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Rewrite ptrace(2) wrappers in C.

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Besides removing hand-translation to assembler, this also adds missing
wrappers for arm64 and risc-v.

Reviewed by:	emaste, jhb
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D7694
This commit is contained in:
Konstantin Belousov 2016-08-29 18:47:51 +00:00
parent 771e2c7753
commit afd3e268d2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=305012
17 changed files with 58 additions and 441 deletions
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2
lib/libc/amd64/sys/Makefile.inc
View File

@ -4,7 +4,7 @@
SRCS+= amd64_get_fsbase.c amd64_get_gsbase.c amd64_set_fsbase.c \
amd64_set_gsbase.c
MDASM= vfork.S brk.S cerror.S exect.S getcontext.S ptrace.S \
MDASM= vfork.S brk.S cerror.S exect.S getcontext.S \
sbrk.S setlogin.S sigreturn.S
# Don't generate default code for these syscalls:

67
lib/libc/amd64/sys/ptrace.S
View File

@ -1,67 +0,0 @@
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(SYSLIBC_SCCS) && !defined(lint)
.asciz "@(#)ptrace.s 5.1 (Berkeley) 4/23/90"
#endif /* SYSLIBC_SCCS and not lint */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
.globl CNAME(__error)
.type CNAME(__error),@function
ENTRY(ptrace)
pushq %rdi /* align stack */
pushq %rdi
pushq %rsi
pushq %rdx
pushq %rcx
#ifdef PIC
callq PIC_PLT(CNAME(__error))
#else
callq CNAME(__error)
#endif
popq %rcx
popq %rdx
popq %rsi
popq %rdi
popq %rdi
movl $0,(%rax)
mov $SYS_ptrace,%eax
KERNCALL
jb HIDENAME(cerror)
ret
END(ptrace)
.section .note.GNU-stack,"",%progbits

2
lib/libc/arm/sys/Makefile.inc
View File

@ -2,7 +2,7 @@
SRCS+= __vdso_gettc.c
MDASM= Ovfork.S brk.S cerror.S ptrace.S sbrk.S shmat.S sigreturn.S syscall.S
MDASM= Ovfork.S brk.S cerror.S sbrk.S shmat.S sigreturn.S syscall.S
# Don't generate default code for these syscalls:
NOASM= break.o exit.o getlogin.o sstk.o vfork.o yield.o

51
lib/libc/arm/sys/ptrace.S
View File

@ -1,51 +0,0 @@
/* $NetBSD: ptrace.S,v 1.7 2003/08/07 16:42:04 agc Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: @(#)ptrace.s 5.1 (Berkeley) 4/23/90
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
ENTRY(ptrace)
stmfd sp!, {r0-r3, lr}
sub sp, sp, #4 /* align stack */
bl PIC_SYM(_C_LABEL(__error), PLT)
add sp, sp, #4 /* unalign stack */
mov r1, #0x00000000
str r1, [r0]
ldmfd sp!, {r0-r3, lr}
SYSTRAP(ptrace)
bcs PIC_SYM(CERROR, PLT)
RET
END(ptrace)
.section .note.GNU-stack,"",%progbits

2
lib/libc/i386/sys/Makefile.inc
View File

@ -7,7 +7,7 @@ SRCS+= i386_clr_watch.c i386_set_watch.c i386_vm86.c
SRCS+= i386_get_fsbase.c i386_get_gsbase.c i386_get_ioperm.c i386_get_ldt.c \
i386_set_fsbase.c i386_set_gsbase.c i386_set_ioperm.c i386_set_ldt.c
MDASM= Ovfork.S brk.S cerror.S exect.S getcontext.S ptrace.S \
MDASM= Ovfork.S brk.S cerror.S exect.S getcontext.S \
sbrk.S setlogin.S sigreturn.S syscall.S
# Don't generate default code for these syscalls:

59
lib/libc/i386/sys/ptrace.S
View File

@ -1,59 +0,0 @@
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(SYSLIBC_SCCS) && !defined(lint)
.asciz "@(#)ptrace.s 5.1 (Berkeley) 4/23/90"
#endif /* SYSLIBC_SCCS and not lint */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
.globl CNAME(__error)
.type CNAME(__error),@function
ENTRY(ptrace)
#ifdef PIC
PIC_PROLOGUE
call PIC_PLT(CNAME(__error))
PIC_EPILOGUE
#else
call CNAME(__error)
#endif
movl $0,(%eax)
mov $SYS_ptrace,%eax
KERNCALL
jb HIDENAME(cerror)
ret
END(ptrace)
.section .note.GNU-stack,"",%progbits

1
lib/libc/include/libc_private.h
View File

@ -335,6 +335,7 @@ int __sys_openat(int, const char *, int, ...);
int __sys_pselect(int, struct fd_set *, struct fd_set *,
struct fd_set *, const struct timespec *,
const __sigset_t *);
int __sys_ptrace(int, __pid_t, char *, int);
int __sys_poll(struct pollfd *, unsigned, int);
int __sys_ppoll(struct pollfd *, unsigned, const struct timespec *,
const __sigset_t *);

2
lib/libc/mips/sys/Makefile.inc
View File

@ -3,7 +3,7 @@
SRCS+= trivial-vdso_tc.c
MDASM= Ovfork.S brk.S cerror.S exect.S \
ptrace.S sbrk.S syscall.S
sbrk.S syscall.S
# Don't generate default code for these syscalls:
NOASM= break.o exit.o getlogin.o sstk.o vfork.o yield.o

71
lib/libc/mips/sys/ptrace.S
View File

@ -1,71 +0,0 @@
/* $NetBSD: ptrace.S,v 1.9 2003/08/07 16:42:17 agc Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
#if defined(LIBC_SCCS) && !defined(lint)
ASMSTR("from: @(#)ptrace.s 8.1 (Berkeley) 6/4/93")
ASMSTR("$NetBSD: ptrace.S,v 1.9 2003/08/07 16:42:17 agc Exp $")
#endif /* LIBC_SCCS and not lint */
NESTED_NOPROFILE(ptrace, CALLFRAME_SIZ, ra)
.mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
SETUP_GP
PTR_SUBU sp, sp, CALLFRAME_SIZ
SETUP_GP64(CALLFRAME_GP, ptrace)
SAVE_GP(CALLFRAME_GP)
PTR_S ra, CALLFRAME_RA(sp)
PTR_LA t9, _C_LABEL(__error) # locate address of errno
jalr t9
PTR_L ra, CALLFRAME_RA(sp)
INT_S zero, 0(v0) # update errno value
li v0, SYS_ptrace
syscall
# Load __cerror's address using our gp, then restore it.
PTR_LA t9, __cerror
RESTORE_GP64
PTR_ADDU sp, sp, CALLFRAME_SIZ
bne a3, zero, 1f
j ra
1: j t9
END(ptrace)

2
lib/libc/powerpc/sys/Makefile.inc
View File

@ -1,6 +1,6 @@
# $FreeBSD$
MDASM+= brk.S cerror.S exect.S ptrace.S sbrk.S setlogin.S
MDASM+= brk.S cerror.S exect.S sbrk.S setlogin.S
# Don't generate default code for these syscalls:
NOASM= break.o exit.o getlogin.o sstk.o yield.o

61
lib/libc/powerpc/sys/ptrace.S
View File

@ -1,61 +0,0 @@
/*-
* Copyright (c) 2002 Peter Grehan.
* 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.
*/
/* $NetBSD: ptrace.S,v 1.3 2000/02/23 20:16:57 kleink Exp $ */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
ENTRY(ptrace)
mflr %r0
stwu %r1,-32(%r1)
stw %r0,36(%r1)
stw %r3,8(%r1)
stw %r4,12(%r1)
stw %r5,16(%r1)
stw %r6,20(%r1)
bl PIC_PLT(CNAME(__error))
li %r7,0
stw %r7,0(%r3)
lwz %r3,8(%r1)
lwz %r4,12(%r1)
lwz %r5,16(%r1)
lwz %r0,36(%r1)
lwz %r6,20(%r1)
mtlr %r0
la %r1,32(%r1)
li %r0,SYS_ptrace
sc
bso 1f
blr
1:
b PIC_PLT(HIDENAME(cerror))
END(ptrace)
.section .note.GNU-stack,"",%progbits

2
lib/libc/powerpc64/sys/Makefile.inc
View File

@ -1,6 +1,6 @@
# $FreeBSD$
MDASM+= brk.S cerror.S exect.S ptrace.S sbrk.S setlogin.S
MDASM+= brk.S cerror.S exect.S sbrk.S setlogin.S
# Don't generate default code for these syscalls:
NOASM= break.o exit.o getlogin.o sstk.o yield.o

68
lib/libc/powerpc64/sys/ptrace.S
View File

@ -1,68 +0,0 @@
/*-
* Copyright (c) 2002 Peter Grehan.
* 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.
*/
/* $NetBSD: ptrace.S,v 1.3 2000/02/23 20:16:57 kleink Exp $ */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
ENTRY(ptrace)
mflr %r0
std %r0,16(%r1)
stdu %r1,-80(%r1)
stw %r3,48(%r1)
stw %r4,52(%r1)
std %r5,56(%r1)
stw %r6,64(%r1)
bl CNAME(__error)
nop
li %r7,0
stw %r7,0(%r3)
lwz %r3,48(%r1)
lwz %r4,52(%r1)
ld %r5,56(%r1)
lwz %r6,64(%r1)
ld %r1,0(%r1)
ld %r0,16(%r1)
mtlr %r0
li %r0,SYS_ptrace
sc
bso 1f
blr
1:
stdu %r1,-48(%r1) /* lr already saved */
bl HIDENAME(cerror)
nop
ld %r1,0(%r1)
ld %r0,16(%r1)
mtlr %r0
blr
END(ptrace)
.section .note.GNU-stack,"",%progbits

2
lib/libc/sparc64/sys/Makefile.inc
View File

@ -12,7 +12,7 @@ SRCS+= __sparc_sigtramp_setup.c \
CFLAGS+= -I${LIBC_SRCTOP}/sparc64/fpu
MDASM+= brk.S cerror.S exect.S ptrace.S sbrk.S setlogin.S sigaction1.S
MDASM+= brk.S cerror.S exect.S sbrk.S setlogin.S sigaction1.S
# Don't generate default code for these syscalls:
NOASM= break.o exit.o getlogin.o sstk.o yield.o

57
lib/libc/sparc64/sys/ptrace.S
View File

@ -1,57 +0,0 @@
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: Header: ptrace.s,v 1.2 91/12/20 01:59:00 leres Exp
* from: NetBSD: ptrace.S,v 1.4 2000/07/24 00:11:10 mycroft Exp
*/
#if defined(SYSLIBC_SCCS) && !defined(lint)
.asciz "@(#)ptrace.s 8.1 (Berkeley) 6/4/93"
#if 0
RCSID("$NetBSD: ptrace.S,v 1.4 2000/07/24 00:11:10 mycroft Exp $")
#endif
#endif /* SYSLIBC_SCCS and not lint */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
_SYSENTRY(ptrace)
save %sp, -CCFSZ, %sp
call CNAME(__error)
nop
stw %g0, [%o0]
restore
_SYSCALL(ptrace)
retl
nop
_SYSEND(ptrace)

1
lib/libc/sys/Makefile.inc
View File

@ -48,6 +48,7 @@ INTERPOSED = \
poll \
ppoll \
pselect \
ptrace \
read \
readv \
recvfrom \

49
lib/libc/sys/ptrace.c Normal file
View File

@ -0,0 +1,49 @@
/*
* Copyright (c) 2016 The FreeBSD Foundation.
* All rights reserved.
*
* Portions of this software were developed by Konstantin Belousov
* under sponsorship from the FreeBSD Foundation.
*
* 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(s), this list of conditions and the following disclaimer as
* the first lines of this file unmodified other than the possible
* addition of one or more copyright notices.
* 2. Redistributions in binary form must reproduce the above copyright
* notice(s), 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 COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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/types.h>
#include <sys/ptrace.h>
#include <errno.h>
#include "libc_private.h"
__weak_reference(_ptrace, ptrace);
int
_ptrace(int request, pid_t pid, caddr_t addr, int data)
{
errno = 0;
return (__sys_ptrace(request, pid, addr, data));
}