diff options
| author | Riku Voipio <riku.voipio@linaro.org> | 2013-07-24 09:44:26 +0300 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2013-09-24 10:47:07 +0300 |
| commit | 89aaf1a6ad91c4cb3224fcca461d71dac9fa3fa6 (patch) | |
| tree | 56a1b96294cef2b7a8757757b038995f9f9927ae /linux-user | |
| parent | 1308c464a8414ce3c6f79e172255fb90b5aa313d (diff) | |
[v2] linux-user: implement m68k atomic syscalls
With nptl enabled, atomic_cmpxchg_32 and atomic_barrier
system calls are needed. This patch enabled really dummy
versions of the system calls, modeled after the m68k
kernel code.
With this patch I am able to execute m68k binaries
with qemu linux-user (busybox compiled for coldfire).
[v2] que an segfault instead of returning a EFAULT
to keep in line with kernel code.
Cc: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/strace.list | 6 | ||||
| -rw-r--r-- | linux-user/syscall.c | 28 |
2 files changed, 34 insertions, 0 deletions
diff --git a/linux-user/strace.list b/linux-user/strace.list index 4f9c364664..cf5841af60 100644 --- a/linux-user/strace.list +++ b/linux-user/strace.list @@ -1521,3 +1521,9 @@ #ifdef TARGET_NR_pipe2 { TARGET_NR_pipe2, "pipe2", NULL, NULL, NULL }, #endif +#ifdef TARGET_NR_atomic_cmpxchg_32 +{ TARGET_NR_atomic_cmpxchg_32, "atomic_cmpxchg_32", NULL, NULL, NULL }, +#endif +#ifdef TARGET_NR_atomic_barrier +{ TARGET_NR_atomic_barrier, "atomic_barrier", NULL, NULL, NULL }, +#endif diff --git a/linux-user/syscall.c b/linux-user/syscall.c index aebe36dea7..b3822b32a0 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -9133,6 +9133,34 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; } #endif +#ifdef TARGET_NR_atomic_cmpxchg_32 + case TARGET_NR_atomic_cmpxchg_32: + { + /* should use start_exclusive from main.c */ + abi_ulong mem_value; + if (get_user_u32(mem_value, arg6)) { + target_siginfo_t info; + info.si_signo = SIGSEGV; + info.si_errno = 0; + info.si_code = TARGET_SEGV_MAPERR; + info._sifields._sigfault._addr = arg6; + queue_signal((CPUArchState *)cpu_env, info.si_signo, &info); + ret = 0xdeadbeef; + + } + if (mem_value == arg2) + put_user_u32(arg1, arg6); + ret = mem_value; + break; + } +#endif +#ifdef TARGET_NR_atomic_barrier + case TARGET_NR_atomic_barrier: + { + /* Like the kernel implementation and the qemu arm barrier, no-op this? */ + break; + } +#endif default: unimplemented: gemu_log("qemu: Unsupported syscall: %d\n", num); |