-/* Print VAX instructions for GDB, the GNU debugger.
+/* Target-dependent code for the VAX.
- Copyright 1986, 1989, 1991, 1992, 1995, 1996, 1998, 1999, 2000,
- 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1989, 1991, 1992, 1995, 1996, 1998, 1999, 2000,
+ 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
-#include "symtab.h"
-#include "opcode/vax.h"
-#include "gdbcore.h"
-#include "inferior.h"
-#include "regcache.h"
+#include "arch-utils.h"
+#include "dis-asm.h"
+#include "floatformat.h"
#include "frame.h"
#include "frame-base.h"
#include "frame-unwind.h"
+#include "gdbcore.h"
+#include "gdbtypes.h"
+#include "osabi.h"
+#include "regcache.h"
+#include "regset.h"
#include "trad-frame.h"
#include "value.h"
-#include "arch-utils.h"
+
#include "gdb_string.h"
-#include "osabi.h"
-#include "dis-asm.h"
#include "vax-tdep.h"
return builtin_type_int;
}
\f
+/* Core file support. */
-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 (VAX_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 (VAX_FP_REGNUM, sp);
- write_register (VAX_AP_REGNUM, sp + (17 * 4));
-}
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+ in the general-purpose register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
static void
-vax_pop_frame (void)
+vax_supply_gregset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
{
- CORE_ADDR fp = read_register (VAX_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 (VAX_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)
+ const gdb_byte *regs = gregs;
+ int i;
+
+ for (i = 0; i < VAX_NUM_REGS; i++)
{
- regnum = read_memory_integer (fp, 4);
- fp += (regnum + 1) * 4;
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + i * 4);
}
- write_register (SP_REGNUM, fp);
- flush_cached_frames ();
}
-/* The VAX call dummy sequence:
+/* VAX register set. */
- calls #69, @#32323232
- bpt
+static struct regset vax_gregset =
+{
+ NULL,
+ vax_supply_gregset
+};
- 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);
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
-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)
+static const struct regset *
+vax_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
{
- dummy[1] = nargs;
- store_unsigned_integer (dummy + 3, 4, fun);
+ if (strcmp (sect_name, ".reg") == 0 && sect_size >= VAX_NUM_REGS * 4)
+ return &vax_gregset;
+
+ return NULL;
}
\f
-static void
-vax_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
+/* The VAX UNIX calling convention uses R1 to pass a structure return
+ value address instead of passing it as a first (hidden) argument as
+ the VMS calling convention suggests. */
+
+static CORE_ADDR
+vax_store_arguments (struct regcache *regcache, int nargs,
+ struct value **args, CORE_ADDR sp)
{
- write_register (1, addr);
+ gdb_byte buf[4];
+ int count = 0;
+ int i;
+
+ /* We create an argument list on the stack, and make the argument
+ pointer to it. */
+
+ /* Push arguments in reverse order. */
+ for (i = nargs - 1; i >= 0; i--)
+ {
+ int len = TYPE_LENGTH (value_enclosing_type (args[i]));
+
+ sp -= (len + 3) & ~3;
+ count += (len + 3) / 4;
+ write_memory (sp, value_contents_all (args[i]), len);
+ }
+
+ /* Push argument count. */
+ sp -= 4;
+ store_unsigned_integer (buf, 4, count);
+ write_memory (sp, buf, 4);
+
+ /* Update the argument pointer. */
+ store_unsigned_integer (buf, 4, sp);
+ regcache_cooked_write (regcache, VAX_AP_REGNUM, buf);
+
+ return sp;
}
-static void
-vax_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
+static CORE_ADDR
+vax_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
+ struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
+ struct value **args, CORE_ADDR sp, int struct_return,
+ CORE_ADDR struct_addr)
{
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (0), TYPE_LENGTH (valtype));
+ CORE_ADDR fp = sp;
+ gdb_byte buf[4];
+
+ /* Set up the function arguments. */
+ sp = vax_store_arguments (regcache, nargs, args, sp);
+
+ /* Store return value address. */
+ if (struct_return)
+ regcache_cooked_write_unsigned (regcache, VAX_R1_REGNUM, struct_addr);
+
+ /* Store return address in the PC slot. */
+ sp -= 4;
+ store_unsigned_integer (buf, 4, bp_addr);
+ write_memory (sp, buf, 4);
+
+ /* Store the (fake) frame pointer in the FP slot. */
+ sp -= 4;
+ store_unsigned_integer (buf, 4, fp);
+ write_memory (sp, buf, 4);
+
+ /* Skip the AP slot. */
+ sp -= 4;
+
+ /* Store register save mask and control bits. */
+ sp -= 4;
+ store_unsigned_integer (buf, 4, 0);
+ write_memory (sp, buf, 4);
+
+ /* Store condition handler. */
+ sp -= 4;
+ store_unsigned_integer (buf, 4, 0);
+ write_memory (sp, buf, 4);
+
+ /* Update the stack pointer and frame pointer. */
+ store_unsigned_integer (buf, 4, sp);
+ regcache_cooked_write (regcache, VAX_SP_REGNUM, buf);
+ regcache_cooked_write (regcache, VAX_FP_REGNUM, buf);
+
+ /* Return the saved (fake) frame pointer. */
+ return fp;
}
-static void
-vax_store_return_value (struct type *valtype, char *valbuf)
+static struct frame_id
+vax_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ CORE_ADDR fp;
+
+ fp = frame_unwind_register_unsigned (next_frame, VAX_FP_REGNUM);
+ return frame_id_build (fp, frame_pc_unwind (next_frame));
+}
+\f
+
+static enum return_value_convention
+vax_return_value (struct gdbarch *gdbarch, struct type *type,
+ struct regcache *regcache, gdb_byte *readbuf,
+ const gdb_byte *writebuf)
{
- deprecated_write_register_bytes (0, valbuf, TYPE_LENGTH (valtype));
+ int len = TYPE_LENGTH (type);
+ gdb_byte buf[8];
+
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type) == TYPE_CODE_UNION
+ || TYPE_CODE (type) == TYPE_CODE_ARRAY)
+ {
+ /* The default on VAX is to return structures in static memory.
+ Consequently a function must return the address where we can
+ find the return value. */
+
+ if (readbuf)
+ {
+ ULONGEST addr;
+
+ regcache_raw_read_unsigned (regcache, VAX_R0_REGNUM, &addr);
+ read_memory (addr, readbuf, len);
+ }
+
+ return RETURN_VALUE_ABI_RETURNS_ADDRESS;
+ }
+
+ if (readbuf)
+ {
+ /* Read the contents of R0 and (if necessary) R1. */
+ regcache_cooked_read (regcache, VAX_R0_REGNUM, buf);
+ if (len > 4)
+ regcache_cooked_read (regcache, VAX_R1_REGNUM, buf + 4);
+ memcpy (readbuf, buf, len);
+ }
+ if (writebuf)
+ {
+ /* Read the contents to R0 and (if necessary) R1. */
+ memcpy (buf, writebuf, len);
+ regcache_cooked_write (regcache, VAX_R0_REGNUM, buf);
+ if (len > 4)
+ regcache_cooked_write (regcache, VAX_R1_REGNUM, buf + 4);
+ }
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
\f
*LEN and optionally adjust *PC to point to the correct memory
location for inserting the breakpoint. */
-static const unsigned char *
+static const gdb_byte *
vax_breakpoint_from_pc (CORE_ADDR *pc, int *len)
{
- static unsigned char break_insn[] = { 3 };
+ static gdb_byte break_insn[] = { 3 };
*len = sizeof (break_insn);
return break_insn;
static CORE_ADDR
vax_skip_prologue (CORE_ADDR pc)
{
- int op = (unsigned char) read_memory_integer (pc, 1);
+ gdb_byte op = read_memory_unsigned_integer (pc, 1);
+
if (op == 0x11)
pc += 2; /* skip brb */
if (op == 0x31)
pc += 3; /* skip brw */
if (op == 0xC2
- && ((unsigned char) read_memory_integer (pc + 2, 1)) == 0x5E)
+ && (read_memory_unsigned_integer (pc + 2, 1)) == 0x5E)
pc += 3; /* skip subl2 */
if (op == 0x9E
- && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xAE
- && ((unsigned char) read_memory_integer (pc + 3, 1)) == 0x5E)
+ && (read_memory_unsigned_integer (pc + 1, 1)) == 0xAE
+ && (read_memory_unsigned_integer (pc + 3, 1)) == 0x5E)
pc += 4; /* skip movab */
if (op == 0x9E
- && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xCE
- && ((unsigned char) read_memory_integer (pc + 4, 1)) == 0x5E)
+ && (read_memory_unsigned_integer (pc + 1, 1)) == 0xCE
+ && (read_memory_unsigned_integer (pc + 4, 1)) == 0x5E)
pc += 5; /* skip movab */
if (op == 0x9E
- && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xEE
- && ((unsigned char) read_memory_integer (pc + 6, 1)) == 0x5E)
+ && (read_memory_unsigned_integer (pc + 1, 1)) == 0xEE
+ && (read_memory_unsigned_integer (pc + 6, 1)) == 0x5E)
pc += 7; /* skip movab */
+
return pc;
}
\f
ULONGEST numarg;
/* This is a procedure with Stack Argument List. Adjust the
- stack address for the arguments thet were pushed onto the
+ stack address for the arguments that were pushed onto the
stack. The return instruction will automatically pop the
arguments from the stack. */
numarg = get_frame_memory_unsigned (next_frame, addr, 1);
if (cache->base == 0)
return;
- (*this_id) = frame_id_build (cache->base, frame_pc_unwind (next_frame));
+ (*this_id) = frame_id_build (cache->base, frame_func_unwind (next_frame));
}
static void
vax_frame_prev_register (struct frame_info *next_frame, void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
struct vax_frame_cache *cache = vax_frame_cache (next_frame, this_cache);
- trad_frame_prev_register (next_frame, cache->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
}
static const struct frame_unwind vax_frame_unwind =
/* Assume that the argument pointer for the outermost frame is
hosed, as is the case on NetBSD/vax ELF. */
- if (get_frame_base (frame) == 0)
+ if (get_frame_base_address (frame) == 0)
return 0;
args = get_frame_register_unsigned (frame, VAX_AP_REGNUM);
gdbarch = gdbarch_alloc (&info, NULL);
+ set_gdbarch_float_format (gdbarch, &floatformat_vax_f);
+ set_gdbarch_double_format (gdbarch, &floatformat_vax_d);
+ set_gdbarch_long_double_format (gdbarch, &floatformat_vax_d);
+ set_gdbarch_long_double_bit(gdbarch, 64);
+
/* Register info */
set_gdbarch_num_regs (gdbarch, VAX_NUM_REGS);
set_gdbarch_register_name (gdbarch, vax_register_name);
set_gdbarch_pc_regnum (gdbarch, VAX_PC_REGNUM);
set_gdbarch_ps_regnum (gdbarch, VAX_PS_REGNUM);
+ set_gdbarch_regset_from_core_section
+ (gdbarch, vax_regset_from_core_section);
+
/* Frame and stack info */
set_gdbarch_skip_prologue (gdbarch, vax_skip_prologue);
set_gdbarch_frame_num_args (gdbarch, vax_frame_num_args);
-
set_gdbarch_frame_args_skip (gdbarch, 4);
/* Stack grows downward. */
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);
-
- /* 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_deprecated_call_dummy_words (gdbarch, vax_call_dummy_words);
- set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, sizeof_vax_call_dummy_words);
- set_gdbarch_deprecated_fix_call_dummy (gdbarch, vax_fix_call_dummy);
- set_gdbarch_deprecated_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_return_value (gdbarch, vax_return_value);
+
+ /* Call dummy code. */
+ set_gdbarch_push_dummy_call (gdbarch, vax_push_dummy_call);
+ set_gdbarch_unwind_dummy_id (gdbarch, vax_unwind_dummy_id);
/* Breakpoint info */
set_gdbarch_breakpoint_from_pc (gdbarch, vax_breakpoint_from_pc);
/* Misc info */
- set_gdbarch_function_start_offset (gdbarch, 2);
+ set_gdbarch_deprecated_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, deprecated_write_sp);
+ set_gdbarch_print_insn (gdbarch, print_insn_vax);
set_gdbarch_unwind_pc (gdbarch, vax_unwind_pc);
frame_unwind_append_sniffer (gdbarch, vax_frame_sniffer);
- set_gdbarch_print_insn (gdbarch, print_insn_vax);
-
return (gdbarch);
}
-extern initialize_file_ftype _initialize_vax_tdep; /* -Wmissing-prototypes */
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_vax_tdep (void);
void
_initialize_vax_tdep (void)
projects / deliverable / binutils-gdb.git / blobdiff