-/* 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) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#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 "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 the name of register REGNUM. */
static const char *
-vax_register_name (int regnum)
+vax_register_name (struct gdbarch *gdbarch, int regnum)
{
- static char *register_names[] =
+ static const char *register_names[] =
{
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc",
}
/* Return the GDB type object for the "standard" data type of data in
- register REGNUM. */
+ register REGNUM. */
static struct type *
vax_register_type (struct gdbarch *gdbarch, int regnum)
{
- return builtin_type_int;
+ return builtin_type (gdbarch)->builtin_int;
}
\f
+/* Core file support. */
+
+/* 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. */
-/* The VAX Unix calling convention uses R1 to pass a structure return
+static void
+vax_supply_gregset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const gdb_byte *regs = (const gdb_byte *) gregs;
+ int i;
+
+ for (i = 0; i < VAX_NUM_REGS; i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache->raw_supply (i, regs + i * 4);
+ }
+}
+
+/* VAX register set. */
+
+static const struct regset vax_gregset =
+{
+ NULL,
+ vax_supply_gregset
+};
+
+/* Iterate over core file register note sections. */
+
+static void
+vax_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ cb (".reg", VAX_NUM_REGS * 4, VAX_NUM_REGS * 4, &vax_gregset, NULL, cb_data);
+}
+\f
+/* 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. */
vax_store_arguments (struct regcache *regcache, int nargs,
struct value **args, CORE_ADDR sp)
{
- char buf[4];
+ struct gdbarch *gdbarch = regcache->arch ();
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[4];
int count = 0;
int i;
/* Push arguments in reverse order. */
for (i = nargs - 1; i >= 0; i--)
{
- int len = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[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);
+ write_memory (sp, value_contents_all (args[i]), len);
}
/* Push argument count. */
sp -= 4;
- store_unsigned_integer (buf, 4, count);
+ store_unsigned_integer (buf, 4, byte_order, count);
write_memory (sp, buf, 4);
/* Update the argument pointer. */
- store_unsigned_integer (buf, 4, sp);
- regcache_cooked_write (regcache, VAX_AP_REGNUM, buf);
+ store_unsigned_integer (buf, 4, byte_order, sp);
+ regcache->cooked_write (VAX_AP_REGNUM, buf);
return sp;
}
static CORE_ADDR
-vax_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_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,
+ struct value **args, CORE_ADDR sp,
+ function_call_return_method return_method,
CORE_ADDR struct_addr)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR fp = sp;
- char buf[4];
+ gdb_byte buf[4];
/* Set up the function arguments. */
sp = vax_store_arguments (regcache, nargs, args, sp);
/* Store return value address. */
- if (struct_return)
+ if (return_method == return_method_struct)
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);
+ store_unsigned_integer (buf, 4, byte_order, bp_addr);
write_memory (sp, buf, 4);
/* Store the (fake) frame pointer in the FP slot. */
sp -= 4;
- store_unsigned_integer (buf, 4, fp);
+ store_unsigned_integer (buf, 4, byte_order, fp);
write_memory (sp, buf, 4);
/* Skip the AP slot. */
/* Store register save mask and control bits. */
sp -= 4;
- store_unsigned_integer (buf, 4, 0);
+ store_unsigned_integer (buf, 4, byte_order, 0);
write_memory (sp, buf, 4);
/* Store condition handler. */
sp -= 4;
- store_unsigned_integer (buf, 4, 0);
+ store_unsigned_integer (buf, 4, byte_order, 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);
+ store_unsigned_integer (buf, 4, byte_order, sp);
+ regcache->cooked_write (VAX_SP_REGNUM, buf);
+ regcache->cooked_write (VAX_FP_REGNUM, buf);
/* Return the saved (fake) frame pointer. */
return fp;
}
static struct frame_id
-vax_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+vax_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
{
CORE_ADDR fp;
- fp = frame_unwind_register_unsigned (next_frame, VAX_FP_REGNUM);
- return frame_id_build (fp, frame_pc_unwind (next_frame));
+ fp = get_frame_register_unsigned (this_frame, VAX_FP_REGNUM);
+ return frame_id_build (fp, get_frame_pc (this_frame));
}
\f
static enum return_value_convention
-vax_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, void *readbuf,
- const void *writebuf)
+vax_return_value (struct gdbarch *gdbarch, struct value *function,
+ struct type *type, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
{
int len = TYPE_LENGTH (type);
- char buf[8];
+ gdb_byte buf[8];
+
+ if (type->code () == TYPE_CODE_STRUCT
+ || type->code () == TYPE_CODE_UNION
+ || type->code () == 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 (TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_ARRAY)
- return RETURN_VALUE_STRUCT_CONVENTION;
+ 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);
+ regcache->cooked_read (VAX_R0_REGNUM, buf);
if (len > 4)
- regcache_cooked_read (regcache, VAX_R1_REGNUM, buf + 4);
+ regcache->cooked_read (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);
+ regcache->cooked_write (VAX_R0_REGNUM, buf);
if (len > 4)
- regcache_cooked_write (regcache, VAX_R1_REGNUM, buf + 4);
+ regcache->cooked_write (VAX_R1_REGNUM, buf + 4);
}
return RETURN_VALUE_REGISTER_CONVENTION;
encode a breakpoint instruction, store the length of the string in
*LEN and optionally adjust *PC to point to the correct memory
location for inserting the breakpoint. */
-
-static const unsigned char *
-vax_breakpoint_from_pc (CORE_ADDR *pc, int *len)
-{
- static unsigned char break_insn[] = { 3 };
- *len = sizeof (break_insn);
- return break_insn;
-}
+constexpr gdb_byte vax_break_insn[] = { 3 };
+
+typedef BP_MANIPULATION (vax_break_insn) vax_breakpoint;
\f
/* Advance PC across any function entry prologue instructions
to reach some "real" code. */
static CORE_ADDR
-vax_skip_prologue (CORE_ADDR pc)
+vax_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- int op = (unsigned char) read_memory_integer (pc, 1);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte op = read_memory_unsigned_integer (pc, 1, byte_order);
+
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, byte_order) == 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, byte_order) == 0xAE
+ && read_memory_unsigned_integer (pc + 3, 1, byte_order) == 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, byte_order) == 0xCE
+ && read_memory_unsigned_integer (pc + 4, 1, byte_order) == 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, byte_order) == 0xEE
+ && read_memory_unsigned_integer (pc + 6, 1, byte_order) == 0x5E)
pc += 7; /* skip movab */
+
return pc;
}
\f
struct trad_frame_saved_reg *saved_regs;
};
-struct vax_frame_cache *
-vax_frame_cache (struct frame_info *next_frame, void **this_cache)
+static struct vax_frame_cache *
+vax_frame_cache (struct frame_info *this_frame, void **this_cache)
{
struct vax_frame_cache *cache;
CORE_ADDR addr;
int regnum;
if (*this_cache)
- return *this_cache;
+ return (struct vax_frame_cache *) *this_cache;
/* Allocate a new cache. */
cache = FRAME_OBSTACK_ZALLOC (struct vax_frame_cache);
- cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+ cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
/* The frame pointer is used as the base for the frame. */
- cache->base = frame_unwind_register_unsigned (next_frame, VAX_FP_REGNUM);
+ cache->base = get_frame_register_unsigned (this_frame, VAX_FP_REGNUM);
if (cache->base == 0)
return cache;
/* The register save mask and control bits determine the layout of
the stack frame. */
- mask = get_frame_memory_unsigned (next_frame, cache->base + 4, 4) >> 16;
+ mask = get_frame_memory_unsigned (this_frame, cache->base + 4, 4) >> 16;
/* These are always saved. */
cache->saved_regs[VAX_PC_REGNUM].addr = cache->base + 16;
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);
+ numarg = get_frame_memory_unsigned (this_frame, addr, 1);
addr += 4 + numarg * 4;
}
}
static void
-vax_frame_this_id (struct frame_info *next_frame, void **this_cache,
+vax_frame_this_id (struct frame_info *this_frame, void **this_cache,
struct frame_id *this_id)
{
- struct vax_frame_cache *cache = vax_frame_cache (next_frame, this_cache);
+ struct vax_frame_cache *cache = vax_frame_cache (this_frame, this_cache);
/* This marks the outermost frame. */
if (cache->base == 0)
return;
- (*this_id) = frame_id_build (cache->base, frame_pc_unwind (next_frame));
+ (*this_id) = frame_id_build (cache->base, get_frame_func (this_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)
+static struct value *
+vax_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
{
- struct vax_frame_cache *cache = vax_frame_cache (next_frame, this_cache);
+ struct vax_frame_cache *cache = vax_frame_cache (this_frame, this_cache);
- trad_frame_prev_register (next_frame, cache->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
}
static const struct frame_unwind vax_frame_unwind =
{
NORMAL_FRAME,
+ default_frame_unwind_stop_reason,
vax_frame_this_id,
- vax_frame_prev_register
+ vax_frame_prev_register,
+ NULL,
+ default_frame_sniffer
};
-
-static const struct frame_unwind *
-vax_frame_sniffer (struct frame_info *next_frame)
-{
- return &vax_frame_unwind;
-}
\f
static CORE_ADDR
-vax_frame_base_address (struct frame_info *next_frame, void **this_cache)
+vax_frame_base_address (struct frame_info *this_frame, void **this_cache)
{
- struct vax_frame_cache *cache = vax_frame_cache (next_frame, this_cache);
+ struct vax_frame_cache *cache = vax_frame_cache (this_frame, this_cache);
return cache->base;
}
static CORE_ADDR
-vax_frame_args_address (struct frame_info *next_frame, void **this_cache)
+vax_frame_args_address (struct frame_info *this_frame, void **this_cache)
{
- return frame_unwind_register_unsigned (next_frame, VAX_AP_REGNUM);
+ return get_frame_register_unsigned (this_frame, VAX_AP_REGNUM);
}
static const struct frame_base vax_frame_base =
/* 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);
return get_frame_memory_unsigned (frame, args, 1);
}
-static CORE_ADDR
-vax_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- return frame_unwind_register_unsigned (next_frame, VAX_PC_REGNUM);
-}
\f
/* Initialize the current architecture based on INFO. If possible, re-use an
gdbarch = gdbarch_alloc (&info, NULL);
+ set_gdbarch_float_format (gdbarch, floatformats_vax_f);
+ set_gdbarch_double_format (gdbarch, floatformats_vax_d);
+ set_gdbarch_long_double_format (gdbarch, floatformats_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_iterate_over_regset_sections
+ (gdbarch, vax_iterate_over_regset_sections);
+
/* 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. */
/* Call dummy code. */
set_gdbarch_push_dummy_call (gdbarch, vax_push_dummy_call);
- set_gdbarch_unwind_dummy_id (gdbarch, vax_unwind_dummy_id);
+ set_gdbarch_dummy_id (gdbarch, vax_dummy_id);
/* Breakpoint info */
- set_gdbarch_breakpoint_from_pc (gdbarch, vax_breakpoint_from_pc);
+ set_gdbarch_breakpoint_kind_from_pc (gdbarch, vax_breakpoint::kind_from_pc);
+ set_gdbarch_sw_breakpoint_from_kind (gdbarch, vax_breakpoint::bp_from_kind);
/* Misc info */
- set_gdbarch_function_start_offset (gdbarch, 2);
+ set_gdbarch_deprecated_function_start_offset (gdbarch, 2);
set_gdbarch_believe_pcc_promotion (gdbarch, 1);
- set_gdbarch_unwind_pc (gdbarch, vax_unwind_pc);
-
frame_base_set_default (gdbarch, &vax_frame_base);
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);
- frame_unwind_append_sniffer (gdbarch, vax_frame_sniffer);
-
- set_gdbarch_print_insn (gdbarch, print_insn_vax);
+ frame_unwind_append_unwinder (gdbarch, &vax_frame_unwind);
return (gdbarch);
}
-extern initialize_file_ftype _initialize_vax_tdep; /* -Wmissing-prototypes */
-
+void _initialize_vax_tdep ();
void
-_initialize_vax_tdep (void)
+_initialize_vax_tdep ()
{
gdbarch_register (bfd_arch_vax, vax_gdbarch_init, NULL);
}
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