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um: Add support for CONFIG_STACKTRACE

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Add stacktrace support for User Mode Linux

Signed-off-by: Daniel Walter <dwalter@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Daniel Walter
2014-08-20 10:56:00 +01:00
committed by Richard Weinberger
parent 2a2361228c
commit 970e51fead
5 changed files with 144 additions and 55 deletions
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42
arch/um/include/asm/stacktrace.h Normal file
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@@ -0,0 +1,42 @@
#ifndef _ASM_UML_STACKTRACE_H
#define _ASM_UML_STACKTRACE_H
#include <linux/uaccess.h>
#include <linux/ptrace.h>
struct stack_frame {
struct stack_frame *next_frame;
unsigned long return_address;
};
struct stacktrace_ops {
void (*address)(void *data, unsigned long address, int reliable);
};
#ifdef CONFIG_FRAME_POINTER
static inline unsigned long
get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
{
if (!task || task == current)
return segv_regs ? PT_REGS_BP(segv_regs) : current_bp();
return KSTK_EBP(task);
}
#else
static inline unsigned long
get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
{
return 0;
}
#endif
static inline unsigned long
*get_stack_pointer(struct task_struct *task, struct pt_regs *segv_regs)
{
if (!task || task == current)
return segv_regs ? (unsigned long *)PT_REGS_SP(segv_regs) : current_sp();
return (unsigned long *)KSTK_ESP(task);
}
void dump_trace(struct task_struct *tsk, const struct stacktrace_ops *ops, void *data);
#endif /* _ASM_UML_STACKTRACE_H */