diff options
Diffstat (limited to 'arch/um/kernel/trap.c')
| -rw-r--r-- | arch/um/kernel/trap.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 637c6505dc00..8c7b8823d1f0 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -113,6 +113,27 @@ out_of_memory: return 0; } +static void show_segv_info(struct uml_pt_regs *regs) +{ + struct task_struct *tsk = current; + struct faultinfo *fi = UPT_FAULTINFO(regs); + + if (!unhandled_signal(tsk, SIGSEGV)) + return; + + if (!printk_ratelimit()) + return; + + printk("%s%s[%d]: segfault at %lx ip %p sp %p error %x", + task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG, + tsk->comm, task_pid_nr(tsk), FAULT_ADDRESS(*fi), + (void *)UPT_IP(regs), (void *)UPT_SP(regs), + fi->error_code); + + print_vma_addr(KERN_CONT " in ", UPT_IP(regs)); + printk(KERN_CONT "\n"); +} + static void bad_segv(struct faultinfo fi, unsigned long ip) { struct siginfo si; @@ -141,6 +162,7 @@ void segv_handler(int sig, struct uml_pt_regs *regs) struct faultinfo * fi = UPT_FAULTINFO(regs); if (UPT_IS_USER(regs) && !SEGV_IS_FIXABLE(fi)) { + show_segv_info(regs); bad_segv(*fi, UPT_IP(regs)); return; } @@ -202,6 +224,8 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, address, ip); } + show_segv_info(regs); + if (err == -EACCES) { si.si_signo = SIGBUS; si.si_errno = 0; |