#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 "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_frame_chain_ftype vax_frame_chain;
+static gdbarch_frame_saved_pc_ftype vax_frame_saved_pc;
+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_store_struct_return_ftype vax_store_struct_return;
+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_push_dummy_frame_ftype vax_push_dummy_frame;
+static gdbarch_pop_frame_ftype vax_pop_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;
/* 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;
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[VAX_AP_REGNUM] = frame->frame + 8;
frame->saved_regs[PS_REGNUM] = frame->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 (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));
}
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
if (frame->next)
return (read_memory_integer (frame->next->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);
}
-int
+static int
vax_frame_num_args (struct frame_info *fi)
{
return (0xff & read_memory_integer (FRAME_ARGS_ADDRESS (fi), 1));
}
-CORE_ADDR
+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,
return (read_memory_integer (frame->frame + 12, 4));
}
\f
-void
+static void
vax_push_dummy_frame (void)
{
CORE_ADDR sp = read_register (SP_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 (AP_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 (AP_REGNUM, sp + (17 * 4));
+ write_register (VAX_AP_REGNUM, sp + (17 * 4));
}
-void
+static void
vax_pop_frame (void)
{
CORE_ADDR fp = read_register (FP_REGNUM);
| (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 (AP_REGNUM, read_memory_integer (fp + 8, 4));
+ write_register (VAX_AP_REGNUM, read_memory_integer (fp + 8, 4));
fp += 16;
for (regnum = 0; regnum < 12; regnum++)
if (regmask & (0x10000 << regnum))
It is 8 bytes long. The address and argc are patched by
vax_fix_call_dummy(). */
-LONGEST vax_call_dummy_words[] = { 0x329f69fb, 0x03323232 };
-int sizeof_vax_call_dummy_words = sizeof(vax_call_dummy_words);
+static LONGEST vax_call_dummy_words[] = { 0x329f69fb, 0x03323232 };
+static int sizeof_vax_call_dummy_words = sizeof(vax_call_dummy_words);
-void
+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)
{
store_unsigned_integer (dummy + 3, 4, fun);
}
\f
-void
+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;
}
-CORE_ADDR
+static CORE_ADDR
vax_saved_pc_after_call (struct frame_info *frame)
{
return (FRAME_SAVED_PC(frame));
}
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_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;
+ }
+
+ tdep = xmalloc (sizeof (struct gdbarch_tdep));
+ gdbarch = gdbarch_alloc (&info, tdep);
+
+ /* 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);
+
+ tdep->osabi = osabi;
+
+ /* 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_max_register_raw_size (gdbarch, VAX_MAX_REGISTER_RAW_SIZE);
+ set_gdbarch_register_virtual_size (gdbarch, vax_register_virtual_size);
+ set_gdbarch_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_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_frame_locals_address (gdbarch, vax_frame_locals_address);
+
+ set_gdbarch_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_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_push_dummy_frame (gdbarch, vax_push_dummy_frame);
+ set_gdbarch_pop_frame (gdbarch, vax_pop_frame);
+ set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
+ set_gdbarch_call_dummy_p (gdbarch, 1);
+ 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_start_offset (gdbarch, 0);
+ set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
+ 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);
+ set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
+
+ /* 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);
+
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch, osabi);
+
+ 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);
+
tm_print_insn = vax_print_insn;
}
projects / deliverable / binutils-gdb.git / blobdiff