mirror of https://github.com/proxmox/mirror_qemu
bsd-user/bsd-file.h: Meat of the write system calls
Implement write, writev, pwrite and pwritev and connect them to the system call dispatch routine. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Kyle Evans <kevans@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>master
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80da1b0088
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770d8abae7
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@ -32,6 +32,11 @@ ssize_t safe_pread(int fd, void *buf, size_t nbytes, off_t offset);
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ssize_t safe_readv(int fd, const struct iovec *iov, int iovcnt);
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ssize_t safe_readv(int fd, const struct iovec *iov, int iovcnt);
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ssize_t safe_preadv(int fd, const struct iovec *iov, int iovcnt, off_t offset);
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ssize_t safe_preadv(int fd, const struct iovec *iov, int iovcnt, off_t offset);
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ssize_t safe_write(int fd, void *buf, size_t nbytes);
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ssize_t safe_pwrite(int fd, void *buf, size_t nbytes, off_t offset);
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ssize_t safe_writev(int fd, const struct iovec *iov, int iovcnt);
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ssize_t safe_pwritev(int fd, const struct iovec *iov, int iovcnt, off_t offset);
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/* read(2) */
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/* read(2) */
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static abi_long do_bsd_read(abi_long arg1, abi_long arg2, abi_long arg3)
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static abi_long do_bsd_read(abi_long arg1, abi_long arg2, abi_long arg3)
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{
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{
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@ -106,4 +111,83 @@ static abi_long do_bsd_preadv(void *cpu_env, abi_long arg1,
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return ret;
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return ret;
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}
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}
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/* write(2) */
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static abi_long do_bsd_write(abi_long arg1, abi_long arg2, abi_long arg3)
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{
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abi_long nbytes, ret;
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void *p;
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/* nbytes < 0 implies that it was larger than SIZE_MAX. */
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nbytes = arg3;
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if (nbytes < 0) {
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return -TARGET_EINVAL;
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}
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p = lock_user(VERIFY_READ, arg2, nbytes, 1);
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if (p == NULL) {
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return -TARGET_EFAULT;
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}
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ret = get_errno(safe_write(arg1, p, arg3));
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unlock_user(p, arg2, 0);
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return ret;
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}
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/* pwrite(2) */
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static abi_long do_bsd_pwrite(void *cpu_env, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6)
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{
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abi_long ret;
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void *p;
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p = lock_user(VERIFY_READ, arg2, arg3, 1);
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if (p == NULL) {
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return -TARGET_EFAULT;
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}
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if (regpairs_aligned(cpu_env) != 0) {
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arg4 = arg5;
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arg5 = arg6;
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}
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ret = get_errno(safe_pwrite(arg1, p, arg3, target_arg64(arg4, arg5)));
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unlock_user(p, arg2, 0);
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return ret;
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}
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/* writev(2) */
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static abi_long do_bsd_writev(abi_long arg1, abi_long arg2, abi_long arg3)
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{
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abi_long ret;
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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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ret = get_errno(safe_writev(arg1, vec, arg3));
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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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return ret;
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}
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/* pwritev(2) */
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static abi_long do_bsd_pwritev(void *cpu_env, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6)
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{
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abi_long ret;
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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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if (regpairs_aligned(cpu_env) != 0) {
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arg4 = arg5;
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arg5 = arg6;
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}
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ret = get_errno(safe_pwritev(arg1, vec, arg3, target_arg64(arg4, arg5)));
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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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return ret;
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}
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#endif /* BSD_FILE_H */
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#endif /* BSD_FILE_H */
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@ -50,6 +50,13 @@ safe_syscall3(ssize_t, readv, int, fd, const struct iovec *, iov, int, iovcnt);
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safe_syscall4(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt,
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safe_syscall4(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt,
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off_t, offset);
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off_t, offset);
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safe_syscall3(ssize_t, write, int, fd, void *, buf, size_t, nbytes);
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safe_syscall4(ssize_t, pwrite, int, fd, void *, buf, size_t, nbytes, off_t,
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offset);
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safe_syscall3(ssize_t, writev, int, fd, const struct iovec *, iov, int, iovcnt);
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safe_syscall4(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt,
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off_t, offset);
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void target_set_brk(abi_ulong new_brk)
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void target_set_brk(abi_ulong new_brk)
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{
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{
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}
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}
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@ -226,6 +233,21 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
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case TARGET_FREEBSD_NR_preadv: /* preadv(2) */
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case TARGET_FREEBSD_NR_preadv: /* preadv(2) */
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ret = do_bsd_preadv(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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ret = do_bsd_preadv(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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case TARGET_FREEBSD_NR_write: /* write(2) */
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ret = do_bsd_write(arg1, arg2, arg3);
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break;
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case TARGET_FREEBSD_NR_pwrite: /* pwrite(2) */
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ret = do_bsd_pwrite(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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break;
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case TARGET_FREEBSD_NR_writev: /* writev(2) */
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ret = do_bsd_writev(arg1, arg2, arg3);
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break;
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case TARGET_FREEBSD_NR_pwritev: /* pwritev(2) */
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ret = do_bsd_pwritev(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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break;
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break;
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default:
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default:
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