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| author | Alex Auvolat <alex@adnab.me> | 2017-05-03 17:01:21 +0200 |
|---|---|---|
| committer | Alex Auvolat <alex@adnab.me> | 2017-05-03 17:01:21 +0200 |
| commit | 1a4eecd6a685e727611bbc1ffec696daa50bbaea (patch) | |
| tree | c75600cfdc0101e3ad25e3ef4bfcaad06296a418 /src/kernel/user | |
| parent | a959c94c1d67e234adbbb96d0d290eaf3bc26ac1 (diff) | |
| download | kogata-1a4eecd6a685e727611bbc1ffec696daa50bbaea.tar.gz kogata-1a4eecd6a685e727611bbc1ffec696daa50bbaea.zip | |
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Diffstat (limited to 'src/kernel/user')
| -rw-r--r-- | src/kernel/user/process.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/src/kernel/user/process.c b/src/kernel/user/process.c index 5c057e7..1c0f7cd 100644 --- a/src/kernel/user/process.c +++ b/src/kernel/user/process.c @@ -754,6 +754,33 @@ void dbg_dump_proc_memmap(process_t *proc) { mutex_unlock(&proc->lock); } +void dbg_proc_stacktrace(process_t *proc, uint32_t ebp, uint32_t eip) { + int i = 0; + while (true) { + char* sym = 0; + void* fn_ptr = 0; + // TODO use symbol map + + dbg_printf("| 0x%p EIP: 0x%p %s +%d\n", ebp, eip, sym, ((void*)eip - fn_ptr)); + + void *addr = (void*)ebp; + + user_region_t *r = find_user_region(proc, addr); + if (r == 0 || addr + 8 > r->addr + r->size) { + break; + } + + uint32_t *stack = (uint32_t*)addr; + ebp = stack[0]; + eip = stack[1]; + if (i++ == 20) { + dbg_printf("| ..."); + break; + } + if (eip == 0) break; + } +} + // =============================== // // USER MEMORY PAGE FAULT HANDLERS // // =============================== // @@ -770,12 +797,17 @@ void proc_usermem_pf(void* p, registers_t *regs, void* addr) { if (r == 0) { dbg_printf("Segmentation fault in process %d (0x%p : not mapped) : exiting.\n", proc->pid, addr); dbg_dump_registers(regs); + dbg_dump_proc_memmap(proc); + dbg_proc_stacktrace(proc, regs->ebp, regs->eip); current_process_exit(PS_FAILURE, (addr < (void*)PAGE_SIZE ? FAIL_ZEROPTR : FAIL_SEGFAULT)); } bool wr = ((regs->err_code & PF_WRITE_BIT) != 0); if (wr && !(r->mode & MM_WRITE)) { dbg_printf("Segmentation fault in process %d (0x%p : not allowed to write) : exiting.\n", proc->pid, addr); + dbg_dump_registers(regs); + dbg_dump_proc_memmap(proc); + dbg_proc_stacktrace(proc, regs->ebp, regs->eip); current_process_exit(PS_FAILURE, (addr < (void*)PAGE_SIZE ? FAIL_ZEROPTR : FAIL_SEGFAULT)); } @@ -825,4 +857,4 @@ void probe_for_write(const void* addr, size_t len) { } } -/* vim: set ts=4 sw=4 tw=0 noet :*/ +/* vim: set sts=4 ts=4 sw=4 tw=0 noet :*/ |