linux-user: add preadv2/preadv2
Some programs apparently use these, like the python test suite. The flags argument (rwf_t) is an int, with values shared on all arches and does not need translating. This was tested manually with the following python script: ``` import os fd = os.open('test', os.O_RDWR|os.O_CREAT) os.pwritev(fd, [b'test', b'ok'], 0, os.RWF_HIPRI) buf = [bytearray(3), bytearray(10)] os.preadv(fd, buf, 0, os.RWF_HIPRI) print(buf[0]) print(buf[1]) ``` Signed-off-by: Dominique Martinet <dominique.martinet@atmark-techno.com> Reviewed-by: Helge Deller <deller@gmx.de> Signed-off-by: Helge Deller <deller@gmx.de>
Dominique Martinet committed
Jun 10, 2026 at 07:54 UTC
fb4c08147ba79c552897427a42e3b24b38712786
1 file changed
+38
linux-user/syscall.c
+38
@@ -741,6 +741,11 @@ safe_syscall5(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt,
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unsigned long, pos_l, unsigned long, pos_h)
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safe_syscall5(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt,
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unsigned long, pos_l, unsigned long, pos_h)
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+safe_syscall6(ssize_t, preadv2, int, fd, const struct iovec *, iov, int, iovcnt,
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+ unsigned long, pos_l, unsigned long, pos_h, __kernel_rwf_t, flags)
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+safe_syscall6(ssize_t, pwritev2, int, fd, const struct iovec *, iov,
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+ int, iovcnt, unsigned long, pos_l, unsigned long, pos_h,
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+ __kernel_rwf_t, flags)
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safe_syscall3(int, connect, int, fd, const struct sockaddr *, addr,
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socklen_t, addrlen)
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safe_syscall6(ssize_t, sendto, int, fd, const void *, buf, size_t, len,
@@ -11907,6 +11912,39 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
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}
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}
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return ret;
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+#endif
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+#if defined(TARGET_NR_preadv2)
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+ case TARGET_NR_preadv2:
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+ {
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+ struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 0);
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+ if (vec != NULL) {
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+ unsigned long low, high;
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+
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+ target_to_host_low_high(arg4, arg5, &low, &high);
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+ ret = get_errno(safe_preadv2(arg1, vec, arg3, low, high, arg6));
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+ unlock_iovec(vec, arg2, arg3, 1);
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+ } else {
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+ ret = -host_to_target_errno(errno);
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+ }
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+ }
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+ return ret;
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+#endif
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+#if defined(TARGET_NR_pwritev2)
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+ case TARGET_NR_pwritev2:
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+ {
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+ struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1);
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+ if (vec != NULL) {
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+ unsigned long low, high;
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+
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+ target_to_host_low_high(arg4, arg5, &low, &high);
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+ ret = get_errno(safe_pwritev2(arg1, vec, arg3, low, high,
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+ arg6));
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+ unlock_iovec(vec, arg2, arg3, 0);
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+ } else {
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+ ret = -host_to_target_errno(errno);
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+ }
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+ }
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+ return ret;
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#endif
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case TARGET_NR_getsid:
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return get_errno(getsid(arg1));