diff options
Diffstat (limited to 'arch/arm/kernel/signal.c')
| -rw-r--r-- | arch/arm/kernel/signal.c | 42 |
1 files changed, 11 insertions, 31 deletions
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index c0ba8afee42..e5802bfda31 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -134,17 +134,6 @@ sys_sigaction(int sig, const struct old_sigaction __user *act, #ifdef CONFIG_IWMMXT -/* iwmmxt_area is 0x98 bytes long, preceeded by 8 bytes of signature */ -#define IWMMXT_STORAGE_SIZE (0x98 + 8) -#define IWMMXT_MAGIC0 0x12ef842a -#define IWMMXT_MAGIC1 0x1c07ca71 - -struct iwmmxt_sigframe { - unsigned long magic0; - unsigned long magic1; - unsigned long storage[0x98/4]; -}; - static int preserve_iwmmxt_context(struct iwmmxt_sigframe *frame) { char kbuf[sizeof(*frame) + 8]; @@ -152,8 +141,8 @@ static int preserve_iwmmxt_context(struct iwmmxt_sigframe *frame) /* the iWMMXt context must be 64 bit aligned */ kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7); - kframe->magic0 = IWMMXT_MAGIC0; - kframe->magic1 = IWMMXT_MAGIC1; + kframe->magic = IWMMXT_MAGIC; + kframe->size = IWMMXT_STORAGE_SIZE; iwmmxt_task_copy(current_thread_info(), &kframe->storage); return __copy_to_user(frame, kframe, sizeof(*frame)); } @@ -167,8 +156,8 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame) kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7); if (__copy_from_user(kframe, frame, sizeof(*frame))) return -1; - if (kframe->magic0 != IWMMXT_MAGIC0 || - kframe->magic1 != IWMMXT_MAGIC1) + if (kframe->magic != IWMMXT_MAGIC || + kframe->size != IWMMXT_STORAGE_SIZE) return -1; iwmmxt_task_restore(current_thread_info(), &kframe->storage); return 0; @@ -177,25 +166,11 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame) #endif /* - * Auxiliary signal frame. This saves stuff like FP state. - * The layout of this structure is not part of the user ABI. - */ -struct aux_sigframe { -#ifdef CONFIG_IWMMXT - struct iwmmxt_sigframe iwmmxt; -#endif -#ifdef CONFIG_VFP - union vfp_state vfp; -#endif -}; - -/* * Do a signal return; undo the signal stack. These are aligned to 64-bit. */ struct sigframe { struct ucontext uc; unsigned long retcode[2]; - struct aux_sigframe aux __attribute__((aligned(8))); }; struct rt_sigframe { @@ -205,6 +180,7 @@ struct rt_sigframe { static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf) { + struct aux_sigframe __user *aux; sigset_t set; int err; @@ -237,9 +213,10 @@ static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf) err |= !valid_user_regs(regs); + aux = (struct aux_sigframe __user *) sf->uc.uc_regspace; #ifdef CONFIG_IWMMXT if (err == 0 && test_thread_flag(TIF_USING_IWMMXT)) - err |= restore_iwmmxt_context(&sf->aux.iwmmxt); + err |= restore_iwmmxt_context(&aux->iwmmxt); #endif #ifdef CONFIG_VFP // if (err == 0) @@ -327,6 +304,7 @@ badframe: static int setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set) { + struct aux_sigframe __user *aux; int err = 0; __put_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err); @@ -354,14 +332,16 @@ setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set) err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set)); + aux = (struct aux_sigframe __user *) sf->uc.uc_regspace; #ifdef CONFIG_IWMMXT if (err == 0 && test_thread_flag(TIF_USING_IWMMXT)) - err |= preserve_iwmmxt_context(&sf->aux.iwmmxt); + err |= preserve_iwmmxt_context(&aux->iwmmxt); #endif #ifdef CONFIG_VFP // if (err == 0) // err |= vfp_save_state(&sf->aux.vfp); #endif + __put_user_error(0, &aux->end_magic, err); return err; } |