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lkcd_x86_trace.c
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/*
* Copyright 1999 Silicon Graphics, Inc. All rights reserved.
*/
/*
* lkcd_x86_trace.c
*
* Copyright (C) 2002-2012, 2017 David Anderson
* Copyright (C) 2002-2012, 2017 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Adapted as noted from the following LKCD files:
*
* lkcdutils-4.1/lcrash/arch/i386/lib/dis.c
* lkcdutils-4.1/lcrash/arch/i386/lib/trace.c
* lkcdutils-4.1/libutil/kl_queue.c
*/
#ifdef X86
#ifdef REDHAT
#include "lkcd_x86_trace.h"
#undef XEN_HYPER_MODE
static int XEN_HYPER_MODE(void) { return (pc->flags & XEN_HYPER) != 0; }
static void *kl_alloc_block(int, int);
static void kl_free_block(void *);
static void GET_BLOCK(kaddr_t, unsigned, void *);
static void kl_get_kaddr(kaddr_t, void *);
static char *kl_funcname(kaddr_t);
static kaddr_t kl_funcaddr(kaddr_t);
static syment_t *kl_lkup_symaddr(kaddr_t);
static k_error_t kl_get_task_struct(kaddr_t, int, void *);
static kaddr_t kl_kernelstack(kaddr_t);
static kaddr_t get_call_pc(kaddr_t);
static int get_jmp_instr(kaddr_t, kaddr_t, kaddr_t *, char *, char **);
static int is_push(unsigned int);
static int is_pop(unsigned int);
static int get_framesize(kaddr_t, struct bt_info *);
static int cache_framesize(int, kaddr_t funcaddr, int *, void **);
struct framesize_cache;
static int framesize_modify(struct framesize_cache *);
struct framesize_mods;
static int compiler_matches(struct framesize_mods *);
static sframe_t *alloc_sframe(trace_t *, int);
static void free_sframes(trace_t *);
static void free_trace_rec(trace_t *);
static void clean_trace_rec(trace_t *);
static int setup_trace_rec(kaddr_t, kaddr_t, int, trace_t *);
static int valid_ra(kaddr_t);
static int valid_ra_function(kaddr_t, char *);
static int eframe_incr(kaddr_t, char *);
static int find_trace(kaddr_t, kaddr_t, kaddr_t, kaddr_t, trace_t *, int);
static void dump_stack_frame(trace_t *, sframe_t *, FILE *);
static void print_trace(trace_t *, int, FILE *);
static int eframe_type(uaddr_t *);
static char *funcname_display(char *, ulong, struct bt_info *, char *);
static void print_eframe(FILE *, uaddr_t *);
static void trace_banner(FILE *);
static void print_kaddr(kaddr_t, FILE *, int);
int do_text_list(kaddr_t, int, FILE *);
int print_traces(struct bt_info *, int, int, FILE *);
static int get_instr_info(kaddr_t, instr_rec_t *);
static instr_rec_t *get_instr_stream(kaddr_t, int, int);
static void free_instr_stream(instr_rec_t *);
static trace_t *alloc_trace_rec(int);
static void kl_enqueue(element_t**, element_t*);
static element_t *kl_dequeue(element_t**);
static void handle_trace_error(struct bt_info *, int, FILE *);
static int verify_back_trace(struct bt_info *);
static int recoverable(struct bt_info *, FILE *);
static void fill_instr_cache(kaddr_t, char *);
static void do_bt_reference_check(struct bt_info *, sframe_t *);
static void print_stack_entry(struct bt_info *, int, ulong, ulong, char *,
sframe_t *, FILE *);
static struct syment *eframe_label(char *, ulong);
static int dump_framesize_cache(FILE *, struct framesize_cache *);
static int modify_framesize_cache_entry(FILE *, ulong, int);
static int framesize_debug(struct bt_info *, FILE *);
static int kernel_entry_from_user_space(sframe_t *, struct bt_info *);
k_error_t klib_error = 0;
static void *
kl_alloc_block(int size, int flags)
{
return ((void *)GETBUF(size));
}
static void
kl_free_block(void *blk)
{
if (blk)
FREEBUF(blk);
}
static void
GET_BLOCK(kaddr_t addr, unsigned size, void *buffer)
{
KL_ERROR = 0;
if (!readmem(addr, KVADDR, (void *)buffer, (ulong)size,
"GET_BLOCK", RETURN_ON_ERROR|QUIET)) {
console("GET_BLOCK: %lx (%d/0x%x)\n", addr, size, size);
KL_ERROR = KLE_INVALID_READ;
}
}
static void
kl_get_kaddr(kaddr_t addr, void *bp)
{
KL_ERROR = 0;
GET_BLOCK(addr, 4, bp);
}
static char *
kl_funcname(kaddr_t pc)
{
struct syment *sp;
char *buf, *name;
struct load_module *lm;
if ((sp = value_search(pc, NULL))) {
if (STREQ(sp->name, "_stext") &&
(sp->value == (sp+1)->value))
sp++;
switch (sp->type)
{
case 'r':
if (strstr(sp->name, "_interrupt") ||
STREQ(sp->name, "call_do_IRQ"))
return sp->name;
break;
case 't':
case 'T':
return sp->name;
}
if (is_kernel_text(pc))
return sp->name;
}
if (IS_MODULE_VADDR(pc)) {
buf = GETBUF(BUFSIZE);
name = &buf[BUFSIZE/2];
if (module_symbol(pc, NULL, NULL, buf, output_radix)) {
sprintf(name, "(%s)", buf);
return name;
} else {
FREEBUF(buf);
return "(unknown module)";
}
}
if ((lm = init_module_function(pc)))
return ("init_module");
return NULL;
}
static kaddr_t
kl_funcaddr(kaddr_t pc)
{
struct syment *sp;
struct load_module *lm;
if ((sp = value_search(pc, NULL))) {
switch (sp->type)
{
case 'r':
if (strstr(sp->name, "_interrupt") ||
STREQ(sp->name, "call_do_IRQ"))
return sp->value;
break;
case 't':
case 'T':
return sp->value;
}
if (is_kernel_text(pc))
return sp->value;
}
if ((lm = init_module_function(pc)))
return lm->mod_init_module_ptr;
return((kaddr_t)NULL);
}
static struct syment init_module_syment = {
.name = "init_module",
.type = 't',
};
static syment_t *
kl_lkup_symaddr(kaddr_t addr)
{
struct syment *sp;
struct load_module *lm;
if ((sp = value_search(addr, NULL)))
return sp;
if ((lm = init_module_function(addr))) {
init_module_syment.value = lm->mod_init_module_ptr;
return &init_module_syment;
}
return NULL;
}
static k_error_t
kl_get_task_struct(kaddr_t value, int mode, void *tsp)
{
KL_ERROR = 0;
if (value == tt->last_task_read)
BCOPY(tt->task_struct, tsp, TASK_STRUCT_SZ);
else
GET_BLOCK(value, TASK_STRUCT_SZ, tsp);
return KL_ERROR;
}
static kaddr_t
kl_kernelstack(kaddr_t task)
{
kaddr_t saddr;
return (saddr = (task + KSTACK_SIZE));
}
static void
print_kaddr(kaddr_t kaddr, FILE *ofp, int flag)
{
fprintf(ofp, "%lx", (ulong)kaddr);
}
#endif /* REDHAT */
/*
* lkcdutils-4.1/lcrash/arch/i386/lib/trace.c
*/
#ifndef REDHAT
/*
* Copyright 1999 Silicon Graphics, Inc. All rights reserved.
*/
#include <lcrash.h>
#include <asm/lc_dis.h>
#include <strings.h>
#endif /* !REDHAT */
/*
* get_call_pc()
*/
kaddr_t
get_call_pc(kaddr_t ra)
{
kaddr_t addr = 0;
instr_rec_t *irp;
if (!(irp = get_instr_stream(ra, 1, 0))) {
return((kaddr_t)NULL);
}
if (!irp->prev) {
free_instr_stream(irp);
return((kaddr_t)NULL);
}
if ((irp->prev->opcode == 0x00e8) || (irp->prev->opcode == 0xff02)) {
addr = irp->prev->addr;
}
free_instr_stream(irp);
return(addr);
}
/*
* get_jmp_instr()
*/
int
get_jmp_instr(kaddr_t addr, kaddr_t isp, kaddr_t *caddr, char *fname,
char **cfname)
{
kaddr_t a;
int offset;
instr_rec_t *irp;
if (!(irp = get_instr_stream(addr, 1, 0))) {
return(1);
}
if (!irp->prev) {
free_instr_stream(irp);
return(1);
}
irp = irp->prev;
if (!(irp->opcode == 0x00e8) && !(irp->opcode == 0xff02)) {
free_instr_stream(irp);
return(1);
}
/* Check for the easiest case first...
*/
if (irp->opcode == 0xe8) {
a = irp->operand[0].op_addr;
if ((*cfname = kl_funcname(a))) {
*caddr = a;
}
} else if (irp->opcode == 0xff02) {
switch (irp->modrm) {
case 0x14:
if (irp->sib == 0x85) {
kl_get_kaddr(addr - 4, &a);
if (KL_ERROR) {
free_instr_stream(irp);
return(1);
}
if (strstr(fname, "system_call")) {
GET_BLOCK(isp + 28, 4, &offset);
a += (offset * 4);
kl_get_kaddr(a, &a);
if ((*cfname =
kl_funcname(a))) {
*caddr = a;
}
}
}
break;
case 0xc2: /* EAX */
case 0xca: /* ECX */
case 0xd2: /* EDX */
case 0xda: /* EBX */
case 0xea: /* EBP */
case 0xf2: /* ESI */
case 0xfa: /* EDI */
break;
}
}
free_instr_stream(irp);
return(0);
}
/*
* is_push()
*/
int
is_push(unsigned int opcode)
{
switch(opcode) {
case 0x0006:
case 0x000e:
case 0x0016:
case 0x001e:
case 0x0050:
case 0x0051:
case 0x0052:
case 0x0053:
case 0x0054:
case 0x0055:
case 0x0056:
case 0x0057:
case 0x0068:
case 0x006a:
case 0x009c:
case 0x0fa0:
case 0x0fa8:
case 0xff06:
return(1);
case 0x0060:
return(2);
}
return(0);
}
/*
* is_pop()
*/
int
is_pop(unsigned int opcode)
{
switch(opcode) {
case 0x0007:
case 0x0017:
case 0x001f:
case 0x0058:
case 0x0059:
case 0x005a:
case 0x005b:
case 0x005c:
case 0x005d:
case 0x005e:
case 0x005f:
case 0x008f:
case 0x009d:
case 0x0fa1:
case 0x0fa9:
return(1);
case 0x0061:
return(2);
}
return(0);
}
#ifdef REDHAT
#define FRAMESIZE_VALIDATE (0x1)
struct framesize_cache {
kaddr_t pc;
int flags;
int frmsize;
int bp_adjust;
};
#define FRAMESIZE_CACHE (200)
static struct framesize_cache framesize_cache[FRAMESIZE_CACHE] = {{0}};
static struct framesize_cache framesize_cache_empty = {0};
#define FSZ_QUERY (1)
#define FSZ_VALIDATE (2)
#define FSZ_ENTER (3)
#define FRAMESIZE_CACHE_QUERY(pc,szp) cache_framesize(FSZ_QUERY, pc, szp, NULL)
#define FRAMESIZE_CACHE_ENTER(pc,szp) cache_framesize(FSZ_ENTER, pc, szp, NULL)
#define FRAMESIZE_CACHE_VALIDATE(pc,fcpp) cache_framesize(FSZ_VALIDATE, pc, NULL, fcpp)
static int
cache_framesize(int cmd, kaddr_t funcaddr, int *fsize, void **ptr)
{
int i;
static ulong last_cleared = 0;
retry:
for (i = 0; i < FRAMESIZE_CACHE; i++) {
if (framesize_cache[i].pc == funcaddr) {
switch (cmd)
{
case FSZ_VALIDATE:
*ptr = &framesize_cache[i];
return TRUE;
case FSZ_QUERY:
*fsize = framesize_cache[i].frmsize;
return TRUE;
case FSZ_ENTER:
*fsize = framesize_cache[i].frmsize;
return TRUE;
}
}
/*
* The entry does not exist.
*
* If FSZ_QUERY or FSZ_VALIDATE, return their
* no-such-entry indications.
*
* Otherwise, load up the entry with the new data, and
* and modify it with known kludgery.
*/
if (framesize_cache[i].pc == 0) {
switch (cmd)
{
case FSZ_QUERY:
return FALSE;
case FSZ_VALIDATE:
*ptr = &framesize_cache_empty;
return FALSE;
case FSZ_ENTER:
framesize_cache[i].pc = funcaddr;
framesize_cache[i].frmsize = *fsize;
framesize_cache[i].bp_adjust = 0;
framesize_modify(&framesize_cache[i]);
*fsize = framesize_cache[i].frmsize;
return TRUE;
}
}
}
console("framesize_cache is full\n");
/*
* No place to put it, or it doesn't exist.
*/
switch (cmd)
{
case FSZ_VALIDATE:
*ptr = &framesize_cache_empty;
return FALSE;
case FSZ_QUERY:
return FALSE;
case FSZ_ENTER:
BZERO(&framesize_cache[last_cleared % FRAMESIZE_CACHE],
sizeof(struct framesize_cache));
last_cleared++;
goto retry;
}
return FALSE; /* can't get here -- for compiler happiness */
}
/*
* More kludgery for compiler oddities.
*/
#define COMPILER_VERSION_MASK (1) /* deprecated -- usable up to 3.3.3 */
#define COMPILER_VERSION_EQUAL (2)
#define COMPILER_VERSION_START (3)
#define COMPILER_VERSION_RANGE (4)
struct framesize_mods {
char *funcname;
char *called_function;
ulong compiler_flag;
ulong compiler1;
ulong compiler2;
int pre_adjust;
int post_adjust;
} framesize_mods[] = {
{ "do_select", "schedule_timeout",
COMPILER_VERSION_START, GCC(3,3,2), 0, 0, 0 },
{ "svc_recv", "schedule_timeout",
COMPILER_VERSION_START, GCC(3,3,2), 0, 0, 0 },
{ "__down_interruptible", "schedule",
COMPILER_VERSION_START, GCC(3,3,2), 0, 0, 0 },
{ "netconsole_netdump", NULL,
COMPILER_VERSION_START, GCC(3,3,2), 0, 0, -28 },
{ "generic_file_write", NULL,
COMPILER_VERSION_EQUAL, GCC(2,96,0), 0, 0, 20 },
{ "block_prepare_write", NULL,
COMPILER_VERSION_EQUAL, GCC(2,96,0), 0, 0, 72 },
{ "receive_chars", NULL,
COMPILER_VERSION_EQUAL, GCC(2,96,0), 0, 0, 48 },
{ "default_idle", NULL,
COMPILER_VERSION_START, GCC(2,96,0), 0, -4, 0 },
{ "hidinput_hid_event", NULL,
COMPILER_VERSION_START, GCC(4,1,2), 0, 0, 28 },
{ NULL, NULL, 0, 0, 0, 0, 0 },
};
static int
framesize_modify(struct framesize_cache *fc)
{
char *funcname;
struct framesize_mods *fmp;
if (!(funcname = kl_funcname(fc->pc)))
return FALSE;
if (fc->frmsize < 0) {
if (CRASHDEBUG(1))
error(INFO,
"bogus framesize: %d for pc: %lx (%s)\n",
fc->frmsize, fc->pc, funcname);
fc->frmsize = 0;
}
for (fmp = &framesize_mods[0]; fmp->funcname; fmp++) {
if (STREQ(funcname, fmp->funcname) &&
compiler_matches(fmp))
break;
}
if (!fmp->funcname)
return FALSE;
if (fmp->pre_adjust)
fc->frmsize += fmp->pre_adjust;
if (fmp->post_adjust)
fc->bp_adjust = fmp->post_adjust;
if (fmp->called_function) {
if (STREQ(fmp->called_function,x86_function_called_by(fc->pc)))
fc->flags |= FRAMESIZE_VALIDATE;
}
return TRUE;
}
static int
compiler_matches(struct framesize_mods *fmp)
{
switch (fmp->compiler_flag)
{
case COMPILER_VERSION_MASK:
if (fmp->compiler1 & (kt->flags & GCC_VERSION_DEPRECATED))
return TRUE;
break;
case COMPILER_VERSION_EQUAL:
if (THIS_GCC_VERSION == fmp->compiler1)
return TRUE;
break;
case COMPILER_VERSION_START:
if (THIS_GCC_VERSION >= fmp->compiler1)
return TRUE;
break;
case COMPILER_VERSION_RANGE:
if ((THIS_GCC_VERSION >= fmp->compiler1) &&
(THIS_GCC_VERSION <= fmp->compiler2))
return TRUE;
break;
}
return FALSE;
}
static int
dump_framesize_cache(FILE *ofp, struct framesize_cache *fcp)
{
int i, count;
struct syment *sp, *spm;
ulong offset;
int once;
for (i = once = count = 0; i < FRAMESIZE_CACHE; i++) {
if (framesize_cache[i].pc == 0)
break;
count++;
if (fcp && (fcp != &framesize_cache[i]))
continue;
if (!once) {
fprintf(ofp,
"RET ADDR FSZ BPA V FUNCTION\n");
once++;
}
fprintf(ofp, "%8x %4d %4d %s ",
framesize_cache[i].pc,
framesize_cache[i].frmsize,
framesize_cache[i].bp_adjust,
framesize_cache[i].flags & FRAMESIZE_VALIDATE ?
"V" : "-");
if ((sp = value_search(framesize_cache[i].pc, &offset)) ||
(spm = kl_lkup_symaddr(framesize_cache[i].pc))) {
if (sp)
fprintf(ofp, "(%s+", sp->name);
else {
fprintf(ofp, "(%s+", spm->name);
offset = framesize_cache[i].pc - spm->value;
}
switch (pc->output_radix)
{
case 10:
fprintf(ofp, "%ld)", offset);
break;
default:
case 16:
fprintf(ofp, "%lx)", offset);
break;
}
}
fprintf(ofp, "\n");
if (fcp)
return 0;
}
if (!count)
fprintf(ofp, "framesize cache emtpy\n");
if (kt->flags & RA_SEEK)
fprintf(ofp, "RA_SEEK: ON\n");
if (kt->flags & NO_RA_SEEK)
fprintf(ofp, "NO_RA_SEEK: ON\n");
return count;
}
static int
modify_framesize_cache_entry(FILE *ofp, ulong eip, int framesize)
{
int i, found, all_cleared;
for (i = found = all_cleared = 0; i < FRAMESIZE_CACHE; i++) {
if (!eip) {
switch (framesize)
{
case -1:
framesize_cache[i].flags |= FRAMESIZE_VALIDATE;
break;
case -2:
framesize_cache[i].flags &= ~FRAMESIZE_VALIDATE;
break;
default:
framesize_cache[i].pc = 0;
framesize_cache[i].frmsize = 0;
framesize_cache[i].flags = 0;
all_cleared = TRUE;
break;
}
continue;
}
if (framesize_cache[i].pc == 0)
break;
if (framesize_cache[i].pc == eip) {
found++;
switch (framesize)
{
case -1:
framesize_cache[i].flags |= FRAMESIZE_VALIDATE;
break;
case -2:
framesize_cache[i].flags &= ~FRAMESIZE_VALIDATE;
break;
default:
framesize_cache[i].frmsize = framesize;
break;
}
dump_framesize_cache(ofp, &framesize_cache[i]);
return TRUE;
}
}
if (eip && !found)
fprintf(ofp, "eip: %lx not found in framesize cache\n", eip);
if (all_cleared)
fprintf(ofp, "framesize cache cleared\n");
return FALSE;
}
/*
* If eip, look for it and replace its frmsize with the passed-in value.
* If no eip, frmsize of zero means clear the cache, non-zero displays it.
*/
static int
framesize_debug(struct bt_info *bt, FILE *ofp)
{
ulong eip;
int frmsize;
eip = bt->hp->eip;
frmsize = (int)bt->hp->esp;
if (!eip) {
switch (frmsize)
{
case 0:
case -1:
case -2:
return modify_framesize_cache_entry(ofp, 0, frmsize);
default:
return dump_framesize_cache(ofp, NULL);
}
}
return modify_framesize_cache_entry(ofp, eip, frmsize);
}
#endif /* REDHAT */
/*
#define FRMSIZE_DBG 1
#define FRMSIZE2_DBG 1
*/
/*
* get_framesize()
*/
int
#ifdef REDHAT
get_framesize(kaddr_t pc, struct bt_info *bt)
#else
get_framesize(kaddr_t pc)
#endif
{
int size, ret, frmsize = 0;
kaddr_t addr;
instr_rec_t irp;
syment_t *sp;
#ifdef REDHAT
int check_IRQ_stack_switch = 0;
syment_t *jmpsp, *trampsp;
ulong offset;
int frmsize_restore = 0;
int last_add = 0;
if (FRAMESIZE_CACHE_QUERY(pc, &frmsize))
return frmsize;
frmsize = 0;
#endif
if (!(sp = kl_lkup_symaddr(pc))) {
return(0);
}
#ifdef REDHAT
if (STREQ(sp->name, "do_IRQ") && (tt->flags & IRQSTACKS))
check_IRQ_stack_switch++;
if (STREQ(sp->name, "stext_lock") || STRNEQ(sp->name, ".text.lock.")) {
jmpsp = x86_text_lock_jmp(pc, &offset);
if (jmpsp) {
console("get_framesize: stext_lock %lx => %s\n",
pc, jmpsp->name);
pc = jmpsp->value + offset;
sp = jmpsp;
}
}
if ((trampsp = x86_is_entry_tramp_address(pc, &offset))) {
if (STREQ(sp->name, "system_call"))
return 0;
pc = trampsp->value + offset;
}
#endif
#ifdef FRMSIZE_DBG
fprintf(stderr, "get_framesize(): pc=0x%x (0x%x:%s)\n",
pc, sp->s_addr, sp->s_name);
#endif
addr = sp->s_addr;
while (addr <= pc) {
bzero(&irp, sizeof(irp));
irp.aflag = 1;
irp.dflag = 1;
if (!(size = get_instr_info(addr, &irp))) {
fprintf(stderr, "ZERO SIZE!!\n");
return(-1);
}
if (size != irp.size) {
fprintf(stderr, "SIZE DOES NOT MATCH!!\n");
}
#ifdef REDHAT
/*
* Account for do_IRQ() stack switch.
*/
if (check_IRQ_stack_switch && (irp.opcode == 0xff02) &&
(irp.operand[0].op_reg == 0x7))
break;
/*
* Account for embedded "ret" instructions screwing up
* the frame size calculation.
*/
if (irp.opcode == 0xc3) {
frmsize += frmsize_restore;
frmsize_restore = 0;
last_add = FALSE;
} else if ((irp.opcode == 0x8300) &&
(irp.operand[0].op_reg == R_eSP)) {
frmsize_restore += irp.operand[1].op_addr;
last_add = TRUE;
} else if ((irp.opcode == 0x8100) &&
(irp.operand[0].op_reg == R_eSP)) {
frmsize_restore += irp.operand[1].op_addr;
last_add = TRUE;
} else if ((ret = is_pop(irp.opcode))) {
if (ret == 2)
frmsize_restore += (8 * 4);
else
frmsize_restore += 4;
last_add = FALSE;
} else {
if (last_add)
last_add = FALSE;
else
frmsize_restore = 0;
}
#endif /* REDHAT */
#ifdef REDHAT
if ((irp.opcode == 0x8300) || (irp.opcode == 0x8100)) {
#else
if (irp.opcode == 0x8300) {
#endif
/* e.g., addl $0x8,%esp */
if (irp.operand[0].op_reg == R_eSP) {
frmsize -= irp.operand[1].op_addr;
#ifdef FRMSIZE_DBG
fprintf(stderr, " addl --> 0x%x: -%d\n",
addr, irp.operand[1].op_addr);
#endif
}
} else if ((irp.opcode == 0x8305) || (irp.opcode == 0x8105)) {
/* e.g., subl $0x40,%esp */
if (irp.operand[0].op_reg == R_eSP) {
frmsize += irp.operand[1].op_addr;
#ifdef FRMSIZE_DBG
fprintf(stderr, " subl --> 0x%x: +%d\n",
addr, irp.operand[1].op_addr);
#endif
}
} else if ((ret = is_push(irp.opcode))) {
if (ret == 2) {
frmsize += (8 * 4);
#ifdef FRMSIZE_DBG
fprintf(stderr, " pusha --> 0x%x: +%d\n",
addr, (8 * 4));
#endif
} else {
frmsize += 4;
#ifdef FRMSIZE_DBG
fprintf(stderr, " pushl --> 0x%x: +%d\n" ,
addr, 4);
#endif
}
} else if ((ret = is_pop(irp.opcode))) {
if (ret == 2) {
frmsize -= (8 * 4);
#ifdef FRMSIZE_DBG
fprintf(stderr, " popa --> 0x%x: -%d\n",
addr, (8 * 4));
#endif
} else {
frmsize -= 4;
#ifdef FRMSIZE_DBG
fprintf(stderr, " popl --> 0x%x: -%d\n",
addr, 4);
#endif
}
#ifdef FRMSIZE2_DBG
} else {
fprintf(stderr, " 0x%x: opcode=0x%x\n",
addr, irp.opcode);
#endif
}
addr += size;
}
#ifdef REDHAT
/*
* Account for fact that schedule may not "call" anybody, plus
* the difference between gcc 3.2 and earlier compilers.
*/
if (STREQ(kl_funcname(pc), "schedule") &&
!(bt->flags & BT_CONTEXT_SWITCH))
frmsize -= THIS_GCC_VERSION == GCC(3,2,0) ? 4 : 8;
FRAMESIZE_CACHE_ENTER(pc, &frmsize);
#endif
return(frmsize);
}
#ifndef REDHAT
/*
* print_pc()
*/
void
print_pc(kaddr_t addr, FILE *ofp)
{
int offset = 0;
syment_t *sp;
if ((sp = kl_lkup_symaddr(addr))) {
offset = addr - sp->s_addr;
}
/* Print out address
*/
fprintf(ofp, "0x%x", addr);
/* Print out symbol name
*/
if (sp) {
if (offset) {
fprintf(ofp, " <%s+%d>", sp->s_name, offset);
} else {
fprintf(ofp, " <%s>", sp->s_name);
}
}
}
#endif /* !REDHAT */
/*
* alloc_sframe() -- Allocate a stack frame record
*/
sframe_t *
alloc_sframe(trace_t *trace, int flags)
{
sframe_t *f;
if (flags & C_PERM) {
f = (sframe_t *)kl_alloc_block(sizeof(sframe_t), K_PERM);
} else {
f = (sframe_t *)kl_alloc_block(sizeof(sframe_t), K_TEMP);
}
if (!f) {
return((sframe_t *)NULL);
}
f->level = trace->nframes;