From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Frysinger Date: Thu, 14 Apr 2011 06:01:31 +0000 Subject: [PATCH 1/5] asm-generic/ptrace.h: start a common low level ptrace helper Message-Id: <1302760895-13459-2-git-send-email-vapier@gentoo.org> List-Id: References: <1302760895-13459-1-git-send-email-vapier@gentoo.org> In-Reply-To: <1302760895-13459-1-git-send-email-vapier@gentoo.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Roland McGrath , Oleg Nesterov , linux-kernel@vger.kernel.org, kgdb-bugreport@lists.sourceforge.net, Jason Wessel Cc: x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , linux-sh@vger.kernel.org, Paul Mundt , Andrew Morton This implements a bunch of helper funcs for poking the registers of a ptrace structure. Now common code should be able to portably update specific registers (like kgdb updating the PC). Signed-off-by: Mike Frysinger --- include/asm-generic/ptrace.h | 74 ++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 74 insertions(+), 0 deletions(-) create mode 100644 include/asm-generic/ptrace.h diff --git a/include/asm-generic/ptrace.h b/include/asm-generic/ptrace.h new file mode 100644 index 0000000..82e674f --- /dev/null +++ b/include/asm-generic/ptrace.h @@ -0,0 +1,74 @@ +/* + * Common low level (register) ptrace helpers + * + * Copyright 2004-2011 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __ASM_GENERIC_PTRACE_H__ +#define __ASM_GENERIC_PTRACE_H__ + +#ifndef __ASSEMBLY__ + +/* Helpers for working with the instruction pointer */ +#ifndef GET_IP +#define GET_IP(regs) ((regs)->pc) +#endif +#ifndef SET_IP +#define SET_IP(regs, val) (GET_IP(regs) = (val)) +#endif + +static inline unsigned long instruction_pointer(struct pt_regs *regs) +{ + return GET_IP(regs); +} +static inline void instruction_pointer_set(struct pt_regs *regs, + unsigned long val) +{ + SET_IP(regs, val); +} + +#ifndef profile_pc +#define profile_pc(regs) instruction_pointer(regs) +#endif + +/* Helpers for working with the user stack pointer */ +#ifndef GET_USP +#define GET_USP(regs) ((regs)->usp) +#endif +#ifndef SET_USP +#define SET_USP(regs, val) (GET_USP(regs) = (val)) +#endif + +static inline unsigned long user_stack_pointer(struct pt_regs *regs) +{ + return GET_USP(regs); +} +static inline void user_stack_pointer_set(struct pt_regs *regs, + unsigned long val) +{ + SET_USP(regs, val); +} + +/* Helpers for working with the frame pointer */ +#ifndef GET_FP +#define GET_FP(regs) ((regs)->fp) +#endif +#ifndef SET_FP +#define SET_FP(regs, val) (GET_FP(regs) = (val)) +#endif + +static inline unsigned long frame_pointer(struct pt_regs *regs) +{ + return GET_FP(regs); +} +static inline void frame_pointer_set(struct pt_regs *regs, + unsigned long val) +{ + SET_FP(regs, val); +} + +#endif /* __ASSEMBLY__ */ + +#endif -- 1.7.5.rc1