/* 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"
int regnum, regmask;
CORE_ADDR next_addr;
- if (frame->saved_regs)
+ if (get_frame_saved_regs (frame))
return;
frame_saved_regs_zalloc (frame);
- regmask = read_memory_integer (frame->frame + 4, 4) >> 16;
+ regmask = read_memory_integer (get_frame_base (frame) + 4, 4) >> 16;
- next_addr = frame->frame + 16;
+ next_addr = get_frame_base (frame) + 16;
/* regmask's low bit is for register 0, which is the first one
what would be pushed. */
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] = get_frame_base (frame) + 16;
+ get_frame_saved_regs (frame)[FP_REGNUM] = get_frame_base (frame) + 12;
+ get_frame_saved_regs (frame)[VAX_AP_REGNUM] = get_frame_base (frame) + 8;
+ get_frame_saved_regs (frame)[PS_REGNUM] = get_frame_base (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 (get_next_frame (frame))
+ sigcontext_addr = read_memory_typed_address
+ (FRAME_ARGS_ADDRESS (get_next_frame (frame))
+ + 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));
+ return (read_memory_integer (get_frame_base (frame) + 16, 4));
}
CORE_ADDR
(which is one reason that "info frame" exists). So, return 0 (indicating
we don't know the address of the arglist) if we don't know what frame
this frame calls. */
- if (frame->next)
- return (read_memory_integer (frame->next->frame + 8, 4));
+ if (get_next_frame (frame))
+ return (read_memory_integer (get_frame_base (get_next_frame (frame)) + 8, 4));
return (0);
}
/* In most of GDB, getting the args address is too important to
just say "I don't know". This is sometimes wrong for functions
that aren't on top of the stack, but c'est la vie. */
- if (frame->next)
- return (read_memory_integer (frame->next->frame + 8, 4));
+ if (get_next_frame (frame))
+ return (read_memory_integer (get_frame_base (get_next_frame (frame)) + 8, 4));
return (read_register (VAX_AP_REGNUM));
}
static CORE_ADDR
vax_frame_locals_address (struct frame_info *frame)
{
- return (frame->frame);
+ return (get_frame_base (frame));
}
static int
{
/* 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));
+ return (read_memory_integer (get_frame_base (frame) + 12, 4));
}
\f
static void
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);
generic_frameless_function_invocation_not);
set_gdbarch_frame_chain (gdbarch, vax_frame_chain);
- set_gdbarch_frame_chain_valid (gdbarch, func_frame_chain_valid);
set_gdbarch_frame_saved_pc (gdbarch, vax_frame_saved_pc);
set_gdbarch_frame_args_address (gdbarch, vax_frame_args_address);
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