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gerrit-public.fairphone.software / platform / external / valgrind / 472cc7c8f2e4676d1c9f4b93cf7bce0bd1a156dc / . / coregrind / m_syswrap / syswrap-x86-linux.c
blob: bd355b9e8c604b55f979886b9189db917ed2fec7 [file] [log] [blame]
/*--------------------------------------------------------------------*/
/*--- Platform-specific syscalls stuff. syswrap-x86-linux.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2005 Nicholas Nethercote
njn@valgrind.org
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.
*/
/* TODO/FIXME jrs 20050207: assignments to the syscall return result
in interrupted_syscall() need to be reviewed. They don't seem
to assign the shadow state.
*/
#include "pub_core_basics.h"
#include "pub_core_threadstate.h"
#include "pub_core_debuginfo.h" // Needed for pub_core_aspacemgr :(
#include "pub_core_aspacemgr.h"
#include "pub_core_debuglog.h"
#include "pub_core_libcbase.h"
#include "pub_core_libcassert.h"
#include "pub_core_libcmman.h"
#include "pub_core_libcprint.h"
#include "pub_core_libcproc.h"
#include "pub_core_libcsignal.h"
#include "pub_core_main.h" // For VG_(shutdown_actions_NORETURN)()
#include "pub_core_mallocfree.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 "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 "vki_unistd.h" /* for the __NR_* constants */
/* ---------------------------------------------------------------------
Stacks, thread wrappers
Note. Why is this stuff here?
------------------------------------------------------------------ */
/*
Allocate a stack for this thread.
They're allocated lazily, but never freed.
*/
#define FILL 0xdeadbeef
// Valgrind's stack size, in words.
#define STACK_SIZE_W 16384
static UWord* allocstack(ThreadId tid)
{
ThreadState *tst = VG_(get_ThreadState)(tid);
UWord *esp;
if (tst->os_state.valgrind_stack_base == 0) {
void *stk = VG_(mmap)(0, STACK_SIZE_W * sizeof(UWord) + VKI_PAGE_SIZE,
VKI_PROT_READ|VKI_PROT_WRITE,
VKI_MAP_PRIVATE|VKI_MAP_ANONYMOUS,
SF_VALGRIND,
-1, 0);
if (stk != (void *)-1) {
VG_(mprotect)(stk, VKI_PAGE_SIZE, VKI_PROT_NONE); /* guard page */
tst->os_state.valgrind_stack_base = ((Addr)stk) + VKI_PAGE_SIZE;
tst->os_state.valgrind_stack_szB = STACK_SIZE_W * sizeof(UWord);
} else
return (UWord*)-1;
}
for (esp = (UWord*) tst->os_state.valgrind_stack_base;
esp < (UWord*)(tst->os_state.valgrind_stack_base +
tst->os_state.valgrind_stack_szB);
esp++)
*esp = FILL;
/* esp is left at top of stack */
if (0)
VG_(printf)("stack for tid %d at %p (%x); esp=%p\n",
tid, tst->os_state.valgrind_stack_base,
*(UWord*)(tst->os_state.valgrind_stack_base), esp);
return esp;
}
/* NB: this is identical the the amd64 version. */
/* Return how many bytes of this stack have not been used */
SSizeT VG_(stack_unused)(ThreadId tid)
{
ThreadState *tst = VG_(get_ThreadState)(tid);
UWord* p;
for (p = (UWord*)tst->os_state.valgrind_stack_base;
p && (p < (UWord*)(tst->os_state.valgrind_stack_base +
tst->os_state.valgrind_stack_szB));
p++)
if (*p != FILL)
break;
if (0)
VG_(printf)("p=%p %x tst->os_state.valgrind_stack_base=%p\n",
p, *p, tst->os_state.valgrind_stack_base);
return ((Addr)p) - tst->os_state.valgrind_stack_base;
}
/* Run a thread all the way to the end, then do appropriate exit actions
(this is the last-one-out-turn-off-the-lights bit).
*/
static void run_a_thread_NORETURN ( Word tidW )
{
ThreadId tid = (ThreadId)tidW;
VG_(debugLog)(1, "syswrap-x86-linux",
"run_a_thread_NORETURN(tid=%lld): "
"ML_(thread_wrapper) called\n",
(ULong)tidW);
/* Run the thread all the way through. */
VgSchedReturnCode src = ML_(thread_wrapper)(tid);
VG_(debugLog)(1, "syswrap-x86-linux",
"run_a_thread_NORETURN(tid=%lld): "
"ML_(thread_wrapper) done\n",
(ULong)tidW);
Int c = VG_(count_living_threads)();
vg_assert(c >= 1); /* stay sane */
if (c == 1) {
VG_(debugLog)(1, "syswrap-x86-linux",
"run_a_thread_NORETURN(tid=%lld): "
"last one standing\n",
(ULong)tidW);
/* We are the last one standing. Keep hold of the lock and
carry on to show final tool results, then exit the entire system. */
VG_(shutdown_actions_NORETURN)(tid, src);
} else {
VG_(debugLog)(1, "syswrap-x86-linux",
"run_a_thread_NORETURN(tid=%lld): "
"not last one standing\n",
(ULong)tidW);
/* OK, thread is dead, but others still exist. Just exit. */
ThreadState *tst = VG_(get_ThreadState)(tid);
/* This releases the run lock */
VG_(exit_thread)(tid);
vg_assert(tst->status == VgTs_Zombie);
/* We have to use this sequence to terminate the thread to
prevent a subtle race. If VG_(exit_thread)() had left the
ThreadState as Empty, then it could have been reallocated,
reusing the stack while we're doing these last cleanups.
Instead, VG_(exit_thread) leaves it as Zombie to prevent
reallocation. We need to make sure we don't touch the stack
between marking it Empty and exiting. Hence the
assembler. */
asm volatile (
"movl %1, %0\n" /* set tst->status = VgTs_Empty */
"movl %2, %%eax\n" /* set %eax = __NR_exit */
"movl %3, %%ebx\n" /* set %ebx = tst->os_state.exitcode */
"int $0x80\n" /* exit(tst->os_state.exitcode) */
: "=m" (tst->status)
: "n" (VgTs_Empty), "n" (__NR_exit), "m" (tst->os_state.exitcode));
VG_(core_panic)("Thread exit failed?\n");
}
/*NOTREACHED*/
vg_assert(0);
}
/* 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 call_on_new_stack_0_1 ( Addr stack,
Addr retaddr,
void (*f)(Word),
Word arg1 );
// 4(%esp) == stack
// 8(%esp) == retaddr
// 12(%esp) == f
// 16(%esp) == arg1
asm(
"call_on_new_stack_0_1:\n"
" movl %esp, %esi\n" // remember old stack pointer
" movl 4(%esi), %esp\n" // set stack
" pushl 16(%esi)\n" // arg1 to stack
" pushl 8(%esi)\n" // retaddr to stack
" pushl 12(%esi)\n" // f to stack
" movl $0, %eax\n" // zero all GP regs
" movl $0, %ebx\n"
" movl $0, %ecx\n"
" movl $0, %edx\n"
" movl $0, %esi\n"
" movl $0, %edi\n"
" movl $0, %ebp\n"
" ret\n" // jump to f
" ud2\n" // should never get here
);
/*
Allocate a stack for the main thread, and run it all the way to the
end.
*/
void VG_(main_thread_wrapper_NORETURN)(ThreadId tid)
{
VG_(debugLog)(1, "syswrap-x86-linux",
"entering VG_(main_thread_wrapper_NORETURN)\n");
UWord* esp = allocstack(tid);
/* shouldn't be any other threads around yet */
vg_assert( VG_(count_living_threads)() == 1 );
call_on_new_stack_0_1(
(Addr)esp, /* stack */
0, /*bogus return address*/
run_a_thread_NORETURN, /* fn to call */
(Word)tid /* arg to give it */
);
/*NOTREACHED*/
vg_assert(0);
}
static Int start_thread_NORETURN ( void* arg )
{
ThreadState* tst = (ThreadState*)arg;
ThreadId tid = tst->tid;
run_a_thread_NORETURN ( (Word)tid );
/*NOTREACHED*/
vg_assert(0);
}
/* ---------------------------------------------------------------------
clone() handling
------------------------------------------------------------------ */
/*
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 0+FSZ(%esp)
void* child_stack in 4+FSZ(%esp)
int flags in 8+FSZ(%esp)
void* arg in 12+FSZ(%esp)
pid_t* child_tid in 16+FSZ(%esp)
pid_t* parent_tid in 20+FSZ(%esp)
void* tls_ptr in 24+FSZ(%esp)
System call requires:
int $__NR_clone in %eax
int flags in %ebx
void* child_stack in %ecx
pid_t* parent_tid in %edx
pid_t* child_tid in %edi
void* tls_ptr in %esi
Returns an Int encoded in the linux-x86 way, not a SysRes.
*/
#define STRINGIFZ(__str) #__str
#define STRINGIFY(__str) STRINGIFZ(__str)
#define FSZ "4+4+4" /* frame size = retaddr+ebx+edi */
#define __NR_CLONE STRINGIFY(__NR_clone)
#define __NR_EXIT STRINGIFY(__NR_exit)
extern
Int do_syscall_clone_x86_linux ( Int (*fn)(void *),
void* stack,
Int flags,
void* arg,
Int* child_tid,
Int* parent_tid,
vki_modify_ldt_t * );
asm(
"\n"
"do_syscall_clone_x86_linux:\n"
" push %ebx\n"
" push %edi\n"
/* set up child stack with function and arg */
" movl 4+"FSZ"(%esp), %ecx\n" /* syscall arg2: child stack */
" movl 12+"FSZ"(%esp), %ebx\n" /* fn arg */
" movl 0+"FSZ"(%esp), %eax\n" /* fn */
" lea -8(%ecx), %ecx\n" /* make space on stack */
" movl %ebx, 4(%ecx)\n" /* fn arg */
" movl %eax, 0(%ecx)\n" /* fn */
/* get other args to clone */
" movl 8+"FSZ"(%esp), %ebx\n" /* syscall arg1: flags */
" movl 20+"FSZ"(%esp), %edx\n" /* syscall arg3: parent tid * */
" movl 16+"FSZ"(%esp), %edi\n" /* syscall arg4: child tid * */
" movl 24+"FSZ"(%esp), %esi\n" /* syscall arg5: tls_ptr * */
" movl $"__NR_CLONE", %eax\n"
" int $0x80\n" /* clone() */
" testl %eax, %eax\n" /* child if retval == 0 */
" jnz 1f\n"
/* CHILD - call thread function */
" popl %eax\n"
" call *%eax\n" /* call fn */
/* exit with result */
" movl %eax, %ebx\n" /* arg1: return value from fn */
" movl $"__NR_EXIT", %eax\n"
" int $0x80\n"
/* Hm, exit returned */
" ud2\n"
"1:\n" /* PARENT or ERROR */
" pop %edi\n"
" pop %ebx\n"
" ret\n"
);
#undef FSZ
#undef __NR_CLONE
#undef __NR_EXIT
#undef STRINGIFY
#undef STRINGIFZ
// forward declarations
static void setup_child ( ThreadArchState*, ThreadArchState*, Bool );
static SysRes sys_set_thread_area ( ThreadId, vki_modify_ldt_t* );
/*
When a client clones, we need to keep track of the new thread. This means:
1. allocate a ThreadId+ThreadState+stack for the the thread
2. initialize the thread's new VCPU state
3. create the thread using the same args as the client requested,
but using the scheduler entrypoint for EIP, and a separate stack
for ESP.
*/
static SysRes do_clone ( ThreadId ptid,
UInt flags, Addr esp,
Int* parent_tidptr,
Int* child_tidptr,
vki_modify_ldt_t *tlsinfo)
{
static const Bool debug = False;
ThreadId ctid = VG_(alloc_ThreadState)();
ThreadState* ptst = VG_(get_ThreadState)(ptid);
ThreadState* ctst = VG_(get_ThreadState)(ctid);
UWord* stack;
Segment* seg;
SysRes res;
Int eax;
vki_sigset_t blockall, savedmask;
VG_(sigfillset)(&blockall);
vg_assert(VG_(is_running_thread)(ptid));
vg_assert(VG_(is_valid_tid)(ctid));
stack = allocstack(ctid);
/* Copy register state
Both parent and child return to the same place, and the code
following the clone syscall works out which is which, so we
don't need to worry about it.
The parent gets the child's new tid returned from clone, but the
child gets 0.
If the clone call specifies a NULL esp for the new thread, then
it actually gets a copy of the parent's esp.
*/
/* HACK: The clone call done by the Quadrics Elan3 driver specifies
clone flags of 0xF00, and it seems to rely on the assumption
that the child inherits a copy of the parent's GDT. Hence that
is passed as an arg to setup_child. */
setup_child( &ctst->arch, &ptst->arch, True /*VG_(clo_support_elan3)*/ );
/* Make sys_clone appear to have returned Success(0) in the
child. */
ctst->arch.vex.guest_EAX = 0;
if (esp != 0)
ctst->arch.vex.guest_ESP = esp;
ctst->os_state.parent = ptid;
/* inherit signal mask */
ctst->sig_mask = ptst->sig_mask;
ctst->tmp_sig_mask = ptst->sig_mask;
/* We don't really know where the client stack is, because its
allocated by the client. The best we can do is look at the
memory mappings and try to derive some useful information. We
assume that esp starts near its highest possible value, and can
only go down to the start of the mmaped segment. */
seg = VG_(find_segment)((Addr)esp);
if (seg) {
ctst->client_stack_highest_word = (Addr)VG_PGROUNDUP(esp);
ctst->client_stack_szB = ctst->client_stack_highest_word - seg->addr;
if (debug)
VG_(printf)("tid %d: guessed client stack range %p-%p\n",
ctid, seg->addr, VG_PGROUNDUP(esp));
} else {
VG_(message)(Vg_UserMsg, "!? New thread %d starts with ESP(%p) unmapped\n",
ctid, esp);
ctst->client_stack_szB = 0;
}
if (flags & VKI_CLONE_SETTLS) {
if (debug)
VG_(printf)("clone child has SETTLS: tls info at %p: idx=%d "
"base=%p limit=%x; esp=%p fs=%x gs=%x\n",
tlsinfo, tlsinfo->entry_number,
tlsinfo->base_addr, tlsinfo->limit,
ptst->arch.vex.guest_ESP,
ctst->arch.vex.guest_FS, ctst->arch.vex.guest_GS);
res = sys_set_thread_area(ctid, tlsinfo);
if (res.isError)
goto out;
}
flags &= ~VKI_CLONE_SETTLS;
/* start the thread with everything blocked */
VG_(sigprocmask)(VKI_SIG_SETMASK, &blockall, &savedmask);
/* Create the new thread */
eax = do_syscall_clone_x86_linux(
start_thread_NORETURN, stack, flags, &VG_(threads)[ctid],
child_tidptr, parent_tidptr, NULL
);
res = VG_(mk_SysRes_x86_linux)( eax );
VG_(sigprocmask)(VKI_SIG_SETMASK, &savedmask, NULL);
out:
if (res.isError) {
/* clone failed */
VG_(cleanup_thread)(&ctst->arch);
ctst->status = VgTs_Empty;
}
return res;
}
/* Do a clone which is really a fork() */
static SysRes do_fork_clone ( ThreadId tid,
UInt flags, Addr esp,
Int* parent_tidptr,
Int* child_tidptr )
{
vki_sigset_t fork_saved_mask;
vki_sigset_t mask;
SysRes res;
if (flags & (VKI_CLONE_SETTLS | VKI_CLONE_FS | VKI_CLONE_VM
| VKI_CLONE_FILES | VKI_CLONE_VFORK))
return VG_(mk_SysRes_Error)( VKI_EINVAL );
/* Block all signals during fork, so that we can fix things up in
the child without being interrupted. */
VG_(sigfillset)(&mask);
VG_(sigprocmask)(VKI_SIG_SETMASK, &mask, &fork_saved_mask);
/* Since this is the fork() form of clone, we don't need all that
VG_(clone) stuff */
res = VG_(do_syscall5)( __NR_clone, flags,
(UWord)NULL, (UWord)parent_tidptr,
(UWord)NULL, (UWord)child_tidptr );
if (!res.isError && res.val == 0) {
/* child */
VG_(do_atfork_child)(tid);
/* restore signal mask */
VG_(sigprocmask)(VKI_SIG_SETMASK, &fork_saved_mask, NULL);
}
else
if (!res.isError && res.val > 0) {
/* parent */
if (VG_(clo_trace_syscalls))
VG_(printf)(" clone(fork): process %d created child %d\n",
VG_(getpid)(), res.val);
/* restore signal mask */
VG_(sigprocmask)(VKI_SIG_SETMASK, &fork_saved_mask, NULL);
}
return res;
}
/* ---------------------------------------------------------------------
LDT/GDT simulation
------------------------------------------------------------------ */
/* Details of the LDT simulation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
When a program runs natively, the linux kernel allows each *thread*
in it to have its own LDT. Almost all programs never do this --
it's wildly unportable, after all -- and so the kernel never
allocates the structure, which is just as well as an LDT occupies
64k of memory (8192 entries of size 8 bytes).
A thread may choose to modify its LDT entries, by doing the
__NR_modify_ldt syscall. In such a situation the kernel will then
allocate an LDT structure for it. Each LDT entry is basically a
(base, limit) pair. A virtual address in a specific segment is
translated to a linear address by adding the segment's base value.
In addition, the virtual address must not exceed the limit value.
To use an LDT entry, a thread loads one of the segment registers
(%cs, %ss, %ds, %es, %fs, %gs) with the index of the LDT entry (0
.. 8191) it wants to use. In fact, the required value is (index <<
3) + 7, but that's not important right now. Any normal instruction
which includes an addressing mode can then be made relative to that
LDT entry by prefixing the insn with a so-called segment-override
prefix, a byte which indicates which of the 6 segment registers
holds the LDT index.
Now, a key constraint is that valgrind's address checks operate in
terms of linear addresses. So we have to explicitly translate
virtual addrs into linear addrs, and that means doing a complete
LDT simulation.
Calls to modify_ldt are intercepted. For each thread, we maintain
an LDT (with the same normally-never-allocated optimisation that
the kernel does). This is updated as expected via calls to
modify_ldt.
When a thread does an amode calculation involving a segment
override prefix, the relevant LDT entry for the thread is
consulted. It all works.
There is a conceptual problem, which appears when switching back to
native execution, either temporarily to pass syscalls to the
kernel, or permanently, when debugging V. Problem at such points
is that it's pretty pointless to copy the simulated machine's
segment registers to the real machine, because we'd also need to
copy the simulated LDT into the real one, and that's prohibitively
expensive.
Fortunately it looks like no syscalls rely on the segment regs or
LDT being correct, so we can get away with it. Apart from that the
simulation is pretty straightforward. All 6 segment registers are
tracked, although only %ds, %es, %fs and %gs are allowed as
prefixes. Perhaps it could be restricted even more than that -- I
am not sure what is and isn't allowed in user-mode.
*/
/* Translate a struct modify_ldt_ldt_s to a VexGuestX86SegDescr, using
the Linux kernel's logic (cut-n-paste of code in
linux/kernel/ldt.c). */
static
void translate_to_hw_format ( /* IN */ vki_modify_ldt_t* inn,
/* OUT */ VexGuestX86SegDescr* out,
Int oldmode )
{
UInt entry_1, entry_2;
vg_assert(8 == sizeof(VexGuestX86SegDescr));
if (0)
VG_(printf)("translate_to_hw_format: base %p, limit %d\n",
inn->base_addr, inn->limit );
/* Allow LDTs to be cleared by the user. */
if (inn->base_addr == 0 && inn->limit == 0) {
if (oldmode ||
(inn->contents == 0 &&
inn->read_exec_only == 1 &&
inn->seg_32bit == 0 &&
inn->limit_in_pages == 0 &&
inn->seg_not_present == 1 &&
inn->useable == 0 )) {
entry_1 = 0;
entry_2 = 0;
goto install;
}
}
entry_1 = ((inn->base_addr & 0x0000ffff) << 16) |
(inn->limit & 0x0ffff);
entry_2 = (inn->base_addr & 0xff000000) |
((inn->base_addr & 0x00ff0000) >> 16) |
(inn->limit & 0xf0000) |
((inn->read_exec_only ^ 1) << 9) |
(inn->contents << 10) |
((inn->seg_not_present ^ 1) << 15) |
(inn->seg_32bit << 22) |
(inn->limit_in_pages << 23) |
0x7000;
if (!oldmode)
entry_2 |= (inn->useable << 20);
/* Install the new entry ... */
install:
out->LdtEnt.Words.word1 = entry_1;
out->LdtEnt.Words.word2 = entry_2;
}
/* Create a zeroed-out GDT. */
static VexGuestX86SegDescr* alloc_zeroed_x86_GDT ( void )
{
Int nbytes = VEX_GUEST_X86_GDT_NENT * sizeof(VexGuestX86SegDescr);
return VG_(arena_calloc)(VG_AR_CORE, nbytes, 1);
}
/* Create a zeroed-out LDT. */
static VexGuestX86SegDescr* alloc_zeroed_x86_LDT ( void )
{
Int nbytes = VEX_GUEST_X86_LDT_NENT * sizeof(VexGuestX86SegDescr);
return VG_(arena_calloc)(VG_AR_CORE, nbytes, 1);
}
/* Free up an LDT or GDT allocated by the above fns. */
static void free_LDT_or_GDT ( VexGuestX86SegDescr* dt )
{
vg_assert(dt);
VG_(arena_free)(VG_AR_CORE, (void*)dt);
}
/* Copy contents between two existing LDTs. */
static void copy_LDT_from_to ( VexGuestX86SegDescr* src,
VexGuestX86SegDescr* dst )
{
Int i;
vg_assert(src);
vg_assert(dst);
for (i = 0; i < VEX_GUEST_X86_LDT_NENT; i++)
dst[i] = src[i];
}
/* Copy contents between two existing GDTs. */
static void copy_GDT_from_to ( VexGuestX86SegDescr* src,
VexGuestX86SegDescr* dst )
{
Int i;
vg_assert(src);
vg_assert(dst);
for (i = 0; i < VEX_GUEST_X86_GDT_NENT; i++)
dst[i] = src[i];
}
/* Free this thread's DTs, if it has any. */
static void deallocate_LGDTs_for_thread ( VexGuestX86State* vex )
{
vg_assert(sizeof(HWord) == sizeof(void*));
if (0)
VG_(printf)("deallocate_LGDTs_for_thread: "
"ldt = 0x%x, gdt = 0x%x\n",
vex->guest_LDT, vex->guest_GDT );
if (vex->guest_LDT != (HWord)NULL) {
free_LDT_or_GDT( (VexGuestX86SegDescr*)vex->guest_LDT );
vex->guest_LDT = (HWord)NULL;
}
if (vex->guest_GDT != (HWord)NULL) {
free_LDT_or_GDT( (VexGuestX86SegDescr*)vex->guest_GDT );
vex->guest_GDT = (HWord)NULL;
}
}
/*
* linux/kernel/ldt.c
*
* Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
* Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
*/
/*
* read_ldt() is not really atomic - this is not a problem since
* synchronization of reads and writes done to the LDT has to be
* assured by user-space anyway. Writes are atomic, to protect
* the security checks done on new descriptors.
*/
static
SysRes read_ldt ( ThreadId tid, UChar* ptr, UInt bytecount )
{
SysRes res;
UInt i, size;
UChar* ldt;
if (0)
VG_(printf)("read_ldt: tid = %d, ptr = %p, bytecount = %d\n",
tid, ptr, bytecount );
vg_assert(sizeof(HWord) == sizeof(VexGuestX86SegDescr*));
vg_assert(8 == sizeof(VexGuestX86SegDescr));
ldt = (Char*)(VG_(threads)[tid].arch.vex.guest_LDT);
res = VG_(mk_SysRes_Success)( 0 );
if (ldt == NULL)
/* LDT not allocated, meaning all entries are null */
goto out;
size = VEX_GUEST_X86_LDT_NENT * sizeof(VexGuestX86SegDescr);
if (size > bytecount)
size = bytecount;
res = VG_(mk_SysRes_Success)( size );
for (i = 0; i < size; i++)
ptr[i] = ldt[i];
out:
return res;
}
static
SysRes write_ldt ( ThreadId tid, void* ptr, UInt bytecount, Int oldmode )
{
SysRes res;
VexGuestX86SegDescr* ldt;
vki_modify_ldt_t* ldt_info;
if (0)
VG_(printf)("write_ldt: tid = %d, ptr = %p, "
"bytecount = %d, oldmode = %d\n",
tid, ptr, bytecount, oldmode );
vg_assert(8 == sizeof(VexGuestX86SegDescr));
vg_assert(sizeof(HWord) == sizeof(VexGuestX86SegDescr*));
ldt = (VexGuestX86SegDescr*)VG_(threads)[tid].arch.vex.guest_LDT;
ldt_info = (vki_modify_ldt_t*)ptr;
res = VG_(mk_SysRes_Error)( VKI_EINVAL );
if (bytecount != sizeof(vki_modify_ldt_t))
goto out;
res = VG_(mk_SysRes_Error)( VKI_EINVAL );
if (ldt_info->entry_number >= VEX_GUEST_X86_LDT_NENT)
goto out;
if (ldt_info->contents == 3) {
if (oldmode)
goto out;
if (ldt_info->seg_not_present == 0)
goto out;
}
/* If this thread doesn't have an LDT, we'd better allocate it
now. */
if (ldt == (HWord)NULL) {
ldt = alloc_zeroed_x86_LDT();
VG_(threads)[tid].arch.vex.guest_LDT = (HWord)ldt;
}
/* Install the new entry ... */
translate_to_hw_format ( ldt_info, &ldt[ldt_info->entry_number], oldmode );
res = VG_(mk_SysRes_Success)( 0 );
out:
return res;
}
static SysRes sys_modify_ldt ( ThreadId tid,
Int func, void* ptr, UInt bytecount )
{
SysRes ret = VG_(mk_SysRes_Error)( VKI_ENOSYS );
switch (func) {
case 0:
ret = read_ldt(tid, ptr, bytecount);
break;
case 1:
ret = write_ldt(tid, ptr, bytecount, 1);
break;
case 2:
VG_(unimplemented)("sys_modify_ldt: func == 2");
/* god knows what this is about */
/* ret = read_default_ldt(ptr, bytecount); */
/*UNREACHED*/
break;
case 0x11:
ret = write_ldt(tid, ptr, bytecount, 0);
break;
}
return ret;
}
static SysRes sys_set_thread_area ( ThreadId tid, vki_modify_ldt_t* info )
{
Int idx;
VexGuestX86SegDescr* gdt;
vg_assert(8 == sizeof(VexGuestX86SegDescr));
vg_assert(sizeof(HWord) == sizeof(VexGuestX86SegDescr*));
if (info == NULL)
return VG_(mk_SysRes_Error)( VKI_EFAULT );
gdt = (VexGuestX86SegDescr*)VG_(threads)[tid].arch.vex.guest_GDT;
/* If the thread doesn't have a GDT, allocate it now. */
if (!gdt) {
gdt = alloc_zeroed_x86_GDT();
VG_(threads)[tid].arch.vex.guest_GDT = (HWord)gdt;
}
idx = info->entry_number;
if (idx == -1) {
/* Find and use the first free entry. */
for (idx = 0; idx < VEX_GUEST_X86_GDT_NENT; idx++) {
if (gdt[idx].LdtEnt.Words.word1 == 0
&& gdt[idx].LdtEnt.Words.word2 == 0)
break;
}
if (idx == VEX_GUEST_X86_GDT_NENT)
return VG_(mk_SysRes_Error)( VKI_ESRCH );
} else if (idx < 0 || idx >= VEX_GUEST_X86_GDT_NENT) {
return VG_(mk_SysRes_Error)( VKI_EINVAL );
}
translate_to_hw_format(info, &gdt[idx], 0);
VG_TRACK( pre_mem_write, Vg_CoreSysCall, tid,
"set_thread_area(info->entry)",
(Addr) & info->entry_number, sizeof(unsigned int) );
info->entry_number = idx;
VG_TRACK( post_mem_write, Vg_CoreSysCall, tid,
(Addr) & info->entry_number, sizeof(unsigned int) );
return VG_(mk_SysRes_Success)( 0 );
}
static SysRes sys_get_thread_area ( ThreadId tid, vki_modify_ldt_t* info )
{
Int idx;
VexGuestX86SegDescr* gdt;
vg_assert(sizeof(HWord) == sizeof(VexGuestX86SegDescr*));
vg_assert(8 == sizeof(VexGuestX86SegDescr));
if (info == NULL)
return VG_(mk_SysRes_Error)( VKI_EFAULT );
idx = info->entry_number;
if (idx < 0 || idx >= VEX_GUEST_X86_GDT_NENT)
return VG_(mk_SysRes_Error)( VKI_EINVAL );
gdt = (VexGuestX86SegDescr*)VG_(threads)[tid].arch.vex.guest_GDT;
/* If the thread doesn't have a GDT, allocate it now. */
if (!gdt) {
gdt = alloc_zeroed_x86_GDT();
VG_(threads)[tid].arch.vex.guest_GDT = (HWord)gdt;
}
info->base_addr = ( gdt[idx].LdtEnt.Bits.BaseHi << 24 ) |
( gdt[idx].LdtEnt.Bits.BaseMid << 16 ) |
gdt[idx].LdtEnt.Bits.BaseLow;
info->limit = ( gdt[idx].LdtEnt.Bits.LimitHi << 16 ) |
gdt[idx].LdtEnt.Bits.LimitLow;
info->seg_32bit = gdt[idx].LdtEnt.Bits.Default_Big;
info->contents = ( gdt[idx].LdtEnt.Bits.Type >> 2 ) & 0x3;
info->read_exec_only = ( gdt[idx].LdtEnt.Bits.Type & 0x1 ) ^ 0x1;
info->limit_in_pages = gdt[idx].LdtEnt.Bits.Granularity;
info->seg_not_present = gdt[idx].LdtEnt.Bits.Pres ^ 0x1;
info->useable = gdt[idx].LdtEnt.Bits.Sys;
info->reserved = 0;
return VG_(mk_SysRes_Error)( 0 );
}
/* ---------------------------------------------------------------------
More thread stuff
------------------------------------------------------------------ */
void VG_(cleanup_thread) ( ThreadArchState* arch )
{
/* Release arch-specific resources held by this thread. */
/* On x86, we have to dump the LDT and GDT. */
deallocate_LGDTs_for_thread( &arch->vex );
}
static void setup_child ( /*OUT*/ ThreadArchState *child,
/*IN*/ ThreadArchState *parent,
Bool inherit_parents_GDT )
{
/* We inherit our parent's guest state. */
child->vex = parent->vex;
child->vex_shadow = parent->vex_shadow;
/* We inherit our parent's LDT. */
if (parent->vex.guest_LDT == (HWord)NULL) {
/* We hope this is the common case. */
child->vex.guest_LDT = (HWord)NULL;
} else {
/* No luck .. we have to take a copy of the parent's. */
child->vex.guest_LDT = (HWord)alloc_zeroed_x86_LDT();
copy_LDT_from_to( (VexGuestX86SegDescr*)parent->vex.guest_LDT,
(VexGuestX86SegDescr*)child->vex.guest_LDT );
}
/* Either we start with an empty GDT (the usual case) or inherit a
copy of our parents' one (Quadrics Elan3 driver -style clone
only). */
child->vex.guest_GDT = (HWord)NULL;
if (inherit_parents_GDT && parent->vex.guest_GDT != (HWord)NULL) {
child->vex.guest_GDT = (HWord)alloc_zeroed_x86_GDT();
copy_GDT_from_to( (VexGuestX86SegDescr*)parent->vex.guest_GDT,
(VexGuestX86SegDescr*)child->vex.guest_GDT );
}
}
/* ---------------------------------------------------------------------
PRE/POST wrappers for x86/Linux-specific syscalls
------------------------------------------------------------------ */
#define PRE(name) DEFN_PRE_TEMPLATE(x86_linux, name)
#define POST(name) DEFN_POST_TEMPLATE(x86_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(x86_linux, sys_socketcall);
DECL_TEMPLATE(x86_linux, sys_stat64);
DECL_TEMPLATE(x86_linux, sys_fstat64);
DECL_TEMPLATE(x86_linux, sys_lstat64);
DECL_TEMPLATE(x86_linux, sys_clone);
DECL_TEMPLATE(x86_linux, old_mmap);
DECL_TEMPLATE(x86_linux, sys_sigreturn);
DECL_TEMPLATE(x86_linux, sys_ipc);
DECL_TEMPLATE(x86_linux, sys_rt_sigreturn);
DECL_TEMPLATE(x86_linux, sys_modify_ldt);
DECL_TEMPLATE(x86_linux, sys_set_thread_area);
DECL_TEMPLATE(x86_linux, sys_get_thread_area);
DECL_TEMPLATE(x86_linux, sys_ptrace);
DECL_TEMPLATE(x86_linux, sys_sigaction);
DECL_TEMPLATE(x86_linux, old_select);
PRE(old_select)
{
/* struct sel_arg_struct {
unsigned long n;
fd_set *inp, *outp, *exp;
struct timeval *tvp;
};
*/
PRE_REG_READ1(long, "old_select", struct sel_arg_struct *, args);
PRE_MEM_READ( "old_select(args)", ARG1, 5*sizeof(UWord) );
*flags |= SfMayBlock;
{
UInt* arg_struct = (UInt*)ARG1;
UInt a1, a2, a3, a4, a5;
a1 = arg_struct[0];
a2 = arg_struct[1];
a3 = arg_struct[2];
a4 = arg_struct[3];
a5 = arg_struct[4];
PRINT("old_select ( %d, %p, %p, %p, %p )", a1,a2,a3,a4,a5);
if (a2 != (Addr)NULL)
PRE_MEM_READ( "old_select(readfds)", a2, a1/8 /* __FD_SETSIZE/8 */ );
if (a3 != (Addr)NULL)
PRE_MEM_READ( "old_select(writefds)", a3, a1/8 /* __FD_SETSIZE/8 */ );
if (a4 != (Addr)NULL)
PRE_MEM_READ( "old_select(exceptfds)", a4, a1/8 /* __FD_SETSIZE/8 */ );
if (a5 != (Addr)NULL)
PRE_MEM_READ( "old_select(timeout)", a5, sizeof(struct vki_timeval) );
}
}
PRE(sys_clone)
{
UInt cloneflags;
PRINT("sys_clone ( %x, %p, %p, %p, %p )",ARG1,ARG2,ARG3,ARG4,ARG5);
PRE_REG_READ5(int, "clone",
unsigned long, flags,
void *, child_stack,
int *, parent_tidptr,
vki_modify_ldt_t *, tlsinfo,
int *, child_tidptr);
if (ARG1 & VKI_CLONE_PARENT_SETTID) {
PRE_MEM_WRITE("clone(parent_tidptr)", ARG3, sizeof(Int));
if (!VG_(is_addressable)(ARG3, sizeof(Int), VKI_PROT_WRITE)) {
SET_STATUS_Failure( VKI_EFAULT );
return;
}
}
if (ARG1 & (VKI_CLONE_CHILD_SETTID | VKI_CLONE_CHILD_CLEARTID)) {
PRE_MEM_WRITE("clone(child_tidptr)", ARG5, sizeof(Int));
if (!VG_(is_addressable)(ARG5, sizeof(Int), VKI_PROT_WRITE)) {
SET_STATUS_Failure( VKI_EFAULT );
return;
}
}
if (ARG1 & VKI_CLONE_SETTLS) {
PRE_MEM_READ("clone(tls_user_desc)", ARG4, sizeof(vki_modify_ldt_t));
if (!VG_(is_addressable)(ARG4, sizeof(vki_modify_ldt_t), VKI_PROT_READ)) {
SET_STATUS_Failure( VKI_EFAULT );
return;
}
}
cloneflags = ARG1;
if (!ML_(client_signal_OK)(ARG1 & VKI_CSIGNAL)) {
SET_STATUS_Failure( VKI_EINVAL );
return;
}
/* Be ultra-paranoid and filter out any clone-variants we don't understand:
- ??? specifies clone flags of 0x100011
- ??? specifies clone flags of 0x1200011.
- NPTL specifies clone flags of 0x7D0F00.
- The Quadrics Elan3 driver specifies clone flags of 0xF00.
Everything else is rejected.
*/
if (
(cloneflags == 0x100011 || cloneflags == 0x1200011
|| cloneflags == 0x7D0F00
|| cloneflags == 0x790F00
|| cloneflags == 0x3D0F00
|| cloneflags == 0xF00
|| cloneflags == 0xF21)) {
/* OK */
}
else {
/* Nah. We don't like it. Go away. */
goto reject;
}
/* Only look at the flags we really care about */
switch (cloneflags & (VKI_CLONE_VM | VKI_CLONE_FS
| VKI_CLONE_FILES | VKI_CLONE_VFORK)) {
case VKI_CLONE_VM | VKI_CLONE_FS | VKI_CLONE_FILES:
/* thread creation */
SET_STATUS_from_SysRes(
do_clone(tid,
ARG1, /* flags */
(Addr)ARG2, /* child ESP */
(Int *)ARG3, /* parent_tidptr */
(Int *)ARG5, /* child_tidptr */
(vki_modify_ldt_t *)ARG4)); /* set_tls */
break;
case VKI_CLONE_VFORK | VKI_CLONE_VM: /* vfork */
/* FALLTHROUGH - assume vfork == fork */
cloneflags &= ~(VKI_CLONE_VFORK | VKI_CLONE_VM);
case 0: /* plain fork */
SET_STATUS_from_SysRes(
do_fork_clone(tid,
cloneflags, /* flags */
(Addr)ARG2, /* child ESP */
(Int *)ARG3, /* parent_tidptr */
(Int *)ARG5)); /* child_tidptr */
break;
default:
reject:
/* should we just ENOSYS? */
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg, "Unsupported clone() flags: 0x%x", ARG1);
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg, "NOTE: if this happened when attempting "
"to run code using");
VG_(message)(Vg_UserMsg, " Quadrics Elan3 user-space drivers,"
" you should re-run ");
VG_(message)(Vg_UserMsg, " with --support-elan3=yes.");
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg, "The only supported clone() uses are:");
VG_(message)(Vg_UserMsg, " - via a threads library (LinuxThreads or NPTL)");
VG_(message)(Vg_UserMsg, " - via the implementation of fork or vfork");
VG_(message)(Vg_UserMsg, " - for the Quadrics Elan3 user-space driver");
VG_(unimplemented)
("Valgrind does not support general clone().");
}
if (SUCCESS) {
if (ARG1 & VKI_CLONE_PARENT_SETTID)
POST_MEM_WRITE(ARG3, sizeof(Int));
if (ARG1 & (VKI_CLONE_CHILD_SETTID | VKI_CLONE_CHILD_CLEARTID))
POST_MEM_WRITE(ARG5, sizeof(Int));
/* Thread creation was successful; let the child have the chance
to run */
*flags |= SfYieldAfter;
}
}
PRE(sys_sigreturn)
{
ThreadState* tst;
PRINT("sigreturn ( )");
vg_assert(VG_(is_valid_tid)(tid));
vg_assert(tid >= 1 && tid < VG_N_THREADS);
vg_assert(VG_(is_running_thread)(tid));
/* Adjust esp to point to start of frame; skip back up over
sigreturn sequence's "popl %eax" and handler ret addr */
tst = VG_(get_ThreadState)(tid);
tst->arch.vex.guest_ESP -= sizeof(Addr)+sizeof(Word);
/* This is only so that the EIP is (might be) useful to report if
something goes wrong in the sigreturn */
ML_(fixup_guest_state_to_restart_syscall)(&tst->arch);
VG_(sigframe_destroy)(tid, False);
/* For unclear reasons, it appears we need the syscall to return
without changing %EAX. Since %EAX is the return value, and can
denote either success or failure, we must set up so that the
driver logic copies it back unchanged. Also, note %EAX is of
the guest registers written by VG_(sigframe_destroy). */
SET_STATUS_from_SysRes( VG_(mk_SysRes_x86_linux)( tst->arch.vex.guest_EAX ) );
/* Check to see if some any signals arose as a result of this. */
*flags |= SfPollAfter;
}
PRE(sys_rt_sigreturn)
{
ThreadState* tst;
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));
/* Adjust esp to point to start of frame; skip back up over handler
ret addr */
tst = VG_(get_ThreadState)(tid);
tst->arch.vex.guest_ESP -= sizeof(Addr);
/* This is only so that the EIP is (might be) useful to report if
something goes wrong in the sigreturn */
ML_(fixup_guest_state_to_restart_syscall)(&tst->arch);
VG_(sigframe_destroy)(tid, True);
/* For unclear reasons, it appears we need the syscall to return
without changing %EAX. Since %EAX is the return value, and can
denote either success or failure, we must set up so that the
driver logic copies it back unchanged. Also, note %EAX is of
the guest registers written by VG_(sigframe_destroy). */
SET_STATUS_from_SysRes( VG_(mk_SysRes_x86_linux)( tst->arch.vex.guest_EAX ) );
/* Check to see if some any signals arose as a result of this. */
*flags |= SfPollAfter;
}
PRE(sys_modify_ldt)
{
PRINT("sys_modify_ldt ( %d, %p, %d )", ARG1,ARG2,ARG3);
PRE_REG_READ3(int, "modify_ldt", int, func, void *, ptr,
unsigned long, bytecount);
if (ARG1 == 0) {
/* read the LDT into ptr */
PRE_MEM_WRITE( "modify_ldt(ptr)", ARG2, ARG3 );
}
if (ARG1 == 1 || ARG1 == 0x11) {
/* write the LDT with the entry pointed at by ptr */
PRE_MEM_READ( "modify_ldt(ptr)", ARG2, sizeof(vki_modify_ldt_t) );
}
/* "do" the syscall ourselves; the kernel never sees it */
SET_STATUS_from_SysRes( sys_modify_ldt( tid, ARG1, (void*)ARG2, ARG3 ) );
if (ARG1 == 0 && SUCCESS && RES > 0) {
POST_MEM_WRITE( ARG2, RES );
}
}
PRE(sys_set_thread_area)
{
PRINT("sys_set_thread_area ( %p )", ARG1);
PRE_REG_READ1(int, "set_thread_area", struct user_desc *, u_info)
PRE_MEM_READ( "set_thread_area(u_info)", ARG1, sizeof(vki_modify_ldt_t) );
/* "do" the syscall ourselves; the kernel never sees it */
SET_STATUS_from_SysRes( sys_set_thread_area( tid, (void *)ARG1 ) );
}
PRE(sys_get_thread_area)
{
PRINT("sys_get_thread_area ( %p )", ARG1);
PRE_REG_READ1(int, "get_thread_area", struct user_desc *, u_info)
PRE_MEM_WRITE( "get_thread_area(u_info)", ARG1, sizeof(vki_modify_ldt_t) );
/* "do" the syscall ourselves; the kernel never sees it */
SET_STATUS_from_SysRes( sys_get_thread_area( tid, (void *)ARG1 ) );
if (SUCCESS) {
POST_MEM_WRITE( ARG1, sizeof(vki_modify_ldt_t) );
}
}
// Parts of this are x86-specific, but the *PEEK* cases are generic.
// XXX: Why is the memory pointed to by ARG3 never checked?
PRE(sys_ptrace)
{
PRINT("sys_ptrace ( %d, %d, %p, %p )", ARG1,ARG2,ARG3,ARG4);
PRE_REG_READ4(int, "ptrace",
long, request, long, pid, long, addr, long, data);
switch (ARG1) {
case VKI_PTRACE_PEEKTEXT:
case VKI_PTRACE_PEEKDATA:
case VKI_PTRACE_PEEKUSR:
PRE_MEM_WRITE( "ptrace(peek)", ARG4,
sizeof (long));
break;
case VKI_PTRACE_GETREGS:
PRE_MEM_WRITE( "ptrace(getregs)", ARG4,
sizeof (struct vki_user_regs_struct));
break;
case VKI_PTRACE_GETFPREGS:
PRE_MEM_WRITE( "ptrace(getfpregs)", ARG4,
sizeof (struct vki_user_i387_struct));
break;
case VKI_PTRACE_GETFPXREGS:
PRE_MEM_WRITE( "ptrace(getfpxregs)", ARG4,
sizeof(struct vki_user_fxsr_struct) );
break;
case VKI_PTRACE_SETREGS:
PRE_MEM_READ( "ptrace(setregs)", ARG4,
sizeof (struct vki_user_regs_struct));
break;
case VKI_PTRACE_SETFPREGS:
PRE_MEM_READ( "ptrace(setfpregs)", ARG4,
sizeof (struct vki_user_i387_struct));
break;
case VKI_PTRACE_SETFPXREGS:
PRE_MEM_READ( "ptrace(setfpxregs)", ARG4,
sizeof(struct vki_user_fxsr_struct) );
break;
default:
break;
}
}
POST(sys_ptrace)
{
switch (ARG1) {
case VKI_PTRACE_PEEKTEXT:
case VKI_PTRACE_PEEKDATA:
case VKI_PTRACE_PEEKUSR:
POST_MEM_WRITE( ARG4, sizeof (long));
break;
case VKI_PTRACE_GETREGS:
POST_MEM_WRITE( ARG4, sizeof (struct vki_user_regs_struct));
break;
case VKI_PTRACE_GETFPREGS:
POST_MEM_WRITE( ARG4, sizeof (struct vki_user_i387_struct));
break;
case VKI_PTRACE_GETFPXREGS:
POST_MEM_WRITE( ARG4, sizeof(struct vki_user_fxsr_struct) );
break;
default:
break;
}
}
static Addr deref_Addr ( ThreadId tid, Addr a, Char* s )
{
Addr* a_p = (Addr*)a;
PRE_MEM_READ( s, (Addr)a_p, sizeof(Addr) );
return *a_p;
}
PRE(sys_ipc)
{
PRINT("sys_ipc ( %d, %d, %d, %d, %p, %d )", ARG1,ARG2,ARG3,ARG4,ARG5,ARG6);
// XXX: this is simplistic -- some args are not used in all circumstances.
PRE_REG_READ6(int, "ipc",
vki_uint, call, int, first, int, second, int, third,
void *, ptr, long, fifth)
switch (ARG1 /* call */) {
case VKI_SEMOP:
ML_(generic_PRE_sys_semop)( tid, ARG2, ARG5, ARG3 );
*flags |= SfMayBlock;
break;
case VKI_SEMGET:
break;
case VKI_SEMCTL:
{
UWord arg = deref_Addr( tid, ARG5, "semctl(arg)" );
ML_(generic_PRE_sys_semctl)( tid, ARG2, ARG3, ARG4, arg );
break;
}
case VKI_SEMTIMEDOP:
ML_(generic_PRE_sys_semtimedop)( tid, ARG2, ARG5, ARG3, ARG6 );
*flags |= SfMayBlock;
break;
case VKI_MSGSND:
ML_(generic_PRE_sys_msgsnd)( tid, ARG2, ARG5, ARG3, ARG4 );
if ((ARG4 & VKI_IPC_NOWAIT) == 0)
*flags |= SfMayBlock;
break;
case VKI_MSGRCV:
{
Addr msgp;
Word msgtyp;
msgp = deref_Addr( tid,
(Addr) (&((struct vki_ipc_kludge *)ARG5)->msgp),
"msgrcv(msgp)" );
msgtyp = deref_Addr( tid,
(Addr) (&((struct vki_ipc_kludge *)ARG5)->msgtyp),
"msgrcv(msgp)" );
ML_(generic_PRE_sys_msgrcv)( tid, ARG2, msgp, ARG3, msgtyp, ARG4 );
if ((ARG4 & VKI_IPC_NOWAIT) == 0)
*flags |= SfMayBlock;
break;
}
case VKI_MSGGET:
break;
case VKI_MSGCTL:
ML_(generic_PRE_sys_msgctl)( tid, ARG2, ARG3, ARG5 );
break;
case VKI_SHMAT:
{
UWord w;
PRE_MEM_WRITE( "shmat(raddr)", ARG4, sizeof(Addr) );
w = ML_(generic_PRE_sys_shmat)( tid, ARG2, ARG5, ARG3 );
if (w == 0)
SET_STATUS_Failure( VKI_EINVAL );
else
ARG5 = w;
break;
}
case VKI_SHMDT:
if (!ML_(generic_PRE_sys_shmdt)(tid, ARG5))
SET_STATUS_Failure( VKI_EINVAL );
break;
case VKI_SHMGET:
break;
case VKI_SHMCTL: /* IPCOP_shmctl */
ML_(generic_PRE_sys_shmctl)( tid, ARG2, ARG3, ARG5 );
break;
default:
VG_(message)(Vg_DebugMsg, "FATAL: unhandled syscall(ipc) %d", ARG1 );
VG_(core_panic)("... bye!\n");
break; /*NOTREACHED*/
}
}
POST(sys_ipc)
{
vg_assert(SUCCESS);
switch (ARG1 /* call */) {
case VKI_SEMOP:
case VKI_SEMGET:
break;
case VKI_SEMCTL:
{
UWord arg = deref_Addr( tid, ARG5, "semctl(arg)" );
ML_(generic_PRE_sys_semctl)( tid, ARG2, ARG3, ARG4, arg );
break;
}
case VKI_SEMTIMEDOP:
case VKI_MSGSND:
break;
case VKI_MSGRCV:
{
Addr msgp;
Word msgtyp;
msgp = deref_Addr( tid,
(Addr) (&((struct vki_ipc_kludge *)ARG5)->msgp),
"msgrcv(msgp)" );
msgtyp = deref_Addr( tid,
(Addr) (&((struct vki_ipc_kludge *)ARG5)->msgtyp),
"msgrcv(msgp)" );
ML_(generic_POST_sys_msgrcv)( tid, RES, ARG2, msgp, ARG3, msgtyp, ARG4 );
break;
}
case VKI_MSGGET:
break;
case VKI_MSGCTL:
ML_(generic_POST_sys_msgctl)( tid, RES, ARG2, ARG3, ARG5 );
break;
case VKI_SHMAT:
{
Addr addr;
/* force readability. before the syscall it is
* indeed uninitialized, as can be seen in
* glibc/sysdeps/unix/sysv/linux/shmat.c */
POST_MEM_WRITE( ARG4, sizeof( Addr ) );
addr = deref_Addr ( tid, ARG4, "shmat(addr)" );
if ( addr > 0 ) {
ML_(generic_POST_sys_shmat)( tid, addr, ARG2, ARG5, ARG3 );
}
break;
}
case VKI_SHMDT:
ML_(generic_POST_sys_shmdt)( tid, RES, ARG5 );
break;
case VKI_SHMGET:
break;
case VKI_SHMCTL:
ML_(generic_POST_sys_shmctl)( tid, RES, ARG2, ARG3, ARG5 );
break;
default:
VG_(message)(Vg_DebugMsg,
"FATAL: unhandled syscall(ipc) %d",
ARG1 );
VG_(core_panic)("... bye!\n");
break; /*NOTREACHED*/
}
}
PRE(old_mmap)
{
/* struct mmap_arg_struct {
unsigned long addr;
unsigned long len;
unsigned long prot;
unsigned long flags;
unsigned long fd;
unsigned long offset;
}; */
UWord a1, a2, a3, a4, a5, a6;
UWord* args = (UWord*)ARG1;
PRE_REG_READ1(long, "old_mmap", struct mmap_arg_struct *, args);
PRE_MEM_READ( "old_mmap(args)", (Addr)args, 6*sizeof(UWord) );
a1 = args[0];
a2 = args[1];
a3 = args[2];
a4 = args[3];
a5 = args[4];
a6 = args[5];
PRINT("old_mmap ( %p, %llu, %d, %d, %d, %d )",
a1, (ULong)a2, a3, a4, a5, a6 );
if (a2 == 0) {
/* SuSV3 says: If len is zero, mmap() shall fail and no mapping
shall be established. */
SET_STATUS_Failure( VKI_EINVAL );
return;
}
if (/*(a4 & VKI_MAP_FIXED) &&*/ (0 != (a1 & (VKI_PAGE_SIZE-1)))) {
/* zap any misaligned addresses. */
SET_STATUS_Failure( VKI_EINVAL );
return;
}
if (a4 & VKI_MAP_FIXED) {
if (!ML_(valid_client_addr)(a1, a2, tid, "old_mmap")) {
PRINT("old_mmap failing: %p-%p\n", a1, a1+a2);
SET_STATUS_Failure( VKI_ENOMEM );
}
} else {
Addr a = VG_(find_map_space)(a1, a2, True);
if (0) VG_(printf)("find_map_space(%p, %d) -> %p\n",a1,a2,a);
if (a == 0 && a1 != 0) {
a1 = VG_(find_map_space)(0, a2, True);
}
else
a1 = a;
if (a1 == 0)
SET_STATUS_Failure( VKI_ENOMEM );
else
a4 |= VKI_MAP_FIXED;
}
if (! FAILURE) {
SysRes res = VG_(mmap_native)((void*)a1, a2, a3, a4, a5, a6);
SET_STATUS_from_SysRes(res);
if (!res.isError) {
vg_assert(ML_(valid_client_addr)(res.val, a2, tid, "old_mmap"));
ML_(mmap_segment)( (Addr)res.val, a2, a3, a4, a5, a6 );
}
}
if (0)
VG_(printf)("old_mmap( %p, fixed %d ) -> %s(%p)\n",
args[0],
args[3]&VKI_MAP_FIXED,
FAILURE ? "Fail" : "Success", RES_unchecked);
/* Stay sane */
if (SUCCESS && (args[3] & VKI_MAP_FIXED))
vg_assert(RES == args[0]);
}
// 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 ( %p(%s), %p )",ARG1,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 ( %p, %p )",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_fstat64)
{
PRINT("sys_fstat64 ( %d, %p )",ARG1,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_socketcall)
{
# define ARG2_0 (((UWord*)ARG2)[0])
# define ARG2_1 (((UWord*)ARG2)[1])
# define ARG2_2 (((UWord*)ARG2)[2])
# define ARG2_3 (((UWord*)ARG2)[3])
# define ARG2_4 (((UWord*)ARG2)[4])
# define ARG2_5 (((UWord*)ARG2)[5])
*flags |= SfMayBlock;
PRINT("sys_socketcall ( %d, %p )",ARG1,ARG2);
PRE_REG_READ2(long, "socketcall", int, call, unsigned long *, args);
switch (ARG1 /* request */) {
case VKI_SYS_SOCKETPAIR:
/* int socketpair(int d, int type, int protocol, int sv[2]); */
PRE_MEM_READ( "socketcall.socketpair(args)", ARG2, 4*sizeof(Addr) );
ML_(generic_PRE_sys_socketpair)( tid, ARG2_0, ARG2_1, ARG2_2, ARG2_3 );
break;
case VKI_SYS_SOCKET:
/* int socket(int domain, int type, int protocol); */
PRE_MEM_READ( "socketcall.socket(args)", ARG2, 3*sizeof(Addr) );
break;
case VKI_SYS_BIND:
/* int bind(int sockfd, struct sockaddr *my_addr,
int addrlen); */
PRE_MEM_READ( "socketcall.bind(args)", ARG2, 3*sizeof(Addr) );
ML_(generic_PRE_sys_bind)( tid, ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_LISTEN:
/* int listen(int s, int backlog); */
PRE_MEM_READ( "socketcall.listen(args)", ARG2, 2*sizeof(Addr) );
break;
case VKI_SYS_ACCEPT: {
/* int accept(int s, struct sockaddr *addr, int *addrlen); */
PRE_MEM_READ( "socketcall.accept(args)", ARG2, 3*sizeof(Addr) );
ML_(generic_PRE_sys_accept)( tid, ARG2_0, ARG2_1, ARG2_2 );
break;
}
case VKI_SYS_SENDTO:
/* int sendto(int s, const void *msg, int len,
unsigned int flags,
const struct sockaddr *to, int tolen); */
PRE_MEM_READ( "socketcall.sendto(args)", ARG2, 6*sizeof(Addr) );
ML_(generic_PRE_sys_sendto)( tid, ARG2_0, ARG2_1, ARG2_2,
ARG2_3, ARG2_4, ARG2_5 );
break;
case VKI_SYS_SEND:
/* int send(int s, const void *msg, size_t len, int flags); */
PRE_MEM_READ( "socketcall.send(args)", ARG2, 4*sizeof(Addr) );
ML_(generic_PRE_sys_send)( tid, ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_RECVFROM:
/* int recvfrom(int s, void *buf, int len, unsigned int flags,
struct sockaddr *from, int *fromlen); */
PRE_MEM_READ( "socketcall.recvfrom(args)", ARG2, 6*sizeof(Addr) );
ML_(generic_PRE_sys_recvfrom)( tid, ARG2_0, ARG2_1, ARG2_2,
ARG2_3, ARG2_4, ARG2_5 );
break;
case VKI_SYS_RECV:
/* int recv(int s, void *buf, int len, unsigned int flags); */
/* man 2 recv says:
The recv call is normally used only on a connected socket
(see connect(2)) and is identical to recvfrom with a NULL
from parameter.
*/
PRE_MEM_READ( "socketcall.recv(args)", ARG2, 4*sizeof(Addr) );
ML_(generic_PRE_sys_recv)( tid, ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_CONNECT:
/* int connect(int sockfd,
struct sockaddr *serv_addr, int addrlen ); */
PRE_MEM_READ( "socketcall.connect(args)", ARG2, 3*sizeof(Addr) );
ML_(generic_PRE_sys_connect)( tid, ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_SETSOCKOPT:
/* int setsockopt(int s, int level, int optname,
const void *optval, int optlen); */
PRE_MEM_READ( "socketcall.setsockopt(args)", ARG2, 5*sizeof(Addr) );
ML_(generic_PRE_sys_setsockopt)( tid, ARG2_0, ARG2_1, ARG2_2,
ARG2_3, ARG2_4 );
break;
case VKI_SYS_GETSOCKOPT:
/* int getsockopt(int s, int level, int optname,
void *optval, socklen_t *optlen); */
PRE_MEM_READ( "socketcall.getsockopt(args)", ARG2, 5*sizeof(Addr) );
ML_(generic_PRE_sys_getsockopt)( tid, ARG2_0, ARG2_1, ARG2_2,
ARG2_3, ARG2_4 );
break;
case VKI_SYS_GETSOCKNAME:
/* int getsockname(int s, struct sockaddr* name, int* namelen) */
PRE_MEM_READ( "socketcall.getsockname(args)", ARG2, 3*sizeof(Addr) );
ML_(generic_PRE_sys_getsockname)( tid, ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_GETPEERNAME:
/* int getpeername(int s, struct sockaddr* name, int* namelen) */
PRE_MEM_READ( "socketcall.getpeername(args)", ARG2, 3*sizeof(Addr) );
ML_(generic_PRE_sys_getpeername)( tid, ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_SHUTDOWN:
/* int shutdown(int s, int how); */
PRE_MEM_READ( "socketcall.shutdown(args)", ARG2, 2*sizeof(Addr) );
break;
case VKI_SYS_SENDMSG: {
/* int sendmsg(int s, const struct msghdr *msg, int flags); */
/* this causes warnings, and I don't get why. glibc bug?
* (after all it's glibc providing the arguments array)
PRE_MEM_READ( "socketcall.sendmsg(args)", ARG2, 3*sizeof(Addr) );
*/
ML_(generic_PRE_sys_sendmsg)( tid, ARG2_0, ARG2_1 );
break;
}
case VKI_SYS_RECVMSG: {
/* int recvmsg(int s, struct msghdr *msg, int flags); */
/* this causes warnings, and I don't get why. glibc bug?
* (after all it's glibc providing the arguments array)
PRE_MEM_READ("socketcall.recvmsg(args)", ARG2, 3*sizeof(Addr) );
*/
ML_(generic_PRE_sys_recvmsg)( tid, ARG2_0, ARG2_1 );
break;
}
default:
VG_(message)(Vg_DebugMsg,"Warning: unhandled socketcall 0x%x",ARG1);
SET_STATUS_Failure( VKI_EINVAL );
break;
}
# undef ARG2_0
# undef ARG2_1
# undef ARG2_2
# undef ARG2_3
# undef ARG2_4
# undef ARG2_5
}
POST(sys_socketcall)
{
# define ARG2_0 (((UWord*)ARG2)[0])
# define ARG2_1 (((UWord*)ARG2)[1])
# define ARG2_2 (((UWord*)ARG2)[2])
# define ARG2_3 (((UWord*)ARG2)[3])
# define ARG2_4 (((UWord*)ARG2)[4])
# define ARG2_5 (((UWord*)ARG2)[5])
SysRes r;
vg_assert(SUCCESS);
switch (ARG1 /* request */) {
case VKI_SYS_SOCKETPAIR:
r = ML_(generic_POST_sys_socketpair)(
tid, VG_(mk_SysRes_Success)(RES),
ARG2_0, ARG2_1, ARG2_2, ARG2_3
);
SET_STATUS_from_SysRes(r);
break;
case VKI_SYS_SOCKET:
r = ML_(generic_POST_sys_socket)( tid, VG_(mk_SysRes_Success)(RES) );
SET_STATUS_from_SysRes(r);
break;
case VKI_SYS_BIND:
/* int bind(int sockfd, struct sockaddr *my_addr,
int addrlen); */
break;
case VKI_SYS_LISTEN:
/* int listen(int s, int backlog); */
break;
case VKI_SYS_ACCEPT:
/* int accept(int s, struct sockaddr *addr, int *addrlen); */
r = ML_(generic_POST_sys_accept)( tid, VG_(mk_SysRes_Success)(RES),
ARG2_0, ARG2_1, ARG2_2 );
SET_STATUS_from_SysRes(r);
break;
case VKI_SYS_SENDTO:
break;
case VKI_SYS_SEND:
break;
case VKI_SYS_RECVFROM:
ML_(generic_POST_sys_recvfrom)( tid, VG_(mk_SysRes_Success)(RES),
ARG2_0, ARG2_1, ARG2_2,
ARG2_3, ARG2_4, ARG2_5 );
break;
case VKI_SYS_RECV:
ML_(generic_POST_sys_recv)( tid, RES, ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_CONNECT:
break;
case VKI_SYS_SETSOCKOPT:
break;
case VKI_SYS_GETSOCKOPT:
ML_(generic_POST_sys_getsockopt)( tid, VG_(mk_SysRes_Success)(RES),
ARG2_0, ARG2_1,
ARG2_2, ARG2_3, ARG2_4 );
break;
case VKI_SYS_GETSOCKNAME:
ML_(generic_POST_sys_getsockname)( tid, VG_(mk_SysRes_Success)(RES),
ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_GETPEERNAME:
ML_(generic_POST_sys_getpeername)( tid, VG_(mk_SysRes_Success)(RES),
ARG2_0, ARG2_1, ARG2_2 );
break;
case VKI_SYS_SHUTDOWN:
break;
case VKI_SYS_SENDMSG:
break;
case VKI_SYS_RECVMSG:
ML_(generic_POST_sys_recvmsg)( tid, ARG2_0, ARG2_1 );
break;
default:
VG_(message)(Vg_DebugMsg,"FATAL: unhandled socketcall 0x%x",ARG1);
VG_(core_panic)("... bye!\n");
break; /*NOTREACHED*/
}
# undef ARG2_0
# undef ARG2_1
# undef ARG2_2
# undef ARG2_3
# undef ARG2_4
# undef ARG2_5
}
/* Convert from non-RT to RT sigset_t's */
static
void convert_sigset_to_rt(const vki_old_sigset_t *oldset, vki_sigset_t *set)
{
VG_(sigemptyset)(set);
set->sig[0] = *oldset;
}
PRE(sys_sigaction)
{
struct vki_sigaction new, old;
struct vki_sigaction *newp, *oldp;
PRINT("sys_sigaction ( %d, %p, %p )", ARG1,ARG2,ARG3);
PRE_REG_READ3(int, "sigaction",
int, signum, const struct old_sigaction *, act,
struct old_sigaction *, oldact);
newp = oldp = NULL;
if (ARG2 != 0)
PRE_MEM_READ( "sigaction(act)", ARG2, sizeof(struct vki_old_sigaction));
if (ARG3 != 0) {
PRE_MEM_WRITE( "sigaction(oldact)", ARG3, sizeof(struct vki_old_sigaction));
oldp = &old;
}
//jrs 20050207: what?! how can this make any sense?
//if (VG_(is_kerror)(SYSRES))
// return;
if (ARG2 != 0) {
struct vki_old_sigaction *oldnew = (struct vki_old_sigaction *)ARG2;
new.ksa_handler = oldnew->ksa_handler;
new.sa_flags = oldnew->sa_flags;
new.sa_restorer = oldnew->sa_restorer;
convert_sigset_to_rt(&oldnew->sa_mask, &new.sa_mask);
newp = &new;
}
SET_STATUS_from_SysRes( VG_(do_sys_sigaction)(ARG1, newp, oldp) );
if (ARG3 != 0 && SUCCESS && RES == 0) {
struct vki_old_sigaction *oldold = (struct vki_old_sigaction *)ARG3;
oldold->ksa_handler = oldp->ksa_handler;
oldold->sa_flags = oldp->sa_flags;
oldold->sa_restorer = oldp->sa_restorer;
oldold->sa_mask = oldp->sa_mask.sig[0];
}
}
POST(sys_sigaction)
{
vg_assert(SUCCESS);
if (RES == 0 && ARG3 != 0)
POST_MEM_WRITE( ARG3, sizeof(struct vki_old_sigaction));
}
#undef PRE
#undef POST
/* ---------------------------------------------------------------------
The x86/Linux syscall table
------------------------------------------------------------------ */
/* Add an x86-linux specific wrapper to a syscall table. */
#define PLAX_(sysno, name) WRAPPER_ENTRY_X_(x86_linux, sysno, name)
#define PLAXY(sysno, name) WRAPPER_ENTRY_XY(x86_linux, sysno, name)
// This table maps from __NR_xxx syscall numbers (from
// linux/include/asm-i386/unistd.h) to the appropriate PRE/POST sys_foo()
// wrappers on x86 (as per sys_call_table in linux/arch/i386/kernel/entry.S).
//
// For those syscalls not handled by Valgrind, the annotation indicate its
// arch/OS combination, eg. */* (generic), */Linux (Linux only), ?/?
// (unknown).
const SyscallTableEntry ML_(syscall_table)[] = {
//zz // (restart_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
//zz // (__NR_lchown, sys_lchown16), // 16 ## P
GENX_(__NR_break, sys_ni_syscall), // 17
//zz // (__NR_oldstat, sys_stat), // 18 (obsolete)
GENX_(__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_setuid16), // 23 ## P
GENX_(__NR_getuid, sys_getuid16), // 24 ## P
//zz
//zz // (__NR_stime, sys_stime), // 25 * (SVr4,SVID,X/OPEN)
PLAXY(__NR_ptrace, sys_ptrace), // 26
GENX_(__NR_alarm, sys_alarm), // 27
//zz // (__NR_oldfstat, sys_fstat), // 28 * L -- obsolete
GENX_(__NR_pause, sys_pause), // 29
GENX_(__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
GENXY(__NR_pipe, sys_pipe), // 42
GENXY(__NR_times, sys_times), // 43
GENX_(__NR_prof, sys_ni_syscall), // 44
//zz
GENX_(__NR_brk, sys_brk), // 45
GENX_(__NR_setgid, sys_setgid16), // 46
GENX_(__NR_getgid, sys_getgid16), // 47
//zz // (__NR_signal, sys_signal), // 48 */* (ANSI C)
GENX_(__NR_geteuid, sys_geteuid16), // 49
GENX_(__NR_getegid, sys_getegid16), // 50
GENX_(__NR_acct, sys_acct), // 51
LINX_(__NR_umount2, sys_umount), // 52
GENX_(__NR_lock, sys_ni_syscall), // 53
GENXY(__NR_ioctl, sys_ioctl), // 54
GENXY(__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
//zz // (__NR_oldolduname, sys_olduname), // 59 Linux -- obsolete
//zz
GENX_(__NR_umask, sys_umask), // 60
GENX_(__NR_chroot, sys_chroot), // 61
//zz // (__NR_ustat, sys_ustat) // 62 SVr4 -- deprecated
GENXY(__NR_dup2, sys_dup2), // 63
GENX_(__NR_getppid, sys_getppid), // 64
GENX_(__NR_getpgrp, sys_getpgrp), // 65
GENX_(__NR_setsid, sys_setsid), // 66
PLAXY(__NR_sigaction, sys_sigaction), // 67
//zz // (__NR_sgetmask, sys_sgetmask), // 68 */* (ANSI C)
//zz // (__NR_ssetmask, sys_ssetmask), // 69 */* (ANSI C)
//zz
GENX_(__NR_setreuid, sys_setreuid16), // 70
GENX_(__NR_setregid, sys_setregid16), // 71
//zz GENX_(__NR_sigsuspend, sys_sigsuspend), // 72
GENXY(__NR_sigpending, sys_sigpending), // 73
//zz // (__NR_sethostname, sys_sethostname), // 74 */*
//zz
GENX_(__NR_setrlimit, sys_setrlimit), // 75
GENXY(__NR_getrlimit, sys_old_getrlimit), // 76
GENXY(__NR_getrusage, sys_getrusage), // 77
GENXY(__NR_gettimeofday, sys_gettimeofday), // 78
GENX_(__NR_settimeofday, sys_settimeofday), // 79
GENXY(__NR_getgroups, sys_getgroups16), // 80
GENX_(__NR_setgroups, sys_setgroups16), // 81
PLAX_(__NR_select, old_select), // 82
GENX_(__NR_symlink, sys_symlink), // 83
//zz // (__NR_oldlstat, sys_lstat), // 84 -- obsolete
//zz
GENX_(__NR_readlink, sys_readlink), // 85
//zz // (__NR_uselib, sys_uselib), // 86 */Linux
//zz // (__NR_swapon, sys_swapon), // 87 */Linux
//zz // (__NR_reboot, sys_reboot), // 88 */Linux
//zz // (__NR_readdir, old_readdir), // 89 -- superseded
//zz
PLAX_(__NR_mmap, old_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_fchown16), // 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
PLAXY(__NR_socketcall, sys_socketcall), // 102 x86/Linux-only
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
//zz // (__NR_olduname, sys_uname), // 109 -- obsolete
//zz
GENX_(__NR_iopl, sys_iopl), // 110
LINX_(__NR_vhangup, sys_vhangup), // 111
GENX_(__NR_idle, sys_ni_syscall), // 112
//zz // (__NR_vm86old, sys_vm86old), // 113 x86/Linux-only
GENXY(__NR_wait4, sys_wait4), // 114
//zz
//zz // (__NR_swapoff, sys_swapoff), // 115 */Linux
LINXY(__NR_sysinfo, sys_sysinfo), // 116
PLAXY(__NR_ipc, sys_ipc), // 117
GENX_(__NR_fsync, sys_fsync), // 118
PLAX_(__NR_sigreturn, sys_sigreturn), // 119 ?/Linux
PLAX_(__NR_clone, sys_clone), // 120
//zz // (__NR_setdomainname, sys_setdomainname), // 121 */*(?)
GENXY(__NR_uname, sys_newuname), // 122
PLAX_(__NR_modify_ldt, sys_modify_ldt), // 123
//zz LINXY(__NR_adjtimex, sys_adjtimex), // 124
//zz
GENXY(__NR_mprotect, sys_mprotect), // 125
GENXY(__NR_sigprocmask, sys_sigprocmask), // 126
//zz // Nb: create_module() was removed 2.4-->2.6
GENX_(__NR_create_module, sys_ni_syscall), // 127
GENX_(__NR_init_module, sys_init_module), // 128
//zz // (__NR_delete_module, sys_delete_module), // 129 (*/Linux)?
//zz
//zz // Nb: get_kernel_syms() was removed 2.4-->2.6
GENX_(__NR_get_kernel_syms, sys_ni_syscall), // 130
GENX_(__NR_quotactl, sys_quotactl), // 131
GENX_(__NR_getpgid, sys_getpgid), // 132
GENX_(__NR_fchdir, sys_fchdir), // 133
//zz // (__NR_bdflush, sys_bdflush), // 134 */Linux
//zz
//zz // (__NR_sysfs, sys_sysfs), // 135 SVr4
LINX_(__NR_personality, sys_personality), // 136
GENX_(__NR_afs_syscall, sys_ni_syscall), // 137
LINX_(__NR_setfsuid, sys_setfsuid16), // 138
LINX_(__NR_setfsgid, sys_setfsgid16), // 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
GENX_(__NR_getsid, sys_getsid), // 147
GENX_(__NR_fdatasync, sys_fdatasync), // 148
LINXY(__NR__sysctl, sys_sysctl), // 149
GENX_(__NR_mlock, sys_mlock), // 150
GENX_(__NR_munlock, sys_munlock), // 151
GENX_(__NR_mlockall, sys_mlockall), // 152
GENX_(__NR_munlockall, sys_munlockall), // 153
GENXY(__NR_sched_setparam, sys_sched_setparam), // 154
GENXY(__NR_sched_getparam, sys_sched_getparam), // 155
GENX_(__NR_sched_setscheduler, sys_sched_setscheduler), // 156
GENX_(__NR_sched_getscheduler, sys_sched_getscheduler), // 157
GENX_(__NR_sched_yield, sys_sched_yield), // 158
GENX_(__NR_sched_get_priority_max, sys_sched_get_priority_max),// 159
GENX_(__NR_sched_get_priority_min, sys_sched_get_priority_min),// 160
//zz // (__NR_sched_rr_get_interval, sys_sched_rr_get_interval), // 161 */*
GENXY(__NR_nanosleep, sys_nanosleep), // 162
GENX_(__NR_mremap, sys_mremap), // 163
LINX_(__NR_setresuid, sys_setresuid16), // 164
LINXY(__NR_getresuid, sys_getresuid16), // 165
//zz // (__NR_vm86, sys_vm86), // 166 x86/Linux-only
GENX_(__NR_query_module, sys_ni_syscall), // 167
GENXY(__NR_poll, sys_poll), // 168
//zz // (__NR_nfsservctl, sys_nfsservctl), // 169 */Linux
//zz
LINX_(__NR_setresgid, sys_setresgid16), // 170
LINXY(__NR_getresgid, sys_getresgid16), // 171
LINX_(__NR_prctl, sys_prctl), // 172
PLAX_(__NR_rt_sigreturn, sys_rt_sigreturn), // 173 x86/Linux only?
GENXY(__NR_rt_sigaction, sys_rt_sigaction), // 174
GENXY(__NR_rt_sigprocmask, sys_rt_sigprocmask), // 175
GENXY(__NR_rt_sigpending, sys_rt_sigpending), // 176
GENXY(__NR_rt_sigtimedwait, sys_rt_sigtimedwait),// 177
GENXY(__NR_rt_sigqueueinfo, sys_rt_sigqueueinfo),// 178
GENX_(__NR_rt_sigsuspend, sys_rt_sigsuspend), // 179
GENXY(__NR_pread64, sys_pread64), // 180
GENX_(__NR_pwrite64, sys_pwrite64), // 181
GENX_(__NR_chown, sys_chown16), // 182
GENXY(__NR_getcwd, sys_getcwd), // 183
GENXY(__NR_capget, sys_capget), // 184
GENX_(__NR_capset, sys_capset), // 185
GENXY(__NR_sigaltstack, sys_sigaltstack), // 186
LINXY(__NR_sendfile, sys_sendfile), // 187
GENXY(__NR_getpmsg, sys_getpmsg), // 188
GENX_(__NR_putpmsg, sys_putpmsg), // 189
// Nb: we treat vfork as fork
GENX_(__NR_vfork, sys_fork), // 190
GENXY(__NR_ugetrlimit, sys_getrlimit), // 191
GENXY(__NR_mmap2, sys_mmap2), // 192
GENX_(__NR_truncate64, sys_truncate64), // 193
GENX_(__NR_ftruncate64, sys_ftruncate64), // 194
PLAXY(__NR_stat64, sys_stat64), // 195
PLAXY(__NR_lstat64, sys_lstat64), // 196
PLAXY(__NR_fstat64, sys_fstat64), // 197
GENX_(__NR_lchown32, sys_lchown), // 198
GENX_(__NR_getuid32, sys_getuid), // 199
GENX_(__NR_getgid32, sys_getgid), // 200
GENX_(__NR_geteuid32, sys_geteuid), // 201
GENX_(__NR_getegid32, sys_getegid), // 202
GENX_(__NR_setreuid32, sys_setreuid), // 203
GENX_(__NR_setregid32, sys_setregid), // 204
GENXY(__NR_getgroups32, sys_getgroups), // 205
GENX_(__NR_setgroups32, sys_setgroups), // 206
GENX_(__NR_fchown32, sys_fchown), // 207
LINX_(__NR_setresuid32, sys_setresuid), // 208
LINXY(__NR_getresuid32, sys_getresuid), // 209
LINX_(__NR_setresgid32, sys_setresgid), // 210
LINXY(__NR_getresgid32, sys_getresgid), // 211
GENX_(__NR_chown32, sys_chown), // 212
GENX_(__NR_setuid32, sys_setuid), // 213
GENX_(__NR_setgid32, sys_setgid), // 214
LINX_(__NR_setfsuid32, sys_setfsuid), // 215
LINX_(__NR_setfsgid32, sys_setfsgid), // 216
//zz // (__NR_pivot_root, sys_pivot_root), // 217 */Linux
GENXY(__NR_mincore, sys_mincore), // 218
GENX_(__NR_madvise, sys_madvise), // 219
GENXY(__NR_getdents64, sys_getdents64), // 220
GENXY(__NR_fcntl64, sys_fcntl64), // 221
GENX_(222, sys_ni_syscall), // 222
GENX_(223, sys_ni_syscall), // 223
LINX_(__NR_gettid, sys_gettid), // 224
//zz // (__NR_readahead, sys_readahead), // 225 */(Linux?)
GENX_(__NR_setxattr, sys_setxattr), // 226
GENX_(__NR_lsetxattr, sys_lsetxattr), // 227
GENX_(__NR_fsetxattr, sys_fsetxattr), // 228
GENXY(__NR_getxattr, sys_getxattr), // 229
GENXY(__NR_lgetxattr, sys_lgetxattr), // 230
GENXY(__NR_fgetxattr, sys_fgetxattr), // 231
GENXY(__NR_listxattr, sys_listxattr), // 232
GENXY(__NR_llistxattr, sys_llistxattr), // 233
GENXY(__NR_flistxattr, sys_flistxattr), // 234
GENX_(__NR_removexattr, sys_removexattr), // 235
GENX_(__NR_lremovexattr, sys_lremovexattr), // 236
GENX_(__NR_fremovexattr, sys_fremovexattr), // 237
//zz LINX_(__NR_tkill, sys_tkill), // 238 */Linux
LINXY(__NR_sendfile64, sys_sendfile64), // 239
LINXY(__NR_futex, sys_futex), // 240
GENX_(__NR_sched_setaffinity, sys_sched_setaffinity), // 241
GENXY(__NR_sched_getaffinity, sys_sched_getaffinity), // 242
PLAX_(__NR_set_thread_area, sys_set_thread_area), // 243
PLAX_(__NR_get_thread_area, sys_get_thread_area), // 244
LINX_(__NR_io_setup, sys_io_setup), // 245
LINX_(__NR_io_destroy, sys_io_destroy), // 246
LINXY(__NR_io_getevents, sys_io_getevents), // 247
LINX_(__NR_io_submit, sys_io_submit), // 248
LINXY(__NR_io_cancel, sys_io_cancel), // 249
LINX_(__NR_fadvise64, sys_fadvise64), // 250 */(Linux?)
GENX_(251, sys_ni_syscall), // 251
LINX_(__NR_exit_group, sys_exit_group), // 252
GENXY(__NR_lookup_dcookie, sys_lookup_dcookie), // 253
LINXY(__NR_epoll_create, sys_epoll_create), // 254
LINX_(__NR_epoll_ctl, sys_epoll_ctl), // 255
LINXY(__NR_epoll_wait, sys_epoll_wait), // 256
//zz // (__NR_remap_file_pages, sys_remap_file_pages), // 257 */Linux
LINX_(__NR_set_tid_address, sys_set_tid_address), // 258
GENXY(__NR_timer_create, sys_timer_create), // 259
GENXY(__NR_timer_settime, sys_timer_settime), // (timer_create+1)
GENXY(__NR_timer_gettime, sys_timer_gettime), // (timer_create+2)
GENX_(__NR_timer_getoverrun, sys_timer_getoverrun),//(timer_create+3)
GENX_(__NR_timer_delete, sys_timer_delete), // (timer_create+4)
GENX_(__NR_clock_settime, sys_clock_settime), // (timer_create+5)
GENXY(__NR_clock_gettime, sys_clock_gettime), // (timer_create+6)
GENXY(__NR_clock_getres, sys_clock_getres), // (timer_create+7)
//zz // (__NR_clock_nanosleep, sys_clock_nanosleep),// (timer_create+8) */*
GENXY(__NR_statfs64, sys_statfs64), // 268
GENXY(__NR_fstatfs64, sys_fstatfs64), // 269
LINX_(__NR_tgkill, sys_tgkill), // 270 */Linux
GENX_(__NR_utimes, sys_utimes), // 271
LINX_(__NR_fadvise64_64, sys_fadvise64_64), // 272 */(Linux?)
GENX_(__NR_vserver, sys_ni_syscall), // 273
//zz // (__NR_mbind, sys_mbind), // 274 ?/?
//zz
//zz // (__NR_get_mempolicy, sys_get_mempolicy), // 275 ?/?
//zz // (__NR_set_mempolicy, sys_set_mempolicy), // 276 ?/?
GENXY(__NR_mq_open, sys_mq_open), // 277
GENX_(__NR_mq_unlink, sys_mq_unlink), // (mq_open+1)
GENX_(__NR_mq_timedsend, sys_mq_timedsend), // (mq_open+2)
GENXY(__NR_mq_timedreceive, sys_mq_timedreceive),// (mq_open+3)
GENX_(__NR_mq_notify, sys_mq_notify), // (mq_open+4)
GENXY(__NR_mq_getsetattr, sys_mq_getsetattr), // (mq_open+5)
GENX_(__NR_sys_kexec_load, sys_ni_syscall), // 283
};
const UInt ML_(syscall_table_size) =
sizeof(ML_(syscall_table)) / sizeof(ML_(syscall_table)[0]);
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/