254 lines
7.3 KiB
C
254 lines
7.3 KiB
C
/*
|
|
* 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>
|
|
#include <machine/asm.h>
|
|
#include <machine/pcb.h>
|
|
#include <machine/frame.h>
|
|
#include <err.h>
|
|
#include <kvm.h>
|
|
#include <string.h>
|
|
|
|
#include <defs.h>
|
|
#include <target.h>
|
|
#include <gdbthread.h>
|
|
#include <inferior.h>
|
|
#include <regcache.h>
|
|
#include <frame-unwind.h>
|
|
#include <mips-tdep.h>
|
|
|
|
#ifndef CROSS_DEBUGGER
|
|
#include <machine/pcb.h>
|
|
#endif
|
|
|
|
#include "kgdb.h"
|
|
|
|
CORE_ADDR
|
|
kgdb_trgt_core_pcb(u_int cpuid)
|
|
{
|
|
return (kgdb_trgt_stop_pcb(cpuid, sizeof(struct pcb)));
|
|
}
|
|
|
|
void
|
|
kgdb_trgt_fetch_registers(int regno __unused)
|
|
{
|
|
#ifndef CROSS_DEBUGGER
|
|
struct kthr *kt;
|
|
struct pcb pcb;
|
|
|
|
kt = kgdb_thr_lookup_tid(ptid_get_pid(inferior_ptid));
|
|
if (kt == NULL)
|
|
return;
|
|
if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) {
|
|
warnx("kvm_read: %s", kvm_geterr(kvm));
|
|
memset(&pcb, 0, sizeof(pcb));
|
|
}
|
|
|
|
supply_register(MIPS_S0_REGNUM, (char *)&pcb.pcb_context[PCB_REG_S0]);
|
|
supply_register(MIPS_S1_REGNUM, (char *)&pcb.pcb_context[PCB_REG_S1]);
|
|
supply_register(MIPS_S2_REGNUM, (char *)&pcb.pcb_context[PCB_REG_S2]);
|
|
supply_register(MIPS_S3_REGNUM, (char *)&pcb.pcb_context[PCB_REG_S3]);
|
|
supply_register(MIPS_S4_REGNUM, (char *)&pcb.pcb_context[PCB_REG_S4]);
|
|
supply_register(MIPS_S5_REGNUM, (char *)&pcb.pcb_context[PCB_REG_S5]);
|
|
supply_register(MIPS_S6_REGNUM, (char *)&pcb.pcb_context[PCB_REG_S6]);
|
|
supply_register(MIPS_S7_REGNUM, (char *)&pcb.pcb_context[PCB_REG_S7]);
|
|
supply_register(MIPS_SP_REGNUM, (char *)&pcb.pcb_context[PCB_REG_SP]);
|
|
supply_register(MIPS_FP_REGNUM, (char *)&pcb.pcb_context[PCB_REG_GP]);
|
|
supply_register(MIPS_RA_REGNUM, (char *)&pcb.pcb_context[PCB_REG_RA]);
|
|
supply_register(MIPS_EMBED_PC_REGNUM, (char *)&pcb.pcb_context[PCB_REG_PC]);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
kgdb_trgt_store_registers(int regno __unused)
|
|
{
|
|
|
|
fprintf_unfiltered(gdb_stderr, "Unimplemented function: %s\n", __func__);
|
|
}
|
|
|
|
void
|
|
kgdb_trgt_new_objfile(struct objfile *objfile)
|
|
{
|
|
}
|
|
|
|
#ifndef CROSS_DEBUGGER
|
|
struct kgdb_frame_cache {
|
|
CORE_ADDR pc;
|
|
CORE_ADDR sp;
|
|
};
|
|
|
|
static int kgdb_trgt_frame_offset[] = {
|
|
offsetof(struct trapframe, zero),
|
|
offsetof(struct trapframe, ast),
|
|
offsetof(struct trapframe, v0),
|
|
offsetof(struct trapframe, v1),
|
|
offsetof(struct trapframe, a0),
|
|
offsetof(struct trapframe, a1),
|
|
offsetof(struct trapframe, a2),
|
|
offsetof(struct trapframe, a3),
|
|
#if defined(__mips_n32) || defined(__mips_n64)
|
|
offsetof(struct trapframe, a4),
|
|
offsetof(struct trapframe, a5),
|
|
offsetof(struct trapframe, a6),
|
|
offsetof(struct trapframe, a7),
|
|
offsetof(struct trapframe, t0),
|
|
offsetof(struct trapframe, t1),
|
|
offsetof(struct trapframe, t2),
|
|
offsetof(struct trapframe, t3),
|
|
#else
|
|
offsetof(struct trapframe, t0),
|
|
offsetof(struct trapframe, t1),
|
|
offsetof(struct trapframe, t2),
|
|
offsetof(struct trapframe, t3),
|
|
offsetof(struct trapframe, t4),
|
|
offsetof(struct trapframe, t5),
|
|
offsetof(struct trapframe, t6),
|
|
offsetof(struct trapframe, t7),
|
|
#endif
|
|
offsetof(struct trapframe, s0),
|
|
offsetof(struct trapframe, s1),
|
|
offsetof(struct trapframe, s2),
|
|
offsetof(struct trapframe, s3),
|
|
offsetof(struct trapframe, s4),
|
|
offsetof(struct trapframe, s5),
|
|
offsetof(struct trapframe, s6),
|
|
offsetof(struct trapframe, s7),
|
|
offsetof(struct trapframe, t8),
|
|
offsetof(struct trapframe, t9),
|
|
offsetof(struct trapframe, k0),
|
|
offsetof(struct trapframe, k1),
|
|
offsetof(struct trapframe, gp),
|
|
offsetof(struct trapframe, sp),
|
|
offsetof(struct trapframe, s8),
|
|
offsetof(struct trapframe, ra),
|
|
};
|
|
|
|
static struct kgdb_frame_cache *
|
|
kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache)
|
|
{
|
|
char buf[MAX_REGISTER_SIZE];
|
|
struct kgdb_frame_cache *cache;
|
|
|
|
cache = *this_cache;
|
|
if (cache == NULL) {
|
|
cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache);
|
|
*this_cache = cache;
|
|
cache->pc = frame_func_unwind(next_frame);
|
|
frame_unwind_register(next_frame, SP_REGNUM, buf);
|
|
cache->sp = extract_unsigned_integer(buf,
|
|
register_size(current_gdbarch, SP_REGNUM));
|
|
}
|
|
return (cache);
|
|
}
|
|
|
|
static void
|
|
kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache,
|
|
struct frame_id *this_id)
|
|
{
|
|
struct kgdb_frame_cache *cache;
|
|
|
|
cache = kgdb_trgt_frame_cache(next_frame, this_cache);
|
|
*this_id = frame_id_build(cache->sp, cache->pc);
|
|
}
|
|
|
|
static void
|
|
kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame __unused,
|
|
void **this_cache __unused, int regnum __unused, int *optimizedp __unused,
|
|
enum lval_type *lvalp __unused, CORE_ADDR *addrp __unused,
|
|
int *realnump __unused, void *valuep __unused)
|
|
{
|
|
char dummy_valuep[MAX_REGISTER_SIZE];
|
|
struct kgdb_frame_cache *cache;
|
|
int ofs, regsz;
|
|
|
|
regsz = register_size(current_gdbarch, regnum);
|
|
|
|
if (valuep == NULL)
|
|
valuep = dummy_valuep;
|
|
memset(valuep, 0, regsz);
|
|
*optimizedp = 0;
|
|
*addrp = 0;
|
|
*lvalp = not_lval;
|
|
*realnump = -1;
|
|
|
|
ofs = (regnum >= 0 && regnum <= MIPS_RA_REGNUM) ?
|
|
kgdb_trgt_frame_offset[regnum] : -1;
|
|
if (ofs == -1)
|
|
return;
|
|
|
|
cache = kgdb_trgt_frame_cache(next_frame, this_cache);
|
|
*addrp = cache->sp + ofs * 8;
|
|
*lvalp = lval_memory;
|
|
target_read_memory(*addrp, valuep, regsz);
|
|
}
|
|
|
|
static const struct frame_unwind kgdb_trgt_trapframe_unwind = {
|
|
UNKNOWN_FRAME,
|
|
&kgdb_trgt_trapframe_this_id,
|
|
&kgdb_trgt_trapframe_prev_register
|
|
};
|
|
#endif
|
|
|
|
const struct frame_unwind *
|
|
kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
|
|
{
|
|
#ifndef CROSS_DEBUGGER
|
|
char *pname;
|
|
CORE_ADDR pc;
|
|
|
|
pc = frame_pc_unwind(next_frame);
|
|
pname = NULL;
|
|
find_pc_partial_function(pc, &pname, NULL, NULL);
|
|
if (pname == NULL)
|
|
return (NULL);
|
|
if ((strcmp(pname, "MipsKernIntr") == 0) ||
|
|
(strcmp(pname, "MipsKernGenException") == 0) ||
|
|
(strcmp(pname, "MipsUserIntr") == 0) ||
|
|
(strcmp(pname, "MipsUserGenException") == 0))
|
|
return (&kgdb_trgt_trapframe_unwind);
|
|
#endif
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* This function ensures, that the PC is inside the
|
|
* function section which is understood by GDB.
|
|
*
|
|
* Return 0 when fixup is necessary, -1 otherwise.
|
|
*/
|
|
int
|
|
kgdb_trgt_pc_fixup(CORE_ADDR *pc __unused)
|
|
{
|
|
|
|
return (-1);
|
|
}
|