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freebsd-nq/gnu/usr.bin/gdb/kgdb/trgt_ia64.c
Marcel Moolenaar 4784fd9ce2 Unwind across trap frames. Handles all entry points, except the EPC 
syscall. This is an entry from userland anyway.

MFC after: 1 week
2005-09-11 00:47:03 +00:00

315 lines
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/*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <machine/frame.h>
#include <machine/md_var.h>
#include <machine/pcb.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 <ia64-tdep.h>
#include "kgdb.h"
void
kgdb_trgt_fetch_registers(int regno __unused)
{
struct kthr *kt;
struct pcb pcb;
uint64_t r;
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));
}
/* Registers 0-127: general registers. */
supply_register(IA64_GR1_REGNUM, (char *)&pcb.pcb_special.gp);
supply_register(IA64_GR4_REGNUM, (char *)&pcb.pcb_preserved.gr4);
supply_register(IA64_GR5_REGNUM, (char *)&pcb.pcb_preserved.gr5);
supply_register(IA64_GR6_REGNUM, (char *)&pcb.pcb_preserved.gr6);
supply_register(IA64_GR7_REGNUM, (char *)&pcb.pcb_preserved.gr7);
supply_register(IA64_GR12_REGNUM, (char *)&pcb.pcb_special.sp);
supply_register(IA64_GR12_REGNUM+1, (char *)&pcb.pcb_special.tp);
/* Registers 128-255: floating-point registers. */
supply_register(IA64_FR2_REGNUM, (char *)&pcb.pcb_preserved_fp.fr2);
supply_register(IA64_FR2_REGNUM+1, (char *)&pcb.pcb_preserved_fp.fr3);
supply_register(IA64_FR2_REGNUM+2, (char *)&pcb.pcb_preserved_fp.fr4);
supply_register(IA64_FR2_REGNUM+3, (char *)&pcb.pcb_preserved_fp.fr5);
supply_register(IA64_FR16_REGNUM, (char *)&pcb.pcb_preserved_fp.fr16);
supply_register(IA64_FR16_REGNUM+1, (char*)&pcb.pcb_preserved_fp.fr17);
supply_register(IA64_FR16_REGNUM+2, (char*)&pcb.pcb_preserved_fp.fr18);
supply_register(IA64_FR16_REGNUM+3, (char*)&pcb.pcb_preserved_fp.fr19);
supply_register(IA64_FR16_REGNUM+4, (char*)&pcb.pcb_preserved_fp.fr20);
supply_register(IA64_FR16_REGNUM+5, (char*)&pcb.pcb_preserved_fp.fr21);
supply_register(IA64_FR16_REGNUM+6, (char*)&pcb.pcb_preserved_fp.fr22);
supply_register(IA64_FR16_REGNUM+7, (char*)&pcb.pcb_preserved_fp.fr23);
supply_register(IA64_FR16_REGNUM+8, (char*)&pcb.pcb_preserved_fp.fr24);
supply_register(IA64_FR16_REGNUM+9, (char*)&pcb.pcb_preserved_fp.fr25);
supply_register(IA64_FR16_REGNUM+10,(char*)&pcb.pcb_preserved_fp.fr26);
supply_register(IA64_FR16_REGNUM+11,(char*)&pcb.pcb_preserved_fp.fr27);
supply_register(IA64_FR16_REGNUM+12,(char*)&pcb.pcb_preserved_fp.fr28);
supply_register(IA64_FR16_REGNUM+13,(char*)&pcb.pcb_preserved_fp.fr29);
supply_register(IA64_FR16_REGNUM+14,(char*)&pcb.pcb_preserved_fp.fr30);
supply_register(IA64_FR16_REGNUM+15,(char*)&pcb.pcb_preserved_fp.fr31);
/* Registers 320-327: branch registers. */
if (pcb.pcb_special.__spare == ~0UL)
supply_register(IA64_BR0_REGNUM, (char *)&pcb.pcb_special.rp);
supply_register(IA64_BR1_REGNUM, (char *)&pcb.pcb_preserved.br1);
supply_register(IA64_BR2_REGNUM, (char *)&pcb.pcb_preserved.br2);
supply_register(IA64_BR3_REGNUM, (char *)&pcb.pcb_preserved.br3);
supply_register(IA64_BR4_REGNUM, (char *)&pcb.pcb_preserved.br4);
supply_register(IA64_BR5_REGNUM, (char *)&pcb.pcb_preserved.br5);
/* Registers 328-333: misc. other registers. */
supply_register(IA64_PR_REGNUM, (char *)&pcb.pcb_special.pr);
if (pcb.pcb_special.__spare == ~0UL) {
r = pcb.pcb_special.iip + ((pcb.pcb_special.psr >> 41) & 3);
supply_register(IA64_IP_REGNUM, (char *)&r);
supply_register(IA64_CFM_REGNUM, (char *)&pcb.pcb_special.cfm);
} else {
supply_register(IA64_IP_REGNUM, (char *)&pcb.pcb_special.rp);
supply_register(IA64_CFM_REGNUM, (char *)&pcb.pcb_special.pfs);
}
/* Registers 334-461: application registers. */
supply_register(IA64_RSC_REGNUM, (char *)&pcb.pcb_special.rsc);
r = pcb.pcb_special.bspstore;
if (pcb.pcb_special.__spare == ~0UL)
r += pcb.pcb_special.ndirty;
else
r = ia64_bsp_adjust(r, IA64_CFM_SOF(pcb.pcb_special.pfs) -
IA64_CFM_SOL(pcb.pcb_special.pfs));
supply_register(IA64_BSP_REGNUM, (char *)&r);
supply_register(IA64_BSPSTORE_REGNUM, (char *)&r);
supply_register(IA64_RNAT_REGNUM, (char *)&pcb.pcb_special.rnat);
supply_register(IA64_UNAT_REGNUM, (char *)&pcb.pcb_special.unat);
supply_register(IA64_FPSR_REGNUM, (char *)&pcb.pcb_special.fpsr);
if (pcb.pcb_special.__spare == ~0UL)
supply_register(IA64_PFS_REGNUM, (char *)&pcb.pcb_special.pfs);
supply_register(IA64_LC_REGNUM, (char *)&pcb.pcb_preserved.lc);
}
void
kgdb_trgt_store_registers(int regno __unused)
{
fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__);
}
struct kgdb_frame_cache {
CORE_ADDR bsp;
CORE_ADDR ip;
CORE_ADDR sp;
CORE_ADDR saved_bsp;
};
#define SPECIAL(x) offsetof(struct trapframe, tf_special) \
+ offsetof(struct _special, x)
#define SCRATCH(x) offsetof(struct trapframe, tf_scratch) \
+ offsetof(struct _caller_saved, x)
#define SCRATCH_FP(x) offsetof(struct trapframe, tf_scratch_fp) \
+ offsetof(struct _caller_saved_fp, x)
static int kgdb_trgt_frame_ofs_gr[32] = {
-1, /* gr0 */
SPECIAL(gp),
SCRATCH(gr2), SCRATCH(gr3),
-1, -1, -1, -1, /* gr4-gr7 */
SCRATCH(gr8), SCRATCH(gr9), SCRATCH(gr10), SCRATCH(gr11),
SPECIAL(sp), SPECIAL(tp),
SCRATCH(gr14), SCRATCH(gr15), SCRATCH(gr16), SCRATCH(gr17),
SCRATCH(gr18), SCRATCH(gr19), SCRATCH(gr20), SCRATCH(gr21),
SCRATCH(gr22), SCRATCH(gr23), SCRATCH(gr24), SCRATCH(gr25),
SCRATCH(gr26), SCRATCH(gr27), SCRATCH(gr28), SCRATCH(gr29),
SCRATCH(gr30), SCRATCH(gr31)
};
static int kgdb_trgt_frame_ofs_fr[32] = {
-1, /* fr0: constant 0.0 */
-1, /* fr1: constant 1.0 */
-1, -1, -1, -1, /* fr2-fr5 */
SCRATCH_FP(fr6), SCRATCH_FP(fr7), SCRATCH_FP(fr8), SCRATCH_FP(fr9),
SCRATCH_FP(fr10), SCRATCH_FP(fr11), SCRATCH_FP(fr12), SCRATCH_FP(fr13),
SCRATCH_FP(fr14), SCRATCH_FP(fr15)
};
static int kgdb_trgt_frame_ofs_br[8] = {
SPECIAL(rp),
-1, -1, -1, -1, -1, /* br1-br5 */
SCRATCH(br6), SCRATCH(br7)
};
static int kgdb_trgt_frame_ofs_ar[49] = {
/* ar0-ar15 */
SPECIAL(rsc),
-1, /* ar.bsp */
SPECIAL(bspstore), SPECIAL(rnat),
-1, -1, -1, -1, -1, /* ar20-ar24 */
SCRATCH(csd), SCRATCH(ssd),
-1, -1, -1, -1, -1, /* ar27-ar31 */
SCRATCH(ccv),
-1, -1, -1, /* ar33-ar35 */
SPECIAL(unat),
-1, -1, -1, /* ar37-ar39 */
SPECIAL(fpsr),
-1, -1, -1, -1, -1, -1, -1, /* ar41-ar47 */
-1, -1, -1, -1, -1, -1, -1, -1, /* ar48-ar55 */
-1, -1, -1, -1, -1, -1, -1, -1, /* ar56-ar63 */
SPECIAL(pfs)
};
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;
frame_unwind_register(next_frame, IA64_BSP_REGNUM, buf);
cache->bsp = extract_unsigned_integer(buf,
register_size(current_gdbarch, IA64_BSP_REGNUM));
cache->ip = 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_special(cache->sp, cache->ip, cache->bsp);
}
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 buf[MAX_REGISTER_SIZE];
char dummy_valuep[MAX_REGISTER_SIZE];
struct kgdb_frame_cache *cache;
CORE_ADDR bsp;
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;
cache = kgdb_trgt_frame_cache(next_frame, this_cache);
if (regnum == IA64_BSP_REGNUM) {
if (cache->saved_bsp == 0) {
target_read_memory(cache->sp + 16 + SPECIAL(bspstore),
buf, regsz);
bsp = extract_unsigned_integer(buf, regsz);
target_read_memory(cache->sp + 16 + SPECIAL(ndirty),
buf, regsz);
bsp += extract_unsigned_integer(buf, regsz);
cache->saved_bsp = bsp;
}
store_unsigned_integer(valuep, regsz, cache->saved_bsp);
return;
}
if (regnum == IA64_PR_REGNUM)
ofs = SPECIAL(pr);
else if (regnum == IA64_IP_REGNUM)
ofs = SPECIAL(iip);
else if (regnum == IA64_PSR_REGNUM)
ofs = SPECIAL(psr);
else if (regnum == IA64_CFM_REGNUM)
ofs = SPECIAL(cfm);
else if (regnum >= IA64_GR0_REGNUM && regnum <= IA64_GR31_REGNUM)
ofs = kgdb_trgt_frame_ofs_gr[regnum - IA64_GR0_REGNUM];
else if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR15_REGNUM)
ofs = kgdb_trgt_frame_ofs_fr[regnum - IA64_FR0_REGNUM];
else if (regnum >= IA64_BR0_REGNUM && regnum <= IA64_BR7_REGNUM)
ofs = kgdb_trgt_frame_ofs_br[regnum - IA64_BR0_REGNUM];
else if (regnum >= IA64_RSC_REGNUM && regnum <= IA64_PFS_REGNUM)
ofs = kgdb_trgt_frame_ofs_ar[regnum - IA64_RSC_REGNUM];
else
ofs = -1;
if (ofs == -1)
return;
*addrp = cache->sp + 16 + 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 ip;
ip = frame_func_unwind(next_frame);
pname = NULL;
find_pc_partial_function(ip, &pname, NULL, NULL);
if (pname == NULL)
return (NULL);
if (strncmp(pname, "ivt_", 4) == 0)
return (&kgdb_trgt_trapframe_unwind);
/* printf("%s: %lx =%s\n", __func__, ip, pname); */
return (NULL);
}
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