#include "frame-unwind.h"
#include "frame-base.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 "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;
+/* 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_11 0x7ff
/* 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)
+#define SR4EXPORT_LDIL_OFFSET (HPPA_INSTRUCTION_SIZE * 12)
+#define SR4EXPORT_LDO_OFFSET (HPPA_INSTRUCTION_SIZE * 13)
/* To support detection of the pseudo-initial frame
that threads have. */
#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);
-
-struct unwind_table_entry *find_unwind_entry (CORE_ADDR);
-
-static int extract_17 (unsigned int);
-
-static int extract_21 (unsigned);
-
-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 hppa_alignof (struct type *);
static int prologue_inst_adjust_sp (unsigned long);
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);
-int hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs);
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);
-int hppa_cannot_store_register (int regnum);
-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;
-
-/* In breakpoint.c */
-extern int exception_catchpoints_are_fragile;
/* Handle 32/64-bit struct return conventions. */
/* 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)
+int
+hppa_extract_14 (unsigned word)
{
- return low_sign_extend (word & MASK_14, 14);
+ 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 |= hppa_get_field (word, 0, 4);
val <<= 2;
- val |= get_field (word, 7, 8);
- return sign_extend (val, 21) << 11;
+ 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;
}
\f
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->objfile_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;
compare_unwind_entries);
/* Keep a pointer to the unwind information. */
- if (objfile->obj_private == NULL)
- {
- obj_private = (obj_private_data_t *)
- obstack_alloc (&objfile->objfile_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 unsigned char breakpoint[] = {0x00, 0x01, 0x00, 0x04};
return names[i];
}
-
-
-/* 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;
-}
-
/* This function pushes a stack frame with arguments as part of the
inferior function calling mechanism.
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, 8),
- REG_PARM_STACK_SPACE);
+ param_end = struct_end + max (align_up (param_ptr, 8), 16);
}
}
/* Set the return address. */
regcache_cooked_write_unsigned (regcache, RP_REGNUM, bp_addr);
+ /* Update the Stack Pointer. */
+ regcache_cooked_write_unsigned (regcache, SP_REGNUM, param_end + 32);
+
/* The stack will have 32 bytes of additional space for a frame marker. */
return param_end + 32;
}
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),
- REG_PARM_STACK_SPACE);
+ param_end = struct_end + max (align_up (param_ptr, 16), 64);
}
}
/* Set the return address. */
regcache_cooked_write_unsigned (regcache, RP_REGNUM, bp_addr);
+ /* Update the Stack Pointer. */
+ regcache_cooked_write_unsigned (regcache, SP_REGNUM, param_end + 64);
+
/* The stack will have 32 bytes of additional space for a frame marker. */
return param_end + 64;
}
/* Force all frames to 16-byte alignment. Better safe than sorry. */
-static CORE_ADDR
-hppa64_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
-{
- /* Just always 16-byte align. */
- return align_up (addr, 16);
-}
-
-
-/* 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;
-}
-
-/* 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 (PCOQ_HEAD_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 (PCOQ_HEAD_REGNUM, v, ptid);
- write_register_pid (PCOQ_TAIL_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. */
-
-CORE_ADDR
-hppa_skip_trampoline_code (CORE_ADDR pc)
-{
- 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;
- }
- }
+static CORE_ADDR
+hppa64_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ /* Just always 16-byte align. */
+ return align_up (addr, 16);
+}
-/*--------------------------------------------------------------------------*/
- }
- /* 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. */
+/* Get the PC from %r31 if currently in a syscall. Also mask out privilege
+ bits. */
- loc = pc;
- curr_inst = 0;
- prev_inst = 0;
- while (1)
- {
- /* 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;
- }
+static CORE_ADDR
+hppa_target_read_pc (ptid_t ptid)
+{
+ int flags = read_register_pid (FLAGS_REGNUM, ptid);
- prev_inst = curr_inst;
- curr_inst = read_memory_integer (loc, 4);
+ /* 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;
- /* 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;
- }
- }
+ return read_register_pid (PCOQ_HEAD_REGNUM, ptid) & ~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;
+/* Write out the PC. If currently in a syscall, then also write the new
+ PC value into %r31. */
- 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;
- }
+static void
+hppa_target_write_pc (CORE_ADDR v, ptid_t ptid)
+{
+ int flags = read_register_pid (FLAGS_REGNUM, ptid);
- 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;
- }
+ /* 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);
- return SYMBOL_VALUE (libsym);
- }
+ write_register_pid (PCOQ_HEAD_REGNUM, v, ptid);
+ write_register_pid (PCOQ_TAIL_REGNUM, v + 4, ptid);
+}
+
+/* return the alignment of a type in bytes. Structures have the maximum
+ alignment required by their fields. */
- /* 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)
+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++)
{
- /* 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);
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;
struct unwind_table_entry *u;
int i;
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "{ hppa_frame_cache (frame=%d) -> ",
+ frame_relative_level(next_frame));
+
if ((*this_cache) != NULL)
- return (*this_cache);
+ {
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "base=0x%s (cached) }",
+ paddr_nz (((struct hppa_frame_cache *)*this_cache)->base));
+ return (*this_cache);
+ }
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 (frame_func_unwind (next_frame));
if (!u)
- return (*this_cache);
+ {
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "base=NULL (no unwind entry) }");
+ return (*this_cache);
+ }
/* Turn the Entry_GR field into a bitmask. */
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;
saved_gr_mask |= (1 << i);
{
int final_iteration = 0;
CORE_ADDR pc;
- CORE_ADDR end_pc = skip_prologue_using_sal (pc);
+ CORE_ADDR end_pc;
int looking_for_sp = u->Save_SP;
int looking_for_rp = u->Save_RP;
int fp_loc = -1;
+ end_pc = skip_prologue_using_sal (frame_func_unwind (next_frame));
if (end_pc == 0)
end_pc = frame_pc_unwind (next_frame);
frame_size = 0;
|| (inst & 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
{
looking_for_sp = 0;
- cache->saved_regs[DEPRECATED_FP_REGNUM].addr = 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 != DEPRECATED_FP_REGNUM))
+ && (!u->Save_SP || reg != HPPA_FP_REGNUM))
{
saved_gr_mask &= ~(1 << reg);
- if ((inst >> 26) == 0x1b && extract_14 (inst) >= 0)
+ if ((inst >> 26) == 0x1b && hppa_extract_14 (inst) >= 0)
/* stwm with a positive displacement is a _post_
_modify_. */
cache->saved_regs[reg].addr = 0;
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);
+ offset = hppa_low_hppa_sign_extend (inst & 0x1f, 5);
else
- offset = extract_14 (inst);
+ offset = hppa_extract_14 (inst);
/* Handle code with and without frame pointers. */
if (u->Save_SP)
/* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
if ((inst & 0xffffc000) == 0x34610000
|| (inst & 0xffffc000) == 0x37c10000)
- fp_loc = extract_14 (inst);
+ fp_loc = hppa_extract_14 (inst);
reg = inst_saves_fr (inst);
if (reg >= 12 && reg <= 21)
}
else
{
- cache->saved_regs[reg + FP0_REGNUM + 4].addr = fp_loc;
+ cache->saved_regs[reg + HPPA_FP0_REGNUM + 4].addr = fp_loc;
fp_loc += 8;
}
}
/* 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, SP_REGNUM);
+ CORE_ADDR this_sp = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM);
/* FIXME: cagney/2004-02-22: This assumes that the frame has been
created. If it hasn't everything will be out-of-wack. */
- if (u->Save_SP && trad_frame_addr_p (cache->saved_regs, SP_REGNUM))
+ 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. */
/* The prologue has been slowly allocating stack space. Adjust
the SP back. */
cache->base = this_sp - frame_size;
- trad_frame_set_value (cache->saved_regs, SP_REGNUM, cache->base);
+ trad_frame_set_value (cache->saved_regs, HPPA_SP_REGNUM, cache->base);
}
/* The PC is found in the "return register", "Millicode" uses "r31"
}
}
+ if (hppa_debug)
+ fprintf_unfiltered (gdb_stdlog, "base=0x%s }",
+ paddr_nz (((struct hppa_frame_cache *)*this_cache)->base));
return (*this_cache);
}
hppa_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
return frame_id_build (frame_unwind_register_unsigned (next_frame,
- SP_REGNUM),
+ HPPA_SP_REGNUM),
frame_pc_unwind (next_frame));
}
return frame_unwind_register_signed (next_frame, PCOQ_HEAD_REGNUM) & ~3;
}
-/* 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)
-{
- CORE_ADDR anaddr;
- struct minimal_symbol *msymbol;
- char buf[4]; /* FIXME 32x64? */
-
- /* Slam the pid of the process into __d_pid; failing is only a warning! */
- msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile);
- if (msymbol == NULL)
- {
- 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;
- }
-
- 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;
-}
-
-/* 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 0 => failure
- 1 => success */
-
-static int
-initialize_hp_cxx_exception_support (void)
-{
- 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;
-
- /* 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;
- }
-
- hp_cxx_exception_support = 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;
-
- /* 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)
- {
- eh_notify_hook_addr = SYMBOL_VALUE_ADDRESS (msym);
- hp_cxx_exception_support = 1;
- }
- else
- {
- warning ("Unable to find exception callback hook (%s).", HP_ACC_EH_notify_hook);
- 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;
- }
-
- /* 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)
- {
- eh_notify_callback_addr = SYMBOL_VALUE_ADDRESS (msym);
- hp_cxx_exception_support = 1;
- }
- 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;
- }
-
-#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. */
-
- args_for_find_stub args;
- static char message[] = "Error while finding exception callback hook:\n";
-
- args.solib_handle = som_solib_get_solib_by_pc (eh_notify_callback_addr);
- args.msym = msym;
- args.return_val = 0;
-
- recurse++;
- catch_errors (cover_find_stub_with_shl_get, &args, message,
- RETURN_MASK_ALL);
- eh_notify_callback_addr = args.return_val;
- recurse--;
-
- exception_catchpoints_are_fragile = 1;
-
- if (!eh_notify_callback_addr)
- {
- /* We can get here either if there is no plabel in the export list
- for the main image, or if something strange happened (?) */
- warning ("Couldn't find a plabel (indirect function label) for the exception callback.");
- warning ("GDB will not be able to intercept exception events.");
- return 0;
- }
- }
- else
- exception_catchpoints_are_fragile = 0;
-#endif
-
- /* Now, look for the breakpointable routine in end.o */
- /* This should also be available in the SOM symbol dict. if end.o linked in */
- 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;
- }
-
- /* 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;
- }
- }
-
- /* 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. */
- {
- 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
- {
- 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;
- }
- }
-
- /* Set the flags */
- hp_cxx_exception_support = 2; /* everything worked so far */
- hp_cxx_exception_support_initialized = 1;
- exception_support_initialized = 1;
-
- return 1;
-}
-
-/* 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)
-{
- char buf[4];
-
- if (!exception_support_initialized || !hp_cxx_exception_support_initialized)
- if (!initialize_hp_cxx_exception_support ())
- return NULL;
-
- 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 */
- }
-
- /* 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;
- }
- }
-
- 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.");
- }
-
- /* 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;
-
- return break_callback_sal;
-}
-
-/* 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)
-{
- 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;
-}
-
/* Instead of this nasty cast, add a method pvoid() that prints out a
host VOID data type (remember %p isn't portable). */
/* We can leave the tail's space the same, since there's no jump. */
}
-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);
-}
-
int
hppa_pc_requires_run_before_use (CORE_ADDR pc)
{
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;
+ 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;
+ return builtin_type_uint64;
else
- return builtin_type_double;
+ 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
}
-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.
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 == PCOQ_HEAD_REGNUM || regnum == PCOQ_TAIL_REGNUM)
+ tmp &= ~0x3;
+ store_unsigned_integer (buf, sizeof(tmp), tmp);
+}
+
/* 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
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_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_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_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_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_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_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);
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);
+
/* Frame unwind methods. */
set_gdbarch_unwind_dummy_id (gdbarch, hppa_unwind_dummy_id);
set_gdbarch_unwind_pc (gdbarch, hppa_unwind_pc);
frame_unwind_append_sniffer (gdbarch, hppa_frame_unwind_sniffer);
frame_base_append_sniffer (gdbarch, hppa_frame_base_sniffer);
+ set_gdbarch_pseudo_register_read (gdbarch, hppa_pseudo_register_read);
+
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, 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. */
+ 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