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[src/thorpej-futex]: src/sys/compat/linux/common Add suppport for Linux pread...
details: https://anonhg.NetBSD.org/src/rev/6fefe519c6fe
branches: thorpej-futex
changeset: 982897:6fefe519c6fe
user: thorpej <thorpej%NetBSD.org@localhost>
date: Thu Dec 17 03:14:15 2020 +0000
description:
Add suppport for Linux preadv(2) and pwritev(2). Same as native, except
for the silly way that the offset argument is passed in.
diffstat:
sys/compat/linux/arch/alpha/syscalls.master | 10 ++-
sys/compat/linux/arch/amd64/syscalls.master | 10 ++-
sys/compat/linux/arch/arm/syscalls.master | 10 ++-
sys/compat/linux/arch/i386/syscalls.master | 10 ++-
sys/compat/linux/arch/m68k/syscalls.master | 10 ++-
sys/compat/linux/arch/mips/syscalls.master | 10 ++-
sys/compat/linux/arch/powerpc/syscalls.master | 10 ++-
sys/compat/linux/common/linux_file.c | 71 ++++++++++++++++++++++++++-
8 files changed, 118 insertions(+), 23 deletions(-)
diffs (267 lines):
diff -r ceadef3c0f23 -r 6fefe519c6fe sys/compat/linux/arch/alpha/syscalls.master
--- a/sys/compat/linux/arch/alpha/syscalls.master Thu Dec 17 03:05:50 2020 +0000
+++ b/sys/compat/linux/arch/alpha/syscalls.master Thu Dec 17 03:14:15 2020 +0000
@@ -1,4 +1,4 @@
- $NetBSD: syscalls.master,v 1.97.2.1 2020/12/15 14:07:20 thorpej Exp $
+ $NetBSD: syscalls.master,v 1.97.2.2 2020/12/17 03:14:15 thorpej Exp $
;
; @(#)syscalls.master 8.1 (Berkeley) 7/19/93
@@ -784,8 +784,12 @@
487 STD { int|linux_sys||dup3(int from, int to, int flags); }
488 STD { int|linux_sys||pipe2(int *pfds, int flags); }
489 UNIMPL inotify_init1
-490 UNIMPL preadv
-491 UNIMPL pwritev
+490 STD { int|linux_sys||preadv(int fd, \
+ const struct iovec *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
+491 STD { int|linux_sys||pwritev(int fd, \
+ const struct iovcnt *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
492 UNIMPL rt_tgsigqueueinfo
493 UNIMPL perf_counter_open
494 UNIMPL fanotify_init
diff -r ceadef3c0f23 -r 6fefe519c6fe sys/compat/linux/arch/amd64/syscalls.master
--- a/sys/compat/linux/arch/amd64/syscalls.master Thu Dec 17 03:05:50 2020 +0000
+++ b/sys/compat/linux/arch/amd64/syscalls.master Thu Dec 17 03:14:15 2020 +0000
@@ -1,4 +1,4 @@
- $NetBSD: syscalls.master,v 1.62.2.1 2020/12/15 14:07:20 thorpej Exp $
+ $NetBSD: syscalls.master,v 1.62.2.2 2020/12/17 03:14:15 thorpej Exp $
; @(#)syscalls.master 8.1 (Berkeley) 7/19/93
@@ -539,8 +539,12 @@
292 STD { int|linux_sys||dup3(int from, int to, int flags); }
293 STD { int|linux_sys||pipe2(int *pfds, int flags); }
294 UNIMPL inotify_init1
-295 UNIMPL preadv
-296 UNIMPL pwritev
+295 STD { int|linux_sys||preadv(int fd, \
+ const struct iovec *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
+296 STD { int|linux_sys||pwritev(int fd, \
+ const struct iovcnt *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
297 UNIMPL rt_tgsigqueueinfo
298 UNIMPL perf_counter_open
299 STD { int|linux_sys||recvmmsg(int s, \
diff -r ceadef3c0f23 -r 6fefe519c6fe sys/compat/linux/arch/arm/syscalls.master
--- a/sys/compat/linux/arch/arm/syscalls.master Thu Dec 17 03:05:50 2020 +0000
+++ b/sys/compat/linux/arch/arm/syscalls.master Thu Dec 17 03:14:15 2020 +0000
@@ -1,4 +1,4 @@
- $NetBSD: syscalls.master,v 1.69.2.1 2020/12/15 14:07:21 thorpej Exp $
+ $NetBSD: syscalls.master,v 1.69.2.2 2020/12/17 03:14:15 thorpej Exp $
; Derived from sys/compat/linux/arch/*/syscalls.master
; and from Linux 2.4.12 arch/arm/kernel/calls.S
@@ -579,8 +579,12 @@
358 STD { int|linux_sys||dup3(int from, int to, int flags); }
359 STD { int|linux_sys||pipe2(int *pfds, int flags); }
360 UNIMPL inotify_init1
-361 UNIMPL preadv
-362 UNIMPL pwritev
+361 STD { int|linux_sys||preadv(int fd, \
+ const struct iovec *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
+362 STD { int|linux_sys||pwritev(int fd, \
+ const struct iovcnt *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
363 UNIMPL rt_tgsigqueueinfo
364 UNIMPL perf_counter_open
365 STD { int|linux_sys||recvmmsg(int s, \
diff -r ceadef3c0f23 -r 6fefe519c6fe sys/compat/linux/arch/i386/syscalls.master
--- a/sys/compat/linux/arch/i386/syscalls.master Thu Dec 17 03:05:50 2020 +0000
+++ b/sys/compat/linux/arch/i386/syscalls.master Thu Dec 17 03:14:15 2020 +0000
@@ -1,4 +1,4 @@
- $NetBSD: syscalls.master,v 1.124.2.1 2020/12/15 14:07:21 thorpej Exp $
+ $NetBSD: syscalls.master,v 1.124.2.2 2020/12/17 03:14:15 thorpej Exp $
; @(#)syscalls.master 8.1 (Berkeley) 7/19/93
@@ -546,8 +546,12 @@
330 STD { int|linux_sys||dup3(int from, int to, int flags); }
331 STD { int|linux_sys||pipe2( int *pfds, int flags); }
332 UNIMPL inotify_init1
-333 UNIMPL preadv
-334 UNIMPL pwritev
+333 STD { int|linux_sys||preadv(int fd, \
+ const struct iovec *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
+334 STD { int|linux_sys||pwritev(int fd, \
+ const struct iovcnt *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
335 UNIMPL rt_tgsigqueueinfo
336 UNIMPL perf_counter_open
337 UNIMPL recvmmsg
diff -r ceadef3c0f23 -r 6fefe519c6fe sys/compat/linux/arch/m68k/syscalls.master
--- a/sys/compat/linux/arch/m68k/syscalls.master Thu Dec 17 03:05:50 2020 +0000
+++ b/sys/compat/linux/arch/m68k/syscalls.master Thu Dec 17 03:14:15 2020 +0000
@@ -1,4 +1,4 @@
- $NetBSD: syscalls.master,v 1.95.2.1 2020/12/15 14:07:21 thorpej Exp $
+ $NetBSD: syscalls.master,v 1.95.2.2 2020/12/17 03:14:15 thorpej Exp $
; @(#)syscalls.master 8.1 (Berkeley) 7/19/93
@@ -564,8 +564,12 @@
326 STD { int|linux_sys||dup3(int from, int to, int flags); }
327 STD { int|linux_sys||pipe2(int *pfds, int flags); }
328 UNIMPL inotify_init1
-329 UNIMPL preadv
-330 UNIMPL pwritev
+329 STD { int|linux_sys||preadv(int fd, \
+ const struct iovec *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
+330 STD { int|linux_sys||pwritev(int fd, \
+ const struct iovcnt *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
331 UNIMPL rt_tgsigqueueinfo
332 UNIMPL perf_counter_open
333 UNIMPL set_thread_area
diff -r ceadef3c0f23 -r 6fefe519c6fe sys/compat/linux/arch/mips/syscalls.master
--- a/sys/compat/linux/arch/mips/syscalls.master Thu Dec 17 03:05:50 2020 +0000
+++ b/sys/compat/linux/arch/mips/syscalls.master Thu Dec 17 03:14:15 2020 +0000
@@ -1,4 +1,4 @@
- $NetBSD: syscalls.master,v 1.68.2.1 2020/12/15 14:07:21 thorpej Exp $
+ $NetBSD: syscalls.master,v 1.68.2.2 2020/12/17 03:14:15 thorpej Exp $
; @(#)syscalls.master 8.1 (Berkeley) 7/19/93
@@ -553,8 +553,12 @@
327 STD { int|linux_sys||dup3(int from, int to, int flags); }
328 STD { int|linux_sys||pipe2(int *pfds, int flags); }
329 UNIMPL inotify_init1
-330 UNIMPL preadv
-331 UNIMPL pwritev
+330 STD { int|linux_sys||preadv(int fd, \
+ const struct iovec *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
+331 STD { int|linux_sys||pwritev(int fd, \
+ const struct iovcnt *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
332 UNIMPL rt_tgsigqueueinfo
333 UNIMPL perf_event_open
334 STD { int|linux_sys||accept4(int s, \
diff -r ceadef3c0f23 -r 6fefe519c6fe sys/compat/linux/arch/powerpc/syscalls.master
--- a/sys/compat/linux/arch/powerpc/syscalls.master Thu Dec 17 03:05:50 2020 +0000
+++ b/sys/compat/linux/arch/powerpc/syscalls.master Thu Dec 17 03:14:15 2020 +0000
@@ -1,4 +1,4 @@
- $NetBSD: syscalls.master,v 1.74.2.1 2020/12/15 14:07:21 thorpej Exp $
+ $NetBSD: syscalls.master,v 1.74.2.2 2020/12/17 03:14:16 thorpej Exp $
; @(#)syscalls.master 8.1 (Berkeley) 7/19/93
@@ -553,8 +553,12 @@
317 STD { int|linux_sys||pipe2(int *pfds, int flags); }
318 UNIMPL inotify_init1
319 UNIMPL perf_event_open
-320 UNIMPL preadv
-321 UNIMPL pwritev
+320 STD { int|linux_sys||preadv(int fd, \
+ const struct iovec *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
+321 STD { int|linux_sys||pwritev(int fd, \
+ const struct iovcnt *iovp, int iovcnt, \
+ unsigned long off_lo, unsigned long off_hi); }
322 UNIMPL rt_tgsigqueueinfo
323 UNIMPL fanotify_init
324 UNIMPL fanotify_mark
diff -r ceadef3c0f23 -r 6fefe519c6fe sys/compat/linux/common/linux_file.c
--- a/sys/compat/linux/common/linux_file.c Thu Dec 17 03:05:50 2020 +0000
+++ b/sys/compat/linux/common/linux_file.c Thu Dec 17 03:14:15 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: linux_file.c,v 1.118 2020/05/23 23:42:41 ad Exp $ */
+/* $NetBSD: linux_file.c,v 1.118.2.1 2020/12/17 03:14:16 thorpej Exp $ */
/*-
* Copyright (c) 1995, 1998, 2008 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_file.c,v 1.118 2020/05/23 23:42:41 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_file.c,v 1.118.2.1 2020/12/17 03:14:16 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -136,6 +136,23 @@
return res;
}
+static inline off_t
+linux_hilo_to_off_t(unsigned long hi, unsigned long lo)
+{
+#ifdef _LP64
+ /*
+ * Linux discards the "hi" portion on LP64 platforms; even though
+ * glibc puts of the upper 32-bits of the offset into the "hi"
+ * argument regardless, the "lo" argument has all the bits in
+ * this case.
+ */
+ (void) hi;
+ return (off_t)lo;
+#else
+ return (((off_t)hi) << 32) | lo;
+#endif /* _LP64 */
+}
+
/*
* creat(2) is an obsolete function, but it's present as a Linux
* system call, so let's deal with it.
@@ -784,6 +801,56 @@
return sys_pwrite(l, &pra, retval);
}
+/*
+ * preadv(2)
+ */
+int
+linux_sys_preadv(struct lwp *l, const struct linux_sys_preadv_args *uap,
+ register_t *retval)
+{
+ /* {
+ syscallarg(int) fd;
+ syscallarg(const struct iovec *) iovp;
+ syscallarg(int) iovcnt;
+ syscallarg(unsigned long) off_lo;
+ syscallarg(unsigned long) off_hi;
+ } */
+ struct sys_preadv_args ua;
+
+ SCARG(&ua, fd) = SCARG(uap, fd);
+ SCARG(&ua, iovp) = SCARG(uap, iovp);
+ SCARG(&ua, iovcnt) = SCARG(uap, iovcnt);
+ SCARG(&ua, PAD) = 0;
+ SCARG(&ua, offset) = linux_hilo_to_off_t(SCARG(uap, off_hi),
+ SCARG(uap, off_lo));
+ return sys_preadv(l, &ua, retval);
+}
+
+/*
+ * pwritev(2)
+ */
+int
+linux_sys_pwritev(struct lwp *l, const struct linux_sys_pwritev_args *uap,
+ register_t *retval)
+{
+ /* {
+ syscallarg(int) fd;
+ syscallarg(const struct iovec *) iovp;
+ syscallarg(int) iovcnt;
+ syscallarg(unsigned long) off_lo;
+ syscallarg(unsigned long) off_hi;
+ } */
+ struct sys_pwritev_args ua;
+
+ SCARG(&ua, fd) = SCARG(uap, fd);
+ SCARG(&ua, iovp) = (const void *)SCARG(uap, iovp);
+ SCARG(&ua, iovcnt) = SCARG(uap, iovcnt);
+ SCARG(&ua, PAD) = 0;
+ SCARG(&ua, offset) = linux_hilo_to_off_t(SCARG(uap, off_hi),
+ SCARG(uap, off_lo));
+ return sys_pwritev(l, &ua, retval);
+}
+
int
linux_sys_dup3(struct lwp *l, const struct linux_sys_dup3_args *uap,
register_t *retval)
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