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Commit 709110bd authored by Hiroshi Shimamoto's avatar Hiroshi Shimamoto Committed by Ingo Molnar
Browse files

x86: signal: cosmetic unification of restore_sigcontext() 



Impact: cleanup

Make restore_sigcontext() the same.

Signed-off-by: default avatarHiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent f8d56f17

arch/x86/kernel/signal_32.c

+22 −0
Original line number Diff line number Diff line
@@ -149,14 +149,36 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, 
	/* Always make any pending restarted system calls return -EINTR */

	current_thread_info()->restart_block.fn = do_no_restart_syscall;



#ifdef CONFIG_X86_32

	GET_SEG(gs);

	COPY_SEG(fs);

	COPY_SEG(es);

	COPY_SEG(ds);

#endif /* CONFIG_X86_32 */



	COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);

	COPY(dx); COPY(cx); COPY(ip);



#ifdef CONFIG_X86_64

	COPY(r8);

	COPY(r9);

	COPY(r10);

	COPY(r11);

	COPY(r12);

	COPY(r13);

	COPY(r14);

	COPY(r15);

#endif /* CONFIG_X86_64 */



#ifdef CONFIG_X86_32

	COPY_SEG_STRICT(cs);

	COPY_SEG_STRICT(ss);

#else /* !CONFIG_X86_32 */

	/* Kernel saves and restores only the CS segment register on signals,

	 * which is the bare minimum needed to allow mixed 32/64-bit code.

	 * App's signal handler can save/restore other segments if needed. */

	COPY_SEG_STRICT(cs);

#endif /* CONFIG_X86_32 */



	err |= __get_user(tmpflags, &sc->flags);

	regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);

arch/x86/kernel/signal_64.c

+15 −0
Original line number Diff line number Diff line
@@ -76,8 +76,17 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, 
	/* Always make any pending restarted system calls return -EINTR */

	current_thread_info()->restart_block.fn = do_no_restart_syscall;



#ifdef CONFIG_X86_32

	GET_SEG(gs);

	COPY_SEG(fs);

	COPY_SEG(es);

	COPY_SEG(ds);

#endif /* CONFIG_X86_32 */



	COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);

	COPY(dx); COPY(cx); COPY(ip);



#ifdef CONFIG_X86_64

	COPY(r8);

	COPY(r9);

	COPY(r10);
@@ -86,11 +95,17 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, 
	COPY(r13);

	COPY(r14);

	COPY(r15);

#endif /* CONFIG_X86_64 */



#ifdef CONFIG_X86_32

	COPY_SEG_STRICT(cs);

	COPY_SEG_STRICT(ss);

#else /* !CONFIG_X86_32 */

	/* Kernel saves and restores only the CS segment register on signals,

	 * which is the bare minimum needed to allow mixed 32/64-bit code.

	 * App's signal handler can save/restore other segments if needed. */

	COPY_SEG_STRICT(cs);

#endif /* CONFIG_X86_32 */



	err |= __get_user(tmpflags, &sc->flags);

	regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);