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valgrind.h
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/* -*- c -*-
----------------------------------------------------------------
Notice that the following BSD-style license applies to this one
file (valgrind.h) only. The rest of Valgrind is licensed under the
terms of the GNU General Public License, version 2, unless
otherwise indicated. See the COPYING file in the source
distribution for details.
----------------------------------------------------------------
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2011 Julian Seward. 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. The origin of this software must not be misrepresented; you must
not claim that you wrote the original software. If you use this
software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
3. Altered source versions must be plainly marked as such, and must
not be misrepresented as being the original software.
4. The name of the author may not be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
----------------------------------------------------------------
Notice that the above BSD-style license applies to this one file
(valgrind.h) only. The entire rest of Valgrind is licensed under
the terms of the GNU General Public License, version 2. See the
COPYING file in the source distribution for details.
----------------------------------------------------------------
*/
/* This file is for inclusion into client (your!) code.
You can use these macros to manipulate and query Valgrind's
execution inside your own programs.
The resulting executables will still run without Valgrind, just a
little bit more slowly than they otherwise would, but otherwise
unchanged. When not running on valgrind, each client request
consumes very few (eg. 7) instructions, so the resulting performance
loss is negligible unless you plan to execute client requests
millions of times per second. Nevertheless, if that is still a
problem, you can compile with the NVALGRIND symbol defined (gcc
-DNVALGRIND) so that client requests are not even compiled in. */
#ifndef __VALGRIND_H
#define __VALGRIND_H
/* ------------------------------------------------------------------ */
/* VERSION NUMBER OF VALGRIND */
/* ------------------------------------------------------------------ */
/* Specify Valgrind's version number, so that user code can
conditionally compile based on our version number. Note that these
were introduced at version 3.6 and so do not exist in version 3.5
or earlier. The recommended way to use them to check for "version
X.Y or later" is (eg)
#if defined(__VALGRIND_MAJOR__) && defined(__VALGRIND_MINOR__) \
&& (__VALGRIND_MAJOR__ > 3 \
|| (__VALGRIND_MAJOR__ == 3 && __VALGRIND_MINOR__ >= 6))
*/
#define __VALGRIND_MAJOR__ 3
#define __VALGRIND_MINOR__ 6
#include <stdarg.h>
/* Nb: this file might be included in a file compiled with -ansi. So
we can't use C++ style "//" comments nor the "asm" keyword (instead
use "__asm__"). */
/* Derive some tags indicating what the target platform is. Note
that in this file we're using the compiler's CPP symbols for
identifying architectures, which are different to the ones we use
within the rest of Valgrind. Note, __powerpc__ is active for both
32 and 64-bit PPC, whereas __powerpc64__ is only active for the
latter (on Linux, that is).
Misc note: how to find out what's predefined in gcc by default:
gcc -Wp,-dM somefile.c
*/
#undef PLAT_x86_darwin
#undef PLAT_amd64_darwin
#undef PLAT_x86_win32
#undef PLAT_x86_linux
#undef PLAT_amd64_linux
#undef PLAT_ppc32_linux
#undef PLAT_ppc64_linux
#undef PLAT_arm_linux
#undef PLAT_s390x_linux
#if defined(__APPLE__) && defined(__i386__)
# define PLAT_x86_darwin 1
#elif defined(__APPLE__) && defined(__x86_64__)
# define PLAT_amd64_darwin 1
#elif defined(__MINGW32__) || defined(__CYGWIN32__) \
|| (defined(_WIN32) && defined(_M_IX86))
# define PLAT_x86_win32 1
#elif defined(__linux__) && defined(__i386__)
# define PLAT_x86_linux 1
#elif defined(__linux__) && defined(__x86_64__)
# define PLAT_amd64_linux 1
#elif defined(__linux__) && defined(__powerpc__) && !defined(__powerpc64__)
# define PLAT_ppc32_linux 1
#elif defined(__linux__) && defined(__powerpc__) && defined(__powerpc64__)
# define PLAT_ppc64_linux 1
#elif defined(__linux__) && defined(__arm__)
# define PLAT_arm_linux 1
#elif defined(__linux__) && defined(__s390__) && defined(__s390x__)
# define PLAT_s390x_linux 1
#else
/* If we're not compiling for our target platform, don't generate
any inline asms. */
# if !defined(NVALGRIND)
# define NVALGRIND 1
# endif
#endif
/* ------------------------------------------------------------------ */
/* ARCHITECTURE SPECIFICS for SPECIAL INSTRUCTIONS. There is nothing */
/* in here of use to end-users -- skip to the next section. */
/* ------------------------------------------------------------------ */
/*
* VALGRIND_DO_CLIENT_REQUEST(): a statement that invokes a Valgrind client
* request. Accepts both pointers and integers as arguments.
*
* VALGRIND_DO_CLIENT_REQUEST_STMT(): a statement that invokes a Valgrind
* client request that does not return a value.
* VALGRIND_DO_CLIENT_REQUEST_EXPR(): a C expression that invokes a Valgrind
* client request and whose value equals the client request result. Accepts
* both pointers and integers as arguments. Note that such calls are not
* necessarily pure functions -- they may have side effects.
*/
#define VALGRIND_DO_CLIENT_REQUEST(_zzq_rlval, _zzq_default, \
_zzq_request, _zzq_arg1, _zzq_arg2, \
_zzq_arg3, _zzq_arg4, _zzq_arg5) \
do { (_zzq_rlval) = VALGRIND_DO_CLIENT_REQUEST_EXPR((_zzq_default), \
(_zzq_request), (_zzq_arg1), (_zzq_arg2), \
(_zzq_arg3), (_zzq_arg4), (_zzq_arg5)); } while (0)
#define VALGRIND_DO_CLIENT_REQUEST_STMT(_zzq_request, _zzq_arg1, \
_zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
do { (void) VALGRIND_DO_CLIENT_REQUEST_EXPR(0, \
(_zzq_request), (_zzq_arg1), (_zzq_arg2), \
(_zzq_arg3), (_zzq_arg4), (_zzq_arg5)); } while (0)
#if defined(NVALGRIND)
/* Define NVALGRIND to completely remove the Valgrind magic sequence
from the compiled code (analogous to NDEBUG's effects on
assert()) */
#define VALGRIND_DO_CLIENT_REQUEST_EXPR( \
_zzq_default, _zzq_request, \
_zzq_arg1, _zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
(_zzq_default)
#else /* ! NVALGRIND */
/* The following defines the magic code sequences which the JITter
spots and handles magically. Don't look too closely at them as
they will rot your brain.
The assembly code sequences for all architectures is in this one
file. This is because this file must be stand-alone, and we don't
want to have multiple files.
For VALGRIND_DO_CLIENT_REQUEST, we must ensure that the default
value gets put in the return slot, so that everything works when
this is executed not under Valgrind. Args are passed in a memory
block, and so there's no intrinsic limit to the number that could
be passed, but it's currently five.
The macro args are:
_zzq_rlval result lvalue
_zzq_default default value (result returned when running on real CPU)
_zzq_request request code
_zzq_arg1..5 request params
The other two macros are used to support function wrapping, and are
a lot simpler. VALGRIND_GET_NR_CONTEXT returns the value of the
guest's NRADDR pseudo-register and whatever other information is
needed to safely run the call original from the wrapper: on
ppc64-linux, the R2 value at the divert point is also needed. This
information is abstracted into a user-visible type, OrigFn.
VALGRIND_CALL_NOREDIR_* behaves the same as the following on the
guest, but guarantees that the branch instruction will not be
redirected: x86: call *%eax, amd64: call *%rax, ppc32/ppc64:
branch-and-link-to-r11. VALGRIND_CALL_NOREDIR is just text, not a
complete inline asm, since it needs to be combined with more magic
inline asm stuff to be useful.
*/
/* ------------------------- x86-{linux,darwin} ---------------- */
#if defined(PLAT_x86_linux) || defined(PLAT_x86_darwin) \
|| (defined(PLAT_x86_win32) && defined(__GNUC__))
typedef
struct {
unsigned int nraddr; /* where's the code? */
}
OrigFn;
#define __SPECIAL_INSTRUCTION_PREAMBLE \
"roll $3, %%edi ; roll $13, %%edi\n\t" \
"roll $29, %%edi ; roll $19, %%edi\n\t"
#define VALGRIND_DO_CLIENT_REQUEST_EXPR( \
_zzq_default, _zzq_request, \
_zzq_arg1, _zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
__extension__ \
({volatile unsigned int _zzq_args[6]; \
volatile unsigned int _zzq_result; \
_zzq_args[0] = (unsigned int)(_zzq_request); \
_zzq_args[1] = (unsigned int)(_zzq_arg1); \
_zzq_args[2] = (unsigned int)(_zzq_arg2); \
_zzq_args[3] = (unsigned int)(_zzq_arg3); \
_zzq_args[4] = (unsigned int)(_zzq_arg4); \
_zzq_args[5] = (unsigned int)(_zzq_arg5); \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
/* %EDX = client_request ( %EAX ) */ \
"xchgl %%ebx,%%ebx" \
: "=d" (_zzq_result) \
: "a" (&_zzq_args[0]), "0" (_zzq_default) \
: "cc", "memory" \
); \
_zzq_result; \
})
#define VALGRIND_GET_NR_CONTEXT(_zzq_rlval) \
{ volatile OrigFn* _zzq_orig = &(_zzq_rlval); \
volatile unsigned int __addr; \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
/* %EAX = guest_NRADDR */ \
"xchgl %%ecx,%%ecx" \
: "=a" (__addr) \
: \
: "cc", "memory" \
); \
_zzq_orig->nraddr = __addr; \
}
#define VALGRIND_CALL_NOREDIR_EAX \
__SPECIAL_INSTRUCTION_PREAMBLE \
/* call-noredir *%EAX */ \
"xchgl %%edx,%%edx\n\t"
#endif /* PLAT_x86_linux || PLAT_x86_darwin || (PLAT_x86_win32 && __GNUC__) */
/* ------------------------- x86-Win32 ------------------------- */
#if defined(PLAT_x86_win32) && !defined(__GNUC__)
typedef
struct {
unsigned int nraddr; /* where's the code? */
}
OrigFn;
#if defined(_MSC_VER)
#define __SPECIAL_INSTRUCTION_PREAMBLE \
__asm rol edi, 3 __asm rol edi, 13 \
__asm rol edi, 29 __asm rol edi, 19
#define VALGRIND_DO_CLIENT_REQUEST_EXPR( \
_zzq_default, _zzq_request, \
_zzq_arg1, _zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
valgrind_do_client_request_expr((uintptr_t)(_zzq_default), \
(uintptr_t)(_zzq_request), (uintptr_t)(_zzq_arg1), \
(uintptr_t)(_zzq_arg2), (uintptr_t)(_zzq_arg3), \
(uintptr_t)(_zzq_arg4), (uintptr_t)(_zzq_arg5))
static __inline uintptr_t
valgrind_do_client_request_expr(uintptr_t _zzq_default, uintptr_t _zzq_request,
uintptr_t _zzq_arg1, uintptr_t _zzq_arg2,
uintptr_t _zzq_arg3, uintptr_t _zzq_arg4,
uintptr_t _zzq_arg5)
{
volatile uintptr_t _zzq_args[6];
volatile unsigned int _zzq_result;
_zzq_args[0] = (uintptr_t)(_zzq_request);
_zzq_args[1] = (uintptr_t)(_zzq_arg1);
_zzq_args[2] = (uintptr_t)(_zzq_arg2);
_zzq_args[3] = (uintptr_t)(_zzq_arg3);
_zzq_args[4] = (uintptr_t)(_zzq_arg4);
_zzq_args[5] = (uintptr_t)(_zzq_arg5);
__asm { __asm lea eax, _zzq_args __asm mov edx, _zzq_default
__SPECIAL_INSTRUCTION_PREAMBLE
/* %EDX = client_request ( %EAX ) */
__asm xchg ebx,ebx
__asm mov _zzq_result, edx
}
return _zzq_result;
}
#define VALGRIND_GET_NR_CONTEXT(_zzq_rlval) \
{ volatile OrigFn* _zzq_orig = &(_zzq_rlval); \
volatile unsigned int __addr; \
__asm { __SPECIAL_INSTRUCTION_PREAMBLE \
/* %EAX = guest_NRADDR */ \
__asm xchg ecx,ecx \
__asm mov __addr, eax \
} \
_zzq_orig->nraddr = __addr; \
}
#define VALGRIND_CALL_NOREDIR_EAX ERROR
#else
#error Unsupported compiler.
#endif
#endif /* PLAT_x86_win32 */
/* ------------------------ amd64-{linux,darwin} --------------- */
#if defined(PLAT_amd64_linux) || defined(PLAT_amd64_darwin)
typedef
struct {
unsigned long long int nraddr; /* where's the code? */
}
OrigFn;
#define __SPECIAL_INSTRUCTION_PREAMBLE \
"rolq $3, %%rdi ; rolq $13, %%rdi\n\t" \
"rolq $61, %%rdi ; rolq $51, %%rdi\n\t"
#define VALGRIND_DO_CLIENT_REQUEST_EXPR( \
_zzq_default, _zzq_request, \
_zzq_arg1, _zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
__extension__ \
({ volatile unsigned long long int _zzq_args[6]; \
volatile unsigned long long int _zzq_result; \
_zzq_args[0] = (unsigned long long int)(_zzq_request); \
_zzq_args[1] = (unsigned long long int)(_zzq_arg1); \
_zzq_args[2] = (unsigned long long int)(_zzq_arg2); \
_zzq_args[3] = (unsigned long long int)(_zzq_arg3); \
_zzq_args[4] = (unsigned long long int)(_zzq_arg4); \
_zzq_args[5] = (unsigned long long int)(_zzq_arg5); \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
/* %RDX = client_request ( %RAX ) */ \
"xchgq %%rbx,%%rbx" \
: "=d" (_zzq_result) \
: "a" (&_zzq_args[0]), "0" (_zzq_default) \
: "cc", "memory" \
); \
_zzq_result; \
})
#define VALGRIND_GET_NR_CONTEXT(_zzq_rlval) \
{ volatile OrigFn* _zzq_orig = &(_zzq_rlval); \
volatile unsigned long long int __addr; \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
/* %RAX = guest_NRADDR */ \
"xchgq %%rcx,%%rcx" \
: "=a" (__addr) \
: \
: "cc", "memory" \
); \
_zzq_orig->nraddr = __addr; \
}
#define VALGRIND_CALL_NOREDIR_RAX \
__SPECIAL_INSTRUCTION_PREAMBLE \
/* call-noredir *%RAX */ \
"xchgq %%rdx,%%rdx\n\t"
#endif /* PLAT_amd64_linux || PLAT_amd64_darwin */
/* ------------------------ ppc32-linux ------------------------ */
#if defined(PLAT_ppc32_linux)
typedef
struct {
unsigned int nraddr; /* where's the code? */
}
OrigFn;
#define __SPECIAL_INSTRUCTION_PREAMBLE \
"rlwinm 0,0,3,0,0 ; rlwinm 0,0,13,0,0\n\t" \
"rlwinm 0,0,29,0,0 ; rlwinm 0,0,19,0,0\n\t"
#define VALGRIND_DO_CLIENT_REQUEST_EXPR( \
_zzq_default, _zzq_request, \
_zzq_arg1, _zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
\
__extension__ \
({ unsigned int _zzq_args[6]; \
unsigned int _zzq_result; \
unsigned int* _zzq_ptr; \
_zzq_args[0] = (unsigned int)(_zzq_request); \
_zzq_args[1] = (unsigned int)(_zzq_arg1); \
_zzq_args[2] = (unsigned int)(_zzq_arg2); \
_zzq_args[3] = (unsigned int)(_zzq_arg3); \
_zzq_args[4] = (unsigned int)(_zzq_arg4); \
_zzq_args[5] = (unsigned int)(_zzq_arg5); \
_zzq_ptr = _zzq_args; \
__asm__ volatile("mr 3,%1\n\t" /*default*/ \
"mr 4,%2\n\t" /*ptr*/ \
__SPECIAL_INSTRUCTION_PREAMBLE \
/* %R3 = client_request ( %R4 ) */ \
"or 1,1,1\n\t" \
"mr %0,3" /*result*/ \
: "=b" (_zzq_result) \
: "b" (_zzq_default), "b" (_zzq_ptr) \
: "cc", "memory", "r3", "r4"); \
_zzq_result; \
})
#define VALGRIND_GET_NR_CONTEXT(_zzq_rlval) \
{ volatile OrigFn* _zzq_orig = &(_zzq_rlval); \
unsigned int __addr; \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
/* %R3 = guest_NRADDR */ \
"or 2,2,2\n\t" \
"mr %0,3" \
: "=b" (__addr) \
: \
: "cc", "memory", "r3" \
); \
_zzq_orig->nraddr = __addr; \
}
#define VALGRIND_BRANCH_AND_LINK_TO_NOREDIR_R11 \
__SPECIAL_INSTRUCTION_PREAMBLE \
/* branch-and-link-to-noredir *%R11 */ \
"or 3,3,3\n\t"
#endif /* PLAT_ppc32_linux */
/* ------------------------ ppc64-linux ------------------------ */
#if defined(PLAT_ppc64_linux)
typedef
struct {
unsigned long long int nraddr; /* where's the code? */
unsigned long long int r2; /* what tocptr do we need? */
}
OrigFn;
#define __SPECIAL_INSTRUCTION_PREAMBLE \
"rotldi 0,0,3 ; rotldi 0,0,13\n\t" \
"rotldi 0,0,61 ; rotldi 0,0,51\n\t"
#define VALGRIND_DO_CLIENT_REQUEST_EXPR( \
_zzq_default, _zzq_request, \
_zzq_arg1, _zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
\
__extension__ \
({ unsigned long long int _zzq_args[6]; \
unsigned long long int _zzq_result; \
unsigned long long int* _zzq_ptr; \
_zzq_args[0] = (unsigned long long int)(_zzq_request); \
_zzq_args[1] = (unsigned long long int)(_zzq_arg1); \
_zzq_args[2] = (unsigned long long int)(_zzq_arg2); \
_zzq_args[3] = (unsigned long long int)(_zzq_arg3); \
_zzq_args[4] = (unsigned long long int)(_zzq_arg4); \
_zzq_args[5] = (unsigned long long int)(_zzq_arg5); \
_zzq_ptr = _zzq_args; \
__asm__ volatile("mr 3,%1\n\t" /*default*/ \
"mr 4,%2\n\t" /*ptr*/ \
__SPECIAL_INSTRUCTION_PREAMBLE \
/* %R3 = client_request ( %R4 ) */ \
"or 1,1,1\n\t" \
"mr %0,3" /*result*/ \
: "=b" (_zzq_result) \
: "b" (_zzq_default), "b" (_zzq_ptr) \
: "cc", "memory", "r3", "r4"); \
_zzq_result; \
})
#define VALGRIND_GET_NR_CONTEXT(_zzq_rlval) \
{ volatile OrigFn* _zzq_orig = &(_zzq_rlval); \
unsigned long long int __addr; \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
/* %R3 = guest_NRADDR */ \
"or 2,2,2\n\t" \
"mr %0,3" \
: "=b" (__addr) \
: \
: "cc", "memory", "r3" \
); \
_zzq_orig->nraddr = __addr; \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
/* %R3 = guest_NRADDR_GPR2 */ \
"or 4,4,4\n\t" \
"mr %0,3" \
: "=b" (__addr) \
: \
: "cc", "memory", "r3" \
); \
_zzq_orig->r2 = __addr; \
}
#define VALGRIND_BRANCH_AND_LINK_TO_NOREDIR_R11 \
__SPECIAL_INSTRUCTION_PREAMBLE \
/* branch-and-link-to-noredir *%R11 */ \
"or 3,3,3\n\t"
#endif /* PLAT_ppc64_linux */
/* ------------------------- arm-linux ------------------------- */
#if defined(PLAT_arm_linux)
typedef
struct {
unsigned int nraddr; /* where's the code? */
}
OrigFn;
#define __SPECIAL_INSTRUCTION_PREAMBLE \
"mov r12, r12, ror #3 ; mov r12, r12, ror #13 \n\t" \
"mov r12, r12, ror #29 ; mov r12, r12, ror #19 \n\t"
#define VALGRIND_DO_CLIENT_REQUEST_EXPR( \
_zzq_default, _zzq_request, \
_zzq_arg1, _zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
\
__extension__ \
({volatile unsigned int _zzq_args[6]; \
volatile unsigned int _zzq_result; \
_zzq_args[0] = (unsigned int)(_zzq_request); \
_zzq_args[1] = (unsigned int)(_zzq_arg1); \
_zzq_args[2] = (unsigned int)(_zzq_arg2); \
_zzq_args[3] = (unsigned int)(_zzq_arg3); \
_zzq_args[4] = (unsigned int)(_zzq_arg4); \
_zzq_args[5] = (unsigned int)(_zzq_arg5); \
__asm__ volatile("mov r3, %1\n\t" /*default*/ \
"mov r4, %2\n\t" /*ptr*/ \
__SPECIAL_INSTRUCTION_PREAMBLE \
/* R3 = client_request ( R4 ) */ \
"orr r10, r10, r10\n\t" \
"mov %0, r3" /*result*/ \
: "=r" (_zzq_result) \
: "r" (_zzq_default), "r" (&_zzq_args[0]) \
: "cc","memory", "r3", "r4"); \
_zzq_result; \
})
#define VALGRIND_GET_NR_CONTEXT(_zzq_rlval) \
{ volatile OrigFn* _zzq_orig = &(_zzq_rlval); \
unsigned int __addr; \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
/* R3 = guest_NRADDR */ \
"orr r11, r11, r11\n\t" \
"mov %0, r3" \
: "=r" (__addr) \
: \
: "cc", "memory", "r3" \
); \
_zzq_orig->nraddr = __addr; \
}
#define VALGRIND_BRANCH_AND_LINK_TO_NOREDIR_R4 \
__SPECIAL_INSTRUCTION_PREAMBLE \
/* branch-and-link-to-noredir *%R4 */ \
"orr r12, r12, r12\n\t"
#endif /* PLAT_arm_linux */
/* ------------------------ s390x-linux ------------------------ */
#if defined(PLAT_s390x_linux)
typedef
struct {
unsigned long long int nraddr; /* where's the code? */
}
OrigFn;
/* __SPECIAL_INSTRUCTION_PREAMBLE will be used to identify Valgrind specific
* code. This detection is implemented in platform specific toIR.c
* (e.g. VEX/priv/guest_s390_decoder.c).
*/
#define __SPECIAL_INSTRUCTION_PREAMBLE \
"lr 15,15\n\t" \
"lr 1,1\n\t" \
"lr 2,2\n\t" \
"lr 3,3\n\t"
#define __CLIENT_REQUEST_CODE "lr 2,2\n\t"
#define __GET_NR_CONTEXT_CODE "lr 3,3\n\t"
#define __CALL_NO_REDIR_CODE "lr 4,4\n\t"
#define VALGRIND_DO_CLIENT_REQUEST_EXPR( \
_zzq_default, _zzq_request, \
_zzq_arg1, _zzq_arg2, _zzq_arg3, _zzq_arg4, _zzq_arg5) \
__extension__ \
({volatile unsigned long long int _zzq_args[6]; \
volatile unsigned long long int _zzq_result; \
_zzq_args[0] = (unsigned long long int)(_zzq_request); \
_zzq_args[1] = (unsigned long long int)(_zzq_arg1); \
_zzq_args[2] = (unsigned long long int)(_zzq_arg2); \
_zzq_args[3] = (unsigned long long int)(_zzq_arg3); \
_zzq_args[4] = (unsigned long long int)(_zzq_arg4); \
_zzq_args[5] = (unsigned long long int)(_zzq_arg5); \
__asm__ volatile(/* r2 = args */ \
"lgr 2,%1\n\t" \
/* r3 = default */ \
"lgr 3,%2\n\t" \
__SPECIAL_INSTRUCTION_PREAMBLE \
__CLIENT_REQUEST_CODE \
/* results = r3 */ \
"lgr %0, 3\n\t" \
: "=d" (_zzq_result) \
: "a" (&_zzq_args[0]), "0" (_zzq_default) \
: "cc", "2", "3", "memory" \
); \
_zzq_result; \
})
#define VALGRIND_GET_NR_CONTEXT(_zzq_rlval) \
{ volatile OrigFn* _zzq_orig = &(_zzq_rlval); \
volatile unsigned long long int __addr; \
__asm__ volatile(__SPECIAL_INSTRUCTION_PREAMBLE \
__GET_NR_CONTEXT_CODE \
"lgr %0, 3\n\t" \
: "=a" (__addr) \
: \
: "cc", "3", "memory" \
); \
_zzq_orig->nraddr = __addr; \
}
#define VALGRIND_CALL_NOREDIR_R1 \
__SPECIAL_INSTRUCTION_PREAMBLE \
__CALL_NO_REDIR_CODE
#endif /* PLAT_s390x_linux */
/* Insert assembly code for other platforms here... */
#endif /* NVALGRIND */
/* ------------------------------------------------------------------ */
/* PLATFORM SPECIFICS for FUNCTION WRAPPING. This is all very */
/* ugly. It's the least-worst tradeoff I can think of. */
/* ------------------------------------------------------------------ */
/* This section defines magic (a.k.a appalling-hack) macros for doing
guaranteed-no-redirection macros, so as to get from function
wrappers to the functions they are wrapping. The whole point is to
construct standard call sequences, but to do the call itself with a
special no-redirect call pseudo-instruction that the JIT
understands and handles specially. This section is long and
repetitious, and I can't see a way to make it shorter.
The naming scheme is as follows:
CALL_FN_{W,v}_{v,W,WW,WWW,WWWW,5W,6W,7W,etc}
'W' stands for "word" and 'v' for "void". Hence there are
different macros for calling arity 0, 1, 2, 3, 4, etc, functions,
and for each, the possibility of returning a word-typed result, or
no result.
*/
/* Use these to write the name of your wrapper. NOTE: duplicates
VG_WRAP_FUNCTION_Z{U,Z} in pub_tool_redir.h. NOTE also: inserts
the default behaviour equivalance class tag "0000" into the name.
See pub_tool_redir.h for details -- normally you don't need to
think about this, though. */
/* Use an extra level of macroisation so as to ensure the soname/fnname
args are fully macro-expanded before pasting them together. */
#define VG_CONCAT4(_aa,_bb,_cc,_dd) _aa##_bb##_cc##_dd
#define I_WRAP_SONAME_FNNAME_ZU(soname,fnname) \
VG_CONCAT4(_vgw00000ZU_,soname,_,fnname)
#define I_WRAP_SONAME_FNNAME_ZZ(soname,fnname) \
VG_CONCAT4(_vgw00000ZZ_,soname,_,fnname)
/* Use this macro from within a wrapper function to collect the
context (address and possibly other info) of the original function.
Once you have that you can then use it in one of the CALL_FN_
macros. The type of the argument _lval is OrigFn. */
#define VALGRIND_GET_ORIG_FN(_lval) VALGRIND_GET_NR_CONTEXT(_lval)
/* Derivatives of the main macros below, for calling functions
returning void. */
#define CALL_FN_v_v(fnptr) \
do { volatile unsigned long _junk; \
CALL_FN_W_v(_junk,fnptr); } while (0)
#define CALL_FN_v_W(fnptr, arg1) \
do { volatile unsigned long _junk; \
CALL_FN_W_W(_junk,fnptr,arg1); } while (0)
#define CALL_FN_v_WW(fnptr, arg1,arg2) \
do { volatile unsigned long _junk; \
CALL_FN_W_WW(_junk,fnptr,arg1,arg2); } while (0)
#define CALL_FN_v_WWW(fnptr, arg1,arg2,arg3) \
do { volatile unsigned long _junk; \
CALL_FN_W_WWW(_junk,fnptr,arg1,arg2,arg3); } while (0)
#define CALL_FN_v_WWWW(fnptr, arg1,arg2,arg3,arg4) \
do { volatile unsigned long _junk; \
CALL_FN_W_WWWW(_junk,fnptr,arg1,arg2,arg3,arg4); } while (0)
#define CALL_FN_v_5W(fnptr, arg1,arg2,arg3,arg4,arg5) \
do { volatile unsigned long _junk; \
CALL_FN_W_5W(_junk,fnptr,arg1,arg2,arg3,arg4,arg5); } while (0)
#define CALL_FN_v_6W(fnptr, arg1,arg2,arg3,arg4,arg5,arg6) \
do { volatile unsigned long _junk; \
CALL_FN_W_6W(_junk,fnptr,arg1,arg2,arg3,arg4,arg5,arg6); } while (0)
#define CALL_FN_v_7W(fnptr, arg1,arg2,arg3,arg4,arg5,arg6,arg7) \
do { volatile unsigned long _junk; \
CALL_FN_W_7W(_junk,fnptr,arg1,arg2,arg3,arg4,arg5,arg6,arg7); } while (0)
/* ------------------------- x86-{linux,darwin} ---------------- */
#if defined(PLAT_x86_linux) || defined(PLAT_x86_darwin)
/* These regs are trashed by the hidden call. No need to mention eax
as gcc can already see that, plus causes gcc to bomb. */
#define __CALLER_SAVED_REGS /*"eax"*/ "ecx", "edx"
/* These CALL_FN_ macros assume that on x86-linux, sizeof(unsigned
long) == 4. */
#define CALL_FN_W_v(lval, orig) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[1]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
__asm__ volatile( \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_W(lval, orig, arg1) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[2]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
_argvec[1] = (unsigned long)(arg1); \
__asm__ volatile( \
"subl $12, %%esp\n\t" \
"pushl 4(%%eax)\n\t" \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
"addl $16, %%esp\n" \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_WW(lval, orig, arg1,arg2) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[3]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
_argvec[1] = (unsigned long)(arg1); \
_argvec[2] = (unsigned long)(arg2); \
__asm__ volatile( \
"subl $8, %%esp\n\t" \
"pushl 8(%%eax)\n\t" \
"pushl 4(%%eax)\n\t" \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
"addl $16, %%esp\n" \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_WWW(lval, orig, arg1,arg2,arg3) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[4]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
_argvec[1] = (unsigned long)(arg1); \
_argvec[2] = (unsigned long)(arg2); \
_argvec[3] = (unsigned long)(arg3); \
__asm__ volatile( \
"subl $4, %%esp\n\t" \
"pushl 12(%%eax)\n\t" \
"pushl 8(%%eax)\n\t" \
"pushl 4(%%eax)\n\t" \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
"addl $16, %%esp\n" \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_WWWW(lval, orig, arg1,arg2,arg3,arg4) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[5]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
_argvec[1] = (unsigned long)(arg1); \
_argvec[2] = (unsigned long)(arg2); \
_argvec[3] = (unsigned long)(arg3); \
_argvec[4] = (unsigned long)(arg4); \
__asm__ volatile( \
"pushl 16(%%eax)\n\t" \
"pushl 12(%%eax)\n\t" \
"pushl 8(%%eax)\n\t" \
"pushl 4(%%eax)\n\t" \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
"addl $16, %%esp\n" \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_5W(lval, orig, arg1,arg2,arg3,arg4,arg5) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[6]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
_argvec[1] = (unsigned long)(arg1); \
_argvec[2] = (unsigned long)(arg2); \
_argvec[3] = (unsigned long)(arg3); \
_argvec[4] = (unsigned long)(arg4); \
_argvec[5] = (unsigned long)(arg5); \
__asm__ volatile( \
"subl $12, %%esp\n\t" \
"pushl 20(%%eax)\n\t" \
"pushl 16(%%eax)\n\t" \
"pushl 12(%%eax)\n\t" \
"pushl 8(%%eax)\n\t" \
"pushl 4(%%eax)\n\t" \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
"addl $32, %%esp\n" \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_6W(lval, orig, arg1,arg2,arg3,arg4,arg5,arg6) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[7]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
_argvec[1] = (unsigned long)(arg1); \
_argvec[2] = (unsigned long)(arg2); \
_argvec[3] = (unsigned long)(arg3); \
_argvec[4] = (unsigned long)(arg4); \
_argvec[5] = (unsigned long)(arg5); \
_argvec[6] = (unsigned long)(arg6); \
__asm__ volatile( \
"subl $8, %%esp\n\t" \
"pushl 24(%%eax)\n\t" \
"pushl 20(%%eax)\n\t" \
"pushl 16(%%eax)\n\t" \
"pushl 12(%%eax)\n\t" \
"pushl 8(%%eax)\n\t" \
"pushl 4(%%eax)\n\t" \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
"addl $32, %%esp\n" \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_7W(lval, orig, arg1,arg2,arg3,arg4,arg5,arg6, \
arg7) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[8]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
_argvec[1] = (unsigned long)(arg1); \
_argvec[2] = (unsigned long)(arg2); \
_argvec[3] = (unsigned long)(arg3); \
_argvec[4] = (unsigned long)(arg4); \
_argvec[5] = (unsigned long)(arg5); \
_argvec[6] = (unsigned long)(arg6); \
_argvec[7] = (unsigned long)(arg7); \
__asm__ volatile( \
"subl $4, %%esp\n\t" \
"pushl 28(%%eax)\n\t" \
"pushl 24(%%eax)\n\t" \
"pushl 20(%%eax)\n\t" \
"pushl 16(%%eax)\n\t" \
"pushl 12(%%eax)\n\t" \
"pushl 8(%%eax)\n\t" \
"pushl 4(%%eax)\n\t" \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
"addl $32, %%esp\n" \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_8W(lval, orig, arg1,arg2,arg3,arg4,arg5,arg6, \
arg7,arg8) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[9]; \
volatile unsigned long _res; \
_argvec[0] = (unsigned long)_orig.nraddr; \
_argvec[1] = (unsigned long)(arg1); \
_argvec[2] = (unsigned long)(arg2); \
_argvec[3] = (unsigned long)(arg3); \
_argvec[4] = (unsigned long)(arg4); \
_argvec[5] = (unsigned long)(arg5); \
_argvec[6] = (unsigned long)(arg6); \
_argvec[7] = (unsigned long)(arg7); \
_argvec[8] = (unsigned long)(arg8); \
__asm__ volatile( \
"pushl 32(%%eax)\n\t" \
"pushl 28(%%eax)\n\t" \
"pushl 24(%%eax)\n\t" \
"pushl 20(%%eax)\n\t" \
"pushl 16(%%eax)\n\t" \
"pushl 12(%%eax)\n\t" \
"pushl 8(%%eax)\n\t" \
"pushl 4(%%eax)\n\t" \
"movl (%%eax), %%eax\n\t" /* target->%eax */ \
VALGRIND_CALL_NOREDIR_EAX \
"addl $32, %%esp\n" \
: /*out*/ "=a" (_res) \
: /*in*/ "a" (&_argvec[0]) \
: /*trash*/ "cc", "memory", __CALLER_SAVED_REGS \
); \
lval = (__typeof__(lval)) _res; \
} while (0)
#define CALL_FN_W_9W(lval, orig, arg1,arg2,arg3,arg4,arg5,arg6, \
arg7,arg8,arg9) \
do { \
volatile OrigFn _orig = (orig); \
volatile unsigned long _argvec[10]; \