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ftmemsim-valgrind/coregrind/m_syswrap/syswrap-mips32-linux.c
Philippe Waroquiers 489cfd5156 Fix 342040 Valgrind mishandles clone with CLONE_VFORK | CLONE_VM that clones to a different stack 
Fix 373192 Calling posix_spawn in glibc 2.24 completely broken

Functionally, this patch just does the following 2 changes to the
fork clone handling:
* It does not mask anymore CLONE_VFORK :
  The only effect of this flag is to suspend the parent, waiting for
  the child to either exit or execve.
  If some applications depends on this synchronisation, better keep it,
  as it will not harm to suspend the parent valgrind waiting for the
  child valgrind to exit or execve.
* In case the guest calls the clone syscall providing a non zero client stack,
  set the child guest SP after the syscall, before executing guest instructions.
  Not setting the guest stack ptr was the source of the problem reported
  in the bugs.

This also adds a test case  none/tests/linux/clonev.
Before this patch, test gives a SEGV, which is fixed by the patch.

The patch is however a lot bigger : this fix was touching some (mostly
identical/duplicated) code in all the linux platforms.
So, the clone/fork code has been factorised as much as possible.
This removes about 1700 lines of code.

This has been tested on:
* amd64
* x86
* ppc64 be and le
* ppc32
* arm64

This has been compiled on but *not really tested* on:
* mips64 (not too clear how to properly build and run valgrind on gcc22)

It has *not* been compiled and *not* tested on:
* arm
* mips32
* tilegx
* darwin   (normally, no impact)
* solaris  (normally, no impact)

The changes are relatively mechanical, so it is not impossible that
it will compile and work out of the box on these platforms.
Otherwise, questions welcome.

A few points of interest:
* Some platforms did have a typedef void vki_modify_ldt_t,
  and some platforms had no definition for this type at all.
  To make it easier to factorise, for such platforms, the following has
  been used:
     typedef char vki_modify_ldt_t;
    When the sizeof vki_modify_ldt_t is > 1, then the arg syscall is checked.
  This is somewhat a hack, but was simplifying the factorisation.

* for mips32/mips64 and tilegx, there is a strange unconditional assignment
  of 0 to a register (guest_r2 on mips, guest_r0 on tilegx).
  Unclear what this is, in particular because this is assigned whatever
  the result of the syscall (success or not).
  



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@16186
2016-12-11 21:39:23 +00:00

1009 lines
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/*--------------------------------------------------------------------*/
/*--- Platform-specific syscalls stuff. syswrap-mips32-linux.c ----*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2010-2015 RT-RK
mips-valgrind@rt-rk.com
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
#if defined(VGP_mips32_linux)
#include "pub_core_basics.h"
#include "pub_core_vki.h"
#include "pub_core_vkiscnums.h"
#include "pub_core_threadstate.h"
#include "pub_core_aspacemgr.h"
#include "pub_core_debuglog.h"
#include "pub_core_libcbase.h"
#include "pub_core_libcassert.h"
#include "pub_core_libcprint.h"
#include "pub_core_libcproc.h"
#include "pub_core_libcsignal.h"
#include "pub_core_options.h"
#include "pub_core_scheduler.h"
#include "pub_core_sigframe.h" // For VG_(sigframe_destroy)()
#include "pub_core_signals.h"
#include "pub_core_syscall.h"
#include "pub_core_syswrap.h"
#include "pub_core_tooliface.h"
#include "pub_core_transtab.h" // VG_(discard_translations)
#include "priv_types_n_macros.h"
#include "priv_syswrap-generic.h" /* for decls of generic wrappers */
#include "priv_syswrap-linux.h" /* for decls of linux-ish wrappers */
#include "priv_syswrap-main.h"
#include "pub_core_debuginfo.h" // VG_(di_notify_*)
#include "pub_core_xarray.h"
#include "pub_core_clientstate.h" // VG_(brk_base), VG_(brk_limit)
#include "pub_core_errormgr.h"
#include "pub_core_gdbserver.h" // VG_(gdbserver)
#include "pub_core_libcfile.h"
#include "pub_core_machine.h" // VG_(get_SP)
#include "pub_core_mallocfree.h"
#include "pub_core_stacktrace.h" // For VG_(get_and_pp_StackTrace)()
#include "pub_core_ume.h"
#include "priv_syswrap-generic.h"
#include "config.h"
#include <errno.h>
/* ---------------------------------------------------------------------
clone() handling
------------------------------------------------------------------ */
/* Call f(arg1), but first switch stacks, using 'stack' as the new
stack, and use 'retaddr' as f's return-to address. Also, clear all
the integer registers before entering f.*/
__attribute__ ((noreturn))
void ML_ (call_on_new_stack_0_1) (Addr stack, Addr retaddr,
void (*f) (Word), Word arg1);
// a0 = stack
// a1 = retaddr
// a2 = f
// a3 = arg1
asm (
".text\n"
".globl vgModuleLocal_call_on_new_stack_0_1\n"
"vgModuleLocal_call_on_new_stack_0_1:\n"
" move $29, $4\n\t" // stack to %sp
" move $31, $5\n\t" // retaddr to $ra
" move $25, $6\n\t" // f to t9/$25
" move $4, $7\n\t" // arg1 to $a0
" li $2, 0\n\t" // zero all GP regs
" li $3, 0\n\t"
" li $5, 0\n\t"
" li $6, 0\n\t"
" li $7, 0\n\t"
" li $12, 0\n\t"
" li $13, 0\n\t"
" li $14, 0\n\t"
" li $15, 0\n\t"
" li $16, 0\n\t"
" li $17, 0\n\t"
" li $18, 0\n\t"
" li $19, 0\n\t"
" li $20, 0\n\t"
" li $21, 0\n\t"
" li $22, 0\n\t"
" li $23, 0\n\t"
" li $24, 0\n\t"
" jr $25\n\t" // jump to dst
" break 0x7\n" // should never get here
".previous\n"
);
/*
Perform a clone system call. clone is strange because it has
fork()-like return-twice semantics, so it needs special
handling here.
Upon entry, we have:
int (fn)(void*) in $a0 0
void* child_stack in $a1 4
int flags in $a2 8
void* arg in $a3 12
pid_t* child_tid in stack 16
pid_t* parent_tid in stack 20
void* tls_ptr in stack 24
System call requires:
int $__NR_clone in $v0
int flags in $a0 0
void* child_stack in $a1 4
pid_t* parent_tid in $a2 8
void* tls_ptr in $a3 12
pid_t* child_tid in stack 16
int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
void *parent_tidptr, void *tls, void *child_tidptr)
Returns an Int encoded in the linux-mips way, not a SysRes.
*/
#define __NR_CLONE VG_STRINGIFY(__NR_clone)
#define __NR_EXIT VG_STRINGIFY(__NR_exit)
// See priv_syswrap-linux.h for arg profile.
asm (
".text\n"
" .globl do_syscall_clone_mips_linux\n"
" do_syscall_clone_mips_linux:\n"
" subu $29,$29,32\n\t"
" sw $31, 0($29)\n\t"
" sw $2, 4($29)\n\t"
" sw $3, 8($29)\n\t"
" sw $30, 12($29)\n\t"
" sw $28, 28($29)\n\t"
/* set up child stack with function and arg */
/* syscall arg 2 child_stack is already in a1 */
" subu $5, $5, 32\n\t" /* make space on stack */
" sw $4, 0($5)\n\t" /* fn */
" sw $7, 4($5)\n\t" /* fn arg */
" sw $6, 8($5)\n\t"
/* get other args to clone */
" move $4, $a2\n\t" /* a0 = flags */
" lw $6, 52($29)\n\t" /* a2 = parent_tid */
" lw $7, 48($29)\n\t" /* a3 = child_tid */
" sw $7, 16($29)\n\t" /* 16(sp) = child_tid */
" lw $7, 56($29)\n\t" /* a3 = tls_ptr */
/* do the system call */
" li $2, " __NR_CLONE "\n\t" /* __NR_clone */
" syscall\n\t"
" nop\n\t"
" bnez $7, .Lerror\n\t"
" nop\n\t"
" beqz $2, .Lstart\n\t"
" nop\n\t"
" lw $31, 0($sp)\n\t"
" nop\n\t"
" lw $30, 12($sp)\n\t"
" nop\n\t"
" addu $29,$29,32\n\t" /* free stack */
" nop\n\t"
" jr $31\n\t"
" nop\n\t"
".Lerror:\n\t"
" li $31, 5\n\t"
" jr $31\n\t"
" nop\n\t"
".Lstart:\n\t"
" lw $4, 4($29)\n\t"
" nop\n\t"
" lw $25, 0($29)\n\t"
" nop\n\t"
" jalr $25\n\t"
" nop\n\t"
" move $4, $2\n\t" /* retval from fn is in $v0 */
" li $2, " __NR_EXIT "\n\t" /* NR_exit */
" syscall\n\t"
" nop\n\t"
" .previous\n"
);
#undef __NR_CLONE
#undef __NR_EXIT
// forward declarations
static SysRes sys_set_tls (ThreadId tid, Addr tlsptr);
static SysRes mips_PRE_sys_mmap (ThreadId tid,
UWord arg1, UWord arg2, UWord arg3,
UWord arg4, UWord arg5, Off64T arg6);
/* ---------------------------------------------------------------------
More thread stuff
------------------------------------------------------------------ */
// MIPS doesn't have any architecture specific thread stuff that
// needs to be cleaned up da li ????!!!!???
void
VG_ (cleanup_thread) (ThreadArchState * arch) { }
SysRes sys_set_tls ( ThreadId tid, Addr tlsptr )
{
VG_(threads)[tid].arch.vex.guest_ULR = tlsptr;
return VG_(mk_SysRes_Success)( 0 );
}
/* ---------------------------------------------------------------------
mips handler for mmap and mmap2
------------------------------------------------------------------ */
static void notify_core_of_mmap(Addr a, SizeT len, UInt prot,
UInt flags, Int fd, Off64T offset)
{
Bool d;
/* 'a' is the return value from a real kernel mmap, hence: */
vg_assert(VG_IS_PAGE_ALIGNED(a));
/* whereas len is whatever the syscall supplied. So: */
len = VG_PGROUNDUP(len);
d = VG_(am_notify_client_mmap)( a, len, prot, flags, fd, offset );
if (d)
VG_(discard_translations)( a, (ULong)len,
"notify_core_of_mmap" );
}
static void notify_tool_of_mmap(Addr a, SizeT len, UInt prot, ULong di_handle)
{
Bool rr, ww, xx;
/* 'a' is the return value from a real kernel mmap, hence: */
vg_assert(VG_IS_PAGE_ALIGNED(a));
/* whereas len is whatever the syscall supplied. So: */
len = VG_PGROUNDUP(len);
rr = toBool(prot & VKI_PROT_READ);
ww = toBool(prot & VKI_PROT_WRITE);
xx = toBool(prot & VKI_PROT_EXEC);
VG_TRACK( new_mem_mmap, a, len, rr, ww, xx, di_handle );
}
/* Based on ML_(generic_PRE_sys_mmap) from syswrap-generic.c.
If we are trying to do mmap with VKI_MAP_SHARED flag we need to align the
start address on VKI_SHMLBA like we did in
VG_(am_mmap_file_float_valgrind_flags)
*/
static SysRes mips_PRE_sys_mmap(ThreadId tid,
UWord arg1, UWord arg2, UWord arg3,
UWord arg4, UWord arg5, Off64T arg6)
{
Addr advised;
SysRes sres;
MapRequest mreq;
Bool mreq_ok;
if (arg2 == 0) {
/* SuSV3 says: If len is zero, mmap() shall fail and no mapping
shall be established. */
return VG_(mk_SysRes_Error)( VKI_EINVAL );
}
if (!VG_IS_PAGE_ALIGNED(arg1)) {
/* zap any misaligned addresses. */
/* SuSV3 says misaligned addresses only cause the MAP_FIXED case
to fail. Here, we catch them all. */
return VG_(mk_SysRes_Error)( VKI_EINVAL );
}
if (!VG_IS_PAGE_ALIGNED(arg6)) {
/* zap any misaligned offsets. */
/* SuSV3 says: The off argument is constrained to be aligned and
sized according to the value returned by sysconf() when
passed _SC_PAGESIZE or _SC_PAGE_SIZE. */
return VG_(mk_SysRes_Error)( VKI_EINVAL );
}
/* Figure out what kind of allocation constraints there are
(fixed/hint/any), and ask aspacem what we should do. */
mreq.start = arg1;
mreq.len = arg2;
if (arg4 & VKI_MAP_FIXED) {
mreq.rkind = MFixed;
} else
if (arg1 != 0) {
mreq.rkind = MHint;
} else {
mreq.rkind = MAny;
}
if ((VKI_SHMLBA > VKI_PAGE_SIZE) && (VKI_MAP_SHARED & arg4)
&& !(VKI_MAP_FIXED & arg4))
mreq.len = arg2 + VKI_SHMLBA - VKI_PAGE_SIZE;
/* Enquire ... */
advised = VG_(am_get_advisory)( &mreq, True/*client*/, &mreq_ok );
if ((VKI_SHMLBA > VKI_PAGE_SIZE) && (VKI_MAP_SHARED & arg4)
&& !(VKI_MAP_FIXED & arg4))
advised = VG_ROUNDUP(advised, VKI_SHMLBA);
if (!mreq_ok) {
/* Our request was bounced, so we'd better fail. */
return VG_(mk_SysRes_Error)( VKI_EINVAL );
}
/* Otherwise we're OK (so far). Install aspacem's choice of
address, and let the mmap go through. */
sres = VG_(am_do_mmap_NO_NOTIFY)(advised, arg2, arg3,
arg4 | VKI_MAP_FIXED,
arg5, arg6);
/* A refinement: it may be that the kernel refused aspacem's choice
of address. If we were originally asked for a hinted mapping,
there is still a last chance: try again at any address.
Hence: */
if (mreq.rkind == MHint && sr_isError(sres)) {
mreq.start = 0;
mreq.len = arg2;
mreq.rkind = MAny;
advised = VG_(am_get_advisory)( &mreq, True/*client*/, &mreq_ok );
if (!mreq_ok) {
/* Our request was bounced, so we'd better fail. */
return VG_(mk_SysRes_Error)( VKI_EINVAL );
}
/* and try again with the kernel */
sres = VG_(am_do_mmap_NO_NOTIFY)(advised, arg2, arg3,
arg4 | VKI_MAP_FIXED,
arg5, arg6);
}
if (!sr_isError(sres)) {
ULong di_handle;
/* Notify aspacem. */
notify_core_of_mmap(
(Addr)sr_Res(sres), /* addr kernel actually assigned */
arg2, /* length */
arg3, /* prot */
arg4, /* the original flags value */
arg5, /* fd */
arg6 /* offset */
);
/* Load symbols? */
di_handle = VG_(di_notify_mmap)( (Addr)sr_Res(sres),
False/*allow_SkFileV*/, (Int)arg5 );
/* Notify the tool. */
notify_tool_of_mmap(
(Addr)sr_Res(sres), /* addr kernel actually assigned */
arg2, /* length */
arg3, /* prot */
di_handle /* so the tool can refer to the read debuginfo later,
if it wants. */
);
}
/* Stay sane */
if (!sr_isError(sres) && (arg4 & VKI_MAP_FIXED))
vg_assert(sr_Res(sres) == arg1);
return sres;
}
/* ---------------------------------------------------------------------
PRE/POST wrappers for mips/Linux-specific syscalls
------------------------------------------------------------------ */
#define PRE(name) DEFN_PRE_TEMPLATE(mips_linux, name)
#define POST(name) DEFN_POST_TEMPLATE(mips_linux, name)
/* Add prototypes for the wrappers declared here, so that gcc doesn't
harass us for not having prototypes. Really this is a kludge --
the right thing to do is to make these wrappers 'static' since they
aren't visible outside this file, but that requires even more macro
magic. */
//DECL_TEMPLATE (mips_linux, sys_syscall);
DECL_TEMPLATE (mips_linux, sys_mmap);
DECL_TEMPLATE (mips_linux, sys_mmap2);
DECL_TEMPLATE (mips_linux, sys_stat64);
DECL_TEMPLATE (mips_linux, sys_lstat64);
DECL_TEMPLATE (mips_linux, sys_fadvise64);
DECL_TEMPLATE (mips_linux, sys_fstatat64);
DECL_TEMPLATE (mips_linux, sys_fstat64);
DECL_TEMPLATE (mips_linux, sys_sigreturn);
DECL_TEMPLATE (mips_linux, sys_rt_sigreturn);
DECL_TEMPLATE (mips_linux, sys_cacheflush);
DECL_TEMPLATE (mips_linux, sys_set_thread_area);
DECL_TEMPLATE (mips_linux, sys_pipe);
DECL_TEMPLATE (mips_linux, sys_prctl);
PRE(sys_mmap2)
{
/* Exactly like sys_mmap() except the file offset is specified in 4096 byte
units rather than bytes, so that it can be used for files bigger than
2^32 bytes. */
SysRes r;
PRINT("sys_mmap2 ( %#lx, %lu, %lu, %lu, %lu, %lu )",
ARG1, ARG2, SARG3, SARG4, SARG5, SARG6);
PRE_REG_READ6(long, "mmap2", unsigned long, start, unsigned long, length,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, unsigned long, offset);
r = mips_PRE_sys_mmap(tid, ARG1, ARG2, ARG3, ARG4, ARG5,
4096 * (Off64T) ARG6);
SET_STATUS_from_SysRes(r);
}
PRE(sys_mmap)
{
SysRes r;
PRINT("sys_mmap ( %#lx, %lu, %ld, %ld, %ld, %lu )",
ARG1, ARG2, SARG3, SARG4, SARG5, ARG6);
PRE_REG_READ6(long, "mmap", unsigned long, start, vki_size_t, length,
int, prot, int, flags, int, fd, unsigned long, offset);
r = mips_PRE_sys_mmap(tid, ARG1, ARG2, ARG3, ARG4, ARG5, (Off64T) ARG6);
SET_STATUS_from_SysRes(r);
}
// XXX: lstat64/fstat64/stat64 are generic, but not necessarily
// applicable to every architecture -- I think only to 32-bit archs.
// We're going to need something like linux/core_os32.h for such
// things, eventually, I think. --njn
PRE(sys_lstat64)
{
PRINT ("sys_lstat64 ( %#lx(%s), %#lx )", ARG1, (HChar *) ARG1, ARG2);
PRE_REG_READ2 (long, "lstat64", char *, file_name, struct stat64 *, buf);
PRE_MEM_RASCIIZ ("lstat64(file_name)", ARG1);
PRE_MEM_WRITE ("lstat64(buf)", ARG2, sizeof (struct vki_stat64));
}
POST(sys_lstat64)
{
vg_assert (SUCCESS);
if (RES == 0)
{
POST_MEM_WRITE (ARG2, sizeof (struct vki_stat64));
}
}
PRE(sys_stat64)
{
PRINT ("sys_stat64 ( %#lx(%s), %#lx )", ARG1, (HChar *) ARG1, ARG2);
PRE_REG_READ2 (long, "stat64", char *, file_name, struct stat64 *, buf);
PRE_MEM_RASCIIZ ("stat64(file_name)", ARG1);
PRE_MEM_WRITE ("stat64(buf)", ARG2, sizeof (struct vki_stat64));
}
POST(sys_stat64)
{
POST_MEM_WRITE (ARG2, sizeof (struct vki_stat64));
}
PRE(sys_fadvise64)
{
PRINT("sys_fadvise64 ( %ld, %llu, %llu, %ld )",
SARG1, MERGE64(ARG3,ARG4), MERGE64(ARG5, ARG6), SARG7);
if (VG_(tdict).track_pre_reg_read) {
PRRSN;
PRA1("fadvise64", int, fd);
PRA3("fadvise64", vki_u32, MERGE64_FIRST(offset));
PRA4("fadvise64", vki_u32, MERGE64_SECOND(offset));
PRA5("fadvise64", vki_u32, MERGE64_FIRST(len));
PRA6("fadvise64", vki_u32, MERGE64_SECOND(len));
PRA7("fadvise64", int, advice);
}
}
PRE(sys_fstatat64)
{
// ARG4 = int flags; Flags are or'ed together, therefore writing them
// as a hex constant is more meaningful.
PRINT("sys_fstatat64 ( %ld, %#lx(%s), %#lx, %#lx )",
SARG1, ARG2, (HChar*)ARG2, ARG3, ARG4);
PRE_REG_READ4(long, "fstatat64",
int, dfd, char *, file_name, struct stat64 *, buf, int, flags);
PRE_MEM_RASCIIZ ("fstatat64(file_name)", ARG2);
PRE_MEM_WRITE ("fstatat64(buf)", ARG3, sizeof (struct vki_stat64));
}
POST(sys_fstatat64)
{
POST_MEM_WRITE (ARG3, sizeof (struct vki_stat64));
}
PRE(sys_fstat64)
{
PRINT ("sys_fstat64 ( %lu, %#lx )", SARG1, ARG2);
PRE_REG_READ2 (long, "fstat64", unsigned long, fd, struct stat64 *, buf);
PRE_MEM_WRITE ("fstat64(buf)", ARG2, sizeof (struct vki_stat64));
}
POST(sys_fstat64)
{
POST_MEM_WRITE (ARG2, sizeof (struct vki_stat64));
}
PRE(sys_sigreturn)
{
PRINT ("sys_sigreturn ( )");
vg_assert (VG_ (is_valid_tid) (tid));
vg_assert (tid >= 1 && tid < VG_N_THREADS);
vg_assert (VG_ (is_running_thread) (tid));
VG_ (sigframe_destroy) (tid, False);
/* Tell the driver not to update the guest state with the "result",
and set a bogus result to keep it happy. */
*flags |= SfNoWriteResult;
SET_STATUS_Success (0);
/* Check to see if any signals arose as a result of this. */
*flags |= SfPollAfter;
}
PRE(sys_rt_sigreturn)
{
PRINT ("rt_sigreturn ( )");
vg_assert (VG_ (is_valid_tid) (tid));
vg_assert (tid >= 1 && tid < VG_N_THREADS);
vg_assert (VG_ (is_running_thread) (tid));
/* Restore register state from frame and remove it */
VG_ (sigframe_destroy) (tid, True);
/* Tell the driver not to update the guest state with the "result",
and set a bogus result to keep it happy. */
*flags |= SfNoWriteResult;
SET_STATUS_Success (0);
/* Check to see if any signals arose as a result of this. */
*flags |= SfPollAfter;
}
PRE(sys_set_thread_area)
{
PRINT ("set_thread_area (%lx)", ARG1);
PRE_REG_READ1(long, "set_thread_area", unsigned long, addr);
SET_STATUS_from_SysRes( sys_set_tls( tid, ARG1 ) );
}
/* Very much MIPS specific */
PRE(sys_cacheflush)
{
PRINT ("cacheflush (%lx, %ld, %ld)", ARG1, SARG2, SARG3);
PRE_REG_READ3(long, "cacheflush", unsigned long, addr,
int, nbytes, int, cache);
VG_ (discard_translations) ((Addr)ARG1, (ULong) ARG2,
"PRE(sys_cacheflush)");
SET_STATUS_Success (0);
}
PRE(sys_pipe)
{
PRINT("sys_pipe ( %#lx )", ARG1);
PRE_REG_READ1(int, "pipe", int *, filedes);
PRE_MEM_WRITE( "pipe(filedes)", ARG1, 2*sizeof(int) );
}
POST(sys_pipe)
{
Int p0, p1;
vg_assert(SUCCESS);
p0 = RES;
p1 = sr_ResEx(status->sres);
if (!ML_(fd_allowed)(p0, "pipe", tid, True) ||
!ML_(fd_allowed)(p1, "pipe", tid, True)) {
VG_(close)(p0);
VG_(close)(p1);
SET_STATUS_Failure( VKI_EMFILE );
} else {
if (VG_(clo_track_fds)) {
ML_(record_fd_open_nameless)(tid, p0);
ML_(record_fd_open_nameless)(tid, p1);
}
}
}
PRE(sys_prctl)
{
switch (ARG1) {
case VKI_PR_SET_FP_MODE:
{
VexArchInfo vai;
VG_(machine_get_VexArchInfo)(NULL, &vai);
/* Reject unsupported modes */
if ((ARG2 & ~VKI_PR_FP_MODE_FR) ||
((ARG2 & VKI_PR_FP_MODE_FR) &&
!VEX_MIPS_HOST_FP_MODE(vai.hwcaps))) {
SET_STATUS_Failure(VKI_EOPNOTSUPP);
} else {
if (!(VG_(threads)[tid].arch.vex.guest_CP0_status &
MIPS_CP0_STATUS_FR) != !(ARG2 & VKI_PR_FP_MODE_FR)) {
ThreadId t;
for (t = 1; t < VG_N_THREADS; t++) {
if (VG_(threads)[t].status != VgTs_Empty) {
if (ARG2 & VKI_PR_FP_MODE_FR) {
VG_(threads)[t].arch.vex.guest_CP0_status |=
MIPS_CP0_STATUS_FR;
} else {
VG_(threads)[t].arch.vex.guest_CP0_status &=
~MIPS_CP0_STATUS_FR;
}
}
}
/* Discard all translations */
VG_(discard_translations)(0, 0xfffffffful, "prctl(PR_SET_FP_MODE)");
}
SET_STATUS_Success(0);
}
break;
}
case VKI_PR_GET_FP_MODE:
if (VG_(threads)[tid].arch.vex.guest_CP0_status & MIPS_CP0_STATUS_FR)
SET_STATUS_Success(VKI_PR_FP_MODE_FR);
else
SET_STATUS_Success(0);
break;
default:
WRAPPER_PRE_NAME(linux, sys_prctl)(tid, layout, arrghs, status, flags);
break;
}
}
POST(sys_prctl)
{
WRAPPER_POST_NAME(linux, sys_prctl)(tid, arrghs, status);
}
#undef PRE
#undef POST
/* ---------------------------------------------------------------------
The mips/Linux syscall table
------------------------------------------------------------------ */
#define PLAX_(sysno, name) WRAPPER_ENTRY_X_(mips_linux, sysno, name)
#define PLAXY(sysno, name) WRAPPER_ENTRY_XY(mips_linux, sysno, name)
// This table maps from __NR_xxx syscall numbers (from
// linux/include/asm-mips/unistd.h) to the appropriate PRE/POST sys_foo()
// wrappers on mips (as per sys_call_table in linux/arch/mips/kernel/entry.S).
//
// For those syscalls not handled by Valgrind, the annotation indicate its
// arch/OS combination, eg. */* (generic), */Linux (Linux only), ?/?
// (unknown).
static SyscallTableEntry syscall_main_table[] = {
//.. PLAXY (__NR_syscall, sys_syscall), // 0
GENX_ (__NR_exit, sys_exit), // 1
GENX_ (__NR_fork, sys_fork), // 2
GENXY (__NR_read, sys_read), // 3
GENX_ (__NR_write, sys_write), // 4
GENXY (__NR_open, sys_open), // 5
GENXY (__NR_close, sys_close), // 6
GENXY (__NR_waitpid, sys_waitpid), // 7
GENXY (__NR_creat, sys_creat), // 8
GENX_ (__NR_link, sys_link), // 9
GENX_ (__NR_unlink, sys_unlink), // 10
GENX_ (__NR_execve, sys_execve), // 11
GENX_ (__NR_chdir, sys_chdir), // 12
GENXY (__NR_time, sys_time), // 13
GENX_ (__NR_mknod, sys_mknod), // 14
GENX_ (__NR_chmod, sys_chmod), // 15
GENX_ (__NR_lchown, sys_lchown), // 16
//..
LINX_ (__NR_lseek, sys_lseek), // 19
GENX_ (__NR_getpid, sys_getpid), // 20
LINX_ (__NR_mount, sys_mount), // 21
LINX_ (__NR_umount, sys_oldumount), // 22
GENX_ (__NR_setuid, sys_setuid), // 23
GENX_ (__NR_getuid, sys_getuid), // 24
LINX_ (__NR_stime, sys_stime), // 25
//.. PLAXY(__NR_ptrace, sys_ptrace), // 26
GENX_ (__NR_alarm, sys_alarm), // 27
//.. // (__NR_oldfstat, sys_fstat), // 28
GENX_ (__NR_pause, sys_pause), // 29
LINX_ (__NR_utime, sys_utime), // 30
//.. GENX_(__NR_stty, sys_ni_syscall), // 31
//.. GENX_(__NR_gtty, sys_ni_syscall), // 32
GENX_ (__NR_access, sys_access), // 33
//.. GENX_(__NR_nice, sys_nice), // 34
//.. GENX_(__NR_ftime, sys_ni_syscall), // 35
//.. GENX_(__NR_sync, sys_sync), // 36
GENX_ (__NR_kill, sys_kill), // 37
GENX_ (__NR_rename, sys_rename), // 38
GENX_ (__NR_mkdir, sys_mkdir), // 39
GENX_ (__NR_rmdir, sys_rmdir), // 40
GENXY (__NR_dup, sys_dup), // 41
PLAXY (__NR_pipe, sys_pipe), // 42
GENXY (__NR_times, sys_times), // 43
//.. GENX_(__NR_prof, sys_ni_syscall), // 44
GENX_ (__NR_brk, sys_brk), // 45
GENX_ (__NR_setgid, sys_setgid), // 46
GENX_ (__NR_getgid, sys_getgid), // 47
//.. // (__NR_signal, sys_signal), // 48
GENX_ (__NR_geteuid, sys_geteuid), // 49
GENX_ (__NR_getegid, sys_getegid), // 50
//.. GENX_(__NR_acct, sys_acct), // 51
LINX_ (__NR_umount2, sys_umount), // 52
//.. GENX_(__NR_lock, sys_ni_syscall), // 53
LINXY (__NR_ioctl, sys_ioctl), // 54
LINXY (__NR_fcntl, sys_fcntl), // 55
//.. GENX_(__NR_mpx, sys_ni_syscall), // 56
GENX_ (__NR_setpgid, sys_setpgid), // 57
//.. GENX_(__NR_ulimit, sys_ni_syscall), // 58
//.. // (__NR_oldolduname, sys_olduname), // 59
GENX_ (__NR_umask, sys_umask), // 60
GENX_ (__NR_chroot, sys_chroot), // 61
//.. // (__NR_ustat, sys_ustat) // 62
GENXY (__NR_dup2, sys_dup2), // 63
GENX_ (__NR_getppid, sys_getppid), // 64
GENX_ (__NR_getpgrp, sys_getpgrp), // 65
GENX_ (__NR_setsid, sys_setsid), // 66
LINXY (__NR_sigaction, sys_sigaction), // 67
//.. // (__NR_sgetmask, sys_sgetmask), // 68
//.. // (__NR_ssetmask, sys_ssetmask), // 69
GENX_ (__NR_setreuid, sys_setreuid), // 70
GENX_ (__NR_setregid, sys_setregid), // 71
// PLAX_(__NR_sigsuspend, sys_sigsuspend), // 72
LINXY (__NR_sigpending, sys_sigpending), // 73
//.. // (__NR_sethostname, sys_sethostname), // 74
GENX_ (__NR_setrlimit, sys_setrlimit), // 75
GENXY (__NR_getrlimit, sys_getrlimit), // 76
GENXY (__NR_getrusage, sys_getrusage), // 77
GENXY (__NR_gettimeofday, sys_gettimeofday), // 78
GENX_ (__NR_settimeofday, sys_settimeofday), // 79
GENXY (__NR_getgroups, sys_getgroups), // 80
GENX_ (__NR_setgroups, sys_setgroups), // 81
//.. PLAX_(__NR_select, old_select), // 82
GENX_ (__NR_symlink, sys_symlink), // 83
//.. // (__NR_oldlstat, sys_lstat), // 84
GENX_ (__NR_readlink, sys_readlink), // 85
//.. // (__NR_uselib, sys_uselib), // 86
//.. // (__NR_swapon, sys_swapon), // 87
//.. // (__NR_reboot, sys_reboot), // 88
//.. // (__NR_readdir, old_readdir), // 89
PLAX_ (__NR_mmap, sys_mmap), // 90
GENXY (__NR_munmap, sys_munmap), // 91
GENX_ (__NR_truncate, sys_truncate), // 92
GENX_ (__NR_ftruncate, sys_ftruncate), // 93
GENX_ (__NR_fchmod, sys_fchmod), // 94
GENX_ (__NR_fchown, sys_fchown), // 95
GENX_ (__NR_getpriority, sys_getpriority), // 96
GENX_ (__NR_setpriority, sys_setpriority), // 97
//.. GENX_(__NR_profil, sys_ni_syscall), // 98
GENXY (__NR_statfs, sys_statfs), // 99
GENXY (__NR_fstatfs, sys_fstatfs), // 100
//.. LINX_(__NR_ioperm, sys_ioperm), // 101
LINXY (__NR_socketcall, sys_socketcall), // 102
LINXY (__NR_syslog, sys_syslog), // 103
GENXY (__NR_setitimer, sys_setitimer), // 104
//.. GENXY(__NR_getitimer, sys_getitimer), // 105
GENXY (__NR_stat, sys_newstat), // 106
GENXY (__NR_lstat, sys_newlstat), // 107
GENXY (__NR_fstat, sys_newfstat), // 108
//.. // (__NR_olduname, sys_uname), // 109
//.. GENX_(__NR_iopl, sys_iopl), // 110
//.. LINX_(__NR_vhangup, sys_vhangup), // 111
//.. GENX_(__NR_idle, sys_ni_syscall), // 112
//.. // (__NR_vm86old, sys_vm86old), // 113
GENXY (__NR_wait4, sys_wait4), // 114
//.. // (__NR_swapoff, sys_swapoff), // 115
LINXY (__NR_sysinfo, sys_sysinfo), // 116
LINXY (__NR_ipc, sys_ipc), // 117
GENX_ (__NR_fsync, sys_fsync), // 118
PLAX_ (__NR_sigreturn, sys_sigreturn), // 119
LINX_ (__NR_clone, sys_clone), // 120
//.. // (__NR_setdomainname, sys_setdomainname), // 121
GENXY (__NR_uname, sys_newuname), // 122
//.. PLAX_(__NR_modify_ldt, sys_modify_ldt), // 123
//.. LINXY(__NR_adjtimex, sys_adjtimex), // 124
GENXY (__NR_mprotect, sys_mprotect), // 125
LINXY (__NR_sigprocmask, sys_sigprocmask), // 126
//.. GENX_(__NR_create_module, sys_ni_syscall), // 127
//.. GENX_(__NR_init_module, sys_init_module), // 128
//.. // (__NR_delete_module, sys_delete_module), // 129
//.. GENX_(__NR_get_kernel_syms, sys_ni_syscall), // 130
//.. LINX_(__NR_quotactl, sys_quotactl), // 131
GENX_ (__NR_getpgid, sys_getpgid), // 132
GENX_ (__NR_fchdir, sys_fchdir), // 133
//.. // (__NR_bdflush, sys_bdflush), // 134
//.. // (__NR_sysfs, sys_sysfs), // 135
LINX_ (__NR_personality, sys_personality), // 136
//.. GENX_(__NR_afs_syscall, sys_ni_syscall), // 137
LINX_ (__NR_setfsuid, sys_setfsuid), // 138
LINX_ (__NR_setfsgid, sys_setfsgid), // 139
LINXY (__NR__llseek, sys_llseek), // 140
GENXY (__NR_getdents, sys_getdents), // 141
GENX_ (__NR__newselect, sys_select), // 142
GENX_ (__NR_flock, sys_flock), // 143
GENX_ (__NR_msync, sys_msync), // 144
GENXY (__NR_readv, sys_readv), // 145
GENX_ (__NR_writev, sys_writev), // 146
PLAX_ (__NR_cacheflush, sys_cacheflush), // 147
GENX_ (__NR_getsid, sys_getsid), // 151
GENX_ (__NR_fdatasync, sys_fdatasync), // 152
LINXY (__NR__sysctl, sys_sysctl), // 153
GENX_ (__NR_mlock, sys_mlock), // 154
GENX_ (__NR_munlock, sys_munlock), // 155
GENX_ (__NR_mlockall, sys_mlockall), // 156
LINX_ (__NR_munlockall, sys_munlockall), // 157
//.. LINXY(__NR_sched_setparam, sys_sched_setparam), // 158
LINXY (__NR_sched_getparam, sys_sched_getparam), // 159
LINX_ (__NR_sched_setscheduler, sys_sched_setscheduler), // 160
LINX_ (__NR_sched_getscheduler, sys_sched_getscheduler), // 161
LINX_ (__NR_sched_yield, sys_sched_yield), // 162
LINX_ (__NR_sched_get_priority_max, sys_sched_get_priority_max), // 163
LINX_ (__NR_sched_get_priority_min, sys_sched_get_priority_min), // 164
//.. //LINX?(__NR_sched_rr_get_interval, sys_sched_rr_get_interval), // 165
GENXY (__NR_nanosleep, sys_nanosleep), // 166
GENX_ (__NR_mremap, sys_mremap), // 167
LINXY (__NR_accept, sys_accept), // 168
LINX_ (__NR_bind, sys_bind), // 169
LINX_ (__NR_connect, sys_connect), // 170
LINXY (__NR_getpeername, sys_getpeername), // 171
LINXY (__NR_getsockname, sys_getsockname), // 172
LINXY (__NR_getsockopt, sys_getsockopt), // 173
LINX_ (__NR_listen, sys_listen), // 174
LINXY (__NR_recv, sys_recv), // 175
LINXY (__NR_recvfrom, sys_recvfrom), // 176
LINXY (__NR_recvmsg, sys_recvmsg), // 177
LINX_ (__NR_send, sys_send), // 178
LINX_ (__NR_sendmsg, sys_sendmsg), // 179
LINX_ (__NR_sendto, sys_sendto), // 180
LINX_ (__NR_setsockopt, sys_setsockopt), // 181
LINX_ (__NR_shutdown, sys_shutdown), // 182
LINXY (__NR_socket, sys_socket), // 183
LINXY (__NR_socketpair, sys_socketpair), // 184
LINX_ (__NR_setresuid, sys_setresuid), // 185
LINXY (__NR_getresuid, sys_getresuid), // 186
//.. GENX_(__NR_query_module, sys_ni_syscall), // 187
GENXY (__NR_poll, sys_poll), // 188
//..
LINX_ (__NR_setresgid, sys_setresgid), // 190
LINXY (__NR_getresgid, sys_getresgid), // 191
PLAXY (__NR_prctl, sys_prctl), // 192
PLAX_ (__NR_rt_sigreturn, sys_rt_sigreturn), // 193
LINXY (__NR_rt_sigaction, sys_rt_sigaction), // 194
LINXY (__NR_rt_sigprocmask, sys_rt_sigprocmask), // 195
LINXY (__NR_rt_sigpending, sys_rt_sigpending), // 196
LINXY (__NR_rt_sigtimedwait, sys_rt_sigtimedwait), // 197
LINXY (__NR_rt_sigqueueinfo, sys_rt_sigqueueinfo), // 198
LINX_ (__NR_rt_sigsuspend, sys_rt_sigsuspend), // 199
GENXY (__NR_pread64, sys_pread64), // 200
GENX_ (__NR_pwrite64, sys_pwrite64), // 201
GENX_ (__NR_chown, sys_chown), // 202
GENXY (__NR_getcwd, sys_getcwd), // 203
LINXY (__NR_capget, sys_capget), // 204
//.. LINX_(__NR_capset, sys_capset), // 205
GENXY (__NR_sigaltstack, sys_sigaltstack), // 206
LINXY (__NR_sendfile, sys_sendfile), // 207
//.. GENXY(__NR_getpmsg, sys_getpmsg), // 208
//.. GENX_(__NR_putpmsg, sys_putpmsg), // 209
PLAX_ (__NR_mmap2, sys_mmap2), // 210
// GENX_(__NR_truncate64, sys_truncate64), // 211
GENX_ (__NR_ftruncate64, sys_ftruncate64), // 212
PLAXY (__NR_stat64, sys_stat64), // 213
PLAXY (__NR_lstat64, sys_lstat64), // 214
PLAXY (__NR_fstat64, sys_fstat64), // 215
//..
GENXY (__NR_mincore, sys_mincore), // 217
GENX_ (__NR_madvise, sys_madvise), // 218
GENXY (__NR_getdents64, sys_getdents64), // 219
LINXY (__NR_fcntl64, sys_fcntl64), // 220
//..
LINX_ (__NR_gettid, sys_gettid), // 222
//..
LINXY (__NR_getxattr, sys_getxattr), // 227
LINXY (__NR_lgetxattr, sys_lgetxattr), // 228
LINXY (__NR_fgetxattr, sys_fgetxattr), // 229
LINXY (__NR_listxattr, sys_listxattr), // 230
LINXY (__NR_llistxattr, sys_llistxattr), // 231
LINXY (__NR_flistxattr, sys_flistxattr), // 232
LINX_ (__NR_removexattr, sys_removexattr), // 233
LINX_ (__NR_lremovexattr, sys_lremovexattr), // 234
LINX_ (__NR_fremovexattr, sys_fremovexattr), // 235
//..
LINXY (__NR_sendfile64, sys_sendfile64), // 237
LINXY (__NR_futex, sys_futex), // 238
LINX_ (__NR_sched_setaffinity, sys_sched_setaffinity), // 239
LINXY (__NR_sched_getaffinity, sys_sched_getaffinity), // 240
LINX_ (__NR_io_setup, sys_io_setup), // 241
LINX_ (__NR_io_destroy, sys_io_destroy), // 242
LINXY (__NR_io_getevents, sys_io_getevents), // 243
LINX_ (__NR_io_submit, sys_io_submit), // 244
LINXY (__NR_io_cancel, sys_io_cancel), // 245
LINX_ (__NR_exit_group, sys_exit_group), // 246
//..
LINXY (__NR_epoll_create, sys_epoll_create), // 248
LINX_ (__NR_epoll_ctl, sys_epoll_ctl), // 249
LINXY (__NR_epoll_wait, sys_epoll_wait), // 250
//..
LINX_ (__NR_set_tid_address, sys_set_tid_address), // 252
PLAX_ (__NR_fadvise64, sys_fadvise64), // 254
GENXY (__NR_statfs64, sys_statfs64), // 255
GENXY (__NR_fstatfs64, sys_fstatfs64), // 256
//..
LINXY (__NR_timer_create, sys_timer_create), // 257
LINXY (__NR_timer_settime, sys_timer_settime), // 258
LINXY (__NR_timer_gettime, sys_timer_gettime), // 259
LINX_ (__NR_timer_getoverrun, sys_timer_getoverrun), // 260
LINX_ (__NR_timer_delete, sys_timer_delete), // 261
LINX_ (__NR_clock_settime, sys_clock_settime), // 262
LINXY (__NR_clock_gettime, sys_clock_gettime), // 263
LINXY (__NR_clock_getres, sys_clock_getres), // 264
LINXY (__NR_clock_nanosleep, sys_clock_nanosleep), // 265
LINXY (__NR_tgkill, sys_tgkill), // 266
//.. GENX_(__NR_utimes, sys_utimes), // 267
LINXY (__NR_get_mempolicy, sys_get_mempolicy), // 269
LINX_ (__NR_set_mempolicy, sys_set_mempolicy), // 270
LINXY (__NR_mq_open, sys_mq_open), // 271
LINX_ (__NR_mq_unlink, sys_mq_unlink), // 272
LINX_ (__NR_mq_timedsend, sys_mq_timedsend), // 273
LINXY (__NR_mq_timedreceive, sys_mq_timedreceive), // 274
LINX_ (__NR_mq_notify, sys_mq_notify), // 275
LINXY (__NR_mq_getsetattr, sys_mq_getsetattr), // 276
LINX_ (__NR_inotify_init, sys_inotify_init), // 275
LINX_ (__NR_inotify_add_watch, sys_inotify_add_watch), // 276
LINX_ (__NR_inotify_rm_watch, sys_inotify_rm_watch), // 277
//..
PLAX_ (__NR_set_thread_area, sys_set_thread_area), // 283
//..
LINXY (__NR_openat, sys_openat), // 288
LINX_ (__NR_mkdirat, sys_mkdirat), // 289
LINX_ (__NR_mknodat, sys_mknodat), // 290
LINX_ (__NR_fchownat, sys_fchownat), // 291
LINX_ (__NR_futimesat, sys_futimesat), // 292
PLAXY (__NR_fstatat64, sys_fstatat64), // 293
LINX_ (__NR_unlinkat, sys_unlinkat), // 294
LINX_ (__NR_renameat, sys_renameat), // 295
LINX_ (__NR_linkat, sys_linkat), // 296
LINX_ (__NR_symlinkat, sys_symlinkat), // 297
LINX_ (__NR_readlinkat, sys_readlinkat), // 298
LINX_ (__NR_fchmodat, sys_fchmodat), // 299
LINX_ (__NR_faccessat, sys_faccessat), // 300
LINXY (__NR_pselect6, sys_pselect6), // 301
LINXY (__NR_ppoll, sys_ppoll), // 302
//..
LINX_ (__NR_set_robust_list, sys_set_robust_list), // 309
LINXY (__NR_get_robust_list, sys_get_robust_list), // 310
//..
LINXY (__NR_epoll_pwait, sys_epoll_pwait), // 313
//..
LINX_ (__NR_utimensat, sys_utimensat), // 316
//..
LINX_ (__NR_fallocate, sys_fallocate), // 320
LINXY (__NR_timerfd_create, sys_timerfd_create), // 321
LINXY (__NR_timerfd_gettime, sys_timerfd_gettime), // 322
LINXY (__NR_timerfd_settime, sys_timerfd_settime), // 323
LINXY (__NR_signalfd4, sys_signalfd4), // 324
LINXY (__NR_eventfd2, sys_eventfd2), // 325
//..
LINXY (__NR_pipe2, sys_pipe2), // 328
LINXY (__NR_inotify_init1, sys_inotify_init1), // 329
//..
LINXY (__NR_prlimit64, sys_prlimit64), // 338
//..
LINXY (__NR_clock_adjtime, sys_clock_adjtime), // 341
LINX_ (__NR_syncfs, sys_syncfs), // 342
//..
LINXY (__NR_process_vm_readv, sys_process_vm_readv), // 345
LINX_ (__NR_process_vm_writev, sys_process_vm_writev), // 346
//..
LINXY(__NR_getrandom, sys_getrandom), // 353
LINXY(__NR_memfd_create, sys_memfd_create) // 354
};
SyscallTableEntry* ML_(get_linux_syscall_entry) (UInt sysno)
{
const UInt syscall_main_table_size
= sizeof (syscall_main_table) / sizeof (syscall_main_table[0]);
/* Is it in the contiguous initial section of the table? */
if (sysno < syscall_main_table_size) {
SyscallTableEntry * sys = &syscall_main_table[sysno];
if (sys->before == NULL)
return NULL; /* No entry. */
else
return sys;
}
/* Can't find a wrapper. */
return NULL;
}
#endif // defined(VGP_mips32_linux)
/*--------------------------------------------------------------------*/
/*--- end syswrap-mips-linux.c ---*/
/*--------------------------------------------------------------------*/
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