/* Print VAX instructions for GDB, the GNU debugger.
- Copyright 1986, 1989, 1991, 1992, 1995, 1996, 1998, 1999, 2000, 2002
+ Copyright 1986, 1989, 1991, 1992, 1995, 1996, 1998, 1999, 2000, 2002, 2003
Free Software Foundation, Inc.
This file is part of GDB.
#include "frame.h"
#include "value.h"
#include "arch-utils.h"
+#include "gdb_string.h"
+#include "osabi.h"
#include "vax-tdep.h"
static gdbarch_frame_args_address_ftype vax_frame_args_address;
static gdbarch_frame_locals_address_ftype vax_frame_locals_address;
static gdbarch_frame_init_saved_regs_ftype vax_frame_init_saved_regs;
-static gdbarch_get_saved_register_ftype vax_get_saved_register;
static gdbarch_store_struct_return_ftype vax_store_struct_return;
static gdbarch_deprecated_extract_return_value_ftype vax_extract_return_value;
-static gdbarch_store_return_value_ftype vax_store_return_value;
static gdbarch_deprecated_extract_struct_value_address_ftype
vax_extract_struct_value_address;
return (builtin_type_int);
}
\f
-static void
-vax_get_saved_register (char *raw_buffer, int *optimized, CORE_ADDR *addrp,
- struct frame_info *frame, int regnum,
- enum lval_type *lval)
-{
- CORE_ADDR addr;
-
- if (!target_has_registers)
- error ("No registers.");
-
- /* Normal systems don't optimize out things with register numbers. */
- if (optimized != NULL)
- *optimized = 0;
- addr = find_saved_register (frame, regnum);
- if (addr != 0)
- {
- if (lval != NULL)
- *lval = lval_memory;
- if (regnum == SP_REGNUM)
- {
- if (raw_buffer != NULL)
- {
- /* Put it back in target format. */
- store_address (raw_buffer, REGISTER_RAW_SIZE (regnum),
- (LONGEST) addr);
- }
- if (addrp != NULL)
- *addrp = 0;
- return;
- }
- if (raw_buffer != NULL)
- target_read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum));
- }
- else
- {
- if (lval != NULL)
- *lval = lval_register;
- addr = REGISTER_BYTE (regnum);
- if (raw_buffer != NULL)
- read_register_gen (regnum, raw_buffer);
- }
- if (addrp != NULL)
- *addrp = addr;
-}
-
static void
vax_frame_init_saved_regs (struct frame_info *frame)
{
int regnum, regmask;
CORE_ADDR next_addr;
- if (frame->saved_regs)
+ if (get_frame_saved_regs (frame))
return;
frame_saved_regs_zalloc (frame);
for (regnum = 0; regnum < VAX_AP_REGNUM; regnum++)
{
if (regmask & (1 << regnum))
- frame->saved_regs[regnum] = next_addr += 4;
+ get_frame_saved_regs (frame)[regnum] = next_addr += 4;
}
- frame->saved_regs[SP_REGNUM] = next_addr + 4;
+ get_frame_saved_regs (frame)[SP_REGNUM] = next_addr + 4;
if (regmask & (1 << FP_REGNUM))
- frame->saved_regs[SP_REGNUM] +=
+ get_frame_saved_regs (frame)[SP_REGNUM] +=
4 + (4 * read_memory_integer (next_addr + 4, 4));
- frame->saved_regs[PC_REGNUM] = frame->frame + 16;
- frame->saved_regs[FP_REGNUM] = frame->frame + 12;
- frame->saved_regs[VAX_AP_REGNUM] = frame->frame + 8;
- frame->saved_regs[PS_REGNUM] = frame->frame + 4;
+ get_frame_saved_regs (frame)[PC_REGNUM] = frame->frame + 16;
+ get_frame_saved_regs (frame)[FP_REGNUM] = frame->frame + 12;
+ get_frame_saved_regs (frame)[VAX_AP_REGNUM] = frame->frame + 8;
+ get_frame_saved_regs (frame)[PS_REGNUM] = frame->frame + 4;
+}
+
+/* Get saved user PC for sigtramp from sigcontext for BSD style sigtramp. */
+
+static CORE_ADDR
+vax_sigtramp_saved_pc (struct frame_info *frame)
+{
+ CORE_ADDR sigcontext_addr;
+ char *buf;
+ int ptrbytes = TYPE_LENGTH (builtin_type_void_func_ptr);
+ int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
+
+ buf = alloca (ptrbytes);
+ /* Get sigcontext address, it is the third parameter on the stack. */
+ if (frame->next)
+ sigcontext_addr = read_memory_typed_address
+ (FRAME_ARGS_ADDRESS (frame->next) + FRAME_ARGS_SKIP + sigcontext_offs,
+ builtin_type_void_data_ptr);
+ else
+ sigcontext_addr = read_memory_typed_address
+ (read_register (SP_REGNUM) + sigcontext_offs, builtin_type_void_data_ptr);
+
+ /* Don't cause a memory_error when accessing sigcontext in case the stack
+ layout has changed or the stack is corrupt. */
+ target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
+ return extract_typed_address (buf, builtin_type_void_func_ptr);
}
static CORE_ADDR
vax_frame_saved_pc (struct frame_info *frame)
{
- if (frame->signal_handler_caller)
- return (sigtramp_saved_pc (frame)); /* XXXJRT */
+ if ((get_frame_type (frame) == SIGTRAMP_FRAME))
+ return (vax_sigtramp_saved_pc (frame)); /* XXXJRT */
return (read_memory_integer (frame->frame + 16, 4));
}
{
/* In the case of the VAX, the frame's nominal address is the FP value,
and 12 bytes later comes the saved previous FP value as a 4-byte word. */
- if (inside_entry_file (frame->pc))
+ if (inside_entry_file (get_frame_pc (frame)))
return (0);
return (read_memory_integer (frame->frame + 12, 4));
static void
vax_store_return_value (struct type *valtype, char *valbuf)
{
- write_register_bytes (0, valbuf, TYPE_LENGTH (valtype));
+ deprecated_write_register_bytes (0, valbuf, TYPE_LENGTH (valtype));
}
static CORE_ADDR
static struct gdbarch *
vax_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
- struct gdbarch_tdep *tdep;
struct gdbarch *gdbarch;
- enum gdb_osabi osabi = GDB_OSABI_UNKNOWN;
- /* Try to determine the ABI of the object we are loading. */
-
- if (info.abfd != NULL)
- osabi = gdbarch_lookup_osabi (info.abfd);
-
- /* Find a candidate among extant architectures. */
- for (arches = gdbarch_list_lookup_by_info (arches, &info);
- arches != NULL;
- arches = gdbarch_list_lookup_by_info (arches->next, &info))
- {
- /* Make sure the ABI selection matches. */
- tdep = gdbarch_tdep (arches->gdbarch);
- if (tdep && tdep->osabi == osabi)
- return arches->gdbarch;
- }
+ /* If there is already a candidate, use it. */
+ arches = gdbarch_list_lookup_by_info (arches, &info);
+ if (arches != NULL)
+ return arches->gdbarch;
- tdep = xmalloc (sizeof (struct gdbarch_tdep));
- gdbarch = gdbarch_alloc (&info, tdep);
+ gdbarch = gdbarch_alloc (&info, NULL);
- tdep->osabi = osabi;
+ /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
+ ready to unwind the PC first (see frame.c:get_prev_frame()). */
+ set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
/* Register info */
set_gdbarch_num_regs (gdbarch, VAX_NUM_REGS);
set_gdbarch_frame_args_skip (gdbarch, 4);
- set_gdbarch_get_saved_register (gdbarch, vax_get_saved_register);
-
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
/* Return value info */
set_gdbarch_store_struct_return (gdbarch, vax_store_struct_return);
set_gdbarch_deprecated_extract_return_value (gdbarch, vax_extract_return_value);
- set_gdbarch_store_return_value (gdbarch, vax_store_return_value);
+ set_gdbarch_deprecated_store_return_value (gdbarch, vax_store_return_value);
set_gdbarch_deprecated_extract_struct_value_address (gdbarch, vax_extract_struct_value_address);
/* Call dummy info */
set_gdbarch_call_dummy_start_offset (gdbarch, 0);
set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 7);
- set_gdbarch_use_generic_dummy_frames (gdbarch, 0);
- set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_on_stack);
+ set_gdbarch_deprecated_use_generic_dummy_frames (gdbarch, 0);
+ set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_on_stack);
set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
/* Breakpoint info */
set_gdbarch_believe_pcc_promotion (gdbarch, 1);
/* Hook in ABI-specific overrides, if they have been registered. */
- gdbarch_init_osabi (info, gdbarch, osabi);
+ gdbarch_init_osabi (info, gdbarch);
return (gdbarch);
}
-static void
-vax_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
-
- if (tdep == NULL)
- return;
-
- fprintf_unfiltered (file, "vax_dump_tdep: OS ABI = %s\n",
- gdbarch_osabi_name (tdep->osabi));
-}
-
void
_initialize_vax_tdep (void)
{
- gdbarch_register (bfd_arch_vax, vax_gdbarch_init, vax_dump_tdep);
+ gdbarch_register (bfd_arch_vax, vax_gdbarch_init, NULL);
tm_print_insn = vax_print_insn;
}
projects / deliverable / binutils-gdb.git / blobdiff