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authorIngo Molnar <mingo@elte.hu>2008-10-11 20:23:20 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-11 20:23:20 +0200
commit0afe2db21394820d32646a695eccf3fbfe6ab5c7 (patch)
tree6d925383f444a242ebc77d167420efb7e6ad8d99 /arch/x86/kernel/sigframe.h
parentd84705969f898f294bc3fc32eca33580f14105bd (diff)
parent43603c8df97f246e8be7b9cc92a8f968a85108bd (diff)
Merge branch 'x86/unify-cpu-detect' into x86-v28-for-linus-phase4-D
Conflicts: arch/x86/kernel/cpu/common.c arch/x86/kernel/signal_64.c include/asm-x86/cpufeature.h
Diffstat (limited to 'arch/x86/kernel/sigframe.h')
-rw-r--r--arch/x86/kernel/sigframe.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/x86/kernel/sigframe.h b/arch/x86/kernel/sigframe.h
index 8b4956e800ac..cc673aa55ce4 100644
--- a/arch/x86/kernel/sigframe.h
+++ b/arch/x86/kernel/sigframe.h
@@ -3,9 +3,18 @@ struct sigframe {
char __user *pretcode;
int sig;
struct sigcontext sc;
- struct _fpstate fpstate;
+ /*
+ * fpstate is unused. fpstate is moved/allocated after
+ * retcode[] below. This movement allows to have the FP state and the
+ * future state extensions (xsave) stay together.
+ * And at the same time retaining the unused fpstate, prevents changing
+ * the offset of extramask[] in the sigframe and thus prevent any
+ * legacy application accessing/modifying it.
+ */
+ struct _fpstate fpstate_unused;
unsigned long extramask[_NSIG_WORDS-1];
char retcode[8];
+ /* fp state follows here */
};
struct rt_sigframe {
@@ -15,14 +24,15 @@ struct rt_sigframe {
void __user *puc;
struct siginfo info;
struct ucontext uc;
- struct _fpstate fpstate;
char retcode[8];
+ /* fp state follows here */
};
#else
struct rt_sigframe {
char __user *pretcode;
struct ucontext uc;
struct siginfo info;
+ /* fp state follows here */
};
int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,