diff options
Diffstat (limited to 'arch/x86/um/signal_32.c')
| -rw-r--r-- | arch/x86/um/signal_32.c | 39 |
1 files changed, 8 insertions, 31 deletions
diff --git a/arch/x86/um/signal_32.c b/arch/x86/um/signal_32.c index 2eebdc0..7a206d8 100644 --- a/arch/x86/um/signal_32.c +++ b/arch/x86/um/signal_32.c @@ -215,8 +215,7 @@ static int copy_sc_from_user(struct pt_regs *regs, } static int copy_sc_to_user(struct sigcontext __user *to, - struct _fpstate __user *to_fp, struct pt_regs *regs, - unsigned long sp) + struct _fpstate __user *to_fp, struct pt_regs *regs) { struct sigcontext sc; struct faultinfo * fi = ¤t->thread.arch.faultinfo; @@ -230,7 +229,7 @@ static int copy_sc_to_user(struct sigcontext __user *to, sc.di = REGS_EDI(regs->regs.gp); sc.si = REGS_ESI(regs->regs.gp); sc.bp = REGS_EBP(regs->regs.gp); - sc.sp = sp; + sc.sp = REGS_SP(regs->regs.gp); sc.bx = REGS_EBX(regs->regs.gp); sc.dx = REGS_EDX(regs->regs.gp); sc.cx = REGS_ECX(regs->regs.gp); @@ -291,7 +290,7 @@ static int copy_ucontext_to_user(struct ucontext __user *uc, err |= put_user(current->sas_ss_sp, &uc->uc_stack.ss_sp); err |= put_user(sas_ss_flags(sp), &uc->uc_stack.ss_flags); err |= put_user(current->sas_ss_size, &uc->uc_stack.ss_size); - err |= copy_sc_to_user(&uc->uc_mcontext, fp, ¤t->thread.regs, sp); + err |= copy_sc_to_user(&uc->uc_mcontext, fp, ¤t->thread.regs); err |= copy_to_user(&uc->uc_sigmask, set, sizeof(*set)); return err; } @@ -324,7 +323,6 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig, { struct sigframe __user *frame; void __user *restorer; - unsigned long save_sp = PT_REGS_SP(regs); int err = 0; /* This is the same calculation as i386 - ((sp + 4) & 15) == 0 */ @@ -337,19 +335,9 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig, if (ka->sa.sa_flags & SA_RESTORER) restorer = ka->sa.sa_restorer; - /* Update SP now because the page fault handler refuses to extend - * the stack if the faulting address is too far below the current - * SP, which frame now certainly is. If there's an error, the original - * value is restored on the way out. - * When writing the sigcontext to the stack, we have to write the - * original value, so that's passed to copy_sc_to_user, which does - * the right thing with it. - */ - PT_REGS_SP(regs) = (unsigned long) frame; - err |= __put_user(restorer, &frame->pretcode); err |= __put_user(sig, &frame->sig); - err |= copy_sc_to_user(&frame->sc, NULL, regs, save_sp); + err |= copy_sc_to_user(&frame->sc, NULL, regs); err |= __put_user(mask->sig[0], &frame->sc.oldmask); if (_NSIG_WORDS > 1) err |= __copy_to_user(&frame->extramask, &mask->sig[1], @@ -367,7 +355,7 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig, err |= __put_user(0x80cd, (short __user *)(frame->retcode+6)); if (err) - goto err; + return err; PT_REGS_SP(regs) = (unsigned long) frame; PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler; @@ -378,10 +366,6 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig, if ((current->ptrace & PT_DTRACE) && (current->ptrace & PT_PTRACED)) ptrace_notify(SIGTRAP); return 0; - -err: - PT_REGS_SP(regs) = save_sp; - return err; } int setup_signal_stack_si(unsigned long stack_top, int sig, @@ -390,7 +374,6 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, { struct rt_sigframe __user *frame; void __user *restorer; - unsigned long save_sp = PT_REGS_SP(regs); int err = 0; stack_top &= -8UL; @@ -402,16 +385,13 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, if (ka->sa.sa_flags & SA_RESTORER) restorer = ka->sa.sa_restorer; - /* See comment above about why this is here */ - PT_REGS_SP(regs) = (unsigned long) frame; - err |= __put_user(restorer, &frame->pretcode); err |= __put_user(sig, &frame->sig); err |= __put_user(&frame->info, &frame->pinfo); err |= __put_user(&frame->uc, &frame->puc); err |= copy_siginfo_to_user(&frame->info, info); err |= copy_ucontext_to_user(&frame->uc, &frame->fpstate, mask, - save_sp); + PT_REGS_SP(regs)); /* * This is movl $,%eax ; int $0x80 @@ -425,8 +405,9 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, err |= __put_user(0x80cd, (short __user *)(frame->retcode+5)); if (err) - goto err; + return err; + PT_REGS_SP(regs) = (unsigned long) frame; PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler; PT_REGS_EAX(regs) = (unsigned long) sig; PT_REGS_EDX(regs) = (unsigned long) &frame->info; @@ -435,10 +416,6 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, if ((current->ptrace & PT_DTRACE) && (current->ptrace & PT_PTRACED)) ptrace_notify(SIGTRAP); return 0; - -err: - PT_REGS_SP(regs) = save_sp; - return err; } long sys_sigreturn(struct pt_regs regs) |
