE_FIELD_TYPE (type, 0));
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ max_align = 1;
+ for (i = 0; i < TYPE_NFIELDS (type); i++)
{
- /* Yup. See if the previous instruction loaded
- rp from sp - 8. */
- if (prev_inst == 0x4bc23ff1)
- return (read_memory_integer
- (read_register (SP_REGNUM) - 8, 4)) & ~0x3;
- else
+ /* Bit fields have no real alignment. */
+ /* if (!TYPE_FIELD_BITPOS (type, i)) */
+ if (!TYPE_FIELD_BITSIZE (type, i)) /* elz: this should be bitsize */
{
- warning ("Unable to find restore of %%rp before bv (%%rp).");
- return orig_pc == pc ? 0 : pc & ~0x3;
+ align = hppa_alignof (TYPE_FIELD_TYPE (type, i));
+ max_align = max (max_align, align);
}
}
-
- /* elz: added this case to capture the new instruction
- at the end of the return part of an export stub used by
- the PA2.0: BVE, n (rp) */
- else if ((curr_inst & 0xffe0f000) == 0xe840d000)
- {
- 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. */
- 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, TARGET_PTR_BIT / 8)) & ~0x3;
- }
-
- /* Haven't found the branch yet, but we're still in the stub.
- Keep looking. */
- loc += 4;
+ return max_align;
+ default:
+ return 4;
}
}
-
/* For the given instruction (INST), return any adjustment it makes
to the stack pointer or zero for no adjustment.
/* The most common way to perform a stack adjustment ldo X(sp),sp */
if ((inst & 0xffffc000) == 0x37de0000)
- return extract_14 (inst);
+ return hppa_extract_14 (inst);
/* stwm X,D(sp) */
if ((inst & 0xffe00000) == 0x6fc00000)
- return extract_14 (inst);
+ return hppa_extract_14 (inst);
/* std,ma X,D(sp) */
if ((inst & 0xffe00008) == 0x73c00008)
save high bits in save_high21 for later use. */
if ((inst & 0xffe00000) == 0x28200000)
{
- save_high21 = extract_21 (inst);
+ save_high21 = hppa_extract_21 (inst);
return 0;
}
if ((inst & 0xffff0000) == 0x343e0000)
- return save_high21 + extract_14 (inst);
+ return save_high21 + hppa_extract_14 (inst);
/* fstws as used by the HP compilers. */
if ((inst & 0xffffffe0) == 0x2fd01220)
- return extract_5_load (inst);
+ return hppa_extract_5_load (inst);
/* No adjustment. */
return 0;
|| (inst >> 26) == 0x1f
|| ((inst >> 26) == 0x1f
&& ((inst >> 6) == 0xa)))
- return extract_5R_store (inst);
+ return hppa_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);
+ return hppa_extract_5R_store (inst);
/* Does it look like a stwm? GCC & HPC may use this in prologues. */
if ((inst >> 26) == 0x1b)
- return extract_5R_store (inst);
+ return hppa_extract_5R_store (inst);
/* Does it look like sth or stb? HPC versions 9.0 and later use these
too. */
|| ((inst >> 26) == 0x3
&& (((inst >> 6) & 0xf) == 0x8
|| (inst >> 6) & 0xf) == 0x9))
- return extract_5R_store (inst);
+ return hppa_extract_5R_store (inst);
return 0;
}
{
/* is this an FSTD ? */
if ((inst & 0xfc00dfc0) == 0x2c001200)
- return extract_5r_store (inst);
+ return hppa_extract_5r_store (inst);
if ((inst & 0xfc000002) == 0x70000002)
- return extract_5R_store (inst);
+ return hppa_extract_5R_store (inst);
/* is this an FSTW ? */
if ((inst & 0xfc00df80) == 0x24001200)
- return extract_5r_store (inst);
+ return hppa_extract_5r_store (inst);
if ((inst & 0xfc000002) == 0x7c000000)
- return extract_5R_store (inst);
+ return hppa_extract_5R_store (inst);
return 0;
}
for (i = 3; i < u->Entry_GR + 3; i++)
{
/* Frame pointer gets saved into a special location. */
- if (u->Save_SP && i == DEPRECATED_FP_REGNUM)
+ if (u->Save_SP && i == HPPA_FP_REGNUM)
continue;
save_gr |= (1 << i);
old_save_sp = save_sp;
old_stack_remaining = stack_remaining;
- status = target_read_memory (pc, buf, 4);
+ status = deprecated_read_memory_nobpt (pc, buf, 4);
inst = extract_unsigned_integer (buf, 4);
/* Yow! */
while (reg_num >= (TARGET_PTR_BIT == 64 ? 19 : 23) && reg_num <= 26)
{
pc += 4;
- status = target_read_memory (pc, buf, 4);
+ status = deprecated_read_memory_nobpt (pc, buf, 4);
inst = extract_unsigned_integer (buf, 4);
if (status != 0)
return pc;
reg_num = inst_saves_fr (inst);
save_fr &= ~(1 << reg_num);
- status = target_read_memory (pc + 4, buf, 4);
+ status = deprecated_read_memory_nobpt (pc + 4, buf, 4);
next_inst = extract_unsigned_integer (buf, 4);
/* Yow! */
while (reg_num >= 4 && reg_num <= (TARGET_PTR_BIT == 64 ? 11 : 7))
{
pc += 8;
- status = target_read_memory (pc, buf, 4);
+ status = deprecated_read_memory_nobpt (pc, buf, 4);
inst = extract_unsigned_integer (buf, 4);
if (status != 0)
return pc;
if ((inst & 0xfc000000) != 0x34000000)
break;
- status = target_read_memory (pc + 4, buf, 4);
+ status = deprecated_read_memory_nobpt (pc + 4, buf, 4);
next_inst = extract_unsigned_integer (buf, 4);
if (status != 0)
return pc;
Currently we must not skip more on the alpha, but we might the lenient
stuff some day. */
-CORE_ADDR
+static CORE_ADDR
hppa_skip_prologue (CORE_ADDR pc)
{
unsigned long inst;
return (skip_prologue_hard_way (pc));
}
-/* Put here the code to store, into the SAVED_REGS, the addresses of
- the saved registers of frame described by FRAME_INFO. This
- includes special registers such as pc and fp saved in special ways
- in the stack frame. sp is even more special: the address we return
- for it IS the sp for the next frame. */
+struct hppa_frame_cache
+{
+ CORE_ADDR base;
+ struct trad_frame_saved_reg *saved_regs;
+};
-void
-hppa_frame_find_saved_regs (struct frame_info *frame_info,
- CORE_ADDR frame_saved_regs[])
+static struct hppa_frame_cache *
+hppa_frame_cache (struct frame_info *next_frame, void **this_cache)
{
- CORE_ADDR pc;
+ struct hppa_frame_cache *cache;
+ long saved_gr_mask;
+ long saved_fr_mask;
+ CORE_ADDR this_sp;
+ long frame_size;
struct unwind_table_entry *u;
- unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp;
- int status, i, reg;
- char buf[4];
- int fp_loc = -1;
- int final_iteration;
-
- /* Zero out everything. */
- memset (frame_saved_regs, '\0', SIZEOF_FRAME_SAVED_REGS);
-
- /* Call dummy frames always look the same, so there's no need to
- examine the dummy code to determine locations of saved registers;
- instead, let find_dummy_frame_regs fill in the correct offsets
- for the saved registers. */
- if ((get_frame_pc (frame_info) >= get_frame_base (frame_info)
- && (get_frame_pc (frame_info)
- <= (get_frame_base (frame_info)
- /* A call dummy is sized in words, but it is actually a
- series of instructions. Account for that scaling
- factor. */
- + ((DEPRECATED_REGISTER_SIZE / INSTRUCTION_SIZE)
- * DEPRECATED_CALL_DUMMY_LENGTH)
- /* Similarly we have to account for 64bit wide register
- saves. */
- + (32 * DEPRECATED_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 * DEPRECATED_REGISTER_SIZE)))))
- find_dummy_frame_regs (frame_info, frame_saved_regs);
-
- /* Interrupt handlers are special too. They lay out the register
- state in the exact same order as the register numbers in GDB. */
- if (pc_in_interrupt_handler (get_frame_pc (frame_info)))
- {
- for (i = 0; i < NUM_REGS; i++)
- {
- /* SP is a little special. */
- if (i == SP_REGNUM)
- frame_saved_regs[SP_REGNUM]
- = read_memory_integer (get_frame_base (frame_info) + SP_REGNUM * 4,
- TARGET_PTR_BIT / 8);
- else
- frame_saved_regs[i] = get_frame_base (frame_info) + i * 4;
- }
- return;
- }
+ CORE_ADDR prologue_end;
+ int i;
+
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "{ hppa_frame_cache (frame=%d) -> ",
+ frame_relative_level(next_frame));
-#ifdef FRAME_FIND_SAVED_REGS_IN_SIGTRAMP
- /* Handle signal handler callers. */
- if ((get_frame_type (frame_info) == SIGTRAMP_FRAME))
+ if ((*this_cache) != NULL)
{
- FRAME_FIND_SAVED_REGS_IN_SIGTRAMP (frame_info, frame_saved_regs);
- return;
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "base=0x%s (cached) }",
+ paddr_nz (((struct hppa_frame_cache *)*this_cache)->base));
+ return (*this_cache);
}
-#endif
-
- /* Get the starting address of the function referred to by the PC
- saved in frame. */
- pc = get_frame_func (frame_info);
+ cache = FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache);
+ (*this_cache) = cache;
+ cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
/* Yow! */
- u = find_unwind_entry (pc);
+ u = find_unwind_entry (frame_func_unwind (next_frame));
if (!u)
- return;
-
- /* This is how much of a frame adjustment we need to account for. */
- stack_remaining = u->Total_frame_size << 3;
-
- /* Magic register saves we want to know about. */
- save_rp = u->Save_RP;
- save_sp = u->Save_SP;
+ {
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "base=NULL (no unwind entry) }");
+ return (*this_cache);
+ }
/* Turn the Entry_GR field into a bitmask. */
- save_gr = 0;
+ saved_gr_mask = 0;
for (i = 3; i < u->Entry_GR + 3; i++)
{
/* Frame pointer gets saved into a special location. */
- if (u->Save_SP && i == DEPRECATED_FP_REGNUM)
+ if (u->Save_SP && i == HPPA_FP_REGNUM)
continue;
-
- save_gr |= (1 << i);
+
+ saved_gr_mask |= (1 << i);
}
/* Turn the Entry_FR field into a bitmask too. */
- save_fr = 0;
+ saved_fr_mask = 0;
for (i = 12; i < u->Entry_FR + 12; i++)
- save_fr |= (1 << i);
-
- /* The frame always represents the value of %sp at entry to the
- current function (and is thus equivalent to the "saved" stack
- pointer. */
- frame_saved_regs[SP_REGNUM] = get_frame_base (frame_info);
+ saved_fr_mask |= (1 << i);
/* Loop until we find everything of interest or hit a branch.
Some unexpected things are expected with debugging optimized code, so
we allow this routine to walk past user instructions in optimized
GCC code. */
- final_iteration = 0;
- while ((save_gr || save_fr || save_rp || save_sp || stack_remaining > 0)
- && pc <= get_frame_pc (frame_info))
- {
- status = target_read_memory (pc, buf, 4);
- inst = extract_unsigned_integer (buf, 4);
-
- /* Yow! */
- if (status != 0)
- return;
-
- /* Note the interesting effects of this instruction. */
- stack_remaining -= prologue_inst_adjust_sp (inst);
-
- /* 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[RP_REGNUM] = get_frame_base (frame_info) - 20;
- }
- else if (inst == 0x0fc212c1) /* std rp,-0x10(sr0,sp) */
- {
- save_rp = 0;
- frame_saved_regs[RP_REGNUM] = get_frame_base (frame_info) - 16;
- }
-
- /* 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[DEPRECATED_FP_REGNUM] = get_frame_base (frame_info);
- save_sp = 0;
- }
-
- /* Account for general and floating-point register saves. */
- reg = inst_saves_gr (inst);
- if (reg >= 3 && reg <= 18
- && (!u->Save_SP || reg != DEPRECATED_FP_REGNUM))
- {
- save_gr &= ~(1 << reg);
-
- /* stwm with a positive displacement is a *post modify*. */
- if ((inst >> 26) == 0x1b
- && extract_14 (inst) >= 0)
- frame_saved_regs[reg] = get_frame_base (frame_info);
- /* A std has explicit post_modify forms. */
- else if ((inst & 0xfc00000c0) == 0x70000008)
- frame_saved_regs[reg] = get_frame_base (frame_info);
- 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[reg]
- = get_frame_base (frame_info) + offset;
- else
- frame_saved_regs[reg]
- = (get_frame_base (frame_info) + (u->Total_frame_size << 3)
- + offset);
- }
- }
+ {
+ int final_iteration = 0;
+ CORE_ADDR pc, end_pc;
+ int looking_for_sp = u->Save_SP;
+ int looking_for_rp = u->Save_RP;
+ int fp_loc = -1;
+
+ /* We have to use hppa_skip_prologue instead of just
+ skip_prologue_using_sal, in case we stepped into a function without
+ symbol information. hppa_skip_prologue also bounds the returned
+ pc by the passed in pc, so it will not return a pc in the next
+ function. */
+ prologue_end = hppa_skip_prologue (frame_func_unwind (next_frame));
+ end_pc = frame_pc_unwind (next_frame);
+
+ if (prologue_end != 0 && end_pc > prologue_end)
+ end_pc = prologue_end;
+
+ frame_size = 0;
+
+ for (pc = frame_func_unwind (next_frame);
+ ((saved_gr_mask || saved_fr_mask
+ || looking_for_sp || looking_for_rp
+ || frame_size < (u->Total_frame_size << 3))
+ && pc < end_pc);
+ pc += 4)
+ {
+ int reg;
+ char buf4[4];
+ long status = deprecated_read_memory_nobpt (pc, buf4, sizeof buf4);
+ long inst = extract_unsigned_integer (buf4, sizeof buf4);
+ /* Note the interesting effects of this instruction. */
+ frame_size += prologue_inst_adjust_sp (inst);
+
+ /* There are limited ways to store the return pointer into the
+ stack. */
+ if (inst == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
+ {
+ looking_for_rp = 0;
+ cache->saved_regs[HPPA_RP_REGNUM].addr = -20;
+ }
+ else if (inst == 0x0fc212c1) /* std rp,-0x10(sr0,sp) */
+ {
+ looking_for_rp = 0;
+ cache->saved_regs[HPPA_RP_REGNUM].addr = -16;
+ }
+
+ /* Check to see 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) */
+ {
+ looking_for_sp = 0;
+ cache->saved_regs[HPPA_FP_REGNUM].addr = 0;
+ }
+
+ /* Account for general and floating-point register saves. */
+ reg = inst_saves_gr (inst);
+ if (reg >= 3 && reg <= 18
+ && (!u->Save_SP || reg != HPPA_FP_REGNUM))
+ {
+ saved_gr_mask &= ~(1 << reg);
+ if ((inst >> 26) == 0x1b && hppa_extract_14 (inst) >= 0)
+ /* stwm with a positive displacement is a _post_
+ _modify_. */
+ cache->saved_regs[reg].addr = 0;
+ else if ((inst & 0xfc00000c) == 0x70000008)
+ /* A std has explicit post_modify forms. */
+ cache->saved_regs[reg].addr = 0;
+ else
+ {
+ CORE_ADDR offset;
+
+ if ((inst >> 26) == 0x1c)
+ offset = (inst & 0x1 ? -1 << 13 : 0) | (((inst >> 4) & 0x3ff) << 3);
+ else if ((inst >> 26) == 0x03)
+ offset = hppa_low_hppa_sign_extend (inst & 0x1f, 5);
+ else
+ offset = hppa_extract_14 (inst);
+
+ /* Handle code with and without frame pointers. */
+ if (u->Save_SP)
+ cache->saved_regs[reg].addr = offset;
+ else
+ cache->saved_regs[reg].addr = (u->Total_frame_size << 3) + offset;
+ }
+ }
- /* GCC handles callee saved FP regs a little differently.
+ /* 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. */
+
+ /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
+ if ((inst & 0xffffc000) == 0x34610000
+ || (inst & 0xffffc000) == 0x37c10000)
+ fp_loc = hppa_extract_14 (inst);
+
+ reg = inst_saves_fr (inst);
+ if (reg >= 12 && reg <= 21)
+ {
+ /* Note +4 braindamage below is necessary because the FP
+ status registers are internally 8 registers rather than
+ the expected 4 registers. */
+ saved_fr_mask &= ~(1 << reg);
+ 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. */
+ cache->saved_regs[reg + HPPA_FP4_REGNUM + 4].addr = 0;
+ fp_loc = 8;
+ }
+ else
+ {
+ cache->saved_regs[reg + HPPA_FP0_REGNUM + 4].addr = fp_loc;
+ fp_loc += 8;
+ }
+ }
+
+ /* 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;
+ }
+ }
- HP CC emits them at the current stack pointer modifying
- the stack pointer as it stores each register. */
+ {
+ /* The frame base always represents the value of %sp at entry to
+ the current function (and is thus equivalent to the "saved"
+ stack pointer. */
+ CORE_ADDR this_sp = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM);
+ CORE_ADDR fp;
+
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, " (this_sp=0x%s, pc=0x%s, "
+ "prologue_end=0x%s) ",
+ paddr_nz (this_sp),
+ paddr_nz (frame_pc_unwind (next_frame)),
+ paddr_nz (prologue_end));
+
+ /* Check to see if a frame pointer is available, and use it for
+ frame unwinding if it is.
+
+ There are some situations where we need to rely on the frame
+ pointer to do stack unwinding. For example, if a function calls
+ alloca (), the stack pointer can get adjusted inside the body of
+ the function. In this case, the ABI requires that the compiler
+ maintain a frame pointer for the function.
+
+ The unwind record has a flag (alloca_frame) that indicates that
+ a function has a variable frame; unfortunately, gcc/binutils
+ does not set this flag. Instead, whenever a frame pointer is used
+ and saved on the stack, the Save_SP flag is set. We use this to
+ decide whether to use the frame pointer for unwinding.
+
+ fp may be zero if it is not available in an inner frame because
+ it has been modified by not yet saved.
+
+ TODO: For the HP compiler, maybe we should use the alloca_frame flag
+ instead of Save_SP. */
+
+ fp = frame_unwind_register_unsigned (next_frame, HPPA_FP_REGNUM);
+
+ if (frame_pc_unwind (next_frame) >= prologue_end
+ && u->Save_SP && fp != 0)
+ {
+ cache->base = fp;
+
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, " (base=0x%s) [frame pointer] }",
+ paddr_nz (cache->base));
+ }
+ else if (u->Save_SP
+ && trad_frame_addr_p (cache->saved_regs, HPPA_SP_REGNUM))
+ {
+ /* Both we're expecting the SP to be saved and the SP has been
+ saved. The entry SP value is saved at this frame's SP
+ address. */
+ cache->base = read_memory_integer (this_sp, TARGET_PTR_BIT / 8);
+
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, " (base=0x%s) [saved] }",
+ paddr_nz (cache->base));
+ }
+ else
+ {
+ /* The prologue has been slowly allocating stack space. Adjust
+ the SP back. */
+ cache->base = this_sp - frame_size;
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, " (base=0x%s) [unwind adjust] } ",
+ paddr_nz (cache->base));
- /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
- if ((inst & 0xffffc000) == 0x34610000
- || (inst & 0xffffc000) == 0x37c10000)
- fp_loc = extract_14 (inst);
+ }
+ trad_frame_set_value (cache->saved_regs, HPPA_SP_REGNUM, cache->base);
+ }
- reg = inst_saves_fr (inst);
- if (reg >= 12 && reg <= 21)
+ /* The PC is found in the "return register", "Millicode" uses "r31"
+ as the return register while normal code uses "rp". */
+ if (u->Millicode)
+ {
+ if (trad_frame_addr_p (cache->saved_regs, 31))
+ cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] = cache->saved_regs[31];
+ else
{
- /* Note +4 braindamage below is necessary because the FP status
- registers are internally 8 registers rather than the expected
- 4 registers. */
- save_fr &= ~(1 << reg);
- 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. */
- frame_saved_regs[reg + FP4_REGNUM + 4] = get_frame_base (frame_info);
- fp_loc = 8;
- }
- else
- {
- frame_saved_regs[reg + FP0_REGNUM + 4]
- = get_frame_base (frame_info) + fp_loc;
- fp_loc += 8;
- }
+ ULONGEST r31 = frame_unwind_register_unsigned (next_frame, 31);
+ trad_frame_set_value (cache->saved_regs, HPPA_PCOQ_HEAD_REGNUM, r31);
+ }
+ }
+ else
+ {
+ if (trad_frame_addr_p (cache->saved_regs, HPPA_RP_REGNUM))
+ cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] = cache->saved_regs[HPPA_RP_REGNUM];
+ else
+ {
+ ULONGEST rp = frame_unwind_register_unsigned (next_frame, HPPA_RP_REGNUM);
+ trad_frame_set_value (cache->saved_regs, HPPA_PCOQ_HEAD_REGNUM, rp);
}
+ }
- /* Quit if we hit any kind of branch the previous iteration. */
- if (final_iteration)
- break;
+ /* If the frame pointer was not saved in this frame, but we should be saving
+ it, set it to an invalid value so that another frame will not pick up the
+ wrong frame pointer. This can happen if we start unwinding after the
+ frame pointer has been modified, but before we've saved it to the
+ stack. */
+ if (u->Save_SP && !trad_frame_addr_p (cache->saved_regs, HPPA_FP_REGNUM))
+ trad_frame_set_value (cache->saved_regs, HPPA_FP_REGNUM, 0);
- /* We want to look precisely one instruction beyond the branch
- if we have not found everything yet. */
- if (is_branch (inst))
- final_iteration = 1;
+ {
+ /* Convert all the offsets into addresses. */
+ int reg;
+ for (reg = 0; reg < NUM_REGS; reg++)
+ {
+ if (trad_frame_addr_p (cache->saved_regs, reg))
+ cache->saved_regs[reg].addr += cache->base;
+ }
+ }
- /* Bump the PC. */
- pc += 4;
- }
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "base=0x%s }",
+ paddr_nz (((struct hppa_frame_cache *)*this_cache)->base));
+ return (*this_cache);
}
-/* XXX - deprecated. This is a compatibility function for targets
- that do not yet implement DEPRECATED_FRAME_INIT_SAVED_REGS. */
-/* Find the addresses in which registers are saved in FRAME. */
+static void
+hppa_frame_this_id (struct frame_info *next_frame, void **this_cache,
+ struct frame_id *this_id)
+{
+ struct hppa_frame_cache *info = hppa_frame_cache (next_frame, this_cache);
+ (*this_id) = frame_id_build (info->base, frame_func_unwind (next_frame));
+}
-void
-hppa_frame_init_saved_regs (struct frame_info *frame)
+static void
+hppa_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, void *valuep)
{
- if (deprecated_get_frame_saved_regs (frame) == NULL)
- frame_saved_regs_zalloc (frame);
- hppa_frame_find_saved_regs (frame, deprecated_get_frame_saved_regs (frame));
+ struct hppa_frame_cache *info = hppa_frame_cache (next_frame, this_cache);
+ hppa_frame_prev_register_helper (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
}
-/* Exception handling support for the HP-UX ANSI C++ compiler.
- The compiler (aCC) provides a callback for exception events;
- GDB can set a breakpoint on this callback and find out what
- 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_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;
-
-/* Is exception-handling support available with this executable? */
-static int hp_cxx_exception_support = 0;
-/* Has the initialize function been run? */
-int hp_cxx_exception_support_initialized = 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 = 0;
-/* Address of __d_eh_notify_callback */
-static CORE_ADDR eh_notify_callback_addr = 0;
-/* Address of __d_eh_break */
-static CORE_ADDR eh_break_addr = 0;
-/* Address of __d_eh_catch_catch */
-static CORE_ADDR eh_catch_catch_addr = 0;
-/* Address of __d_eh_catch_throw */
-static CORE_ADDR eh_catch_throw_addr = 0;
-/* Sal for __d_eh_break */
-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 */
-int
-setup_d_pid_in_inferior (void)
+static const struct frame_unwind hppa_frame_unwind =
{
- CORE_ADDR anaddr;
- struct minimal_symbol *msymbol;
- char buf[4]; /* FIXME 32x64? */
+ NORMAL_FRAME,
+ hppa_frame_this_id,
+ hppa_frame_prev_register
+};
- /* 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)
- {
- warning ("Unable to find __d_pid symbol in object file.");
- warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
- return 1;
- }
+static const struct frame_unwind *
+hppa_frame_unwind_sniffer (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
- anaddr = SYMBOL_VALUE_ADDRESS (msymbol);
- 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).");
- return 1;
- }
- return 0;
-}
+ if (find_unwind_entry (pc))
+ return &hppa_frame_unwind;
-/* Initialize exception catchpoint support by looking for the
- necessary hooks/callbacks in end.o, etc., and set the hook value to
- point to the required debug function
+ return NULL;
+}
- Return 0 => failure
- 1 => success */
+/* This is a generic fallback frame unwinder that kicks in if we fail all
+ the other ones. Normally we would expect the stub and regular unwinder
+ to work, but in some cases we might hit a function that just doesn't
+ have any unwind information available. In this case we try to do
+ unwinding solely based on code reading. This is obviously going to be
+ slow, so only use this as a last resort. Currently this will only
+ identify the stack and pc for the frame. */
-static int
-initialize_hp_cxx_exception_support (void)
+static struct hppa_frame_cache *
+hppa_fallback_frame_cache (struct frame_info *next_frame, void **this_cache)
{
- struct symtabs_and_lines sals;
- struct cleanup *old_chain;
- struct cleanup *canonical_strings_chain = NULL;
- int i;
- 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;
- asection *shlib_info;
+ struct hppa_frame_cache *cache;
+ unsigned int frame_size;
+ CORE_ADDR pc, start_pc, end_pc, cur_pc;
- /* Detect and disallow recursion. On HP-UX with aCC, infinite
- recursion is a possibility because finding the hook for exception
- 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)
- {
- hp_cxx_exception_support_initialized = 0;
- exception_support_initialized = 0;
- return 0;
- }
+ cache = FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache);
+ (*this_cache) = cache;
+ cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
- hp_cxx_exception_support = 0;
+ pc = frame_func_unwind (next_frame);
+ cur_pc = frame_pc_unwind (next_frame);
+ frame_size = 0;
- /* First check if we have seen any HP compiled objects; if not,
- it is very unlikely that HP's idiosyncratic callback mechanism
- for exception handling debug support will be available!
- This will percolate back up to breakpoint.c, where our callers
- will decide to try the g++ exception-handling support instead. */
- if (!hp_som_som_object_present)
- return 0;
+ find_pc_partial_function (pc, NULL, &start_pc, &end_pc);
- /* We have a SOM executable with SOM debug info; find the hooks */
-
- /* First look for the notify hook provided by aCC runtime libs */
- /* If we find this symbol, we conclude that the executable must
- have HP aCC exception support built in. If this symbol is not
- found, even though we're a HP SOM-SOM file, we may have been
- built with some other compiler (not aCC). This results percolates
- back up to our callers in breakpoint.c which can decide to
- try the g++ style of exception support instead.
- 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)
+ if (start_pc == 0 || end_pc == 0)
{
- eh_notify_hook_addr = SYMBOL_VALUE_ADDRESS (msym);
- hp_cxx_exception_support = 1;
+ error ("Cannot find bounds of current function (@0x%s), unwinding will "
+ "fail.", paddr_nz (pc));
+ return cache;
}
- else
+
+ if (end_pc > cur_pc)
+ end_pc = cur_pc;
+
+ for (pc = start_pc; pc < end_pc; pc += 4)
{
- warning ("Unable to find exception callback hook (%s).", HP_ACC_EH_notify_hook);
- warning ("Executable may not have been compiled debuggable with HP aCC.");
- warning ("GDB will be unable to intercept exception events.");
- eh_notify_hook_addr = 0;
- hp_cxx_exception_support = 0;
- return 0;
+ unsigned int insn;
+
+ insn = read_memory_unsigned_integer (pc, 4);
+
+ frame_size += prologue_inst_adjust_sp (insn);
+
+ /* There are limited ways to store the return pointer into the
+ stack. */
+ if (insn == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
+ cache->saved_regs[HPPA_RP_REGNUM].addr = -20;
+ else if (insn == 0x0fc212c1) /* std rp,-0x10(sr0,sp) */
+ cache->saved_regs[HPPA_RP_REGNUM].addr = -16;
}
- /* 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 */
- msym = lookup_minimal_symbol (HP_ACC_EH_notify_callback, NULL, NULL);
- if (msym)
+ cache->base = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM) - frame_size;
+ trad_frame_set_value (cache->saved_regs, HPPA_SP_REGNUM, cache->base);
+
+ if (trad_frame_addr_p (cache->saved_regs, HPPA_RP_REGNUM))
{
- eh_notify_callback_addr = SYMBOL_VALUE_ADDRESS (msym);
- hp_cxx_exception_support = 1;
+ cache->saved_regs[HPPA_RP_REGNUM].addr += cache->base;
+ cache->saved_regs[HPPA_PCOQ_HEAD_REGNUM] = cache->saved_regs[HPPA_RP_REGNUM];
}
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).");
- warning ("GDB will be unable to intercept exception events.");
- eh_notify_callback_addr = 0;
- return 0;
+ ULONGEST rp = frame_unwind_register_unsigned (next_frame, HPPA_RP_REGNUM);
+ trad_frame_set_value (cache->saved_regs, HPPA_PCOQ_HEAD_REGNUM, rp);
}
-#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
- with shared libraries, we have to do more work to find the plabel, which
- 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 */
- shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$");
- if (shlib_info && (bfd_section_size (symfile_objfile->obfd, shlib_info) != 0))
- {
- /* The minsym we have has the local code address, but that's not the
- 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. */
+ return cache;
+}
- args_for_find_stub args;
- static char message[] = "Error while finding exception callback hook:\n";
+static void
+hppa_fallback_frame_this_id (struct frame_info *next_frame, void **this_cache,
+ struct frame_id *this_id)
+{
+ struct hppa_frame_cache *info =
+ hppa_fallback_frame_cache (next_frame, this_cache);
+ (*this_id) = frame_id_build (info->base, frame_func_unwind (next_frame));
+}
- args.solib_handle = som_solib_get_solib_by_pc (eh_notify_callback_addr);
- args.msym = msym;
- args.return_val = 0;
+static void
+hppa_fallback_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, void *valuep)
+{
+ struct hppa_frame_cache *info =
+ hppa_fallback_frame_cache (next_frame, this_cache);
+ hppa_frame_prev_register_helper (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
+}
- recurse++;
- catch_errors (cover_find_stub_with_shl_get, &args, message,
- RETURN_MASK_ALL);
- eh_notify_callback_addr = args.return_val;
- recurse--;
+static const struct frame_unwind hppa_fallback_frame_unwind =
+{
+ NORMAL_FRAME,
+ hppa_fallback_frame_this_id,
+ hppa_fallback_frame_prev_register
+};
- exception_catchpoints_are_fragile = 1;
+static const struct frame_unwind *
+hppa_fallback_unwind_sniffer (struct frame_info *next_frame)
+{
+ return &hppa_fallback_frame_unwind;
+}
- 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;
- }
- }
- else
- exception_catchpoints_are_fragile = 0;
-#endif
+/* Stub frames, used for all kinds of call stubs. */
+struct hppa_stub_unwind_cache
+{
+ CORE_ADDR base;
+ struct trad_frame_saved_reg *saved_regs;
+};
- /* Now, look for the breakpointable routine in end.o */
- /* 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);
- warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
- warning ("GDB will be unable to intercept exception events.");
- eh_break_addr = 0;
- return 0;
- }
+static struct hppa_stub_unwind_cache *
+hppa_stub_frame_unwind_cache (struct frame_info *next_frame,
+ void **this_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct hppa_stub_unwind_cache *info;
+ struct unwind_table_entry *u;
- /* Next look for the catch enable flag provided in end.o */
- sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL,
- VAR_DOMAIN, 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. */
- {
- 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;
- }
- 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;
- }
- }
+ if (*this_cache)
+ return *this_cache;
- /* Next look for the catch enable flag provided end.o */
- sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL,
- VAR_DOMAIN, 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. */
+ info = FRAME_OBSTACK_ZALLOC (struct hppa_stub_unwind_cache);
+ *this_cache = info;
+ info->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+
+ info->base = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM);
+
+ if (gdbarch_osabi (gdbarch) == GDB_OSABI_HPUX_SOM)
{
- 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;
- }
- else
+ /* HPUX uses export stubs in function calls; the export stub clobbers
+ the return value of the caller, and, later restores it from the
+ stack. */
+ u = find_unwind_entry (frame_pc_unwind (next_frame));
+
+ if (u && u->stub_unwind.stub_type == EXPORT)
{
- 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;
+ info->saved_regs[HPPA_PCOQ_HEAD_REGNUM].addr = info->base - 24;
+
+ return info;
}
}
- /* Set the flags */
- hp_cxx_exception_support = 2; /* everything worked so far */
- hp_cxx_exception_support_initialized = 1;
- exception_support_initialized = 1;
+ /* By default we assume that stubs do not change the rp. */
+ info->saved_regs[HPPA_PCOQ_HEAD_REGNUM].realreg = HPPA_RP_REGNUM;
- return 1;
+ return info;
}
-/* Target operation for enabling or disabling interception of
- exception events.
- KIND is either EX_EVENT_THROW or EX_EVENT_CATCH
- ENABLE is either 0 (disable) or 1 (enable).
- 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. */
-
-struct symtab_and_line *
-child_enable_exception_callback (enum exception_event_kind kind, int enable)
+static void
+hppa_stub_frame_this_id (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ struct frame_id *this_id)
{
- char buf[4];
-
- if (!exception_support_initialized || !hp_cxx_exception_support_initialized)
- if (!initialize_hp_cxx_exception_support ())
- return NULL;
+ struct hppa_stub_unwind_cache *info
+ = hppa_stub_frame_unwind_cache (next_frame, this_prologue_cache);
+ *this_id = frame_id_build (info->base, frame_pc_unwind (next_frame));
+}
- 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 */
- }
+static void
+hppa_stub_frame_prev_register (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, void *valuep)
+{
+ struct hppa_stub_unwind_cache *info
+ = hppa_stub_frame_unwind_cache (next_frame, this_prologue_cache);
+ hppa_frame_prev_register_helper (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
+}
- /* Set the EH hook to point to the callback routine */
- 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 */
- {
- 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;
- }
- if (enable)
- {
- /* 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.");
- return (struct symtab_and_line *) -1;
- }
- }
+static const struct frame_unwind hppa_stub_frame_unwind = {
+ NORMAL_FRAME,
+ hppa_stub_frame_this_id,
+ hppa_stub_frame_prev_register
+};
- 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:
- error ("Request to enable unknown or unsupported exception event.");
- }
+static const struct frame_unwind *
+hppa_stub_unwind_sniffer (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
- /* 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);
- break_callback_sal->symtab = NULL;
- break_callback_sal->pc = eh_break_addr;
- break_callback_sal->line = 0;
- break_callback_sal->end = eh_break_addr;
+ if (pc == 0
+ || IN_SOLIB_CALL_TRAMPOLINE (pc, NULL)
+ || IN_SOLIB_RETURN_TRAMPOLINE (pc, NULL))
+ return &hppa_stub_frame_unwind;
+ return NULL;
+}
- return break_callback_sal;
+static struct frame_id
+hppa_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_id_build (frame_unwind_register_unsigned (next_frame,
+ HPPA_SP_REGNUM),
+ frame_pc_unwind (next_frame));
}
-/* 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};
-
-/* 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 */
-struct exception_event_record *
-child_get_current_exception_event (void)
+static CORE_ADDR
+hppa_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
- 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 ();
- if (!curr_frame)
- return (struct exception_event_record *) NULL;
-
- /* Go up one frame to __d_eh_notify_callback, because at the
- point when this code is executed, there's garbage in the
- arguments of __d_eh_break. */
- fi = find_relative_frame (curr_frame, &level);
- if (level != 0)
- return (struct exception_event_record *) NULL;
-
- 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);
- 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.
- 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 */
- 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);
- throw_addr = get_frame_pc (fi);
-
- /* Go back to original (top) frame */
- 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);
- current_ex_event.catch_sal = find_pc_line (catch_addr, 1);
-
- return ¤t_ex_event;
+ return frame_unwind_register_signed (next_frame, HPPA_PCOQ_HEAD_REGNUM) & ~3;
}
/* Instead of this nasty cast, add a method pvoid() that prints out a
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 (HPPA_PCOQ_HEAD_REGNUM, read_register (HPPA_PCOQ_TAIL_REGNUM));
+ write_register (HPPA_PCSQ_HEAD_REGNUM, read_register (HPPA_PCSQ_TAIL_REGNUM));
- write_register (PCOQ_TAIL_REGNUM, read_register (PCOQ_TAIL_REGNUM) + 4);
+ write_register (HPPA_PCOQ_TAIL_REGNUM, read_register (HPPA_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
-hppa32_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 (DEPRECATED_REGISTER_BYTE (28)
- + (TYPE_LENGTH (type) > 4
- ? (8 - TYPE_LENGTH (type))
- : (4 - TYPE_LENGTH (type))),
- valbuf, TYPE_LENGTH (type));
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (FP4_REGNUM),
- valbuf, TYPE_LENGTH (type));
-}
-
-/* Same as hppa32_store_return_value(), but for the PA64 ABI. */
-
-void
-hppa64_store_return_value (struct type *type, char *valbuf)
-{
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- deprecated_write_register_bytes
- (DEPRECATED_REGISTER_BYTE (FP4_REGNUM)
- + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type),
- valbuf, TYPE_LENGTH (type));
- else if (is_integral_type(type))
- deprecated_write_register_bytes
- (DEPRECATED_REGISTER_BYTE (28)
- + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type),
- valbuf, TYPE_LENGTH (type));
- else if (TYPE_LENGTH (type) <= 8)
- deprecated_write_register_bytes
- (DEPRECATED_REGISTER_BYTE (28),valbuf, TYPE_LENGTH (type));
- else if (TYPE_LENGTH (type) <= 16)
- {
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (28),valbuf, 8);
- deprecated_write_register_bytes
- (DEPRECATED_REGISTER_BYTE (29), valbuf + 8, TYPE_LENGTH (type) - 8);
- }
-}
-
-/* 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
-hppa32_extract_return_value (struct type *type, char *regbuf, char *valbuf)
-{
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (FP4_REGNUM), TYPE_LENGTH (type));
- else
- memcpy (valbuf,
- (regbuf
- + DEPRECATED_REGISTER_BYTE (28)
- + (TYPE_LENGTH (type) > 4
- ? (8 - TYPE_LENGTH (type))
- : (4 - TYPE_LENGTH (type)))),
- TYPE_LENGTH (type));
-}
-
-/* Same as hppa32_extract_return_value but for the PA64 ABI case. */
-
-void
-hppa64_extract_return_value (struct type *type, char *regbuf, char *valbuf)
-{
- /* RM: Floats are returned in FR4R, doubles in FR4.
- Integral values are in r28, padded on the left.
- Aggregates less that 65 bits are in r28, right padded.
- Aggregates upto 128 bits are in r28 and r29, right padded. */
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- memcpy (valbuf,
- regbuf + DEPRECATED_REGISTER_BYTE (FP4_REGNUM)
- + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type),
- TYPE_LENGTH (type));
- else if (is_integral_type(type))
- memcpy (valbuf,
- regbuf + DEPRECATED_REGISTER_BYTE (28)
- + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type),
- TYPE_LENGTH (type));
- else if (TYPE_LENGTH (type) <= 8)
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (28),
- TYPE_LENGTH (type));
- else if (TYPE_LENGTH (type) <= 16)
- {
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (28), 8);
- memcpy (valbuf + 8, regbuf + DEPRECATED_REGISTER_BYTE (29),
- TYPE_LENGTH (type) - 8);
- }
-}
-
-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
-hppa32_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);
-}
-
-CORE_ADDR
-hppa64_stack_align (CORE_ADDR sp)
-{
- /* The PA64 ABI mandates a 16 byte stack alignment. */
- return ((sp % 16) ? (sp + 15) & -16 : sp);
-}
-
int
hppa_pc_requires_run_before_use (CORE_ADDR pc)
{
/* 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);
+ const int ipsw = (int) read_register (HPPA_IPSW_REGNUM);
+ const int flags = (int) read_register (HPPA_FLAGS_REGNUM);
return ((ipsw & 0x00200000) && !(flags & 0x2));
}
-int
-hppa_register_raw_size (int reg_nr)
-{
- /* All registers have the same size. */
- return DEPRECATED_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)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
-
- return reg_nr * tdep->bytes_per_address;
-}
-
/* Return the GDB type object for the "standard" data type of data
in register N. */
-struct type *
-hppa32_register_virtual_type (int reg_nr)
+static struct type *
+hppa32_register_type (struct gdbarch *gdbarch, int reg_nr)
{
- if (reg_nr < FP4_REGNUM)
- return builtin_type_int;
+ if (reg_nr < HPPA_FP4_REGNUM)
+ return builtin_type_uint32;
else
- return builtin_type_float;
+ return builtin_type_ieee_single_big;
}
/* Return the GDB type object for the "standard" data type of data
in register N. hppa64 version. */
-struct type *
-hppa64_register_virtual_type (int reg_nr)
+static struct type *
+hppa64_register_type (struct gdbarch *gdbarch, int reg_nr)
{
- if (reg_nr < FP4_REGNUM)
- return builtin_type_unsigned_long_long;
+ if (reg_nr < HPPA_FP4_REGNUM)
+ return builtin_type_uint64;
else
- return builtin_type_double;
-}
-
-/* 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. */
- /* FIXME: cagney/2003-09-27: This function can probably go. ELZ
- writes: We cannot assume on the pa that r28 still contains the
- address of the returned structure. Usually this will be
- overwritten by the callee. */
- return (*(int *)(regbuf + DEPRECATED_REGISTER_BYTE (28)));
+ return builtin_type_ieee_double_big;
}
/* Return True if REGNUM is not a register available to the user
through ptrace(). */
-int
+static 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));
+ || regnum == HPPA_PCSQ_HEAD_REGNUM
+ || (regnum >= HPPA_PCSQ_TAIL_REGNUM && regnum < HPPA_IPSW_REGNUM)
+ || (regnum > HPPA_IPSW_REGNUM && regnum < HPPA_FP4_REGNUM));
}
-CORE_ADDR
+static CORE_ADDR
hppa_smash_text_address (CORE_ADDR addr)
{
/* The low two bits of the PC on the PA contain the privilege level.
struct type *type)
{
CORE_ADDR addr;
- get_frame_register (frame, R0_REGNUM + 26 - argi, &addr);
+ get_frame_register (frame, HPPA_R0_REGNUM + 26 - argi, &addr);
return addr;
}
+static void
+hppa_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, void *buf)
+{
+ ULONGEST tmp;
+
+ regcache_raw_read_unsigned (regcache, regnum, &tmp);
+ if (regnum == HPPA_PCOQ_HEAD_REGNUM || regnum == HPPA_PCOQ_TAIL_REGNUM)
+ tmp &= ~0x3;
+ store_unsigned_integer (buf, sizeof(tmp), tmp);
+}
+
+static CORE_ADDR
+hppa_find_global_pointer (struct value *function)
+{
+ return 0;
+}
+
+void
+hppa_frame_prev_register_helper (struct frame_info *next_frame,
+ struct trad_frame_saved_reg saved_regs[],
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, void *valuep)
+{
+ if (regnum == HPPA_PCOQ_TAIL_REGNUM)
+ {
+ if (valuep)
+ {
+ CORE_ADDR pc;
+
+ trad_frame_get_prev_register (next_frame, saved_regs,
+ HPPA_PCOQ_HEAD_REGNUM, optimizedp,
+ lvalp, addrp, realnump, valuep);
+
+ pc = extract_unsigned_integer (valuep, 4);
+ store_unsigned_integer (valuep, 4, pc + 4);
+ }
+
+ /* It's a computed value. */
+ *optimizedp = 0;
+ *lvalp = not_lval;
+ *addrp = 0;
+ *realnump = -1;
+ return;
+ }
+
+ trad_frame_get_prev_register (next_frame, saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
+}
+\f
+
/* Here is a table of C type sizes on hppa with various compiles
and options. I measured this on PA 9000/800 with HP-UX 11.11
and these compilers:
return (arches->gdbarch);
/* If none found, then allocate and initialize one. */
- tdep = XMALLOC (struct gdbarch_tdep);
+ tdep = XZALLOC (struct gdbarch_tdep);
gdbarch = gdbarch_alloc (&info, tdep);
/* Determine from the bfd_arch_info structure if we are dealing with
else
tdep->bytes_per_address = 4;
+ tdep->find_global_pointer = hppa_find_global_pointer;
+
/* Some parts of the gdbarch vector depend on whether we are running
on a 32 bits or 64 bits target. */
switch (tdep->bytes_per_address)
case 4:
set_gdbarch_num_regs (gdbarch, hppa32_num_regs);
set_gdbarch_register_name (gdbarch, hppa32_register_name);
- set_gdbarch_deprecated_register_virtual_type
- (gdbarch, hppa32_register_virtual_type);
- set_gdbarch_deprecated_call_dummy_length
- (gdbarch, hppa32_call_dummy_length);
- set_gdbarch_deprecated_stack_align (gdbarch, hppa32_stack_align);
- set_gdbarch_deprecated_reg_struct_has_addr
- (gdbarch, hppa_reg_struct_has_addr);
- set_gdbarch_deprecated_extract_return_value
- (gdbarch, hppa32_extract_return_value);
- set_gdbarch_use_struct_convention
- (gdbarch, hppa32_use_struct_convention);
- set_gdbarch_deprecated_store_return_value
- (gdbarch, hppa32_store_return_value);
+ set_gdbarch_register_type (gdbarch, hppa32_register_type);
break;
case 8:
set_gdbarch_num_regs (gdbarch, hppa64_num_regs);
set_gdbarch_register_name (gdbarch, hppa64_register_name);
- set_gdbarch_deprecated_register_virtual_type
- (gdbarch, hppa64_register_virtual_type);
- set_gdbarch_deprecated_call_dummy_breakpoint_offset
- (gdbarch, hppa64_call_dummy_breakpoint_offset);
- set_gdbarch_deprecated_call_dummy_length
- (gdbarch, hppa64_call_dummy_length);
- set_gdbarch_deprecated_stack_align (gdbarch, hppa64_stack_align);
- set_gdbarch_deprecated_extract_return_value
- (gdbarch, hppa64_extract_return_value);
- set_gdbarch_use_struct_convention
- (gdbarch, hppa64_use_struct_convention);
- set_gdbarch_deprecated_store_return_value
- (gdbarch, hppa64_store_return_value);
+ set_gdbarch_register_type (gdbarch, hppa64_register_type);
break;
default:
internal_error (__FILE__, __LINE__, "Unsupported address size: %d",
tdep->bytes_per_address);
}
- /* The following gdbarch vector elements depend on other parts of this
- vector which have been set above, depending on the ABI. */
- set_gdbarch_deprecated_register_bytes
- (gdbarch, gdbarch_num_regs (gdbarch) * tdep->bytes_per_address);
set_gdbarch_long_bit (gdbarch, tdep->bytes_per_address * TARGET_CHAR_BIT);
set_gdbarch_ptr_bit (gdbarch, tdep->bytes_per_address * TARGET_CHAR_BIT);
/* The following gdbarch vector elements do not depend on the address
size, or in any other gdbarch element previously set. */
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_deprecated_saved_pc_after_call (gdbarch, hppa_saved_pc_after_call);
- set_gdbarch_inner_than (gdbarch, hppa_inner_than);
- set_gdbarch_deprecated_register_size (gdbarch, tdep->bytes_per_address);
- set_gdbarch_deprecated_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_deprecated_npc_regnum (gdbarch, PCOQ_TAIL_REGNUM);
- set_gdbarch_deprecated_register_raw_size (gdbarch, hppa_register_raw_size);
- set_gdbarch_deprecated_register_byte (gdbarch, hppa_register_byte);
- set_gdbarch_deprecated_register_virtual_size (gdbarch, hppa_register_raw_size);
- set_gdbarch_deprecated_max_register_raw_size (gdbarch, tdep->bytes_per_address);
- set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 8);
- set_gdbarch_deprecated_store_struct_return (gdbarch, hppa_store_struct_return);
- set_gdbarch_deprecated_extract_struct_value_address
- (gdbarch, hppa_extract_struct_value_address);
+ set_gdbarch_inner_than (gdbarch, core_addr_greaterthan);
+ set_gdbarch_sp_regnum (gdbarch, HPPA_SP_REGNUM);
+ set_gdbarch_fp0_regnum (gdbarch, HPPA_FP0_REGNUM);
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_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_deprecated_fix_call_dummy (gdbarch, hppa_fix_call_dummy); */
- set_gdbarch_deprecated_push_arguments (gdbarch, hppa_push_arguments);
+ set_gdbarch_cannot_fetch_register (gdbarch, hppa_cannot_store_register);
set_gdbarch_addr_bits_remove (gdbarch, hppa_smash_text_address);
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_deprecated_target_read_fp (gdbarch, hppa_target_read_fp);
/* Helper for function argument information. */
set_gdbarch_fetch_pointer_argument (gdbarch, hppa_fetch_pointer_argument);
whether any watched location changed. */
set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
+ /* Inferior function call methods. */
+ switch (tdep->bytes_per_address)
+ {
+ case 4:
+ set_gdbarch_push_dummy_call (gdbarch, hppa32_push_dummy_call);
+ set_gdbarch_frame_align (gdbarch, hppa32_frame_align);
+ set_gdbarch_convert_from_func_ptr_addr
+ (gdbarch, hppa32_convert_from_func_ptr_addr);
+ break;
+ case 8:
+ set_gdbarch_push_dummy_call (gdbarch, hppa64_push_dummy_call);
+ set_gdbarch_frame_align (gdbarch, hppa64_frame_align);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, "bad switch");
+ }
+
+ /* Struct return methods. */
+ switch (tdep->bytes_per_address)
+ {
+ case 4:
+ set_gdbarch_return_value (gdbarch, hppa32_return_value);
+ break;
+ case 8:
+ set_gdbarch_return_value (gdbarch, hppa64_return_value);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, "bad switch");
+ }
+
+ set_gdbarch_breakpoint_from_pc (gdbarch, hppa_breakpoint_from_pc);
+ set_gdbarch_pseudo_register_read (gdbarch, hppa_pseudo_register_read);
+
+ /* Frame unwind methods. */
+ set_gdbarch_unwind_dummy_id (gdbarch, hppa_unwind_dummy_id);
+ set_gdbarch_unwind_pc (gdbarch, hppa_unwind_pc);
+
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);
+ /* Hook in the default unwinders. */
+ frame_unwind_append_sniffer (gdbarch, hppa_stub_unwind_sniffer);
+ frame_unwind_append_sniffer (gdbarch, hppa_frame_unwind_sniffer);
+ frame_unwind_append_sniffer (gdbarch, hppa_fallback_unwind_sniffer);
+
return gdbarch;
}
static void
hppa_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
{
- /* Nothing to print for the moment. */
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+ fprintf_unfiltered (file, "bytes_per_address = %d\n",
+ tdep->bytes_per_address);
+ fprintf_unfiltered (file, "elf = %s\n", tdep->is_elf ? "yes" : "no");
}
void
gdbarch_register (bfd_arch_hppa, hppa_gdbarch_init, hppa_dump_tdep);
+ hppa_objfile_priv_data = register_objfile_data ();
+
add_cmd ("unwind", class_maintenance, unwind_command,
"Print unwind table entry at given address.",
&maintenanceprintlist);
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);
-}
+ /* Debug this files internals. */
+ deprecated_add_show_from_set
+ (add_set_cmd ("hppa", class_maintenance, var_zinteger,
+ &hppa_debug, "Set hppa debugging.\n\
+When non-zero, hppa specific debugging is enabled.", &setdebuglist),
+ &showdebuglist);
+}
projects / deliverable / binutils-gdb.git / blobdiff