[PATCH] i386: let signal handlers set the resume flag

Allow signal handlers to set the RF bit in EFLAGS.  This lets a simple
debugger using SIGTRAP skip one instruction after returning from a signal.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/i386/kernel/signal.c b/arch/i386/kernel/signal.c
index 963616d364ec48984013edb1750ce1507df4fb44..608eac4a7324d99de696b66c77a503d3165b73c5 100644 (file)
--- a/arch/i386/kernel/signal.c
+++ b/arch/i386/kernel/signal.c
@@ -123,7 +123,8 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *peax
          err |= __get_user(tmp, &sc->seg);                             \
          loadsegment(seg,tmp); }
 
-#define        FIX_EFLAGS      (X86_EFLAGS_AC | X86_EFLAGS_OF | X86_EFLAGS_DF | \
+#define        FIX_EFLAGS      (X86_EFLAGS_AC | X86_EFLAGS_RF |                 \
+                        X86_EFLAGS_OF | X86_EFLAGS_DF |                 \
                         X86_EFLAGS_TF | X86_EFLAGS_SF | X86_EFLAGS_ZF | \
                         X86_EFLAGS_AF | X86_EFLAGS_PF | X86_EFLAGS_CF)