Since commit 5ea2fc8 ("linux-user: Sanity check clone flags"),
trying to run fork() fails with old distro on some architectures.
This is the case with HP-PA and Debian 5 (Lenny).
It fails on:
if ((flags & CSIGNAL) != TARGET_SIGCHLD) {
return -TARGET_EINVAL;
}
because flags is 17, whereas on HP-PA, SIGCHLD is 18.
17 is the SIGCHLD value of my host (x86_64).
It appears that for TARGET_NR_fork and TARGET_NR_vfork, QEMU calls
do_fork() with SIGCHLD instead of TARGET_SIGCHLD.
Signed-off-by: Laurent Vivier <address@hidden>
---
linux-user/syscall.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index f569f82..4d85355 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7680,7 +7680,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break;
#ifdef TARGET_NR_fork
case TARGET_NR_fork:
- ret = get_errno(do_fork(cpu_env, SIGCHLD, 0, 0, 0, 0));
+ ret = get_errno(do_fork(cpu_env, TARGET_SIGCHLD, 0, 0, 0, 0));
break;
#endif
#ifdef TARGET_NR_waitpid
@@ -10490,7 +10490,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#endif
#ifdef TARGET_NR_vfork
case TARGET_NR_vfork:
- ret = get_errno(do_fork(cpu_env, CLONE_VFORK | CLONE_VM | SIGCHLD,
+ ret = get_errno(do_fork(cpu_env,
+ CLONE_VFORK | CLONE_VM | TARGET_SIGCHLD,
0, 0, 0, 0));
break;
#endif