void FZ_(syscall_read)(ThreadId tid, UWord *args, UInt nArgs, SysRes res) {
if(fengSysFlag){VG_(printf)("feng:entered syscall_read\n");}
printArgs(args,nArgs,"read");
UInt i, j, k;
Int fd = -1;
Char *data = NULL;
//populate_guest_args(tid);
fd = ((Int)args[0])/*guest_args[tid].args[3]*/;
data = (Char *)(args[1]/*guest_args[tid].args[1]*/);
//VG_(printf)("[?] tid %d read(%d) tainted %d\n", tid, fd, tainted_fds[tid][fd]);
if (fd < 0 || sr_isError(res) || !tainted_fds[tid][fd]) {
return;
}
k = position_fds[tid][fd];
for (i = 0; i < sr_Res(res); i++) {
#ifdef FENG_AMD64
if(fengSysFlag){VG_(printf)("feng:addr:%llu\n",((ULong)data + i));}
j = add_dependency_addr((Addr)((ULong)data + i), 8);
//VG_(printf)("[+] tid %d read(%d) tainting byte %d (0x%08x)\n",
// tid, fd, k + i, (ULong)(data + i));
pj=getDep(&depaddr8,j);
VG_(snprintf)(pj->cons, XXX_MAX_BUF, "input(%d)", k + i);
#else
if(fengSysFlag){VG_(printf)("feng:addr:%llu\n",((UInt)data + i));}
j = add_dependency_addr((Addr)(UInt)(data + i), 8);
//VG_(printf)("[+] tid %d read(%d) tainting byte %d (0x%08x)\n",
// tid, fd, k + i, (UInt)(data + i));
pj=getDep(&depaddr8,j);
VG_(snprintf)(pj->cons, XXX_MAX_BUF, "input(%d)", k + i);
#endif // FENG_AMD64
}
position_fds[tid][fd] += sr_Res(res);
}
static HChar* read_dot_valgrindrc ( const HChar* dir )
{
Int n;
SysRes fd;
struct vg_stat stat_buf;
HChar* f_clo = NULL;
const HChar dot_valgrindrc[] = ".valgrindrc";
vg_assert(dir != NULL);
HChar filename[VG_(strlen)(dir) + 1 + VG_(strlen)(dot_valgrindrc) + 1];
VG_(sprintf)(filename, "%s/%s", dir, dot_valgrindrc);
fd = VG_(open)(filename, 0, VKI_S_IRUSR);
if ( !sr_isError(fd) ) {
Int res = VG_(fstat)( sr_Res(fd), &stat_buf );
// Ignore if not owned by current user or world writeable (CVE-2008-4865)
if (!res && stat_buf.uid == VG_(geteuid)()
&& (!(stat_buf.mode & VKI_S_IWOTH))) {
if ( stat_buf.size > 0 ) {
f_clo = VG_(malloc)("commandline.rdv.1", stat_buf.size+1);
n = VG_(read)(sr_Res(fd), f_clo, stat_buf.size);
if (n == -1) n = 0;
vg_assert(n >= 0 && n <= stat_buf.size+1);
f_clo[n] = '\0';
}
}
else
VG_(message)(Vg_UserMsg,
"%s was not read as it is either world writeable or not "
"owned by the current user\n", filename);
VG_(close)(sr_Res(fd));
}
return f_clo;
}
Int ML_(am_readlink)(const HChar* path, HChar* buf, UInt bufsiz)
{
SysRes res;
# if defined(VGP_arm64_linux)
res = VG_(do_syscall4)(__NR_readlinkat, VKI_AT_FDCWD,
(UWord)path, (UWord)buf, bufsiz);
# elif defined(VGP_tilegx_linux)
res = VG_(do_syscall4)(__NR_readlinkat, VKI_AT_FDCWD, (UWord)path,
(UWord)buf, bufsiz);
# elif defined(VGO_linux) || defined(VGO_darwin)
res = VG_(do_syscall3)(__NR_readlink, (UWord)path, (UWord)buf, bufsiz);
# elif defined(VGO_solaris)
res = VG_(do_syscall4)(__NR_readlinkat, VKI_AT_FDCWD, (UWord)path,
(UWord)buf, bufsiz);
# else
# error Unknown OS
# endif
return sr_isError(res) ? -1 : sr_Res(res);
}
/* Open and map a dylinker file.
Returns 0 on success, -1 on any failure.
filename must be an absolute path.
The dylinker's entry point is returned in *out_linker_entry.
*/
static int
open_dylinker(const char *filename, vki_uint8_t **out_linker_entry)
{
struct vg_stat sb;
vki_size_t filesize;
SysRes res;
int fd;
int err;
if (filename[0] != '/') {
print("bad executable (dylinker name is not an absolute path)\n");
return -1;
}
res = VG_(open)(filename, VKI_O_RDONLY, 0);
fd = sr_Res(res);
if (sr_isError(res)) {
print("couldn't open dylinker: ");
print(filename);
print("\n");
return -1;
}
err = VG_(fstat)(fd, &sb);
if (err) {
print("couldn't stat dylinker: ");
print(filename);
print("\n");
VG_(close)(fd);
return -1;
}
filesize = sb.size;
err = load_mach_file(fd, 0, filesize, MH_DYLINKER, filename,
NULL, NULL, NULL, out_linker_entry, NULL);
if (err) {
print("...while loading dylinker: ");
print(filename);
print("\n");
}
VG_(close)(fd);
return err;
}
static void lk_write_global(const char* path)
{
int fd;
SysRes res;
res = VG_(open) (path, VKI_O_CREAT|VKI_O_WRONLY|VKI_O_TRUNC, 0);
if (sr_isError(res))
{
VG_(printf)("Error opening file!\n");
return;
}
fd = (int) sr_Res(res);
char buffer [1000];
int cx = VG_(snprintf)(buffer, 1000, "%lu\n",global_counter);
VG_(write) (fd, buffer,cx);
//Close file
VG_(close)(fd);
}
// Look at the first 80 chars, and if any are greater than 127, it's binary.
// This is crude, but should be good enough. Note that it fails on a
// zero-length file, as we want.
static Bool is_binary_file(Char* f)
{
SysRes res = VG_(open)(f, VKI_O_RDONLY, 0);
if (!sr_isError(res)) {
UChar buf[80];
Int fd = sr_Res(res);
Int n = VG_(read)(fd, buf, 80);
Int i;
for (i = 0; i < n; i++) {
if (buf[i] > 127)
return True; // binary char found
}
return False;
} else {
// Something went wrong. This will only happen if we earlier
// succeeded in opening the file but fail here (eg. the file was
// deleted between then and now).
VG_(printf)("valgrind: %s: unknown error\n", f);
VG_(exit)(126); // 126 == NOEXEC
}
}
Bool storeUsedOffsets(Char* fileName)
{
SysRes openRes =
VG_(open)(fileName, VKI_O_WRONLY | VKI_O_TRUNC | VKI_O_CREAT,
VKI_S_IRUSR | VKI_S_IROTH | VKI_S_IRGRP |
VKI_S_IWUSR | VKI_S_IWOTH | VKI_S_IWGRP);
if (sr_isError(openRes))
{
return False;
}
Int fd = sr_Res(openRes);
Int previousOffset = -1, i, j;
Word value;
for (j = 0; j < VG_(sizeXA) (usedOffsets); j ++)
{
OSet *offsetSet = *((OSet **) VG_(indexXA) (usedOffsets, j));
Char *fileName = * ((Char **) VG_(indexXA) (inputFiles, j));
VG_(OSetWord_ResetIter) (offsetSet);
VG_(write) (fd, fileName, VG_(strlen) (fileName));
while(VG_(OSetWord_Next) (offsetSet, &value))
{
for (i = previousOffset; i < value - 1; i ++)
{
VG_(write) (fd, "\0", 1);
}
VG_(write) (fd, "\1", 1);
previousOffset = value;
}
VG_(OSetWord_Destroy) (offsetSet);
VG_(free) (fileName);
VG_(write) (fd, "\n", 1);
}
VG_(close) (fd);
VG_(deleteXA) (inputFiles);
VG_(deleteXA) (usedOffsets);
return True;
}
/* returns: 0 = success, non-0 is failure */
Int VG_(load_script)(Int fd, const HChar* name, ExeInfo* info)
{
HChar hdr[4096];
Int len = sizeof hdr;
Int eol;
HChar* interp;
HChar* end;
HChar* cp;
HChar* arg = NULL;
SysRes res;
// Read the first part of the file.
res = VG_(pread)(fd, hdr, len, 0);
if (sr_isError(res)) {
VG_(close)(fd);
return VKI_EACCES;
} else {
len = sr_Res(res);
}
vg_assert('#' == hdr[0] && '!' == hdr[1]);
end = hdr + len;
interp = hdr + 2;
while (interp < end && (*interp == ' ' || *interp == '\t'))
interp++;
/* skip over interpreter name */
for (cp = interp; cp < end && !VG_(isspace)(*cp); cp++)
;
eol = (*cp == '\n');
*cp++ = '\0';
if (!eol && cp < end) {
/* skip space before arg */
while (cp < end && VG_(isspace)(*cp) && *cp != '\n')
cp++;
/* arg is from here to eol */
arg = cp;
while (cp < end && *cp != '\n')
cp++;
*cp = '\0';
}
VG_(free)(info->interp_name);
info->interp_name = VG_(strdup)("ume.ls.1", interp);
vg_assert(NULL != info->interp_name);
if (arg != NULL && *arg != '\0') {
info->interp_args = VG_(strdup)("ume.ls.2", arg);
vg_assert(NULL != info->interp_args);
}
if (info->argv && info->argv[0] != NULL)
info->argv[0] = name;
VG_(args_the_exename) = name;
if (0)
VG_(printf)("#! script: interp_name=\"%s\" interp_args=\"%s\"\n",
info->interp_name, info->interp_args);
return VG_(do_exec_inner)(interp, info);
}
// Check the file looks executable.
SysRes
VG_(pre_exec_check)(const HChar* exe_name, Int* out_fd, Bool allow_setuid)
{
Int fd, ret, i;
SysRes res;
Char buf[4096];
SizeT bufsz = 4096, fsz;
Bool is_setuid = False;
// Check it's readable
res = VG_(open)(exe_name, VKI_O_RDONLY, 0);
if (sr_isError(res)) {
return res;
}
fd = sr_Res(res);
// Check we have execute permissions
ret = VG_(check_executable)(&is_setuid, (HChar*)exe_name, allow_setuid);
if (0 != ret) {
VG_(close)(fd);
if (is_setuid && !VG_(clo_xml)) {
VG_(message)(Vg_UserMsg, "");
VG_(message)(Vg_UserMsg,
"Warning: Can't execute setuid/setgid executable: %s",
exe_name);
VG_(message)(Vg_UserMsg, "Possible workaround: remove "
"--trace-children=yes, if in effect");
VG_(message)(Vg_UserMsg, "");
}
return VG_(mk_SysRes_Error)(ret);
}
fsz = (SizeT)VG_(fsize)(fd);
if (fsz < bufsz)
bufsz = fsz;
res = VG_(pread)(fd, buf, bufsz, 0);
if (sr_isError(res) || sr_Res(res) != bufsz) {
VG_(close)(fd);
return VG_(mk_SysRes_Error)(VKI_EACCES);
}
bufsz = sr_Res(res);
// Look for a matching executable format
for (i = 0; i < EXE_HANDLER_COUNT; i++) {
if ((*exe_handlers[i].match_fn)(buf, bufsz)) {
res = VG_(mk_SysRes_Success)(i);
break;
}
}
if (i == EXE_HANDLER_COUNT) {
// Rejected by all executable format handlers.
res = VG_(mk_SysRes_Error)(VKI_ENOEXEC);
}
// Write the 'out_fd' param if necessary, or close the file.
if (!sr_isError(res) && out_fd) {
*out_fd = fd;
} else {
VG_(close)(fd);
}
return res;
}
static void fr_post_clo_init(void)
{
Rule_List* last_rule_ptr = NULL;
Char* read_ptr;
Trace_Block* block = NULL;
Trace_Block* parent = NULL;
Int* indents = (int*)dir_buffer;
Int indent;
Int depth = -1;
Bool is_group;
SysRes sres;
Int fd;
OffT file_size;
if (clo_mmap) {
#if VG_WORDSIZE == 4
mmap_section.next = NULL;
mmap_section.page_addr = 0;
mmap_section.trace_blocks = VG_(calloc)("freya.fr_post_clo_init.2", PAGE_NUMBER, sizeof(Trace_Block*));
mmap_section.used_blocks = VG_(calloc)("freya.fr_post_clo_init.3", PAGE_NUMBER, sizeof(Char));
#else
mmap_sections = VG_(calloc)("freya.fr_post_clo_init.1", 1, sizeof(Mmap_Section));
mmap_sections->next = NULL;
mmap_sections->page_addr = 0;
mmap_sections->trace_blocks = VG_(calloc)("freya.fr_post_clo_init.2", PAGE_NUMBER, sizeof(Trace_Block*));
mmap_sections->used_blocks = VG_(calloc)("freya.fr_post_clo_init.3", PAGE_NUMBER, sizeof(Char));
mmap_section_cache = mmap_sections;
#endif
}
read_ptr = NULL;
if (clo_config) {
sres = VG_(open)(clo_config, VKI_O_RDONLY, 0);
if (!sr_isError(sres)) {
fd = (Int) sr_Res(sres);
file_size = VG_(lseek)(fd, 0, VKI_SEEK_END);
VG_(lseek)(fd, 0, VKI_SEEK_SET);
if (clo_fr_verb)
VG_(printf)("File '%s' (size: %ld bytes) is successfully opened.\n", clo_config, file_size);
read_ptr = VG_(malloc)("freya.fr_post_clo_init.3", (file_size + 1) * sizeof(Char));
VG_(read)(fd, read_ptr, file_size);
read_ptr[file_size] = '\0';
VG_(close) (fd);
}
else if (clo_fr_verb)
VG_(printf)("Cannot open '%s'. (Fallback to default config)\n", clo_config);
}
else if (clo_fr_verb)
VG_(printf)("No config file provided. (Fallback to default config)\n");
if (!read_ptr) {
// Duplicate
read_ptr = VG_(malloc)("freya.fr_post_clo_init.4", (VG_(strlen)(default_rule) + 1) * sizeof(Char));
VG_(strcpy)(read_ptr, default_rule);
}
while (*read_ptr) {
// Parsing the next line, first skip spaces
indent = 0;
while (*read_ptr == ' ') {
indent++;
read_ptr++;
}
// Skip comments and empty lines
if (*read_ptr == '#' || *read_ptr == '\r' || *read_ptr == '\n') {
while (*read_ptr != '\0' && *read_ptr != '\r' && *read_ptr != '\n')
read_ptr++;
if (*read_ptr) {
read_ptr++;
continue;
}
}
if (*read_ptr == '{') {
read_ptr = parse_extra_rule(read_ptr, block);
continue;
} else if (*read_ptr != '[' && *read_ptr != '(') {
read_ptr = parse_rule(read_ptr, &last_rule_ptr);
continue;
}
is_group = *read_ptr == '[';
block = VG_(malloc)("freya.fr_post_clo_init.4", sizeof(Trace_Block));
read_ptr++;
block->name = read_ptr;
while (!(!is_group && *read_ptr == ')') && !(is_group && *read_ptr == ']')) {
tl_assert2(*read_ptr && *read_ptr != '\n' && *read_ptr != '\r', "unterminated ( or [");
read_ptr++;
}
tl_assert2(block->name != read_ptr, "node has no name");
*read_ptr = '\0';
if (!is_group)
search_rule(block, block->name, read_ptr - block->name);
read_ptr++;
if (*read_ptr == '+') {
tl_assert2(default_parent == NULL, "Only one default node is allowed");
default_parent = block;
read_ptr++;
}
while (*read_ptr == ' ')
read_ptr++;
tl_assert2(*read_ptr == '\n' || *read_ptr == '\r' || !*read_ptr, "Garbage at the end of the line");
if (clo_fr_verb)
VG_(printf)("%s '%s' %s\n", is_group ? "Group:" : "Group & Attach:", block->name, default_parent == block ? "(Default)" : "");
if (depth >= 0) {
if (indents[depth] != indent) {
if (indent > indents[depth]) {
tl_assert2(depth < 63, "Maximum allowed depth is 63 for the tree");
depth++;
indents[depth] = indent;
if (parent)
parent = parent->first;
else
parent = trace_head;
} else {
do {
tl_assert2(depth != 0, "Wrong tree indentation");
depth--;
tl_assert(parent);
parent = parent->parent;
} while (indent != indents[depth]);
tl_assert((depth == 0 && !parent) || (depth > 0 && parent));
}
}
} else {
// The indentation of the top element
tl_assert(!parent);
indents[0] = indent;
depth = 0;
}
block->parent = parent;
if (parent) {
block->next = parent->first;
parent->first = block;
} else {
block->next = trace_head;
trace_head = block;
}
block->first = NULL;
block->hash_next = NULL;
block->allocs = 0;
block->total = 0;
block->current = 0;
block->peak = 0;
block->ips = 0;
}
remove_unused_rules();
}
Int ML_(am_read) ( Int fd, void* buf, Int count)
{
SysRes res = VG_(do_syscall3)(__NR_read, fd, (UWord)buf, count);
return sr_isError(res) ? -1 : sr_Res(res);
}
VgStack* VG_(am_alloc_VgStack)( /*OUT*/Addr* initial_sp )
{
Int szB;
SysRes sres;
VgStack* stack;
UInt* p;
Int i;
/* Allocate the stack. */
szB = VG_STACK_GUARD_SZB
+ VG_STACK_ACTIVE_SZB + VG_STACK_GUARD_SZB;
#if !defined(VGPV_ppc64_linux_bgq)
sres = VG_(am_mmap_anon_float_valgrind)( szB );
if (sr_isError(sres))
return NULL;
stack = (VgStack*)(AddrH)sr_Res(sres);
aspacem_assert(VG_IS_PAGE_ALIGNED(szB));
aspacem_assert(VG_IS_PAGE_ALIGNED(stack));
/* Protect the guard areas. */
sres = local_do_mprotect_NO_NOTIFY(
(Addr) &stack[0],
VG_STACK_GUARD_SZB, VKI_PROT_NONE
);
if (sr_isError(sres)) goto protect_failed;
VG_(am_notify_mprotect)(
(Addr) &stack->bytes[0],
VG_STACK_GUARD_SZB, VKI_PROT_NONE
);
sres = local_do_mprotect_NO_NOTIFY(
(Addr) &stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB],
VG_STACK_GUARD_SZB, VKI_PROT_NONE
);
if (sr_isError(sres)) goto protect_failed;
VG_(am_notify_mprotect)(
(Addr) &stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB],
VG_STACK_GUARD_SZB, VKI_PROT_NONE
);
#else
{ sres = VG_(am_mmap_anon_float_valgrind)( szB );
if (sr_isError(sres))
return NULL;
stack = (VgStack*)sr_Res(sres);
}
#endif
/* Looks good. Fill the active area with junk so we can later
tell how much got used. */
p = (UInt*)&stack->bytes[VG_STACK_GUARD_SZB];
for (i = 0; i < VG_STACK_ACTIVE_SZB/sizeof(UInt); i++)
p[i] = 0xDEADBEEF;
*initial_sp = (Addr)&stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB];
*initial_sp -= 8;
*initial_sp &= ~((Addr)0x1F); /* 32-align it */
VG_(debugLog)( 1,"aspacem","allocated thread stack at 0x%llx size %d\n",
(ULong)(Addr)stack, szB);
ML_(am_do_sanity_check)();
return stack;
protect_failed:
/* The stack was allocated, but we can't protect it. Unmap it and
return NULL (failure). */
(void)ML_(am_do_munmap_NO_NOTIFY)( (Addr)stack, szB );
ML_(am_do_sanity_check)();
return NULL;
}
/* 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;
}
/*
Load a fat Mach-O executable.
*/
static int
load_fat_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype,
const HChar *filename,
vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end,
vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry)
{
struct fat_header fh;
vki_off_t arch_offset;
int i;
cpu_type_t good_arch;
#if defined(VGA_arm)
cpu_subtype_t highest_subtype;
#endif
SysRes res;
#if defined(VGA_ppc32)
good_arch = CPU_TYPE_POWERPC;
#elif defined(VGA_ppc64be)
good_arch = CPU_TYPE_POWERPC64BE;
#elif defined(VGA_ppc64le)
good_arch = CPU_TYPE_POWERPC64LE;
#elif defined(VGA_x86)
good_arch = CPU_TYPE_I386;
#elif defined(VGA_amd64)
good_arch = CPU_TYPE_X86_64;
#elif defined(VGA_arm)
good_arch = CPU_TYPE_ARM;
highest_subtype = CPU_SUBTYPE_ARM_V7;
#else
# error unknown architecture
#endif
// Read fat header
// All fat contents are BIG-ENDIAN
if (size < sizeof(fh)) {
print("bad executable (bad fat header)\n");
return -1;
}
res = VG_(pread)(fd, &fh, sizeof(fh), offset);
if (sr_isError(res) || sr_Res(res) != sizeof(fh)) {
print("bad executable (bad fat header)\n");
return -1;
}
// Scan arch headers looking for a good one
arch_offset = offset + sizeof(fh);
fh.nfat_arch = VG_(ntohl)(fh.nfat_arch);
for (i = 0; i < fh.nfat_arch; i++) {
struct fat_arch arch;
if (arch_offset + sizeof(arch) > size) {
print("bad executable (corrupt fat archs)\n");
return -1;
}
res = VG_(pread)(fd, &arch, sizeof(arch), arch_offset);
arch_offset += sizeof(arch);
if (sr_isError(res) || sr_Res(res) != sizeof(arch)) {
VG_(printf)("bad executable (corrupt fat arch) %x %llu\n",
arch.cputype, (ULong)arch_offset);
return -1;
}
arch.cputype = VG_(ntohl)(arch.cputype);
arch.cpusubtype = VG_(ntohl)(arch.cpusubtype);
arch.offset = VG_(ntohl)(arch.offset);
arch.size = VG_(ntohl)(arch.size);
arch.align = VG_(ntohl)(arch.align);
#if defined(VGA_arm)
if ((arch.cputype == good_arch) && (arch.cpusubtype <= highest_subtype)) {
#else
if (arch.cputype == good_arch) {
#endif
// use this arch
if (arch.offset > size || arch.offset + arch.size > size) {
print("bad executable (corrupt fat arch 2)\n");
return -1;
}
return load_mach_file(fd, offset+arch.offset, arch.size, filetype,
filename, out_stack_start, out_stack_end,
out_text, out_entry, out_linker_entry);
}
}
print("bad executable (can't run on this machine)\n");
return -1;
}
/*
Load a Mach-O executable or dylinker.
The file may be fat or thin.
*/
static int
load_mach_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype,
const HChar *filename,
vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end,
vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry)
{
vki_uint32_t magic;
SysRes res;
if (size < sizeof(magic)) {
print("bad executable (no Mach-O magic)\n");
return -1;
}
res = VG_(pread)(fd, &magic, sizeof(magic), offset);
if (sr_isError(res) || sr_Res(res) != sizeof(magic)) {
print("bad executable (no Mach-O magic)\n");
return -1;
}
if (magic == MAGIC) {
// thin
return load_thin_file(fd, offset, size, filetype, filename,
out_stack_start, out_stack_end,
out_text, out_entry, out_linker_entry);
} else if (magic == VG_(htonl)(FAT_MAGIC)) {
// fat
return load_fat_file(fd, offset, size, filetype, filename,
out_stack_start, out_stack_end,
out_text, out_entry, out_linker_entry);
} else {
// huh?
print("bad executable (bad Mach-O magic)\n");
return -1;
}
}
void APROF_(post_syscall)(ThreadId tid, UInt syscallno,
UWord * args, UInt nArgs, SysRes res) {
APROF_(debug_assert)(tid == VG_(get_running_tid)(), "TID mismatch");
#if defined(VGO_linux)
if(res._isError) {
#elif defined(VGO_darwin)
if(res._mode == SysRes_UNIX_ERR) {
#endif
return;
}
/*
* This is an undocumented behavior of Valgrind
*/
Bool forced_switch = False;
if (tid != APROF_(runtime).current_TID) {
APROF_(thread_switch)(tid, 0);
forced_switch = True; // a thread switch increased the global counter
}
if(
syscallno == __NR_read
#if defined(VGP_ppc32_linux) || defined(VGP_ppc64_linux)
|| syscallno == __NR_recv
#endif
#if !defined(VGP_x86_linux) && !defined(VGP_s390x_linux)
|| syscallno == __NR_recvfrom
#endif
#if defined(VGP_x86_darwin) || defined(VGP_amd64_darwin)
|| syscallno == __NR_pread
#else
|| syscallno == __NR_pread64
#endif
){
Addr addr = args[1];
Int size = (Int) sr_Res(res);
APROF_(fix_access_size)(addr, size);
if (!forced_switch) APROF_(increase_global_counter)();
while(size > 0) {
APROF_(trace_access_drms)( STORE,
addr,
APROF_(runtime).memory_resolution, True);
size -= APROF_(runtime).memory_resolution;
addr += APROF_(runtime).memory_resolution;
}
} else if (
syscallno == __NR_readv
#if !defined(VGP_x86_darwin) && !defined(VGP_amd64_darwin)
|| syscallno == __NR_preadv
#endif
){
struct vki_iovec * base = (struct vki_iovec *) args[1];
UWord iovcnt = args[2];
Int size = (Int) sr_Res(res);
UWord i;
Int iov_len;
if (!forced_switch) APROF_(increase_global_counter)();
for(i = 0; i < iovcnt; i++){
if(size == 0) break;
Addr addr = (Addr) base[i].iov_base;
if(base[i].iov_len <= size)
iov_len = base[i].iov_len;
else
iov_len = size;
size -= iov_len;
APROF_(fix_access_size)(addr, iov_len);
while(iov_len > 0) {
APROF_(trace_access_drms)( STORE,
addr,
APROF_(runtime).memory_resolution, True);
iov_len -= APROF_(runtime).memory_resolution;
addr += APROF_(runtime).memory_resolution;
}
}
} else if (
syscallno == __NR_write
#if defined(VGP_ppc32_linux) || defined(VGP_ppc64_linux)
|| syscallno== __NR_send
#endif
#if !defined(VGP_x86_linux) && !defined(VGP_s390x_linux)
|| syscallno== __NR_sendto
#endif
#if defined(VGP_x86_darwin) || defined(VGP_amd64_darwin)
|| syscallno== __NR_pwrite
#else
|| syscallno== __NR_pwrite64
#endif
){
Addr addr = args[1];
Int size = (Int) sr_Res(res);
APROF_(fix_access_size)(addr, size);
while (size > 0) {
APROF_(trace_access_drms)( LOAD,
addr,
APROF_(runtime).memory_resolution, True);
size -= APROF_(runtime).memory_resolution;
addr += APROF_(runtime).memory_resolution;
}
} else if (
syscallno == __NR_writev
#if !defined(VGP_x86_darwin) && !defined(VGP_amd64_darwin)
|| syscallno == __NR_pwritev
#endif
){
Int size = (Int) sr_Res(res);
struct vki_iovec * base = (struct vki_iovec *) args[1];
UWord iovcnt = args[2];
UWord i;
Int iov_len;
for(i = 0; i < iovcnt; i++){
if(size == 0) break;
Addr addr = (Addr) base[i].iov_base;
if(base[i].iov_len <= size)
iov_len = base[i].iov_len;
else
iov_len = size;
size -= iov_len;
APROF_(fix_access_size)(addr, iov_len);
while (iov_len > 0) {
APROF_(trace_access_drms)( LOAD,
addr,
APROF_(runtime).memory_resolution, True);
iov_len -= APROF_(runtime).memory_resolution;
addr += APROF_(runtime).memory_resolution;
}
}
} else if (
#if !defined(VGP_x86_linux)
syscallno == __NR_msgrcv
#else
False
#endif
){
Int size = (Int) sr_Res(res);
Addr addr = args[1];
size = size + sizeof(long int);
APROF_(fix_access_size)(addr, size);
if (!forced_switch) APROF_(increase_global_counter)();
while(size > 0) {
APROF_(trace_access_drms)( STORE,
addr,
APROF_(runtime).memory_resolution, True);
size -= APROF_(runtime).memory_resolution;
addr += APROF_(runtime).memory_resolution;
}
} else if (
#if !defined(VGP_x86_linux)
syscallno == __NR_msgsnd
#else
False
#endif
){
Addr addr = args[1];
SizeT s = args[2];
Int size = s + sizeof(long int);
APROF_(fix_access_size)(addr, size);
while(size > 0) {
APROF_(trace_access_drms)( LOAD,
addr,
APROF_(runtime).memory_resolution, True);
size -= APROF_(runtime).memory_resolution;
addr += APROF_(runtime).memory_resolution;
}
} else if (
syscallno == __NR_mmap
#if defined(VGP_x86_linux)
|| syscallno == __NR_mmap2
#endif
) {
Addr addr = (Addr) sr_Res(res);
Int size= args[1];
APROF_(fix_access_size)(addr, size);
if (!forced_switch) APROF_(increase_global_counter)();
while(size > 0) {
APROF_(trace_access_drms)( STORE,
addr,
APROF_(runtime).memory_resolution, True);
size -= APROF_(runtime).memory_resolution;
addr += APROF_(runtime).memory_resolution;
}
}
}
VgStack* VG_(am_alloc_VgStack)( Addr* initial_sp )
{
Int szB;
SysRes sres;
VgStack* stack;
UInt* p;
Int i;
szB = VG_STACK_GUARD_SZB
+ VG_STACK_ACTIVE_SZB + VG_STACK_GUARD_SZB;
sres = VG_(am_mmap_anon_float_valgrind)( szB );
if (sr_isError(sres))
return NULL;
stack = (VgStack*)(AddrH)sr_Res(sres);
aspacem_assert(VG_IS_PAGE_ALIGNED(szB));
aspacem_assert(VG_IS_PAGE_ALIGNED(stack));
sres = local_do_mprotect_NO_NOTIFY(
(Addr) &stack[0],
VG_STACK_GUARD_SZB, VKI_PROT_NONE
);
if (sr_isError(sres)) goto protect_failed;
VG_(am_notify_mprotect)(
(Addr) &stack->bytes[0],
VG_STACK_GUARD_SZB, VKI_PROT_NONE
);
sres = local_do_mprotect_NO_NOTIFY(
(Addr) &stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB],
VG_STACK_GUARD_SZB, VKI_PROT_NONE
);
if (sr_isError(sres)) goto protect_failed;
VG_(am_notify_mprotect)(
(Addr) &stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB],
VG_STACK_GUARD_SZB, VKI_PROT_NONE
);
p = (UInt*)&stack->bytes[VG_STACK_GUARD_SZB];
for (i = 0; i < VG_STACK_ACTIVE_SZB/sizeof(UInt); i++)
p[i] = 0xDEADBEEF;
*initial_sp = (Addr)&stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB];
*initial_sp -= 8;
*initial_sp &= ~((Addr)0x1F);
VG_(debugLog)( 1,"aspacem","allocated thread stack at 0x%llx size %d\n",
(ULong)(Addr)stack, szB);
ML_(am_do_sanity_check)();
return stack;
protect_failed:
(void)ML_(am_do_munmap_NO_NOTIFY)( (Addr)stack, szB );
ML_(am_do_sanity_check)();
return NULL;
}
Bool parseMask(Char* filename)
{
inputFilter = VG_(newXA)(VG_(malloc), "inputFilter", VG_(free), sizeof(XArray*));
Int fd = sr_Res(VG_(open)(filename, VKI_O_RDWR | VKI_O_CREAT, VKI_S_IRWXU | VKI_S_IRWXG | VKI_S_IRWXO));
struct vg_stat fileInfo;
VG_(fstat)(fd, &fileInfo);
Long size = fileInfo.size;
Char* buf = (Char*) VG_(malloc)("buf", size + 1);
VG_(read)(fd, buf, size);
buf[size] = '\0';
VG_(close)(fd);
Char* str = buf;
Char** endptr = &str;
XArray* curfilter = VG_(newXA)(VG_(malloc), "chunk", VG_(free), sizeof(offsetPair));
for (;;)
{
while (VG_(isspace)(*str))
{
while (VG_(isspace)(*str) && (*str != '\n'))
{
str++;
}
if (*str == '\n')
{
VG_(addToXA)(inputFilter, &curfilter);
curfilter = VG_(newXA)(VG_(malloc), "chunk", VG_(free), sizeof(offsetPair));
str++;
}
}
Char* str0 = str;
Long p1 = VG_(strtoll16)(str, endptr);
if ((*endptr == str0) && (p1 == 0))
{
str = *endptr;
if (*str == '\0')
{
break;
}
while (VG_(isspace)(*str) && (*str != '\n'))
{
str++;
}
if (*str != '\n')
{
return False;
}
else
{
VG_(addToXA)(inputFilter, &curfilter);
curfilter = VG_(newXA)(VG_(malloc), "chunk", VG_(free), sizeof(offsetPair));
str++;
continue;
}
}
Long p2 = p1;
str = *endptr;
while (VG_(isspace)(*str) && (*str != '\n'))
{
str++;
}
if (*str == '-')
{
str++;
str0 = str;
p2 = VG_(strtoll16)(str, endptr);
if ((*endptr == str0) && (p2 == 0))
{
return False;
}
}
offsetPair* newPair = VG_(malloc) ("newPair", sizeof(offsetPair));
newPair->first = p1;
newPair->last = p2;
//VG_(printf)("p1=%x\n", p1);
//VG_(printf)("p2=%x\n", p2);
VG_(addToXA)(curfilter, newPair);
str = *endptr;
while (VG_(isspace)(*str) && (*str != '\n'))
{
str++;
}
if (*str == '\n')
{
VG_(addToXA)(inputFilter, &curfilter);
curfilter = VG_(newXA)(VG_(malloc), "chunk", VG_(free), sizeof(offsetPair));
str++;
}
if (*str == '\0')
{
break;
}
}
VG_(free)(buf);
return True;
}
static
struct elfinfo *readelf(Int fd, const char *filename)
{
SysRes sres;
struct elfinfo *e = VG_(malloc)("ume.re.1", sizeof(*e));
Int phsz;
vg_assert(e);
e->fd = fd;
sres = VG_(pread)(fd, &e->e, sizeof(e->e), 0);
if (sr_isError(sres) || sr_Res(sres) != sizeof(e->e)) {
VG_(printf)("valgrind: %s: can't read ELF header: %s\n",
filename, VG_(strerror)(sr_Err(sres)));
goto bad;
}
if (VG_(memcmp)(&e->e.e_ident[0], ELFMAG, SELFMAG) != 0) {
VG_(printf)("valgrind: %s: bad ELF magic number\n", filename);
goto bad;
}
if (e->e.e_ident[EI_CLASS] != VG_ELF_CLASS) {
VG_(printf)("valgrind: wrong ELF executable class "
"(eg. 32-bit instead of 64-bit)\n");
goto bad;
}
if (e->e.e_ident[EI_DATA] != VG_ELF_DATA2XXX) {
VG_(printf)("valgrind: executable has wrong endian-ness\n");
goto bad;
}
if (!(e->e.e_type == ET_EXEC || e->e.e_type == ET_DYN)) {
VG_(printf)("valgrind: this is not an executable\n");
goto bad;
}
if (e->e.e_machine != VG_ELF_MACHINE) {
VG_(printf)("valgrind: executable is not for "
"this architecture\n");
goto bad;
}
if (e->e.e_phentsize != sizeof(ESZ(Phdr))) {
VG_(printf)("valgrind: sizeof ELF Phdr wrong\n");
goto bad;
}
phsz = sizeof(ESZ(Phdr)) * e->e.e_phnum;
e->p = VG_(malloc)("ume.re.2", phsz);
vg_assert(e->p);
sres = VG_(pread)(fd, e->p, phsz, e->e.e_phoff);
if (sr_isError(sres) || sr_Res(sres) != phsz) {
VG_(printf)("valgrind: can't read phdr: %s\n",
VG_(strerror)(sr_Err(sres)));
VG_(free)(e->p);
goto bad;
}
return e;
bad:
VG_(free)(e);
return NULL;
}
/*
Loads a Mach-O executable into memory, along with any threads,
stacks, and dylinker.
Returns 0 on success, -1 on any failure.
fd[offset..offset+size) is a Mach-O thin file.
filetype is MH_EXECUTE or MH_DYLINKER.
The mapped but empty stack is returned in *out_stack.
The executable's Mach headers are returned in *out_text.
The executable's entry point is returned in *out_entry.
The dylinker's entry point (if any) is returned in *out_linker_entry.
GrP fixme need to return whether dylinker was found - stack layout is different
*/
static int
load_thin_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype,
const char *filename,
vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end,
vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry)
{
struct MACH_HEADER mh;
vki_uint8_t *headers;
vki_uint8_t *headers_end;
struct load_command *lc;
struct load_command *lcend;
struct SEGMENT_COMMAND *segcmd;
struct thread_command *threadcmd;
struct dylinker_command *dycmd;
int err;
SysRes res;
vki_size_t len;
vki_uint8_t *stack_start = NULL; // allocated thread stack (hot end)
vki_uint8_t *stack_end = NULL; // allocated thread stack (cold end)
vki_uint8_t *entry = NULL; // static entry point
vki_uint8_t *text = NULL; // start of text segment (i.e. the mach headers)
vki_uint8_t *linker_entry = NULL; // dylinker entry point
// Read Mach-O header
if (sizeof(mh) > size) {
print("bad executable (no Mach-O header)\n");
}
res = VG_(pread)(fd, &mh, sizeof(mh), offset);
if (sr_isError(res) || sr_Res(res) != sizeof(mh)) {
print("bad executable (no Mach-O header)\n");
return -1;
}
// Sanity-check the header itself
if (mh.magic != MAGIC) {
print("bad executable (no Mach-O magic)\n");
return -1;
}
if (mh.filetype != filetype) {
// expecting MH_EXECUTE or MH_DYLINKER
print("bad executable (wrong file type)\n");
return -1;
}
// Map all headers into memory
len = sizeof(mh) + mh.sizeofcmds;
if (len > size) {
print("bad executable (missing load commands)\n");
return -1;
}
headers = VG_(malloc)("ume.macho.headers", len);
res = VG_(pread)(fd, headers, len, offset);
if (sr_isError(res)) {
print("couldn't read load commands from executable\n");
return -1;
}
headers_end = headers + len;
// Map some segments into client memory:
// LC_SEGMENT (text, data, etc)
// UNIXSTACK (stack)
// LOAD_DYLINKER (dyld)
lcend = (struct load_command *)(headers + mh.sizeofcmds + sizeof(mh));
for (lc = (struct load_command *)(headers + sizeof(mh));
lc < lcend;
lc = (struct load_command *)(lc->cmdsize + (vki_uint8_t *)lc))
{
if ((vki_uint8_t *)lc < headers ||
lc->cmdsize+(vki_uint8_t *)lc > headers_end) {
print("bad executable (invalid load commands)\n");
return -1;
}
switch (lc->cmd) {
case LC_SEGMENT_CMD:
if (lc->cmdsize < sizeof(struct SEGMENT_COMMAND)) {
print("bad executable (invalid load commands)\n");
return -1;
}
segcmd = (struct SEGMENT_COMMAND *)lc;
err = load_segment(fd, offset, size, &text, &stack_start,
segcmd, filename);
if (err) return -1;
break;
case LC_UNIXTHREAD:
if (stack_end || entry) {
print("bad executable (multiple thread commands)\n");
return -1;
}
if (lc->cmdsize < sizeof(struct thread_command)) {
print("bad executable (invalid load commands)\n");
return -1;
}
threadcmd = (struct thread_command *)lc;
err = load_unixthread(&stack_start, &stack_end, &entry, threadcmd);
if (err) return -1;
break;
case LC_LOAD_DYLINKER:
if (filetype == MH_DYLINKER) {
print("bad executable (dylinker needs a dylinker)\n");
return -1;
}
if (linker_entry) {
print("bad executable (multiple dylinker commands)\n");
}
if (lc->cmdsize < sizeof(struct dylinker_command)) {
print("bad executable (invalid load commands)\n");
return -1;
}
dycmd = (struct dylinker_command *)lc;
err = load_dylinker(&linker_entry, dycmd);
if (err) return -1;
break;
case LC_THREAD:
if (filetype == MH_EXECUTE) {
print("bad executable (stackless thread)\n");
return -1;
}
if (stack_end || entry) {
print("bad executable (multiple thread commands)\n");
return -1;
}
if (lc->cmdsize < sizeof(struct thread_command)) {
print("bad executable (invalid load commands)\n");
return -1;
}
threadcmd = (struct thread_command *)lc;
err = load_thread(&entry, threadcmd);
if (err) return -1;
break;
default:
break;
}
}
// Done with the headers
VG_(free)(headers);
if (filetype == MH_EXECUTE) {
// Verify the necessary pieces for an executable:
// a stack
// a text segment
// an entry point (static or linker)
if (!stack_end || !stack_start) {
print("bad executable (no stack)\n");
return -1;
}
if (!text) {
print("bad executable (no text segment)\n");
return -1;
}
if (!entry && !linker_entry) {
print("bad executable (no entry point)\n");
return -1;
}
}
else if (filetype == MH_DYLINKER) {
// Verify the necessary pieces for a dylinker:
// an entry point
if (!entry) {
print("bad executable (no entry point)\n");
return -1;
}
}
if (out_stack_start) *out_stack_start = stack_start;
if (out_stack_end) *out_stack_end = stack_end;
if (out_text) *out_text = text;
if (out_entry) *out_entry = entry;
if (out_linker_entry) *out_linker_entry = linker_entry;
return 0;
}
Int ML_(am_readlink)(HChar* path, HChar* buf, UInt bufsiz)
{
SysRes res;
res = VG_(do_syscall3)(__NR_readlink, (UWord)path, (UWord)buf, bufsiz);
return sr_isError(res) ? -1 : sr_Res(res);
}
/*
Load a fat Mach-O executable.
*/
static int
load_fat_file(int fd, vki_off_t offset, vki_off_t size, unsigned long filetype,
const char *filename,
vki_uint8_t **out_stack_start, vki_uint8_t **out_stack_end,
vki_uint8_t **out_text, vki_uint8_t **out_entry, vki_uint8_t **out_linker_entry)
{
struct fat_header fh;
vki_off_t arch_offset;
int i;
cpu_type_t good_arch;
SysRes res;
#if defined(VGA_ppc32)
good_arch = CPU_TYPE_POWERPC;
#elif defined(VGA_ppc64)
good_arch = CPU_TYPE_POWERPC64;
#elif defined(VGA_x86)
good_arch = CPU_TYPE_I386;
#elif defined(VGA_amd64)
good_arch = CPU_TYPE_X86_64;
#else
# error unknown architecture
#endif
// Read fat header
// All fat contents are BIG-ENDIAN
if (size < sizeof(fh)) {
print("bad executable (bad fat header)\n");
return -1;
}
res = VG_(pread)(fd, &fh, sizeof(fh), offset);
if (sr_isError(res) || sr_Res(res) != sizeof(fh)) {
print("bad executable (bad fat header)\n");
return -1;
}
// Scan arch headers looking for a good one
arch_offset = offset + sizeof(fh);
fh.nfat_arch = VG_(ntohl)(fh.nfat_arch);
for (i = 0; i < fh.nfat_arch; i++) {
struct fat_arch arch;
if (arch_offset + sizeof(arch) > size) {
print("bad executable (corrupt fat archs)\n");
return -1;
}
res = VG_(pread)(fd, &arch, sizeof(arch), arch_offset);
arch_offset += sizeof(arch);
if (sr_isError(res) || sr_Res(res) != sizeof(arch)) {
VG_(printf)("bad executable (corrupt fat arch) %x %llu\n",
arch.cputype, (ULong)arch_offset);
return -1;
}
arch.cputype = VG_(ntohl)(arch.cputype);
arch.cpusubtype = VG_(ntohl)(arch.cpusubtype);
arch.offset = VG_(ntohl)(arch.offset);
arch.size = VG_(ntohl)(arch.size);
arch.align = VG_(ntohl)(arch.align);
if (arch.cputype == good_arch) {
// use this arch
if (arch.offset > size || arch.offset + arch.size > size) {
print("bad executable (corrupt fat arch 2)\n");
return -1;
}
return load_mach_file(fd, offset+arch.offset, arch.size, filetype,
filename, out_stack_start, out_stack_end,
out_text, out_entry, out_linker_entry);
}
}
print("bad executable (can't run on this machine)\n");
return -1;
}
Int ML_(am_getpid)( void )
{
SysRes sres = VG_(do_syscall0)(__NR_getpid);
aspacem_assert(!sr_isError(sres));
return sr_Res(sres);
}
/* Map a given fat or thin object aboard, find the thin part if
necessary, do some checks, and write details of both the fat and
thin parts into *ii. Returns False (and leaves the file unmapped)
on failure. Guarantees to return pointers to a valid(ish) Mach-O
image if it succeeds. */
static Bool map_image_aboard ( DebugInfo* di, /* only for err msgs */
/*OUT*/ImageInfo* ii, UChar* filename )
{
VG_(memset)(ii, 0, sizeof(*ii));
/* First off, try to map the thing in. */
{ SizeT size;
SysRes fd, sres;
struct vg_stat stat_buf;
fd = VG_(stat)(filename, &stat_buf);
if (sr_isError(fd)) {
ML_(symerr)(di, True, "Can't stat image (to determine its size)?!");
return False;
}
size = stat_buf.size;
fd = VG_(open)(filename, VKI_O_RDONLY, 0);
if (sr_isError(fd)) {
ML_(symerr)(di, True, "Can't open image to read symbols?!");
return False;
}
sres = VG_(am_mmap_file_float_valgrind)
( size, VKI_PROT_READ, sr_Res(fd), 0 );
if (sr_isError(sres)) {
ML_(symerr)(di, True, "Can't mmap image to read symbols?!");
return False;
}
VG_(close)(sr_Res(fd));
ii->img = (UChar*)sr_Res(sres);
ii->img_szB = size;
}
/* Now it's mapped in and we have .img and .img_szB set. Look for
the embedded Mach-O object. If not findable, unmap and fail. */
{ struct fat_header* fh_be;
struct fat_header fh;
struct MACH_HEADER* mh;
// Assume initially that we have a thin image, and update
// these if it turns out to be fat.
ii->macho_img = ii->img;
ii->macho_img_szB = ii->img_szB;
// Check for fat header.
if (ii->img_szB < sizeof(struct fat_header)) {
ML_(symerr)(di, True, "Invalid Mach-O file (0 too small).");
goto unmap_and_fail;
}
// Fat header is always BIG-ENDIAN
fh_be = (struct fat_header *)ii->img;
fh.magic = VG_(ntohl)(fh_be->magic);
fh.nfat_arch = VG_(ntohl)(fh_be->nfat_arch);
if (fh.magic == FAT_MAGIC) {
// Look for a good architecture.
struct fat_arch *arch_be;
struct fat_arch arch;
Int f;
if (ii->img_szB < sizeof(struct fat_header)
+ fh.nfat_arch * sizeof(struct fat_arch)) {
ML_(symerr)(di, True, "Invalid Mach-O file (1 too small).");
goto unmap_and_fail;
}
for (f = 0, arch_be = (struct fat_arch *)(fh_be+1);
f < fh.nfat_arch;
f++, arch_be++) {
Int cputype;
# if defined(VGA_ppc)
cputype = CPU_TYPE_POWERPC;
# elif defined(VGA_ppc64)
cputype = CPU_TYPE_POWERPC64;
# elif defined(VGA_x86)
cputype = CPU_TYPE_X86;
# elif defined(VGA_amd64)
cputype = CPU_TYPE_X86_64;
# else
# error "unknown architecture"
# endif
arch.cputype = VG_(ntohl)(arch_be->cputype);
arch.cpusubtype = VG_(ntohl)(arch_be->cpusubtype);
arch.offset = VG_(ntohl)(arch_be->offset);
arch.size = VG_(ntohl)(arch_be->size);
if (arch.cputype == cputype) {
if (ii->img_szB < arch.offset + arch.size) {
ML_(symerr)(di, True, "Invalid Mach-O file (2 too small).");
goto unmap_and_fail;
}
ii->macho_img = ii->img + arch.offset;
ii->macho_img_szB = arch.size;
break;
}
}
if (f == fh.nfat_arch) {
ML_(symerr)(di, True,
"No acceptable architecture found in fat file.");
goto unmap_and_fail;
}
}
/* Sanity check what we found. */
/* assured by logic above */
vg_assert(ii->img_szB >= sizeof(struct fat_header));
if (ii->macho_img_szB < sizeof(struct MACH_HEADER)) {
ML_(symerr)(di, True, "Invalid Mach-O file (3 too small).");
goto unmap_and_fail;
}
if (ii->macho_img_szB > ii->img_szB) {
ML_(symerr)(di, True, "Invalid Mach-O file (thin bigger than fat).");
goto unmap_and_fail;
}
if (ii->macho_img >= ii->img
&& ii->macho_img + ii->macho_img_szB <= ii->img + ii->img_szB) {
/* thin entirely within fat, as expected */
} else {
ML_(symerr)(di, True, "Invalid Mach-O file (thin not inside fat).");
goto unmap_and_fail;
}
mh = (struct MACH_HEADER *)ii->macho_img;
if (mh->magic != MAGIC) {
ML_(symerr)(di, True, "Invalid Mach-O file (bad magic).");
goto unmap_and_fail;
}
if (ii->macho_img_szB < sizeof(struct MACH_HEADER) + mh->sizeofcmds) {
ML_(symerr)(di, True, "Invalid Mach-O file (4 too small).");
goto unmap_and_fail;
}
}
vg_assert(ii->img);
vg_assert(ii->macho_img);
vg_assert(ii->img_szB > 0);
vg_assert(ii->macho_img_szB > 0);
vg_assert(ii->macho_img >= ii->img);
vg_assert(ii->macho_img + ii->macho_img_szB <= ii->img + ii->img_szB);
return True; /* success */
/*NOTREACHED*/
unmap_and_fail:
unmap_image(ii);
return False; /* bah! */
}
