@@ -132,6 +132,16 @@ SYSCALL_DEF(open_by_handle_at, ARG_DEC, ARG_PTR, ARG_OPENFLAG);
#ifdef TARGET_NR_pause
SYSCALL_DEF(pause);
#endif
+#ifdef TARGET_NR_pipe
+# if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || \
+ defined(TARGET_SH4) || defined(TARGET_SPARC)
+/* ??? We have no way for strace to display the second returned fd. */
+SYSCALL_DEF(pipe);
+# else
+SYSCALL_DEF(pipe, ARG_PTR);
+# endif
+#endif
+SYSCALL_DEF(pipe2, ARG_PTR, ARG_OPENFLAG);
SYSCALL_DEF_FULL(pread64, .impl = impl_pread64,
.args = args_pread64_pwrite64,
.arg_type = { ARG_DEC, ARG_PTR, ARG_DEC, ARG_DEC64 });
@@ -720,6 +720,57 @@ SYSCALL_IMPL(open_by_handle_at)
return ret;
}
+static abi_long do_pipe(CPUArchState *cpu_env, abi_ulong target_fds,
+ int target_flags, bool is_pipe2)
+{
+ int host_flags = target_to_host_bitmask(target_flags, fcntl_flags_tbl);
+ int host_fds[2];
+ abi_long ret;
+
+ ret = pipe2(host_fds, host_flags);
+ if (is_error(ret)) {
+ return get_errno(ret);
+ }
+
+ /*
+ * Several targets have special calling conventions for the original
+ * pipe syscall, but didn't replicate this into the pipe2 syscall.
+ */
+ if (!is_pipe2) {
+#if defined(TARGET_ALPHA)
+ cpu_env->ir[IR_A4] = host_fds[1];
+ return host_fds[0];
+#elif defined(TARGET_MIPS)
+ cpu_env->active_tc.gpr[3] = host_fds[1];
+ return host_fds[0];
+#elif defined(TARGET_SH4)
+ cpu_env->gregs[1] = host_fds[1];
+ return host_fds[0];
+#elif defined(TARGET_SPARC)
+ cpu_env->regwptr[1] = host_fds[1];
+ return host_fds[0];
+#endif
+ }
+
+ if (put_user_s32(host_fds[0], target_fds)
+ || put_user_s32(host_fds[1], target_fds + 4)) {
+ return -TARGET_EFAULT;
+ }
+ return 0;
+}
+
+#ifdef TARGET_NR_pipe
+SYSCALL_IMPL(pipe)
+{
+ return do_pipe(cpu_env, arg1, 0, false);
+}
+#endif
+
+SYSCALL_IMPL(pipe2)
+{
+ return do_pipe(cpu_env, arg1, arg2, true);
+}
+
/*
* Both pread64 and pwrite64 merge args into a 64-bit offset,
* but the input registers and ordering are target specific.
@@ -207,6 +207,9 @@ static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, \
#ifndef __NR_dup3
#define __NR_dup3 -1
#endif
+#ifndef __NR_pipe2
+#define __NR_pipe2 -1
+#endif
#ifndef __NR_syncfs
#define __NR_syncfs -1
#endif
@@ -283,6 +286,16 @@ _syscall5(int, kcmp, pid_t, pid1, pid_t, pid2, int, type,
#ifndef CONFIG_SYNCFS
_syscall1(int, syncfs, int, fd)
#endif
+#ifndef CONFIG_PIPE2
+static int pipe2(int *fds, int flags)
+{
+ if (flags) {
+ return syscall(__NR_pipe2, fds, flags);
+ } else {
+ return pipe(fds);
+ }
+}
+#endif
static bitmask_transtbl fcntl_flags_tbl[] = {
{ TARGET_O_ACCMODE, TARGET_O_WRONLY, O_ACCMODE, O_WRONLY, },
@@ -1134,49 +1147,6 @@ static abi_long do_old_select(abi_ulong arg1)
#endif
#endif
-static abi_long do_pipe2(int host_pipe[], int flags)
-{
-#ifdef CONFIG_PIPE2
- return pipe2(host_pipe, flags);
-#else
- return -ENOSYS;
-#endif
-}
-
-static abi_long do_pipe(void *cpu_env, abi_ulong pipedes,
- int flags, int is_pipe2)
-{
- int host_pipe[2];
- abi_long ret;
- ret = flags ? do_pipe2(host_pipe, flags) : pipe(host_pipe);
-
- if (is_error(ret))
- return get_errno(ret);
-
- /* Several targets have special calling conventions for the original
- pipe syscall, but didn't replicate this into the pipe2 syscall. */
- if (!is_pipe2) {
-#if defined(TARGET_ALPHA)
- ((CPUAlphaState *)cpu_env)->ir[IR_A4] = host_pipe[1];
- return host_pipe[0];
-#elif defined(TARGET_MIPS)
- ((CPUMIPSState*)cpu_env)->active_tc.gpr[3] = host_pipe[1];
- return host_pipe[0];
-#elif defined(TARGET_SH4)
- ((CPUSH4State*)cpu_env)->gregs[1] = host_pipe[1];
- return host_pipe[0];
-#elif defined(TARGET_SPARC)
- ((CPUSPARCState*)cpu_env)->regwptr[1] = host_pipe[1];
- return host_pipe[0];
-#endif
- }
-
- if (put_user_s32(host_pipe[0], pipedes)
- || put_user_s32(host_pipe[1], pipedes + sizeof(host_pipe[0])))
- return -TARGET_EFAULT;
- return get_errno(ret);
-}
-
static inline abi_long target_to_host_ip_mreq(struct ip_mreqn *mreqn,
abi_ulong target_addr,
socklen_t len)
@@ -5323,15 +5293,6 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
void *p;
switch(num) {
-#ifdef TARGET_NR_pipe
- case TARGET_NR_pipe:
- return do_pipe(cpu_env, arg1, 0, 0);
-#endif
-#ifdef TARGET_NR_pipe2
- case TARGET_NR_pipe2:
- return do_pipe(cpu_env, arg1,
- target_to_host_bitmask(arg2, fcntl_flags_tbl), 1);
-#endif
case TARGET_NR_times:
{
struct target_tms *tmsp;
@@ -860,9 +860,6 @@
#ifdef TARGET_NR_personality
{ TARGET_NR_personality, "personality" , NULL, NULL, NULL },
#endif
-#ifdef TARGET_NR_pipe
-{ TARGET_NR_pipe, "pipe" , NULL, NULL, NULL },
-#endif
#ifdef TARGET_NR_pivot_root
{ TARGET_NR_pivot_root, "pivot_root" , NULL, NULL, NULL },
#endif
@@ -1377,9 +1374,6 @@
#ifdef TARGET_NR_sync_file_range2
{ TARGET_NR_sync_file_range2, "sync_file_range2", NULL, NULL, NULL },
#endif
-#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
Note that pipe2 is universally available for guests. Implement host support with syscall when !CONFIG_PIPE2. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- linux-user/syscall-defs.h | 10 ++++++ linux-user/syscall-file.inc.c | 51 +++++++++++++++++++++++++++ linux-user/syscall.c | 65 +++++++---------------------------- linux-user/strace.list | 6 ---- 4 files changed, 74 insertions(+), 58 deletions(-) -- 2.17.2