This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-mips / stacktrace.h

diff --git a/include/asm-mips/stacktrace.h b/include/asm-mips/stacktrace.h
new file mode 100644 (file)
index 0000000..07f8733
--- /dev/null
+++ b/include/asm-mips/stacktrace.h
@@ -0,0 +1,44 @@
+#ifndef _ASM_STACKTRACE_H
+#define _ASM_STACKTRACE_H
+
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_KALLSYMS
+extern int raw_show_trace;
+extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
+                                 unsigned long pc, unsigned long *ra);
+#else
+#define raw_show_trace 1
+#define unwind_stack(task, sp, pc, ra) 0
+#endif
+
+static __always_inline void prepare_frametrace(struct pt_regs *regs)
+{
+#ifndef CONFIG_KALLSYMS
+       /*
+        * Remove any garbage that may be in regs (specially func
+        * addresses) to avoid show_raw_backtrace() to report them
+        */
+       memset(regs, 0, sizeof(*regs));
+#endif
+       __asm__ __volatile__(
+               ".set push\n\t"
+               ".set noat\n\t"
+#ifdef CONFIG_64BIT
+               "1: dla $1, 1b\n\t"
+               "sd $1, %0\n\t"
+               "sd $29, %1\n\t"
+               "sd $31, %2\n\t"
+#else
+               "1: la $1, 1b\n\t"
+               "sw $1, %0\n\t"
+               "sw $29, %1\n\t"
+               "sw $31, %2\n\t"
+#endif
+               ".set pop\n\t"
+               : "=m" (regs->cp0_epc),
+               "=m" (regs->regs[29]), "=m" (regs->regs[31])
+               : : "memory");
+}
+
+#endif /* _ASM_STACKTRACE_H */