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/*
* Copyright (c) 2012-2014 Richard Braun.
* Copyright (c) 2018 Agustina Arzille.
*
* 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 3 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <kern/symbol.h>
#include <machine/pmap.h>
#include <machine/strace.h>
#include <machine/types.h>
#include <vm/vm_kmem.h>
#ifdef __LP64__
#define STRACE_ADDR_FORMAT "%#018lx"
#else /* __LP64__ */
#define STRACE_ADDR_FORMAT "%#010lx"
#endif /* __LP64__ */
static void
strace_show_one(unsigned int index, uintptr_t ip)
{
const struct symbol *symbol;
uintptr_t offset;
symbol = symbol_lookup(ip);
if (!symbol) {
printf("#%02u [" STRACE_ADDR_FORMAT "]\n", index, (unsigned long)ip);
} else {
offset = ip - symbol->addr;
printf("#%02u [" STRACE_ADDR_FORMAT "] %s+%#lx/%#lx\n",
index, (unsigned long)ip, symbol->name,
(unsigned long)offset, (unsigned long)symbol->size);
}
}
void
strace_show(uintptr_t ip, uintptr_t bp)
{
phys_addr_t pa;
void **frame;
unsigned int i;
int error;
strace_show_one(0, ip);
i = 1;
frame = (void **)bp;
for (;;) {
if (frame == NULL) {
break;
}
error = pmap_kextract((uintptr_t)&frame[1], &pa);
if (error) {
printf("strace: unmapped return address at %p\n", &frame[1]);
break;
}
strace_show_one(i, (uintptr_t)frame[1]);
error = pmap_kextract((uintptr_t)frame, &pa);
if (error) {
printf("strace: unmapped frame address at %p\n", frame);
break;
}
i++;
frame = frame[0];
}
}
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