/* 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 "symtab.h"
#include "opcode/vax.h"
#include "gdbcore.h"
+#include "inferior.h"
+#include "regcache.h"
#include "frame.h"
#include "value.h"
+#include "arch-utils.h"
+#include "gdb_string.h"
+#include "osabi.h"
+
+#include "vax-tdep.h"
+
+static gdbarch_register_name_ftype vax_register_name;
+static gdbarch_register_byte_ftype vax_register_byte;
+static gdbarch_register_raw_size_ftype vax_register_raw_size;
+static gdbarch_register_virtual_size_ftype vax_register_virtual_size;
+static gdbarch_register_virtual_type_ftype vax_register_virtual_type;
+
+static gdbarch_skip_prologue_ftype vax_skip_prologue;
+static gdbarch_saved_pc_after_call_ftype vax_saved_pc_after_call;
+static gdbarch_frame_num_args_ftype vax_frame_num_args;
+static gdbarch_deprecated_frame_chain_ftype vax_frame_chain;
+static gdbarch_frame_args_address_ftype vax_frame_args_address;
+static gdbarch_frame_locals_address_ftype vax_frame_locals_address;
+
+static gdbarch_deprecated_extract_return_value_ftype vax_extract_return_value;
+static gdbarch_deprecated_extract_struct_value_address_ftype
+ vax_extract_struct_value_address;
+
+static gdbarch_deprecated_push_dummy_frame_ftype vax_push_dummy_frame;
+static gdbarch_fix_call_dummy_ftype vax_fix_call_dummy;
/* Return 1 if P points to an invalid floating point value.
LEN is the length in bytes -- not relevant on the Vax. */
static unsigned char *print_insn_arg ();
\f
-char *
+static const char *
vax_register_name (int regno)
{
static char *register_names[] =
return (register_names[regno]);
}
-int
+static int
vax_register_byte (int regno)
{
return (regno * 4);
}
-int
+static int
vax_register_raw_size (int regno)
{
return (4);
}
-int
+static int
vax_register_virtual_size (int regno)
{
return (4);
}
-struct type *
+static struct type *
vax_register_virtual_type (int regno)
{
return (builtin_type_int);
}
\f
-void
+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);
- 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 < AP_REGNUM; regnum++)
+ 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[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;
}
-CORE_ADDR
+/* 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);
}
-CORE_ADDR
+static CORE_ADDR
vax_frame_args_address (struct frame_info *frame)
{
/* 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 (AP_REGNUM));
+ return (read_register (VAX_AP_REGNUM));
}
-CORE_ADDR
+static CORE_ADDR
vax_frame_locals_address (struct frame_info *frame)
{
- return (frame->frame);
+ return (get_frame_base (frame));
}
-int
+static int
vax_frame_num_args (struct frame_info *fi)
{
return (0xff & read_memory_integer (FRAME_ARGS_ADDRESS (fi), 1));
}
+
+static CORE_ADDR
+vax_frame_chain (struct frame_info *frame)
+{
+ /* 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 (get_frame_pc (frame)))
+ return (0);
+
+ return (read_memory_integer (get_frame_base (frame) + 12, 4));
+}
\f
-void
+static void
+vax_push_dummy_frame (void)
+{
+ CORE_ADDR sp = read_register (SP_REGNUM);
+ int regnum;
+
+ sp = push_word (sp, 0); /* arglist */
+ for (regnum = 11; regnum >= 0; regnum--)
+ sp = push_word (sp, read_register (regnum));
+ sp = push_word (sp, read_register (PC_REGNUM));
+ sp = push_word (sp, read_register (FP_REGNUM));
+ sp = push_word (sp, read_register (VAX_AP_REGNUM));
+ sp = push_word (sp, (read_register (PS_REGNUM) & 0xffef) + 0x2fff0000);
+ sp = push_word (sp, 0);
+ write_register (SP_REGNUM, sp);
+ write_register (FP_REGNUM, sp);
+ write_register (VAX_AP_REGNUM, sp + (17 * 4));
+}
+
+static void
+vax_pop_frame (void)
+{
+ CORE_ADDR fp = read_register (FP_REGNUM);
+ int regnum;
+ int regmask = read_memory_integer (fp + 4, 4);
+
+ write_register (PS_REGNUM,
+ (regmask & 0xffff)
+ | (read_register (PS_REGNUM) & 0xffff0000));
+ write_register (PC_REGNUM, read_memory_integer (fp + 16, 4));
+ write_register (FP_REGNUM, read_memory_integer (fp + 12, 4));
+ write_register (VAX_AP_REGNUM, read_memory_integer (fp + 8, 4));
+ fp += 16;
+ for (regnum = 0; regnum < 12; regnum++)
+ if (regmask & (0x10000 << regnum))
+ write_register (regnum, read_memory_integer (fp += 4, 4));
+ fp = fp + 4 + ((regmask >> 30) & 3);
+ if (regmask & 0x20000000)
+ {
+ regnum = read_memory_integer (fp, 4);
+ fp += (regnum + 1) * 4;
+ }
+ write_register (SP_REGNUM, fp);
+ flush_cached_frames ();
+}
+
+/* The VAX call dummy sequence:
+
+ calls #69, @#32323232
+ bpt
+
+ It is 8 bytes long. The address and argc are patched by
+ vax_fix_call_dummy(). */
+static LONGEST vax_call_dummy_words[] = { 0x329f69fb, 0x03323232 };
+static int sizeof_vax_call_dummy_words = sizeof(vax_call_dummy_words);
+
+static void
+vax_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
+ struct value **args, struct type *type, int gcc_p)
+{
+ dummy[1] = nargs;
+ store_unsigned_integer (dummy + 3, 4, fun);
+}
+\f
+static void
vax_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
{
write_register (1, addr);
}
-void
+static void
vax_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
{
memcpy (valbuf, regbuf + REGISTER_BYTE (0), TYPE_LENGTH (valtype));
}
-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));
}
-CORE_ADDR
+static CORE_ADDR
vax_extract_struct_value_address (char *regbuf)
{
return (extract_address (regbuf + REGISTER_BYTE (0), REGISTER_RAW_SIZE (0)));
}
\f
+static const unsigned char *
+vax_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
+{
+ static const unsigned char vax_breakpoint[] = { 3 };
+
+ *lenptr = sizeof(vax_breakpoint);
+ return (vax_breakpoint);
+}
+\f
/* Advance PC across any function entry prologue instructions
to reach some "real" code. */
-CORE_ADDR
+static CORE_ADDR
vax_skip_prologue (CORE_ADDR pc)
{
register int op = (unsigned char) read_memory_integer (pc, 1);
return pc;
}
-
+static CORE_ADDR
+vax_saved_pc_after_call (struct frame_info *frame)
+{
+ return (DEPRECATED_FRAME_SAVED_PC(frame));
+}
+\f
/* Print the vax instruction at address MEMADDR in debugged memory,
from disassembler info INFO.
Returns length of the instruction, in bytes. */
}
return p - buffer;
}
-
+\f
static unsigned char *
print_insn_arg (char *d, register char *p, CORE_ADDR addr,
disassemble_info *info)
return (unsigned char *) p;
}
+\f
+/* Initialize the current architecture based on INFO. If possible, re-use an
+ architecture from ARCHES, which is a list of architectures already created
+ during this debugging session.
+
+ Called e.g. at program startup, when reading a core file, and when reading
+ a binary file. */
+
+static struct gdbarch *
+vax_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+{
+ struct gdbarch *gdbarch;
+
+ /* If there is already a candidate, use it. */
+ arches = gdbarch_list_lookup_by_info (arches, &info);
+ if (arches != NULL)
+ return arches->gdbarch;
+
+ gdbarch = gdbarch_alloc (&info, NULL);
+
+ /* 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_sp_regnum (gdbarch, VAX_SP_REGNUM);
+ set_gdbarch_fp_regnum (gdbarch, VAX_FP_REGNUM);
+ set_gdbarch_pc_regnum (gdbarch, VAX_PC_REGNUM);
+ set_gdbarch_ps_regnum (gdbarch, VAX_PS_REGNUM);
+
+ set_gdbarch_register_name (gdbarch, vax_register_name);
+ set_gdbarch_register_size (gdbarch, VAX_REGISTER_SIZE);
+ set_gdbarch_register_bytes (gdbarch, VAX_REGISTER_BYTES);
+ set_gdbarch_register_byte (gdbarch, vax_register_byte);
+ set_gdbarch_register_raw_size (gdbarch, vax_register_raw_size);
+ set_gdbarch_deprecated_max_register_raw_size (gdbarch, VAX_MAX_REGISTER_RAW_SIZE);
+ set_gdbarch_register_virtual_size (gdbarch, vax_register_virtual_size);
+ set_gdbarch_deprecated_max_register_virtual_size (gdbarch,
+ VAX_MAX_REGISTER_VIRTUAL_SIZE);
+ set_gdbarch_register_virtual_type (gdbarch, vax_register_virtual_type);
+
+ /* Frame and stack info */
+ set_gdbarch_skip_prologue (gdbarch, vax_skip_prologue);
+ set_gdbarch_saved_pc_after_call (gdbarch, vax_saved_pc_after_call);
+
+ set_gdbarch_frame_num_args (gdbarch, vax_frame_num_args);
+ set_gdbarch_frameless_function_invocation (gdbarch,
+ generic_frameless_function_invocation_not);
+
+ set_gdbarch_deprecated_frame_chain (gdbarch, vax_frame_chain);
+ set_gdbarch_deprecated_frame_saved_pc (gdbarch, vax_frame_saved_pc);
+
+ set_gdbarch_frame_args_address (gdbarch, vax_frame_args_address);
+ set_gdbarch_frame_locals_address (gdbarch, vax_frame_locals_address);
+
+ set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, vax_frame_init_saved_regs);
+
+ set_gdbarch_frame_args_skip (gdbarch, 4);
+
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+
+ /* Return value info */
+ set_gdbarch_deprecated_store_struct_return (gdbarch, vax_store_struct_return);
+ set_gdbarch_deprecated_extract_return_value (gdbarch, vax_extract_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_deprecated_push_dummy_frame (gdbarch, vax_push_dummy_frame);
+ set_gdbarch_deprecated_pop_frame (gdbarch, vax_pop_frame);
+ set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
+ set_gdbarch_call_dummy_words (gdbarch, vax_call_dummy_words);
+ set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof_vax_call_dummy_words);
+ set_gdbarch_fix_call_dummy (gdbarch, vax_fix_call_dummy);
+ set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 7);
+ set_gdbarch_deprecated_use_generic_dummy_frames (gdbarch, 0);
+ set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_on_stack);
+
+ /* Breakpoint info */
+ set_gdbarch_breakpoint_from_pc (gdbarch, vax_breakpoint_from_pc);
+ set_gdbarch_decr_pc_after_break (gdbarch, 0);
+
+ /* Misc info */
+ set_gdbarch_function_start_offset (gdbarch, 2);
+ set_gdbarch_believe_pcc_promotion (gdbarch, 1);
+
+ /* Should be using push_dummy_call. */
+ set_gdbarch_deprecated_dummy_write_sp (gdbarch, generic_target_write_sp);
+
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch);
+
+ return (gdbarch);
+}
void
_initialize_vax_tdep (void)
{
+ gdbarch_register (bfd_arch_vax, vax_gdbarch_init, NULL);
+
tm_print_insn = vax_print_insn;
}
projects / deliverable / binutils-gdb.git / blobdiff