x86: fix sigcontext.h user export
Jakub Jelinek reported that some user-space code that relies on
kernel headers has built dependency on the sigcontext->eip/rip
register names - which have been unified in commit:
commit 742fa54a62be6a263df14a553bf832724471dfbe
Author: H. Peter Anvin <hpa@zytor.com>
Date: Wed Jan 30 13:30:56 2008 +0100
x86: use generic register names in struct sigcontext
so give the old layout to user-space. This is not particularly
pretty, but it's an ABI so there's no danger of the two definitions
getting out of sync.
Reported-by: Jakub Jelinek <jakub@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/sigcontext.h b/include/asm-x86/sigcontext.h
index 681dead..d743947 100644
--- a/include/asm-x86/sigcontext.h
+++ b/include/asm-x86/sigcontext.h
@@ -58,6 +58,7 @@
#define X86_FXSR_MAGIC 0x0000
+#ifdef __KERNEL__
struct sigcontext {
unsigned short gs, __gsh;
unsigned short fs, __fsh;
@@ -82,6 +83,35 @@
unsigned long oldmask;
unsigned long cr2;
};
+#else /* __KERNEL__ */
+/*
+ * User-space might still rely on the old definition:
+ */
+struct sigcontext {
+ unsigned short gs, __gsh;
+ unsigned short fs, __fsh;
+ unsigned short es, __esh;
+ unsigned short ds, __dsh;
+ unsigned long edi;
+ unsigned long esi;
+ unsigned long ebp;
+ unsigned long esp;
+ unsigned long ebx;
+ unsigned long edx;
+ unsigned long ecx;
+ unsigned long eax;
+ unsigned long trapno;
+ unsigned long err;
+ unsigned long eip;
+ unsigned short cs, __csh;
+ unsigned long eflags;
+ unsigned long esp_at_signal;
+ unsigned short ss, __ssh;
+ struct _fpstate __user * fpstate;
+ unsigned long oldmask;
+ unsigned long cr2;
+};
+#endif /* !__KERNEL__ */
#else /* __i386__ */
@@ -102,6 +132,7 @@
__u32 reserved2[24];
};
+#ifdef __KERNEL__
struct sigcontext {
unsigned long r8;
unsigned long r9;
@@ -132,6 +163,41 @@
struct _fpstate __user *fpstate; /* zero when no FPU context */
unsigned long reserved1[8];
};
+#else /* __KERNEL__ */
+/*
+ * User-space might still rely on the old definition:
+ */
+struct sigcontext {
+ unsigned long r8;
+ unsigned long r9;
+ unsigned long r10;
+ unsigned long r11;
+ unsigned long r12;
+ unsigned long r13;
+ unsigned long r14;
+ unsigned long r15;
+ unsigned long rdi;
+ unsigned long rsi;
+ unsigned long rbp;
+ unsigned long rbx;
+ unsigned long rdx;
+ unsigned long rax;
+ unsigned long rcx;
+ unsigned long rsp;
+ unsigned long rip;
+ unsigned long eflags; /* RFLAGS */
+ unsigned short cs;
+ unsigned short gs;
+ unsigned short fs;
+ unsigned short __pad0;
+ unsigned long err;
+ unsigned long trapno;
+ unsigned long oldmask;
+ unsigned long cr2;
+ struct _fpstate __user *fpstate; /* zero when no FPU context */
+ unsigned long reserved1[8];
+};
+#endif /* !__KERNEL__ */
#endif /* !__i386__ */