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authorAnanth N Mavinakayanahalli <ananth@in.ibm.com>2006-10-02 13:17:31 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-02 18:57:16 +0400
commitb3f827cb0fe0660c2eacea2c2f9bdb1f225ff768 (patch)
treeae912b3b929526184eeca0519550635dc39b5362
parent412998cf6bce78b8dc5f68660e09bf3b4fcbb210 (diff)
downloadlinux-b3f827cb0fe0660c2eacea2c2f9bdb1f225ff768.tar.xz
[PATCH] Add regs_return_value() helper
Add the regs_return_value() macro to extract the return value in an architecture agnostic manner, given the pt_regs. Other architecture maintainers may want to add similar helpers. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--include/asm-i386/ptrace.h3
-rw-r--r--include/asm-ia64/ptrace.h3
-rw-r--r--include/asm-powerpc/ptrace.h2
-rw-r--r--include/asm-s390/ptrace.h1
-rw-r--r--include/asm-x86_64/ptrace.h2
5 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-i386/ptrace.h b/include/asm-i386/ptrace.h
index a4a0e5207db5..d505f501077a 100644
--- a/include/asm-i386/ptrace.h
+++ b/include/asm-i386/ptrace.h
@@ -47,7 +47,10 @@ static inline int user_mode_vm(struct pt_regs *regs)
{
return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
}
+
#define instruction_pointer(regs) ((regs)->eip)
+#define regs_return_value(regs) ((regs)->eax)
+
extern unsigned long profile_pc(struct pt_regs *regs);
#endif /* __KERNEL__ */
diff --git a/include/asm-ia64/ptrace.h b/include/asm-ia64/ptrace.h
index 1414316efd40..f4ef87a36236 100644
--- a/include/asm-ia64/ptrace.h
+++ b/include/asm-ia64/ptrace.h
@@ -241,6 +241,9 @@ struct switch_stack {
* the canonical representation by adding to instruction pointer.
*/
# define instruction_pointer(regs) ((regs)->cr_iip + ia64_psr(regs)->ri)
+
+#define regs_return_value(regs) ((regs)->r8)
+
/* Conserve space in histogram by encoding slot bits in address
* bits 2 and 3 rather than bits 0 and 1.
*/
diff --git a/include/asm-powerpc/ptrace.h b/include/asm-powerpc/ptrace.h
index 4435efe85d0e..4ad77a13f865 100644
--- a/include/asm-powerpc/ptrace.h
+++ b/include/asm-powerpc/ptrace.h
@@ -73,6 +73,8 @@ struct pt_regs {
#ifndef __ASSEMBLY__
#define instruction_pointer(regs) ((regs)->nip)
+#define regs_return_value(regs) ((regs)->gpr[3])
+
#ifdef CONFIG_SMP
extern unsigned long profile_pc(struct pt_regs *regs);
#else
diff --git a/include/asm-s390/ptrace.h b/include/asm-s390/ptrace.h
index 8d2bf65b0b64..7b768c5c68a8 100644
--- a/include/asm-s390/ptrace.h
+++ b/include/asm-s390/ptrace.h
@@ -472,6 +472,7 @@ struct user_regs_struct
#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
+#define regs_return_value(regs)((regs)->gprs[2])
#define profile_pc(regs) instruction_pointer(regs)
extern void show_regs(struct pt_regs * regs);
#endif
diff --git a/include/asm-x86_64/ptrace.h b/include/asm-x86_64/ptrace.h
index ab827dc381d7..5ea84dbb1e9c 100644
--- a/include/asm-x86_64/ptrace.h
+++ b/include/asm-x86_64/ptrace.h
@@ -39,6 +39,8 @@ struct pt_regs {
#define user_mode(regs) (!!((regs)->cs & 3))
#define user_mode_vm(regs) user_mode(regs)
#define instruction_pointer(regs) ((regs)->rip)
+#define regs_return_value(regs) ((regs)->rax)
+
extern unsigned long profile_pc(struct pt_regs *regs);
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);