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s390: Add pt_regs register and stack access API

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This API is needed for the kprobe-based event tracer.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
LKML-Reference: <20100212123840.GB27548@osiris.boeblingen.de.ibm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Heiko Carstens
2010-02-12 13:38:40 +01:00
committed by Frederic Weisbecker
parent f850c30c8b
commit 952974ac61
3 changed files with 71 additions and 1 deletions
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13
arch/s390/include/asm/ptrace.h
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@@ -492,13 +492,24 @@ struct user_regs_struct
struct task_struct;
extern void user_enable_single_step(struct task_struct *);
extern void user_disable_single_step(struct task_struct *);
extern void show_regs(struct pt_regs * regs);
#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
#define user_stack_pointer(regs)((regs)->gprs[15])
#define regs_return_value(regs)((regs)->gprs[2])
#define profile_pc(regs) instruction_pointer(regs)
extern void show_regs(struct pt_regs * regs);
int regs_query_register_offset(const char *name);
const char *regs_query_register_name(unsigned int offset);
unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset);
unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
{
return regs->gprs[15] & PSW_ADDR_INSN;
}
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */