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/* -*- linux-c -*-
* i386 stack tracing functions
* Copyright (C) 2005-2008 Red Hat Inc.
*
* 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 inline int _stp_valid_stack_ptr(unsigned long context, unsigned long p)
{
return p > context && p < context + THREAD_SIZE - 3;
}
static void __stp_stack_print (struct pt_regs *regs, int verbose, int levels)
{
unsigned long *stack = (unsigned long *)®_SP(regs);
unsigned long context = (unsigned long)stack & ~(THREAD_SIZE - 1);
unsigned long addr;
#ifdef CONFIG_FRAME_POINTER
{
#ifdef STAPCONF_X86_UNIREGS
unsigned long ebp = regs->bp;
#else
unsigned long ebp = regs->ebp;
#endif
while (_stp_valid_stack_ptr(context, (unsigned long)ebp)) {
addr = *(unsigned long *)(ebp + 4);
if (verbose) {
_stp_print_char(' ');
_stp_symbol_print (addr);
_stp_print_char('\n');
} else
_stp_printf ("0x%08lx ", addr);
ebp = *(unsigned long *)ebp;
}
}
#else
while (_stp_valid_stack_ptr(context, (unsigned long)stack)) {
addr = *stack++;
_stp_func_print(addr, verbose, 1);
}
#endif
}
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