Author: cem
Date: Tue May 12 04:34:26 2020
New Revision: 360955
URL: https://svnweb.freebsd.org/changeset/base/360955
Log:
Revert r360944 and r360946 until reported issues can be resolved
Reported by: cy
Added:
head/sys/arm64/arm64/copystr.c
- copied unchanged from r360943, head/sys/arm64/arm64/copystr.c
head/sys/powerpc/powerpc/copystr.c
- copied unchanged from r360943, head/sys/powerpc/powerpc/copystr.c
head/sys/riscv/riscv/copystr.c
- copied unchanged from r360943, head/sys/riscv/riscv/copystr.c
Deleted:
head/tools/coccinelle/
Modified:
head/sys/amd64/amd64/support.S
head/sys/arm/arm/copystr.S
head/sys/conf/files.arm64
head/sys/conf/files.powerpc
head/sys/conf/files.riscv
head/sys/fs/fuse/fuse_vfsops.c
head/sys/fs/unionfs/union_vfsops.c
head/sys/i386/i386/support.s
head/sys/kern/subr_csan.c
head/sys/mips/mips/support.S
head/sys/sys/systm.h
Modified: head/sys/amd64/amd64/support.S
==============================================================================
--- head/sys/amd64/amd64/support.S Tue May 12 02:23:11 2020
(r360954)
+++ head/sys/amd64/amd64/support.S Tue May 12 04:34:26 2020
(r360955)
@@ -1417,6 +1417,43 @@ copyinstr_toolong:
jmp cpystrflt_x
/*
+ * copystr(from, to, maxlen, int *lencopied)
+ * %rdi, %rsi, %rdx, %rcx
+ */
+ENTRY(copystr)
+ PUSH_FRAME_POINTER
+ movq %rdx,%r8 /* %r8 = maxlen */
+
+ incq %rdx
+1:
+ decq %rdx
+ jz 4f
+ movb (%rdi),%al
+ movb %al,(%rsi)
+ incq %rsi
+ incq %rdi
+ testb %al,%al
+ jnz 1b
+
+ /* Success -- 0 byte reached */
+ decq %rdx
+ xorl %eax,%eax
+2:
+ testq %rcx,%rcx
+ jz 3f
+ /* set *lencopied and return %rax */
+ subq %rdx,%r8
+ movq %r8,(%rcx)
+3:
+ POP_FRAME_POINTER
+ ret
+4:
+ /* rdx is zero -- return ENAMETOOLONG */
+ movl $ENAMETOOLONG,%eax
+ jmp 2b
+END(copystr)
+
+/*
* Handling of special amd64 registers and descriptor tables etc
*/
/* void lgdt(struct region_descriptor *rdp); */
Modified: head/sys/arm/arm/copystr.S
==============================================================================
--- head/sys/arm/arm/copystr.S Tue May 12 02:23:11 2020 (r360954)
+++ head/sys/arm/arm/copystr.S Tue May 12 04:34:26 2020 (r360955)
@@ -60,6 +60,39 @@ __FBSDID("$FreeBSD$");
ldr tmp, .Lpcb
#endif
+/*
+ * r0 - from
+ * r1 - to
+ * r2 - maxlens
+ * r3 - lencopied
+ *
+ * Copy string from r0 to r1
+ */
+ENTRY(copystr)
+ stmfd sp!, {r4-r5} /* stack is 8 byte aligned */
+ teq r2, #0x00000000
+ mov r5, #0x00000000
+ moveq r0, #ENAMETOOLONG
+ beq 2f
+
+1: ldrb r4, [r0], #0x0001
+ add r5, r5, #0x00000001
+ teq r4, #0x00000000
+ strb r4, [r1], #0x0001
+ teqne r5, r2
+ bne 1b
+
+ teq r4, #0x00000000
+ moveq r0, #0x00000000
+ movne r0, #ENAMETOOLONG
+
+2: teq r3, #0x00000000
+ strne r5, [r3]
+
+ ldmfd sp!, {r4-r5} /* stack is 8 byte aligned */
+ RET
+END(copystr)
+
#define SAVE_REGS stmfd sp!, {r4-r6}
#define RESTORE_REGS ldmfd sp!, {r4-r6}
Copied: head/sys/arm64/arm64/copystr.c (from r360943,
head/sys/arm64/arm64/copystr.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm64/arm64/copystr.c Tue May 12 04:34:26 2020
(r360955, copy of r360943, head/sys/arm64/arm64/copystr.c)
@@ -0,0 +1,61 @@
+/*-
+ * Copyright (c) 2014 Andrew Turner
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+int
+(copystr)(const void * __restrict kfaddr, void * __restrict kdaddr, size_t len,
+ size_t * __restrict lencopied)
+{
+ const char *src;
+ size_t pos;
+ char *dst;
+ int error;
+
+ error = ENAMETOOLONG;
+ src = kfaddr;
+ dst = kdaddr;
+ for (pos = 0; pos < len; pos++) {
+ dst[pos] = src[pos];
+ if (src[pos] == '\0') {
+ /* Increment pos to hold the number of bytes copied */
+ pos++;
+ error = 0;
+ break;
+ }
+ }
+
+ if (lencopied != NULL)
+ *lencopied = pos;
+
+ return (error);
+}
+
Modified: head/sys/conf/files.arm64
==============================================================================
--- head/sys/conf/files.arm64 Tue May 12 02:23:11 2020 (r360954)
+++ head/sys/conf/files.arm64 Tue May 12 04:34:26 2020 (r360955)
@@ -133,6 +133,7 @@ arm64/arm64/busdma_machdep.c standard
arm64/arm64/bzero.S standard
arm64/arm64/clock.c standard
arm64/arm64/copyinout.S standard
+arm64/arm64/copystr.c standard
arm64/arm64/cpu_errata.c standard
arm64/arm64/cpufunc_asm.S standard
arm64/arm64/db_disasm.c optional ddb
Modified: head/sys/conf/files.powerpc
==============================================================================
--- head/sys/conf/files.powerpc Tue May 12 02:23:11 2020 (r360954)
+++ head/sys/conf/files.powerpc Tue May 12 04:34:26 2020 (r360955)
@@ -241,6 +241,7 @@ powerpc/powerpc/bus_machdep.c standard
powerpc/powerpc/busdma_machdep.c standard
powerpc/powerpc/clock.c standard
powerpc/powerpc/copyinout.c standard
+powerpc/powerpc/copystr.c standard
powerpc/powerpc/cpu.c standard
powerpc/powerpc/cpu_subr64.S optional powerpc64
powerpc/powerpc/db_disasm.c optional ddb
Modified: head/sys/conf/files.riscv
==============================================================================
--- head/sys/conf/files.riscv Tue May 12 02:23:11 2020 (r360954)
+++ head/sys/conf/files.riscv Tue May 12 04:34:26 2020 (r360955)
@@ -37,6 +37,7 @@ riscv/riscv/busdma_bounce.c standard
riscv/riscv/busdma_machdep.c standard
riscv/riscv/clock.c standard
riscv/riscv/copyinout.S standard
+riscv/riscv/copystr.c standard
riscv/riscv/cpufunc_asm.S standard
riscv/riscv/db_disasm.c optional ddb
riscv/riscv/db_interface.c optional ddb
Modified: head/sys/fs/fuse/fuse_vfsops.c
==============================================================================
--- head/sys/fs/fuse/fuse_vfsops.c Tue May 12 02:23:11 2020
(r360954)
+++ head/sys/fs/fuse/fuse_vfsops.c Tue May 12 04:34:26 2020
(r360955)
@@ -303,6 +303,8 @@ fuse_vfsop_mount(struct mount *mp)
int daemon_timeout;
int fd;
+ size_t len;
+
struct cdev *fdev;
struct fuse_data *data = NULL;
struct thread *td;
@@ -430,8 +432,8 @@ fuse_vfsop_mount(struct mount *mp)
strlcat(mp->mnt_stat.f_fstypename, ".", MFSNAMELEN);
strlcat(mp->mnt_stat.f_fstypename, subtype, MFSNAMELEN);
}
- memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
- strlcpy(mp->mnt_stat.f_mntfromname, fspec, MNAMELEN);
+ copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &len);
+ bzero(mp->mnt_stat.f_mntfromname + len, MNAMELEN - len);
mp->mnt_iosize_max = MAXPHYS;
/* Now handshaking with daemon */
Modified: head/sys/fs/unionfs/union_vfsops.c
==============================================================================
--- head/sys/fs/unionfs/union_vfsops.c Tue May 12 02:23:11 2020
(r360954)
+++ head/sys/fs/unionfs/union_vfsops.c Tue May 12 04:34:26 2020
(r360955)
@@ -83,6 +83,7 @@ unionfs_domount(struct mount *mp)
char *tmp;
char *ep;
int len;
+ size_t done;
int below;
uid_t uid;
gid_t gid;
@@ -303,8 +304,12 @@ unionfs_domount(struct mount *mp)
*/
vfs_getnewfsid(mp);
- snprintf(mp->mnt_stat.f_mntfromname, MNAMELEN, "<%s>:%s",
- below ? "below" : "above", target);
+ len = MNAMELEN - 1;
+ tmp = mp->mnt_stat.f_mntfromname;
+ copystr((below ? "<below>:" : "<above>:"), tmp, len, &done);
+ len -= done - 1;
+ tmp += done - 1;
+ copystr(target, tmp, len, NULL);
UNIONFSDEBUG("unionfs_mount: from %s, on %s\n",
mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
Modified: head/sys/i386/i386/support.s
==============================================================================
--- head/sys/i386/i386/support.s Tue May 12 02:23:11 2020
(r360954)
+++ head/sys/i386/i386/support.s Tue May 12 04:34:26 2020
(r360955)
@@ -233,6 +233,47 @@ ENTRY(memcpy)
ret
END(memcpy)
+/*
+ * copystr(from, to, maxlen, int *lencopied) - MP SAFE
+ */
+ENTRY(copystr)
+ pushl %esi
+ pushl %edi
+
+ movl 12(%esp),%esi /* %esi = from */
+ movl 16(%esp),%edi /* %edi = to */
+ movl 20(%esp),%edx /* %edx = maxlen */
+ incl %edx
+1:
+ decl %edx
+ jz 4f
+ lodsb
+ stosb
+ orb %al,%al
+ jnz 1b
+
+ /* Success -- 0 byte reached */
+ decl %edx
+ xorl %eax,%eax
+ jmp 6f
+4:
+ /* edx is zero -- return ENAMETOOLONG */
+ movl $ENAMETOOLONG,%eax
+
+6:
+ /* set *lencopied and return %eax */
+ movl 20(%esp),%ecx
+ subl %edx,%ecx
+ movl 24(%esp),%edx
+ testl %edx,%edx
+ jz 7f
+ movl %ecx,(%edx)
+7:
+ popl %edi
+ popl %esi
+ ret
+END(copystr)
+
ENTRY(bcmp)
pushl %edi
pushl %esi
Modified: head/sys/kern/subr_csan.c
==============================================================================
--- head/sys/kern/subr_csan.c Tue May 12 02:23:11 2020 (r360954)
+++ head/sys/kern/subr_csan.c Tue May 12 04:34:26 2020 (r360955)
@@ -350,11 +350,19 @@ kcsan_strlen(const char *str)
return (s - str);
}
+#undef copystr
#undef copyin
#undef copyin_nofault
#undef copyinstr
#undef copyout
#undef copyout_nofault
+
+int
+kcsan_copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done)
+{
+ kcsan_access((uintptr_t)kdaddr, len, true, false, __RET_ADDR);
+ return copystr(kfaddr, kdaddr, len, done);
+}
int
kcsan_copyin(const void *uaddr, void *kaddr, size_t len)
Modified: head/sys/mips/mips/support.S
==============================================================================
--- head/sys/mips/mips/support.S Tue May 12 02:23:11 2020
(r360954)
+++ head/sys/mips/mips/support.S Tue May 12 04:34:26 2020
(r360955)
@@ -105,22 +105,12 @@
.text
/*
- * Copy a null terminated string from the user address space into
- * the kernel address space.
- *
- * copyinstr(fromaddr, toaddr, maxlength, &lencopied)
- * caddr_t fromaddr;
- * caddr_t toaddr;
- * u_int maxlength;
- * u_int *lencopied;
+ * int copystr(void *kfaddr, void *kdaddr, size_t maxlen, size_t *lencopied)
+ * Copy a NIL-terminated string, at most maxlen characters long. Return the
+ * number of characters copied (including the NIL) in *lencopied. If the
+ * string is too long, return ENAMETOOLONG; else return 0.
*/
-LEAF(copyinstr)
- PTR_LA v0, __copyinstr_err
- blt a0, zero, __copyinstr_err # make sure address is in
user space
- GET_CPU_PCPU(v1)
- PTR_L v1, PC_CURPCB(v1)
- PTR_S v0, U_PCB_ONFAULT(v1)
-
+LEAF(copystr)
move t0, a2
beq a2, zero, 4f
1:
@@ -138,14 +128,37 @@ LEAF(copyinstr)
PTR_SUBU a2, t0, a2 # if the 4th arg was non-NULL
PTR_S a2, 0(a3)
3:
-
- PTR_S zero, U_PCB_ONFAULT(v1)
- j ra
+ j ra # v0 is 0 or ENAMETOOLONG
nop
+END(copystr)
-__copyinstr_err:
- j ra
- li v0, EFAULT
+
+/*
+ * Copy a null terminated string from the user address space into
+ * the kernel address space.
+ *
+ * copyinstr(fromaddr, toaddr, maxlength, &lencopied)
+ * caddr_t fromaddr;
+ * caddr_t toaddr;
+ * u_int maxlength;
+ * u_int *lencopied;
+ */
+NESTED(copyinstr, CALLFRAME_SIZ, ra)
+ PTR_SUBU sp, sp, CALLFRAME_SIZ
+ .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
+ PTR_LA v0, copyerr
+ blt a0, zero, _C_LABEL(copyerr) # make sure address is in user
space
+ REG_S ra, CALLFRAME_RA(sp)
+ GET_CPU_PCPU(v1)
+ PTR_L v1, PC_CURPCB(v1)
+ jal _C_LABEL(copystr)
+ PTR_S v0, U_PCB_ONFAULT(v1)
+ REG_L ra, CALLFRAME_RA(sp)
+ GET_CPU_PCPU(v1)
+ PTR_L v1, PC_CURPCB(v1)
+ PTR_S zero, U_PCB_ONFAULT(v1)
+ j ra
+ PTR_ADDU sp, sp, CALLFRAME_SIZ
END(copyinstr)
/*
Copied: head/sys/powerpc/powerpc/copystr.c (from r360943,
head/sys/powerpc/powerpc/copystr.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/powerpc/powerpc/copystr.c Tue May 12 04:34:26 2020
(r360955, copy of r360943, head/sys/powerpc/powerpc/copystr.c)
@@ -0,0 +1,70 @@
+/*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
+ * Copyright (C) 1995 Wolfgang Solfrank.
+ * Copyright (C) 1995 TooLs GmbH.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by TooLs GmbH.
+ * 4. The name of TooLs GmbH may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $NetBSD: copystr.c,v 1.3 2000/06/08 06:47:17 kleink Exp $
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/systm.h>
+
+/*
+ * Emulate copyinstr.
+ */
+int
+copystr(kfaddr, kdaddr, len, done)
+ const void *kfaddr;
+ void *kdaddr;
+ size_t len;
+ size_t *done;
+{
+ const u_char *kfp = kfaddr;
+ u_char *kdp = kdaddr;
+ size_t l;
+ int rv;
+
+ rv = ENAMETOOLONG;
+ for (l = 0; len-- > 0; l++) {
+ if (!(*kdp++ = *kfp++)) {
+ l++;
+ rv = 0;
+ break;
+ }
+ }
+ if (done != NULL) {
+ *done = l;
+ }
+ return rv;
+}
Copied: head/sys/riscv/riscv/copystr.c (from r360943,
head/sys/riscv/riscv/copystr.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/riscv/riscv/copystr.c Tue May 12 04:34:26 2020
(r360955, copy of r360943, head/sys/riscv/riscv/copystr.c)
@@ -0,0 +1,59 @@
+/*-
+ * Copyright (c) 2014 Andrew Turner
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+int
+copystr(const void * __restrict kfaddr, void * __restrict kdaddr, size_t len,
+ size_t * __restrict lencopied)
+{
+ const char *src;
+ size_t pos;
+ char *dst;
+ int error;
+
+ error = ENAMETOOLONG;
+ src = kfaddr;
+ dst = kdaddr;
+ for (pos = 0; pos < len; pos++) {
+ dst[pos] = src[pos];
+ if (src[pos] == '\0') {
+ /* Increment pos to hold the number of bytes copied */
+ pos++;
+ error = 0;
+ break;
+ }
+ }
+
+ if (lencopied != NULL)
+ *lencopied = pos;
+
+ return (error);
+}
Modified: head/sys/sys/systm.h
==============================================================================
--- head/sys/sys/systm.h Tue May 12 02:23:11 2020 (r360954)
+++ head/sys/sys/systm.h Tue May 12 04:34:26 2020 (r360955)
@@ -362,17 +362,9 @@ void *memcpy_early(void * _Nonnull to, const void *
_N
void *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t
n);
#define bcopy_early(from, to, len) memmove_early((to), (from), (len))
-#define copystr(src, dst, len, outlen) ({ \
- size_t __r, __len, *__outlen; \
- \
- __len = (len); \
- __outlen = (outlen); \
- __r = strlcpy((dst), (src), __len); \
- if (__outlen != NULL) \
- *__outlen = ((__r >= __len) ? __len : __r); \
- ((__r >= __len) ? ENAMETOOLONG : 0); \
-})
-
+int copystr(const void * _Nonnull __restrict kfaddr,
+ void * _Nonnull __restrict kdaddr, size_t len,
+ size_t * __restrict lencopied);
int copyinstr(const void * __restrict udaddr,
void * _Nonnull __restrict kaddr, size_t len,
size_t * __restrict lencopied);
@@ -386,9 +378,11 @@ int copyout_nofault(const void * _Nonnull
__restrict k
void * __restrict udaddr, size_t len);
#ifdef KCSAN
+int kcsan_copystr(const void *, void *, size_t, size_t *);
int kcsan_copyin(const void *, void *, size_t);
int kcsan_copyinstr(const void *, void *, size_t, size_t *);
int kcsan_copyout(const void *, void *, size_t);
+#define copystr(kf, k, l, lc) kcsan_copystr((kf), (k), (l), (lc))
#define copyin(u, k, l) kcsan_copyin((u), (k), (l))
#define copyinstr(u, k, l, lc) kcsan_copyinstr((u), (k), (l), (lc))
#define copyout(k, u, l) kcsan_copyout((k), (u), (l))
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