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[MIPS] lockdep: Add STACKTRACE_SUPPORT and enable LOCKDEP_SUPPORT

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Implement stacktrace interface by using unwind_stack() and enable lockdep
support in Kconfig.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2006-09-26 23:44:01 +09:00
committed by Ralf Baechle
parent eae6c0da9d
commit 1df0f0ff7e
6 changed files with 168 additions and 34 deletions
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37
arch/mips/kernel/traps.c
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@ -41,6 +41,7 @@
#include <asm/mmu_context.h>
#include <asm/watch.h>
#include <asm/types.h>
#include <asm/stacktrace.h>
extern asmlinkage void handle_int(void);
extern asmlinkage void handle_tlbm(void);
@ -92,16 +93,14 @@ static void show_raw_backtrace(unsigned long reg29)
}
#ifdef CONFIG_KALLSYMS
static int raw_show_trace;
int raw_show_trace;
static int __init set_raw_show_trace(char *str)
{
raw_show_trace = 1;
return 1;
}
__setup("raw_show_trace", set_raw_show_trace);
extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
unsigned long pc, unsigned long ra);
#endif
static void show_backtrace(struct task_struct *task, struct pt_regs *regs)
{
@ -121,9 +120,6 @@ static void show_backtrace(struct task_struct *task, struct pt_regs *regs)
} while (pc);
printk("\n");
}
#else
#define show_backtrace(task, r) show_raw_backtrace((r)->regs[29]);
#endif
/*
* This routine abuses get_user()/put_user() to reference pointers
@ -158,28 +154,6 @@ static void show_stacktrace(struct task_struct *task, struct pt_regs *regs)
show_backtrace(task, regs);
}
static __always_inline void prepare_frametrace(struct pt_regs *regs)
{
__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");
}
void show_stack(struct task_struct *task, unsigned long *sp)
{
struct pt_regs regs;
@ -206,11 +180,6 @@ void dump_stack(void)
{
struct pt_regs regs;
/*
* Remove any garbage that may be in regs (specially func
* addresses) to avoid show_raw_backtrace() to report them
*/
memset(&regs, 0, sizeof(regs));
prepare_frametrace(&regs);
show_backtrace(current, &regs);
}