tile: include the syscall number in the backtrace

[cascardo/linux.git] / arch / tile / kernel / stack.c

diff --git a/arch/tile/kernel/stack.c b/arch/tile/kernel/stack.c
index 402b9c8..22bbbd3 100644 (file)
--- a/arch/tile/kernel/stack.c
+++ b/arch/tile/kernel/stack.c
@@ -78,8 +78,7 @@ static bool read_memory_func(void *result, unsigned long address,
 /* Return a pt_regs pointer for a valid fault handler frame */
 static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt)
 {
-       const char *fault = NULL;  /* happy compiler */
-       char fault_buf[64];
+       char fault[64];
        unsigned long sp = kbt->it.sp;
        struct pt_regs *p;
 
@@ -90,14 +89,14 @@ static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt)
        if (!in_kernel_stack(kbt, sp + C_ABI_SAVE_AREA_SIZE + PTREGS_SIZE-1))
                return NULL;
        p = (struct pt_regs *)(sp + C_ABI_SAVE_AREA_SIZE);
-       if (p->faultnum == INT_SWINT_1 || p->faultnum == INT_SWINT_1_SIGRETURN)
-               fault = "syscall";
-       else {
-               if (kbt->verbose) {     /* else we aren't going to use it */
-                       snprintf(fault_buf, sizeof(fault_buf),
+       if (kbt->verbose) {     /* else we aren't going to use it */
+               if (p->faultnum == INT_SWINT_1 ||
+                   p->faultnum == INT_SWINT_1_SIGRETURN)
+                       snprintf(fault, sizeof(fault),
+                                "syscall %ld", p->regs[TREG_SYSCALL_NR]);
+               else
+                       snprintf(fault, sizeof(fault),
                                 "interrupt %ld", p->faultnum);
-                       fault = fault_buf;
-               }
        }
        if (EX1_PL(p->ex1) == KERNEL_PL &&
            __kernel_text_address(p->pc) &&