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linux-user: Special-case ERESTARTSYS in target_strerror() 

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>
This commit is contained in:
Peter Maydell 2016-06-06 19:58:19 +01:00 committed by Riku Voipio
parent 7dcdaeafe0
commit da2a34f7f9
1 changed files with 7 additions and 0 deletions
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7
linux-user/syscall.c
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@ -632,6 +632,13 @@ static inline int is_error(abi_long ret)
const char *target_strerror(int err) 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)) { if ((err >= ERRNO_TABLE_SIZE) || (err < 0)) {
return NULL; return NULL;
} }