mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-04 09:09:56 +00:00
Add initial support for kgdb(1) on PowerPC.
This commit is contained in:
parent
512b2fb1b5
commit
8788b6eb7a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=161589
@ -1,9 +1,5 @@
|
||||
# $FreeBSD$
|
||||
|
||||
SUBDIR= doc libgdb gdb gdbtui
|
||||
|
||||
.if ${MACHINE_ARCH} != "powerpc"
|
||||
SUBDIR+= kgdb
|
||||
.endif
|
||||
SUBDIR= doc libgdb gdb gdbtui kgdb
|
||||
|
||||
.include <bsd.subdir.mk>
|
||||
|
185
gnu/usr.bin/gdb/kgdb/trgt_powerpc.c
Normal file
185
gnu/usr.bin/gdb/kgdb/trgt_powerpc.c
Normal file
@ -0,0 +1,185 @@
|
||||
/*-
|
||||
* Copyright (c) 2006 Marcel Moolenaar
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/types.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 <ppc-tdep.h>
|
||||
|
||||
#include "kgdb.h"
|
||||
|
||||
void
|
||||
kgdb_trgt_fetch_registers(int regno __unused)
|
||||
{
|
||||
struct kthr *kt;
|
||||
struct pcb pcb;
|
||||
struct gdbarch_tdep *tdep;
|
||||
int i;
|
||||
|
||||
tdep = gdbarch_tdep (current_gdbarch);
|
||||
|
||||
kt = kgdb_thr_lookup_tid(ptid_get_tid(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));
|
||||
}
|
||||
|
||||
/*
|
||||
* r14-r31 are saved in the pcb
|
||||
*/
|
||||
for (i = 14; i <= 31; i++) {
|
||||
supply_register(tdep->ppc_gp0_regnum + i,
|
||||
(char *)&pcb.pcb_context[i]);
|
||||
}
|
||||
|
||||
/* r1 is saved in the sp field */
|
||||
supply_register(tdep->ppc_gp0_regnum + 1, (char *)&pcb.pcb_sp);
|
||||
|
||||
supply_register(tdep->ppc_lr_regnum, (char *)&pcb.pcb_lr);
|
||||
supply_register(tdep->ppc_cr_regnum, (char *)&pcb.pcb_cr);
|
||||
}
|
||||
|
||||
void
|
||||
kgdb_trgt_store_registers(int regno __unused)
|
||||
{
|
||||
fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__);
|
||||
}
|
||||
|
||||
struct kgdb_frame_cache {
|
||||
CORE_ADDR pc;
|
||||
CORE_ADDR sp;
|
||||
};
|
||||
|
||||
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,
|
||||
void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp,
|
||||
CORE_ADDR *addrp, int *realnump, void *valuep)
|
||||
{
|
||||
char dummy_valuep[MAX_REGISTER_SIZE];
|
||||
struct gdbarch_tdep *tdep;
|
||||
struct kgdb_frame_cache *cache;
|
||||
int ofs, regsz;
|
||||
|
||||
tdep = gdbarch_tdep(current_gdbarch);
|
||||
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;
|
||||
|
||||
if (regnum >= tdep->ppc_gp0_regnum &&
|
||||
regnum <= tdep->ppc_gplast_regnum)
|
||||
ofs = offsetof(struct trapframe,
|
||||
fixreg[regnum - tdep->ppc_gp0_regnum]);
|
||||
else if (regnum == tdep->ppc_lr_regnum)
|
||||
ofs = offsetof(struct trapframe, lr);
|
||||
else if (regnum == tdep->ppc_cr_regnum)
|
||||
ofs = offsetof(struct trapframe, cr);
|
||||
else if (regnum == tdep->ppc_xer_regnum)
|
||||
ofs = offsetof(struct trapframe, xer);
|
||||
else if (regnum == tdep->ppc_ctr_regnum)
|
||||
ofs = offsetof(struct trapframe, ctr);
|
||||
else if (regnum == PC_REGNUM)
|
||||
ofs = offsetof(struct trapframe, srr0);
|
||||
else
|
||||
return;
|
||||
|
||||
cache = kgdb_trgt_frame_cache(next_frame, this_cache);
|
||||
*addrp = cache->sp + 8 + ofs;
|
||||
*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
|
||||
};
|
||||
|
||||
const struct frame_unwind *
|
||||
kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
|
||||
{
|
||||
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, "asttrapexit") == 0 ||
|
||||
strcmp(pname, "trapexit") == 0)
|
||||
return (&kgdb_trgt_trapframe_unwind);
|
||||
/* printf("%s: %llx =%s\n", __func__, pc, pname); */
|
||||
return (NULL);
|
||||
}
|
Loading…
Reference in New Issue
Block a user