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ports/devel/gdb/files/kgdb/mipsfbsd-kern.c

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/*
* Copyright (c) 2007 Juniper Networks, Inc.
* Copyright (c) 2004 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* from: src/gnu/usr.bin/gdb/kgdb/trgt_alpha.c,v 1.2.2.1 2005/09/15 05:32:10 marcel
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#ifdef __mips__
#include <machine/asm.h>
#include <machine/pcb.h>
#include <machine/frame.h>
#endif
#include <string.h>
#include <defs.h>
#include <frame-unwind.h>
//#include <target.h>
//#include <gdbthread.h>
//#include <inferior.h>
#include "osabi.h"
#include <regcache.h>
#include "solib.h"
#include "trad-frame.h"
#include <mips-tdep.h>
#include "kgdb.h"
/* Size of struct trapframe in registers. */
#define TRAPFRAME_WORDS 74
/* From sys/mips/include/pcb.h. Offsets in the pcb_context[] array. */
#define FBSD_PCB_REG_S0 0
#define FBSD_PCB_REG_S1 1
#define FBSD_PCB_REG_S2 2
#define FBSD_PCB_REG_S3 3
#define FBSD_PCB_REG_S4 4
#define FBSD_PCB_REG_S5 5
#define FBSD_PCB_REG_S6 6
#define FBSD_PCB_REG_S7 7
#define FBSD_PCB_REG_SP 8
#define FBSD_PCB_REG_S8 9
#define FBSD_PCB_REG_RA 10
#define FBSD_PCB_REG_SR 11
#define FBSD_PCB_REG_GP 12
#define FBSD_PCB_REG_PC 13
#ifdef __mips__
_Static_assert(TRAPFRAME_WORDS * sizeof(register_t) ==
sizeof(struct trapframe), "TRAPFRAME_WORDS mismatch");
_Static_assert(FBSD_PCB_REG_S0 == PCB_REG_S0, "PCB_REG_S0 mismatch");
_Static_assert(FBSD_PCB_REG_S1 == PCB_REG_S1, "PCB_REG_S1 mismatch");
_Static_assert(FBSD_PCB_REG_S2 == PCB_REG_S2, "PCB_REG_S2 mismatch");
_Static_assert(FBSD_PCB_REG_S3 == PCB_REG_S3, "PCB_REG_S3 mismatch");
_Static_assert(FBSD_PCB_REG_S4 == PCB_REG_S4, "PCB_REG_S4 mismatch");
_Static_assert(FBSD_PCB_REG_S5 == PCB_REG_S5, "PCB_REG_S5 mismatch");
_Static_assert(FBSD_PCB_REG_S6 == PCB_REG_S6, "PCB_REG_S6 mismatch");
_Static_assert(FBSD_PCB_REG_S7 == PCB_REG_S7, "PCB_REG_S7 mismatch");
_Static_assert(FBSD_PCB_REG_SP == PCB_REG_SP, "PCB_REG_SP mismatch");
_Static_assert(FBSD_PCB_REG_S8 == PCB_REG_S8, "PCB_REG_S8 mismatch");
_Static_assert(FBSD_PCB_REG_RA == PCB_REG_RA, "PCB_REG_RA mismatch");
_Static_assert(FBSD_PCB_REG_SR == PCB_REG_SR, "PCB_REG_SR mismatch");
_Static_assert(FBSD_PCB_REG_GP == PCB_REG_GP, "PCB_REG_GP mismatch");
_Static_assert(FBSD_PCB_REG_PC == PCB_REG_PC, "PCB_REG_PC mismatch");
#endif
static void
mipsfbsd_supply_pcb(struct regcache *regcache, CORE_ADDR pcb_addr)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
size_t regsize = mips_isa_regsize (gdbarch);
gdb_byte buf[regsize * (FBSD_PCB_REG_PC + 1)];
/* Read the entire pcb_context[] array in one go. The pcb_context[]
array is after the pcb_regs member which is a trapframe. */
if (target_read_memory (pcb_addr + TRAPFRAME_WORDS * regsize, buf,
sizeof(buf)) != 0)
return;
regcache_raw_supply_unsigned (regcache, MIPS_ZERO_REGNUM, 0);
regcache_raw_supply (regcache, MIPS_S2_REGNUM - 2,
buf + (regsize * FBSD_PCB_REG_S0));
regcache_raw_supply (regcache, MIPS_S2_REGNUM - 1,
buf + (regsize * FBSD_PCB_REG_S1));
regcache_raw_supply (regcache, MIPS_S2_REGNUM,
buf + (regsize * FBSD_PCB_REG_S2));
regcache_raw_supply (regcache, MIPS_S2_REGNUM + 1,
buf + (regsize * FBSD_PCB_REG_S3));
regcache_raw_supply (regcache, MIPS_S2_REGNUM + 2,
buf + (regsize * FBSD_PCB_REG_S4));
regcache_raw_supply (regcache, MIPS_S2_REGNUM + 3,
buf + (regsize * FBSD_PCB_REG_S5));
regcache_raw_supply (regcache, MIPS_S2_REGNUM + 4,
buf + (regsize * FBSD_PCB_REG_S6));
regcache_raw_supply (regcache, MIPS_S2_REGNUM + 5,
buf + (regsize * FBSD_PCB_REG_S7));
regcache_raw_supply (regcache, MIPS_SP_REGNUM,
buf + (regsize * FBSD_PCB_REG_SP));
regcache_raw_supply (regcache, MIPS_S2_REGNUM + 6,
buf + (regsize * FBSD_PCB_REG_S8));
regcache_raw_supply (regcache, MIPS_RA_REGNUM,
buf + (regsize * FBSD_PCB_REG_RA));
regcache_raw_supply (regcache, MIPS_PS_REGNUM,
buf + (regsize * FBSD_PCB_REG_SR));
regcache_raw_supply (regcache, MIPS_GP_REGNUM,
buf + (regsize * FBSD_PCB_REG_GP));
regcache_raw_supply (regcache, MIPS_EMBED_PC_REGNUM,
buf + (regsize * FBSD_PCB_REG_PC));
}
static struct trad_frame_cache *
mipsfbsd_trapframe_cache (struct frame_info *this_frame, void **this_cache)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
size_t regsize = mips_isa_regsize (gdbarch);
struct trad_frame_cache *cache;
CORE_ADDR addr, func, pc, sp;
int regnum;
if (*this_cache != NULL)
return ((struct trad_frame_cache *)*this_cache);
cache = trad_frame_cache_zalloc (this_frame);
*this_cache = cache;
func = get_frame_func (this_frame);
sp = get_frame_register_signed (this_frame,
MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch));
/* Skip over CALLFRAME_SIZ. */
addr = sp;
if (regsize == 8)
addr += regsize * 4;
else
addr += regsize * (4 + 2);
/* GPRs. Skip zero. */
addr += regsize;
for (regnum = MIPS_AT_REGNUM; regnum <= MIPS_RA_REGNUM; regnum++)
{
trad_frame_set_reg_addr (cache,
regnum + gdbarch_num_regs (gdbarch),
addr);
addr += regsize;
}
regnum = MIPS_PS_REGNUM;
trad_frame_set_reg_addr (cache,
regnum + gdbarch_num_regs (gdbarch),
addr);
addr += regsize;
/* HI and LO. */
regnum = mips_regnum (gdbarch)->lo;
trad_frame_set_reg_addr (cache,
regnum + gdbarch_num_regs (gdbarch),
addr);
addr += regsize;
regnum = mips_regnum (gdbarch)->hi;
trad_frame_set_reg_addr (cache,
regnum + gdbarch_num_regs (gdbarch),
addr);
addr += regsize;
/* BADVADDR. */
regnum = mips_regnum (gdbarch)->badvaddr;
trad_frame_set_reg_addr (cache,
regnum + gdbarch_num_regs (gdbarch),
addr);
addr += regsize;
/* CAUSE. */
regnum = mips_regnum (gdbarch)->cause;
trad_frame_set_reg_addr (cache,
regnum + gdbarch_num_regs (gdbarch),
addr);
addr += regsize;
/* PC. */
regnum = mips_regnum (gdbarch)->pc;
trad_frame_set_reg_addr (cache,
regnum + gdbarch_num_regs (gdbarch),
addr);
trad_frame_set_id (cache, frame_id_build (sp + TRAPFRAME_WORDS * regsize,
func));
return cache;
}
static void
mipsfbsd_trapframe_this_id (struct frame_info *this_frame,
void **this_cache, struct frame_id *this_id)
{
struct trad_frame_cache *cache =
mipsfbsd_trapframe_cache (this_frame, this_cache);
trad_frame_get_id (cache, this_id);
}
static struct value *
mipsfbsd_trapframe_prev_register (struct frame_info *this_frame,
void **this_cache, int regnum)
{
struct trad_frame_cache *cache =
mipsfbsd_trapframe_cache (this_frame, this_cache);
return trad_frame_get_register (cache, this_frame, regnum);
}
static int
mipsfbsd_trapframe_sniffer (const struct frame_unwind *self,
struct frame_info *this_frame,
void **this_prologue_cache)
{
const char *name;
find_pc_partial_function (get_frame_func (this_frame), &name, NULL, NULL);
return (name && ((strcmp(name, "MipsKernIntr") == 0) ||
(strcmp(name, "MipsKernGenException") == 0) ||
(strcmp(name, "MipsTLBInvalidException") == 0)));
}
static const struct frame_unwind mipsfbsd_trapframe_unwind = {
SIGTRAMP_FRAME,
default_frame_unwind_stop_reason,
mipsfbsd_trapframe_this_id,
mipsfbsd_trapframe_prev_register,
NULL,
mipsfbsd_trapframe_sniffer
};
static void
mipsfbsd_kernel_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
enum mips_abi abi = mips_abi (gdbarch);
set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
switch (abi)
{
case MIPS_ABI_O32:
break;
case MIPS_ABI_N32:
set_gdbarch_long_double_bit (gdbarch, 128);
/* These floatformats should probably be renamed. MIPS uses
the same 128-bit IEEE floating point format that IA-64 uses,
except that the quiet/signalling NaN bit is reversed (GDB
does not distinguish between quiet and signalling NaNs). */
set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
break;
case MIPS_ABI_N64:
set_gdbarch_long_double_bit (gdbarch, 128);
/* These floatformats should probably be renamed. MIPS uses
the same 128-bit IEEE floating point format that IA-64 uses,
except that the quiet/signalling NaN bit is reversed (GDB
does not distinguish between quiet and signalling NaNs). */
set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
break;
}
frame_unwind_prepend_unwinder (gdbarch, &mipsfbsd_trapframe_unwind);
set_solib_ops (gdbarch, &kld_so_ops);
fbsd_vmcore_set_supply_pcb (gdbarch, mipsfbsd_supply_pcb);
fbsd_vmcore_set_cpu_pcb_addr (gdbarch, kgdb_trgt_stop_pcb);
}
void _initialize_mips_kgdb_tdep (void);
void
_initialize_mips_kgdb_tdep (void)
{
gdbarch_register_osabi_sniffer(bfd_arch_mips,
bfd_target_elf_flavour,
fbsd_kernel_osabi_sniffer);
gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_FREEBSD_ELF_KERNEL,
mipsfbsd_kernel_init_abi);
}
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