From 90888816ba1bf1c4eff1e7e4220c1afc802f0fd3 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sun, 27 Apr 2008 14:52:51 -0700 Subject: sparc64: Clean up handling of pt_regs trap type encoding. If we use this from more than one place, it's better to have helpers instead of twiddling magic constants all over. Add pt_regs_trap_type(), pt_regs_clear_trap_type(), and pt_regs_is_syscall(). Use them in do_signal(). Signed-off-by: David S. Miller --- include/asm-sparc64/ptrace.h | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-sparc64/ptrace.h b/include/asm-sparc64/ptrace.h index b4b951d570bb..714b81956f32 100644 --- a/include/asm-sparc64/ptrace.h +++ b/include/asm-sparc64/ptrace.h @@ -1,4 +1,3 @@ -/* $Id: ptrace.h,v 1.14 2002/02/09 19:49:32 davem Exp $ */ #ifndef _SPARC64_PTRACE_H #define _SPARC64_PTRACE_H @@ -8,10 +7,15 @@ * stack during a system call and basically all traps. */ +/* This magic value must have the low 9 bits clear, + * as that is where we encode the %tt value, see below. + */ #define PT_REGS_MAGIC 0x57ac6c00 #ifndef __ASSEMBLY__ +#include + struct pt_regs { unsigned long u_regs[16]; /* globals and ins */ unsigned long tstate; @@ -33,6 +37,23 @@ struct pt_regs { unsigned int magic; }; +static inline int pt_regs_trap_type(struct pt_regs *regs) +{ + return regs->magic & 0x1ff; +} + +static inline int pt_regs_clear_trap_type(struct pt_regs *regs) +{ + return regs->magic &= ~0x1ff; +} + +static inline bool pt_regs_is_syscall(struct pt_regs *regs) +{ + int tt = pt_regs_trap_type(regs); + + return (tt == 0x110 || tt == 0x111 || tt == 0x16d); +} + struct pt_regs32 { unsigned int psr; unsigned int pc; -- cgit v1.2.3