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freebsd-dev/gnu/usr.bin/gdb/kgdb/trgt_ia64.c
John Baldwin 53df73db45 - Change how the vmcore target maps FreeBSD thread IDs to GDB ptids. We 
now only use the TID and ignore the PID and use pid_to_ptid() to build a
  ptid treating the TID as a PID.  The benefit of this is that the vmcore
  target now uses the same scheme as GDB's remote targets.  As a result,
  the 'tid' command now works for remote targets (however, it only accepts
  TIDs and not addresses of 'struct thread' objects).
- Use gdb_thread_select() to do the actual thread switch for the 'tid' and
  'proc' commands.  This now gives the same UI feedback when switching
  threads as the GDB 'thread' command rather than providing no visual
  output at all.

MFC after:	1 week
2008-05-01 20:36:48 +00:00

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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_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));
}
/* 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__);
}
void
kgdb_trgt_new_objfile(struct objfile *objfile)
{
}
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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