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| author | Laurent Vivier <laurent@vivier.eu> | 2017-02-16 18:37:07 +0100 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2017-02-27 23:10:02 +0100 |
| commit | 7eddb5ddacb783ba325277b8f420530c2ae8a2ce (patch) | |
| tree | 528fb8cac252116ef102d19fa01714969ab6a7b3 | |
| parent | 8f2d7c341184a95d05476ea3c45dbae2b9ddbe51 (diff) | |
| download | focaccia-qemu-7eddb5ddacb783ba325277b8f420530c2ae8a2ce.tar.gz focaccia-qemu-7eddb5ddacb783ba325277b8f420530c2ae8a2ce.zip | |
linux-user: fix fork()
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 <laurent@vivier.eu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170216173707.16209-1-laurent@vivier.eu>
| -rw-r--r-- | linux-user/syscall.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index f569f827fc..4d85355dae 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 |