/* -*- 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) { 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); }