Alexandre Julliard : ntdll: Use a custom signal restorer for Android.
Alexandre Julliard
julliard at wine.codeweavers.com
Thu Jul 17 14:05:50 CDT 2014
Module: wine
Branch: master
Commit: 1b1ea639cd66c8c3ea690afc5a346651364d36b1
URL: http://source.winehq.org/git/wine.git/?a=commit;h=1b1ea639cd66c8c3ea690afc5a346651364d36b1
Author: Alexandre Julliard <julliard at winehq.org>
Date: Thu Jul 17 14:51:12 2014 +0200
ntdll: Use a custom signal restorer for Android.
Bionic doesn't provide one, even when vdso has been unmapped by the
preloader.
---
dlls/ntdll/signal_i386.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index 5f8b8fd..7b4bc72 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -135,6 +135,12 @@ typedef struct ucontext
#define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpstate))
#define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpstate->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
+/* custom signal restorer since we may have unmapped the one in vdso, and bionic doesn't check for that */
+void rt_sigreturn(void);
+__ASM_GLOBAL_FUNC( rt_sigreturn,
+ "movl $173,%eax\n\t" /* NR_rt_sigreturn */
+ "int $0x80" );
+
#elif defined (__linux__)
typedef ucontext_t SIGCONTEXT;
@@ -2327,7 +2333,10 @@ void signal_init_process(void)
#ifdef SA_ONSTACK
sig_act.sa_flags |= SA_ONSTACK;
#endif
-
+#ifdef __ANDROID__
+ sig_act.sa_flags |= SA_RESTORER;
+ sig_act.sa_restorer = rt_sigreturn;
+#endif
sig_act.sa_sigaction = int_handler;
if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = fpe_handler;
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