#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 "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_get_saved_register_ftype vax_get_saved_register;
+
+static gdbarch_store_struct_return_ftype vax_store_struct_return;
+static gdbarch_extract_return_value_ftype vax_extract_return_value;
+static gdbarch_store_return_value_ftype vax_store_return_value;
+static gdbarch_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 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_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;
frame->saved_regs[PS_REGNUM] = frame->frame + 4;
}
-CORE_ADDR
+static CORE_ADDR
vax_frame_saved_pc (struct frame_info *frame)
{
if (frame->signal_handler_caller)
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
return (read_register (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));
}
+
+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 (frame->pc))
+ return (0);
+
+ return (read_memory_integer (frame->frame + 12, 4));
+}
+\f
+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 (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));
+}
+
+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 (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);
+}
+
+static void
+vax_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
+{
+ memcpy (valbuf, regbuf + REGISTER_BYTE (0), TYPE_LENGTH (valtype));
+}
+
+static void
+vax_store_return_value (struct type *valtype, char *valbuf)
+{
+ write_register_bytes (0, valbuf, TYPE_LENGTH (valtype));
+}
+
+static CORE_ADDR
+vax_extract_struct_value_address (char *regbuf)
+{
+ return (extract_address (regbuf + REGISTER_BYTE (0), REGISTER_RAW_SIZE (0)));
+}
\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 (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;
+
+ /* Right now there is only one VAX architecture variant. */
+ if (arches != NULL)
+ return (arches->gdbarch);
+
+ gdbarch = gdbarch_alloc (&info, NULL);
+
+ /* 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_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_extract_return_value (gdbarch, vax_extract_return_value);
+ set_gdbarch_store_return_value (gdbarch, vax_store_return_value);
+ set_gdbarch_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_use_generic_dummy_frames (gdbarch, 0);
+ set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_on_stack);
+ set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
+
+ /* Breakpoint info */
+ set_gdbarch_decr_pc_after_break (gdbarch, 0);
+
+ /* Misc info */
+ set_gdbarch_function_start_offset (gdbarch, 2);
+
+ 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