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[PULL,43/44] linux-user: Special-case ERESTARTSYS in target_strerror()

Message ID da2a34f7f9999da09f6c307b40b66eba8cc38283.1465392531.git.riku.voipio@linaro.org
State Accepted
Commit da2a34f7f9999da09f6c307b40b66eba8cc38283
Headers show

Commit Message

Riku Voipio June 8, 2016, 1:30 p.m. UTC 
From: Peter Maydell <peter.maydell@linaro.org>


Since TARGET_ERESTARTSYS and TARGET_ESIGRETURN are internal-to-QEMU
error numbers, handle them specially in target_strerror(), to avoid
confusing strace output like:

9521 rt_sigreturn(14,8,274886297808,8,0,268435456) = -1 errno=513 (Unknown error 513)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>

---
 linux-user/syscall.c | 7 +++++++
 1 file changed, 7 insertions(+)

-- 
2.1.4
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Patch

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 262c645..bd8095c 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -632,6 +632,13 @@  static inline int is_error(abi_long ret)
 
 const char *target_strerror(int err)
 {
+    if (err == TARGET_ERESTARTSYS) {
+        return "To be restarted";
+    }
+    if (err == TARGET_QEMU_ESIGRETURN) {
+        return "Successful exit from sigreturn";
+    }
+
     if ((err >= ERRNO_TABLE_SIZE) || (err < 0)) {
         return NULL;
     }