system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-10-03 23:28:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

Unwind across trapframes. All kernel entries are handled.

Browse source 
MFC after: 1 week
This commit is contained in:
Marcel Moolenaar 2005-09-10 23:11:54 +00:00
parent 1dd0aa0c18
commit 2a5bd389cf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=149965
1 changed files with 94 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

105
gnu/usr.bin/gdb/kgdb/trgt_alpha.c
View file

@ -29,6 +29,7 @@ __FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <machine/pcb.h>
#include <machine/frame.h>
#include <err.h>
#include <kvm.h>
#include <string.h>
@ -39,6 +40,7 @@ __FBSDID("$FreeBSD$");
#include <inferior.h>
#include <regcache.h>
#include <frame-unwind.h>
#include <alpha-tdep.h>
#include "kgdb.h"
@ -55,16 +57,17 @@ kgdb_trgt_fetch_registers(int regno __unused)
warnx("kvm_read: %s", kvm_geterr(kvm));
memset(&pcb, 0, sizeof(pcb));
}
supply_register(9, (char *)&pcb.pcb_context[0]);
supply_register(10, (char *)&pcb.pcb_context[1]);
supply_register(11, (char *)&pcb.pcb_context[2]);
supply_register(12, (char *)&pcb.pcb_context[3]);
supply_register(13, (char *)&pcb.pcb_context[4]);
supply_register(14, (char *)&pcb.pcb_context[5]);
supply_register(15, (char *)&pcb.pcb_context[6]);
supply_register(30, (char *)&pcb.pcb_hw.apcb_ksp);
supply_register(64, (char *)&pcb.pcb_context[7]);
#define ALPHA_S0_REGNUM ALPHA_T7_REGNUM + 1
supply_register(ALPHA_S0_REGNUM + 0, (char *)&pcb.pcb_context[0]);
supply_register(ALPHA_S0_REGNUM + 1, (char *)&pcb.pcb_context[1]);
supply_register(ALPHA_S0_REGNUM + 2, (char *)&pcb.pcb_context[2]);
supply_register(ALPHA_S0_REGNUM + 3, (char *)&pcb.pcb_context[3]);
supply_register(ALPHA_S0_REGNUM + 4, (char *)&pcb.pcb_context[4]);
supply_register(ALPHA_S0_REGNUM + 5, (char *)&pcb.pcb_context[5]);
supply_register(ALPHA_S0_REGNUM + 6, (char *)&pcb.pcb_context[6]);
supply_register(ALPHA_SP_REGNUM, (char *)&pcb.pcb_hw.apcb_ksp);
supply_register(ALPHA_PC_REGNUM, (char *)&pcb.pcb_context[7]);
#undef ALPHA_S0_REGNUM
}
void
@ -73,10 +76,57 @@ 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 int kgdb_trgt_frame_offset[65] = {
FRAME_V0, FRAME_T0, FRAME_T1, FRAME_T2,
FRAME_T3, FRAME_T4, FRAME_T5, FRAME_T6,
FRAME_T7, FRAME_S0, FRAME_S1, FRAME_S2,
FRAME_S3, FRAME_S4, FRAME_S5, FRAME_S6,
FRAME_A0, FRAME_A1, FRAME_A2, FRAME_A3,
FRAME_A4, FRAME_A5, FRAME_T8, FRAME_T9,
FRAME_T10, FRAME_T11, FRAME_RA, FRAME_T12,
-1, FRAME_GP, FRAME_SP, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
-1, -1, -1, -1,
FRAME_PC
};
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
@ -84,6 +134,29 @@ 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 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 <= ALPHA_PC_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 = {
@ -95,6 +168,16 @@ static const struct frame_unwind kgdb_trgt_trapframe_unwind = {
const struct frame_unwind *
kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
{
char *pname;
CORE_ADDR pc;
return (NULL);
pc = frame_func_unwind(next_frame);
pname = NULL;
find_pc_partial_function(pc, &pname, NULL, NULL);
if (pname == NULL)
return (NULL);
if (strncmp(pname, "Xent", 4) == 0)
return (&kgdb_trgt_trapframe_unwind);
/* printf("%s: %lx =%s\n", __func__, pc, pname); */
return (NULL);
}