diff options
Diffstat (limited to 'runtime/stack-ppc.c')
| -rw-r--r-- | runtime/stack-ppc.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/runtime/stack-ppc.c b/runtime/stack-ppc.c new file mode 100644 index 00000000..3267194e --- /dev/null +++ b/runtime/stack-ppc.c @@ -0,0 +1,62 @@ +/* -*- linux-c -*- + * ppc64 stack tracing functions + * + * This file is part of systemtap, and is free software. You can + * redistribute it and/or modify it under the terms of the GNU General + * Public License (GPL); either version 2, or (at your option) any + * later version. + */ + +static void __stp_stack_print (struct pt_regs *regs, int verbose, int levels, + struct task_struct *tsk) +{ + unsigned long ip, newsp, lr = 0; + int count = 0; + int firstframe = 1; + unsigned long *_sp = (unsigned long *)®_SP(regs); + unsigned long sp = (unsigned long)_sp; + lr = 0; + do { + if (sp < KERNELBASE) + return; + _sp = (unsigned long *) sp; + newsp = _sp[0]; + ip = _sp[2]; + if (!firstframe || ip != lr) { + if (verbose) { + _stp_printf("[0x%016lx] [0x%016lx] ", sp, ip); + _stp_symbol_print(ip); + if (firstframe) + _stp_print(" (unreliable)"); + _stp_print_char('\n'); + } + else + _stp_printf("0x%016lx ", ip); + } + firstframe = 0; + /* + * See if this is an exception frame. + * We look for the "regshere" marker in the current frame. + */ + if ( _sp[12] == 0x7265677368657265ul) { + struct pt_regs *regs = (struct pt_regs *) + (sp + STACK_FRAME_OVERHEAD); + if (verbose) { + _stp_printf("--- Exception: %lx at ",regs->trap); + _stp_symbol_print(regs->nip); + _stp_print_char('\n'); + lr = regs->link; + _stp_print(" LR ="); + _stp_symbol_print(lr); + _stp_print_char('\n'); + firstframe = 1; + } + else { + _stp_printf("0x%016lx ",regs->nip); + _stp_printf("0x%016lx ",regs->link); + } + } + + sp = newsp; + } while (count++ < MAXBACKTRACE); +} |