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-rw-r--r--coregrind/m_ume/.svn/entries79
-rw-r--r--coregrind/m_ume/.svn/format1
-rw-r--r--coregrind/m_ume/.svn/prop-base/elf.c.svn-base13
-rw-r--r--coregrind/m_ume/.svn/prop-base/main.c.svn-base13
-rw-r--r--coregrind/m_ume/.svn/prop-base/script.c.svn-base13
-rw-r--r--coregrind/m_ume/.svn/text-base/elf.c.svn-base519
-rw-r--r--coregrind/m_ume/.svn/text-base/main.c.svn-base286
-rw-r--r--coregrind/m_ume/.svn/text-base/priv_ume.h.svn-base61
-rw-r--r--coregrind/m_ume/.svn/text-base/script.c.svn-base150
-rw-r--r--coregrind/m_ume/elf.c519
-rw-r--r--coregrind/m_ume/main.c286
-rw-r--r--coregrind/m_ume/priv_ume.h61
-rw-r--r--coregrind/m_ume/script.c150
13 files changed, 2151 insertions, 0 deletions
diff --git a/coregrind/m_ume/.svn/entries b/coregrind/m_ume/.svn/entries
new file mode 100644
index 0000000..4640964
--- /dev/null
+++ b/coregrind/m_ume/.svn/entries
@@ -0,0 +1,79 @@
+8
+
+dir
+9703
+svn://svn.valgrind.org/valgrind/trunk/coregrind/m_ume
+svn://svn.valgrind.org/valgrind
+
+
+
+2009-03-10T22:02:09.669944Z
+9344
+njn
+
+
+svn:special svn:externals svn:needs-lock
+
+
+
+
+
+
+
+
+
+
+
+a5019735-40e9-0310-863c-91ae7b9d1cf9
+
+script.c
+file
+
+
+
+
+2009-03-13T17:30:23.000000Z
+e4edb1c3650ba8c369c9f148363f11fe
+2009-03-10T22:02:09.669944Z
+9344
+njn
+has-props
+
+main.c
+file
+
+
+
+
+2009-03-13T17:30:23.000000Z
+7f41ba6a27ded5878cb6009968b33d4c
+2009-03-10T22:02:09.669944Z
+9344
+njn
+has-props
+
+elf.c
+file
+
+
+
+
+2009-03-13T17:30:23.000000Z
+251bf25de96fca92bfeb3c6f3819dba2
+2009-03-10T22:02:09.669944Z
+9344
+njn
+has-props
+
+priv_ume.h
+file
+
+
+
+
+2009-03-13T17:30:23.000000Z
+bdcbc5ed2e810f3865bab8657981ca5e
+2009-01-21T04:11:13.444440Z
+9008
+njn
+
diff --git a/coregrind/m_ume/.svn/format b/coregrind/m_ume/.svn/format
new file mode 100644
index 0000000..45a4fb7
--- /dev/null
+++ b/coregrind/m_ume/.svn/format
@@ -0,0 +1 @@
+8
diff --git a/coregrind/m_ume/.svn/prop-base/elf.c.svn-base b/coregrind/m_ume/.svn/prop-base/elf.c.svn-base
new file mode 100644
index 0000000..fe534b9
--- /dev/null
+++ b/coregrind/m_ume/.svn/prop-base/elf.c.svn-base
@@ -0,0 +1,13 @@
+K 13
+svn:eol-style
+V 6
+native
+K 12
+svn:keywords
+V 23
+author date id revision
+K 13
+svn:mergeinfo
+V 0
+
+END
diff --git a/coregrind/m_ume/.svn/prop-base/main.c.svn-base b/coregrind/m_ume/.svn/prop-base/main.c.svn-base
new file mode 100644
index 0000000..fe534b9
--- /dev/null
+++ b/coregrind/m_ume/.svn/prop-base/main.c.svn-base
@@ -0,0 +1,13 @@
+K 13
+svn:eol-style
+V 6
+native
+K 12
+svn:keywords
+V 23
+author date id revision
+K 13
+svn:mergeinfo
+V 0
+
+END
diff --git a/coregrind/m_ume/.svn/prop-base/script.c.svn-base b/coregrind/m_ume/.svn/prop-base/script.c.svn-base
new file mode 100644
index 0000000..fe534b9
--- /dev/null
+++ b/coregrind/m_ume/.svn/prop-base/script.c.svn-base
@@ -0,0 +1,13 @@
+K 13
+svn:eol-style
+V 6
+native
+K 12
+svn:keywords
+V 23
+author date id revision
+K 13
+svn:mergeinfo
+V 0
+
+END
diff --git a/coregrind/m_ume/.svn/text-base/elf.c.svn-base b/coregrind/m_ume/.svn/text-base/elf.c.svn-base
new file mode 100644
index 0000000..b3edc20
--- /dev/null
+++ b/coregrind/m_ume/.svn/text-base/elf.c.svn-base
@@ -0,0 +1,519 @@
+
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve() for ELF executables m_ume_elf.c ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2000-2009 Julian Seward
+ jseward@acm.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.
+*/
+
+#include "pub_core_basics.h"
+#include "pub_core_vki.h"
+
+#include "pub_core_aspacemgr.h" // various mapping fns
+#include "pub_core_debuglog.h"
+#include "pub_core_libcassert.h" // VG_(exit), vg_assert
+#include "pub_core_libcbase.h" // VG_(memcmp), etc
+#include "pub_core_libcprint.h"
+#include "pub_core_libcfile.h" // VG_(open) et al
+#include "pub_core_machine.h" // VG_ELF_CLASS (XXX: which should be moved)
+#include "pub_core_mallocfree.h" // VG_(malloc), VG_(free)
+#include "pub_core_syscall.h" // VG_(strerror)
+#include "pub_core_ume.h" // self
+
+#include "priv_ume.h"
+
+
+#if defined(HAVE_ELF)
+
+/* --- !!! --- EXTERNAL HEADERS start --- !!! --- */
+#define _GNU_SOURCE
+#define _FILE_OFFSET_BITS 64
+/* This is for ELF types etc, and also the AT_ constants. */
+#include <elf.h>
+/* --- !!! --- EXTERNAL HEADERS end --- !!! --- */
+
+
+#if VG_WORDSIZE == 8
+#define ESZ(x) Elf64_##x
+#elif VG_WORDSIZE == 4
+#define ESZ(x) Elf32_##x
+#else
+#error VG_WORDSIZE needs to ==4 or ==8
+#endif
+
+struct elfinfo
+{
+ ESZ(Ehdr) e;
+ ESZ(Phdr) *p;
+ Int fd;
+};
+
+static void check_mmap(SysRes res, Addr base, SizeT len)
+{
+ if (res.isError) {
+ VG_(printf)("valgrind: mmap(0x%llx, %lld) failed in UME "
+ "with error %lu (%s).\n",
+ (ULong)base, (Long)len,
+ res.err, VG_(strerror)(res.err) );
+ if (res.err == VKI_EINVAL) {
+ VG_(printf)("valgrind: this can be caused by executables with "
+ "very large text, data or bss segments.\n");
+ }
+ VG_(exit)(1);
+ }
+}
+
+/*------------------------------------------------------------*/
+/*--- Loading ELF files ---*/
+/*------------------------------------------------------------*/
+
+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 (sres.isError || sres.res != sizeof(e->e)) {
+ VG_(printf)("valgrind: %s: can't read ELF header: %s\n",
+ filename, VG_(strerror)(sres.err));
+ 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 (sres.isError || sres.res != phsz) {
+ VG_(printf)("valgrind: can't read phdr: %s\n",
+ VG_(strerror)(sres.err));
+ VG_(free)(e->p);
+ goto bad;
+ }
+
+ return e;
+
+ bad:
+ VG_(free)(e);
+ return NULL;
+}
+
+/* Map an ELF file. Returns the brk address. */
+static
+ESZ(Addr) mapelf(struct elfinfo *e, ESZ(Addr) base)
+{
+ Int i;
+ SysRes res;
+ ESZ(Addr) elfbrk = 0;
+
+ for (i = 0; i < e->e.e_phnum; i++) {
+ ESZ(Phdr) *ph = &e->p[i];
+ ESZ(Addr) addr, brkaddr;
+ ESZ(Word) memsz;
+
+ if (ph->p_type != PT_LOAD)
+ continue;
+
+ addr = ph->p_vaddr+base;
+ memsz = ph->p_memsz;
+ brkaddr = addr+memsz;
+
+ if (brkaddr > elfbrk)
+ elfbrk = brkaddr;
+ }
+
+ for (i = 0; i < e->e.e_phnum; i++) {
+ ESZ(Phdr) *ph = &e->p[i];
+ ESZ(Addr) addr, bss, brkaddr;
+ ESZ(Off) off;
+ ESZ(Word) filesz;
+ ESZ(Word) memsz;
+ unsigned prot = 0;
+
+ if (ph->p_type != PT_LOAD)
+ continue;
+
+ if (ph->p_flags & PF_X) prot |= VKI_PROT_EXEC;
+ if (ph->p_flags & PF_W) prot |= VKI_PROT_WRITE;
+ if (ph->p_flags & PF_R) prot |= VKI_PROT_READ;
+
+ addr = ph->p_vaddr+base;
+ off = ph->p_offset;
+ filesz = ph->p_filesz;
+ bss = addr+filesz;
+ memsz = ph->p_memsz;
+ brkaddr = addr+memsz;
+
+ // Tom says: In the following, do what the Linux kernel does and only
+ // map the pages that are required instead of rounding everything to
+ // the specified alignment (ph->p_align). (AMD64 doesn't work if you
+ // use ph->p_align -- part of stage2's memory gets trashed somehow.)
+ //
+ // The condition handles the case of a zero-length segment.
+ if (VG_PGROUNDUP(bss)-VG_PGROUNDDN(addr) > 0) {
+ if (0) VG_(debugLog)(0,"ume","mmap_file_fixed_client #1\n");
+ res = VG_(am_mmap_file_fixed_client)(
+ VG_PGROUNDDN(addr),
+ VG_PGROUNDUP(bss)-VG_PGROUNDDN(addr),
+ prot, /*VKI_MAP_FIXED|VKI_MAP_PRIVATE, */
+ e->fd, VG_PGROUNDDN(off)
+ );
+ if (0) VG_(am_show_nsegments)(0,"after #1");
+ check_mmap(res, VG_PGROUNDDN(addr),
+ VG_PGROUNDUP(bss)-VG_PGROUNDDN(addr));
+ }
+
+ // if memsz > filesz, fill the remainder with zeroed pages
+ if (memsz > filesz) {
+ UInt bytes;
+
+ bytes = VG_PGROUNDUP(brkaddr)-VG_PGROUNDUP(bss);
+ if (bytes > 0) {
+ if (0) VG_(debugLog)(0,"ume","mmap_anon_fixed_client #2\n");
+ res = VG_(am_mmap_anon_fixed_client)(
+ VG_PGROUNDUP(bss), bytes,
+ prot
+ );
+ if (0) VG_(am_show_nsegments)(0,"after #2");
+ check_mmap(res, VG_PGROUNDUP(bss), bytes);
+ }
+
+ bytes = bss & (VKI_PAGE_SIZE - 1);
+
+ // The 'prot' condition allows for a read-only bss
+ if ((prot & VKI_PROT_WRITE) && (bytes > 0)) {
+ bytes = VKI_PAGE_SIZE - bytes;
+ VG_(memset)((char *)bss, 0, bytes);
+ }
+ }
+ }
+
+ return elfbrk;
+}
+
+Bool VG_(match_ELF)(Char *hdr, Int len)
+{
+ ESZ(Ehdr) *e = (ESZ(Ehdr) *)hdr;
+ return (len > sizeof(*e)) && VG_(memcmp)(&e->e_ident[0], ELFMAG, SELFMAG) == 0;
+}
+
+
+/* load_ELF pulls an ELF executable into the address space, prepares
+ it for execution, and writes info about it into INFO. In
+ particular it fills in .init_eip, which is the starting point.
+
+ Returns zero on success, non-zero (a VKI_E.. value) on failure.
+
+ The sequence of activities is roughly as follows:
+
+ - use readelf() to extract program header info from the exe file.
+
+ - scan the program header, collecting info (not sure what all those
+ info-> fields are, or whether they are used, but still) and in
+ particular looking out fo the PT_INTERP header, which describes
+ the interpreter. If such a field is found, the space needed to
+ hold the interpreter is computed into interp_size.
+
+ - map the executable in, by calling mapelf(). This maps in all
+ loadable sections, and I _think_ also creates any .bss areas
+ required. mapelf() returns the address just beyond the end of
+ the furthest-along mapping it creates. The executable is mapped
+ starting at EBASE, which is usually read from it (eg, 0x8048000
+ etc) except if it's a PIE, in which case I'm not sure what
+ happens.
+
+ The returned address is recorded in info->brkbase as the start
+ point of the brk (data) segment, as it is traditional to place
+ the data segment just after the executable. Neither load_ELF nor
+ mapelf creates the brk segment, though: that is for the caller of
+ load_ELF to attend to.
+
+ - If the initial phdr scan didn't find any mention of an
+ interpreter (interp == NULL), this must be a statically linked
+ executable, and we're pretty much done.
+
+ - Otherwise, we need to use mapelf() a second time to load the
+ interpreter. The interpreter can go anywhere, but mapelf() wants
+ to be told a specific address to put it at. So an advisory query
+ is passed to aspacem, asking where it would put an anonymous
+ client mapping of size INTERP_SIZE. That address is then used
+ as the mapping address for the interpreter.
+
+ - The entry point in INFO is set to the interpreter's entry point,
+ and we're done. */
+Int VG_(load_ELF)(Int fd, const HChar* name, /*MOD*/ExeInfo* info)
+{
+ SysRes sres;
+ struct elfinfo *e;
+ struct elfinfo *interp = NULL;
+ ESZ(Addr) minaddr = ~0; /* lowest mapped address */
+ ESZ(Addr) maxaddr = 0; /* highest mapped address */
+ ESZ(Addr) interp_addr = 0; /* interpreter (ld.so) address */
+ ESZ(Word) interp_size = 0; /* interpreter size */
+ ESZ(Word) interp_align = VKI_PAGE_SIZE;
+ Int i;
+ void *entry;
+ ESZ(Addr) ebase = 0;
+
+ /* The difference between where the interpreter got mapped and
+ where it asked to be mapped. Needed for computing the ppc64 ELF
+ entry point and initial tocptr (R2) value. */
+ ESZ(Word) interp_offset = 0;
+
+#ifdef HAVE_PIE
+ ebase = info->exe_base;
+#endif
+
+ e = readelf(fd, name);
+
+ if (e == NULL)
+ return VKI_ENOEXEC;
+
+ /* The kernel maps position-independent executables at TASK_SIZE*2/3;
+ duplicate this behavior as close as we can. */
+ if (e->e.e_type == ET_DYN && ebase == 0) {
+ ebase = VG_PGROUNDDN(info->exe_base
+ + (info->exe_end - info->exe_base) * 2 / 3);
+ /* We really don't want to load PIEs at zero or too close. It
+ works, but it's unrobust (NULL pointer reads and writes
+ become legit, which is really bad) and causes problems for
+ exp-ptrcheck, which assumes all numbers below 1MB are
+ nonpointers. So, hackily, move it above 1MB. */
+ /* Later .. is appears ppc32-linux tries to put [vdso] at 1MB,
+ which totally screws things up, because nothing else can go
+ there. So bump the hacky load addess along by 0x8000, to
+ 0x108000. */
+ if (ebase < 0x108000)
+ ebase = 0x108000;
+ }
+
+ info->phnum = e->e.e_phnum;
+ info->entry = e->e.e_entry + ebase;
+ info->phdr = 0;
+
+ for (i = 0; i < e->e.e_phnum; i++) {
+ ESZ(Phdr) *ph = &e->p[i];
+
+ switch(ph->p_type) {
+ case PT_PHDR:
+ info->phdr = ph->p_vaddr + ebase;
+ break;
+
+ case PT_LOAD:
+ if (ph->p_vaddr < minaddr)
+ minaddr = ph->p_vaddr;
+ if (ph->p_vaddr+ph->p_memsz > maxaddr)
+ maxaddr = ph->p_vaddr+ph->p_memsz;
+ break;
+
+ case PT_INTERP: {
+ HChar *buf = VG_(malloc)("ume.LE.1", ph->p_filesz+1);
+ Int j;
+ Int intfd;
+ Int baseaddr_set;
+
+ vg_assert(buf);
+ VG_(pread)(fd, buf, ph->p_filesz, ph->p_offset);
+ buf[ph->p_filesz] = '\0';
+
+ sres = VG_(open)(buf, VKI_O_RDONLY, 0);
+ if (sres.isError) {
+ VG_(printf)("valgrind: m_ume.c: can't open interpreter\n");
+ VG_(exit)(1);
+ }
+ intfd = sres.res;
+
+ interp = readelf(intfd, buf);
+ if (interp == NULL) {
+ VG_(printf)("valgrind: m_ume.c: can't read interpreter\n");
+ return 1;
+ }
+ VG_(free)(buf);
+
+ baseaddr_set = 0;
+ for (j = 0; j < interp->e.e_phnum; j++) {
+ ESZ(Phdr) *iph = &interp->p[j];
+ ESZ(Addr) end;
+
+ if (iph->p_type != PT_LOAD)
+ continue;
+
+ if (!baseaddr_set) {
+ interp_addr = iph->p_vaddr;
+ interp_align = iph->p_align;
+ baseaddr_set = 1;
+ }
+
+ /* assumes that all segments in the interp are close */
+ end = (iph->p_vaddr - interp_addr) + iph->p_memsz;
+
+ if (end > interp_size)
+ interp_size = end;
+ }
+ break;
+
+ default:
+ // do nothing
+ break;
+ }
+ }
+ }
+
+ if (info->phdr == 0)
+ info->phdr = minaddr + ebase + e->e.e_phoff;
+
+ if (info->exe_base != info->exe_end) {
+ if (minaddr >= maxaddr ||
+ (minaddr + ebase < info->exe_base ||
+ maxaddr + ebase > info->exe_end)) {
+ VG_(printf)("Executable range %p-%p is outside the\n"
+ "acceptable range %p-%p\n",
+ (char *)minaddr + ebase, (char *)maxaddr + ebase,
+ (char *)info->exe_base, (char *)info->exe_end);
+ return VKI_ENOMEM;
+ }
+ }
+
+ info->brkbase = mapelf(e, ebase); /* map the executable */
+
+ if (info->brkbase == 0)
+ return VKI_ENOMEM;
+
+ if (interp != NULL) {
+ /* reserve a chunk of address space for interpreter */
+ MapRequest mreq;
+ Addr advised;
+ Bool ok;
+
+ /* Don't actually reserve the space. Just get an advisory
+ indicating where it would be allocated, and pass that to
+ mapelf(), which in turn asks aspacem to do some fixed maps at
+ the specified address. This is a bit of hack, but it should
+ work because there should be no intervening transactions with
+ aspacem which could cause those fixed maps to fail.
+
+ Placement policy is:
+
+ if the interpreter asks to be loaded at zero
+ ignore that and put it wherever we like (mappings at zero
+ are bad news)
+ else
+ try and put it where it asks for, but if that doesn't work,
+ just put it anywhere.
+ */
+ if (interp_addr == 0) {
+ mreq.rkind = MAny;
+ mreq.start = 0;
+ mreq.len = interp_size;
+ } else {
+ mreq.rkind = MHint;
+ mreq.start = interp_addr;
+ mreq.len = interp_size;
+ }
+
+ advised = VG_(am_get_advisory)( &mreq, True/*client*/, &ok );
+
+ if (!ok) {
+ /* bomb out */
+ SysRes res = VG_(mk_SysRes_Error)(VKI_EINVAL);
+ if (0) VG_(printf)("reserve for interp: failed\n");
+ check_mmap(res, (Addr)interp_addr, interp_size);
+ /*NOTREACHED*/
+ }
+
+ (void)mapelf(interp, (ESZ(Addr))advised - interp_addr);
+
+ VG_(close)(interp->fd);
+
+ entry = (void *)(advised - interp_addr + interp->e.e_entry);
+ info->interp_base = (ESZ(Addr))advised;
+ interp_offset = advised - interp_addr;
+
+ VG_(free)(interp->p);
+ VG_(free)(interp);
+ } else
+ entry = (void *)(ebase + e->e.e_entry);
+
+ info->exe_base = minaddr + ebase;
+ info->exe_end = maxaddr + ebase;
+
+#if defined(VGP_ppc64_linux)
+ /* On PPC64, a func ptr is represented by a TOC entry ptr. This
+ TOC entry contains three words; the first word is the function
+ address, the second word is the TOC ptr (r2), and the third word
+ is the static chain value. */
+ info->init_ip = ((ULong*)entry)[0];
+ info->init_toc = ((ULong*)entry)[1];
+ info->init_ip += interp_offset;
+ info->init_toc += interp_offset;
+#else
+ info->init_ip = (Addr)entry;
+ info->init_toc = 0; /* meaningless on this platform */
+#endif
+ VG_(free)(e->p);
+ VG_(free)(e);
+
+ return 0;
+}
+
+#endif /* defined(HAVE_ELF) */
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
diff --git a/coregrind/m_ume/.svn/text-base/main.c.svn-base b/coregrind/m_ume/.svn/text-base/main.c.svn-base
new file mode 100644
index 0000000..786e176
--- /dev/null
+++ b/coregrind/m_ume/.svn/text-base/main.c.svn-base
@@ -0,0 +1,286 @@
+
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve(), and other stuff shared between stage1 ---*/
+/*--- and stage2. m_ume.c ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2000-2009 Julian Seward
+ jseward@acm.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.
+*/
+
+
+#include "pub_core_basics.h"
+#include "pub_core_vki.h"
+
+#include "pub_core_libcbase.h"
+#include "pub_core_libcassert.h" // VG_(exit), vg_assert
+#include "pub_core_libcfile.h" // VG_(close) et al
+#include "pub_core_libcprint.h" // VG_(message)
+#include "pub_core_mallocfree.h" // VG_(strdup)
+#include "pub_core_syscall.h" // VG_(mk_SysRes_Error)
+#include "pub_core_options.h" // VG_(clo_xml)
+#include "pub_core_ume.h" // self
+
+#include "priv_ume.h"
+
+
+typedef struct {
+ const HChar *name;
+ Bool (*match_fn)(Char *hdr, Int len);
+ Int (*load_fn)(Int fd, const HChar *name, ExeInfo *info);
+} ExeHandler;
+
+static ExeHandler exe_handlers[] = {
+#if defined(HAVE_ELF)
+ { "ELF", VG_(match_ELF), VG_(load_ELF) },
+#endif
+#if defined(HAVE_SCRIPT)
+ { "script", VG_(match_script), VG_(load_script) },
+#endif
+};
+#define EXE_HANDLER_COUNT (sizeof(exe_handlers)/sizeof(exe_handlers[0]))
+
+
+// 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 (res.isError) {
+ return res;
+ }
+ fd = 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 (res.isError || res.res != bufsz) {
+ VG_(close)(fd);
+ return VG_(mk_SysRes_Error)(VKI_EACCES);
+ }
+ bufsz = 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 (!res.isError && out_fd) {
+ *out_fd = fd;
+ } else {
+ VG_(close)(fd);
+ }
+
+ return res;
+}
+
+// returns: 0 = success, non-0 is failure
+//
+// We can execute only binaries (ELF, etc) or scripts that begin with "#!".
+// (Not, for example, scripts that don't begin with "#!"; see the
+// VG_(do_exec)() invocation from m_main.c for how that's handled.)
+Int VG_(do_exec_inner)(const HChar* exe, ExeInfo* info)
+{
+ SysRes res;
+ Int fd;
+ Int ret;
+
+ res = VG_(pre_exec_check)(exe, &fd, False/*allow_setuid*/);
+ if (res.isError)
+ return res.err;
+
+ vg_assert2(res.res >= 0 && res.res < EXE_HANDLER_COUNT,
+ "invalid VG_(pre_exec_check) result");
+
+ ret = (*exe_handlers[res.res].load_fn)(fd, exe, info);
+
+ VG_(close)(fd);
+
+ return ret;
+}
+
+
+static Bool is_hash_bang_file(Char* f)
+{
+ SysRes res = VG_(open)(f, VKI_O_RDONLY, 0);
+ if (!res.isError) {
+ Char buf[3] = {0,0,0};
+ Int fd = res.res;
+ Int n = VG_(read)(fd, buf, 2);
+ if (n == 2 && VG_STREQ("#!", buf))
+ return True;
+ }
+ return False;
+}
+
+// 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 (!res.isError) {
+ UChar buf[80];
+ Int fd = 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
+ }
+}
+
+// If the do_exec fails we try to emulate what the shell does (I used
+// bash as a guide). It's worth noting that the shell can execute some
+// things that VG_(do_exec)() (which subsitutes for the kernel's exec())
+// will refuse to (eg. scripts lacking a "#!" prefix).
+static Int do_exec_shell_followup(Int ret, HChar* exe_name, ExeInfo* info)
+{
+ Char* default_interp_name = "/bin/sh";
+ SysRes res;
+ struct vg_stat st;
+
+ if (VKI_ENOEXEC == ret) {
+ // It was an executable file, but in an unacceptable format. Probably
+ // is a shell script lacking the "#!" prefix; try to execute it so.
+
+ // Is it a binary file?
+ if (is_binary_file(exe_name)) {
+ VG_(printf)("valgrind: %s: cannot execute binary file\n", exe_name);
+ VG_(exit)(126); // 126 == NOEXEC
+ }
+
+ // Looks like a script. Run it with /bin/sh. This includes
+ // zero-length files.
+
+ info->interp_name = VG_(strdup)("ume.desf.1", default_interp_name);
+ info->interp_args = NULL;
+ if (info->argv && info->argv[0] != NULL)
+ info->argv[0] = (char *)exe_name;
+
+ ret = VG_(do_exec_inner)(info->interp_name, info);
+
+ if (0 != ret) {
+ // Something went wrong with executing the default interpreter
+ VG_(printf)("valgrind: %s: bad interpreter (%s): %s\n",
+ exe_name, info->interp_name, VG_(strerror)(ret));
+ VG_(exit)(126); // 126 == NOEXEC
+ }
+
+ } else if (0 != ret) {
+ // Something else went wrong. Try to make the error more specific,
+ // and then print a message and abort.
+
+ // Was it a directory?
+ res = VG_(stat)(exe_name, &st);
+ if (!res.isError && VKI_S_ISDIR(st.st_mode)) {
+ VG_(printf)("valgrind: %s: is a directory\n", exe_name);
+
+ // Was it not executable?
+ } else if (0 != VG_(check_executable)(NULL, exe_name,
+ False/*allow_setuid*/)) {
+ VG_(printf)("valgrind: %s: %s\n", exe_name, VG_(strerror)(ret));
+
+ // Did it start with "#!"? If so, it must have been a bad interpreter.
+ } else if (is_hash_bang_file(exe_name)) {
+ VG_(printf)("valgrind: %s: bad interpreter: %s\n",
+ exe_name, VG_(strerror)(ret));
+
+ // Otherwise it was something else.
+ } else {
+ VG_(printf)("valgrind: %s: %s\n", exe_name, VG_(strerror)(ret));
+ }
+ // 126 means NOEXEC; I think this is Posix, and that in some cases we
+ // should be returning 127, meaning NOTFOUND. Oh well.
+ VG_(exit)(126);
+ }
+ return ret;
+}
+
+
+// This emulates the kernel's exec(). If it fails, it then emulates the
+// shell's handling of the situation.
+// See ume.h for an indication of which entries of 'info' are inputs, which
+// are outputs, and which are both.
+/* returns: 0 = success, non-0 is failure */
+Int VG_(do_exec)(const HChar* exe_name, ExeInfo* info)
+{
+ Int ret;
+
+ info->interp_name = NULL;
+ info->interp_args = NULL;
+
+ ret = VG_(do_exec_inner)(exe_name, info);
+
+ if (0 != ret) {
+ Char* exe_name_casted = (Char*)exe_name;
+ ret = do_exec_shell_followup(ret, exe_name_casted, info);
+ }
+ return ret;
+}
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
diff --git a/coregrind/m_ume/.svn/text-base/priv_ume.h.svn-base b/coregrind/m_ume/.svn/text-base/priv_ume.h.svn-base
new file mode 100644
index 0000000..2ac4189
--- /dev/null
+++ b/coregrind/m_ume/.svn/text-base/priv_ume.h.svn-base
@@ -0,0 +1,61 @@
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve(). priv_ume.h ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2000-2005 Julian Seward
+ jseward@acm.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.
+*/
+
+#ifndef __PRIV_UME_H
+#define __PRIV_UME_H
+
+#if defined(VGO_linux)
+# define HAVE_ELF
+# define HAVE_SCRIPT
+
+#elif defined(VGO_aix5)
+// The AIX port doesn't use UME.
+
+#else
+#error unknown architecture
+#endif
+
+extern int VG_(do_exec_inner)(const HChar *exe, ExeInfo *info);
+
+#if defined(HAVE_ELF)
+extern Bool VG_(match_ELF) ( Char *hdr, Int len );
+extern Int VG_(load_ELF) ( Int fd, const HChar *name, ExeInfo *info );
+#endif
+
+#if defined(HAVE_SCRIPT)
+extern Bool VG_(match_script) ( Char *hdr, Int len );
+extern Int VG_(load_script) ( Int fd, const HChar *name, ExeInfo *info );
+#endif
+
+#endif /* __PRIV_UME_H */
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
+
diff --git a/coregrind/m_ume/.svn/text-base/script.c.svn-base b/coregrind/m_ume/.svn/text-base/script.c.svn-base
new file mode 100644
index 0000000..8df563e
--- /dev/null
+++ b/coregrind/m_ume/.svn/text-base/script.c.svn-base
@@ -0,0 +1,150 @@
+
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve() for #! scripts. m_ume_script.c ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2000-2009 Julian Seward
+ jseward@acm.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.
+*/
+
+#include "pub_core_basics.h"
+#include "pub_core_vki.h"
+
+#include "pub_core_libcbase.h"
+#include "pub_core_libcassert.h" // VG_(exit), vg_assert
+#include "pub_core_libcfile.h" // VG_(close) et al
+#include "pub_core_libcprint.h"
+#include "pub_core_mallocfree.h" // VG_(strdup)
+#include "pub_core_ume.h" // self
+
+#include "priv_ume.h" // self
+
+
+#if defined(HAVE_SCRIPT)
+
+Bool VG_(match_script)(Char *hdr, Int len)
+{
+ Char* end = hdr + len;
+ Char* interp = hdr + 2;
+
+ // len < 4: need '#', '!', plus at least a '/' and one more char
+ if (len < 4) return False;
+ if (0 != VG_(memcmp)(hdr, "#!", 2)) return False;
+
+ // Find interpreter name, make sure it's an absolute path (starts with
+ // '/') and has at least one more char. First, skip over any space
+ // between the #! and the start of the interpreter name
+ while (interp < end && VG_(isspace)(*interp)) interp++;
+
+ // overrun?
+ if (interp >= end) return False; // can't find start of interp name
+
+ // interp should now point at the /
+ if (*interp != '/') return False; // absolute path only for interpreter
+
+ // check for something plausible after the /
+ interp++;
+ if (interp >= end) return False;
+ if (VG_(isspace)(*interp)) return False;
+
+ // Here we should get the full interpreter name and check it with
+ // check_executable(). See the "EXEC FAILED" failure when running shell
+ // for an example.
+
+ return True; // looks like a #! script
+}
+
+
+/* returns: 0 = success, non-0 is failure */
+Int VG_(load_script)(Int fd, const HChar* name, ExeInfo* info)
+{
+ Char hdr[4096];
+ Int len = 4096;
+ Int eol;
+ Char* interp;
+ Char* end;
+ Char* cp;
+ Char* arg = NULL;
+ SysRes res;
+
+ // Read the first part of the file.
+ res = VG_(pread)(fd, hdr, len, 0);
+ if (res.isError) {
+ VG_(close)(fd);
+ return VKI_EACCES;
+ } else {
+ len = res.res;
+ }
+
+ vg_assert('#' == hdr[0] && '!' == hdr[1]);
+
+ end = hdr + len;
+ interp = hdr + 2;
+ while (interp < end && VG_(isspace)(*interp))
+ interp++;
+
+ vg_assert(*interp == '/'); /* absolute path only for interpreter */
+
+ /* 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';
+ }
+
+ 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] = (char *)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);
+}
+
+#endif /* defined(HAVE_SCRIPT) */
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
diff --git a/coregrind/m_ume/elf.c b/coregrind/m_ume/elf.c
new file mode 100644
index 0000000..b3edc20
--- /dev/null
+++ b/coregrind/m_ume/elf.c
@@ -0,0 +1,519 @@
+
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve() for ELF executables m_ume_elf.c ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2000-2009 Julian Seward
+ jseward@acm.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.
+*/
+
+#include "pub_core_basics.h"
+#include "pub_core_vki.h"
+
+#include "pub_core_aspacemgr.h" // various mapping fns
+#include "pub_core_debuglog.h"
+#include "pub_core_libcassert.h" // VG_(exit), vg_assert
+#include "pub_core_libcbase.h" // VG_(memcmp), etc
+#include "pub_core_libcprint.h"
+#include "pub_core_libcfile.h" // VG_(open) et al
+#include "pub_core_machine.h" // VG_ELF_CLASS (XXX: which should be moved)
+#include "pub_core_mallocfree.h" // VG_(malloc), VG_(free)
+#include "pub_core_syscall.h" // VG_(strerror)
+#include "pub_core_ume.h" // self
+
+#include "priv_ume.h"
+
+
+#if defined(HAVE_ELF)
+
+/* --- !!! --- EXTERNAL HEADERS start --- !!! --- */
+#define _GNU_SOURCE
+#define _FILE_OFFSET_BITS 64
+/* This is for ELF types etc, and also the AT_ constants. */
+#include <elf.h>
+/* --- !!! --- EXTERNAL HEADERS end --- !!! --- */
+
+
+#if VG_WORDSIZE == 8
+#define ESZ(x) Elf64_##x
+#elif VG_WORDSIZE == 4
+#define ESZ(x) Elf32_##x
+#else
+#error VG_WORDSIZE needs to ==4 or ==8
+#endif
+
+struct elfinfo
+{
+ ESZ(Ehdr) e;
+ ESZ(Phdr) *p;
+ Int fd;
+};
+
+static void check_mmap(SysRes res, Addr base, SizeT len)
+{
+ if (res.isError) {
+ VG_(printf)("valgrind: mmap(0x%llx, %lld) failed in UME "
+ "with error %lu (%s).\n",
+ (ULong)base, (Long)len,
+ res.err, VG_(strerror)(res.err) );
+ if (res.err == VKI_EINVAL) {
+ VG_(printf)("valgrind: this can be caused by executables with "
+ "very large text, data or bss segments.\n");
+ }
+ VG_(exit)(1);
+ }
+}
+
+/*------------------------------------------------------------*/
+/*--- Loading ELF files ---*/
+/*------------------------------------------------------------*/
+
+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 (sres.isError || sres.res != sizeof(e->e)) {
+ VG_(printf)("valgrind: %s: can't read ELF header: %s\n",
+ filename, VG_(strerror)(sres.err));
+ 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 (sres.isError || sres.res != phsz) {
+ VG_(printf)("valgrind: can't read phdr: %s\n",
+ VG_(strerror)(sres.err));
+ VG_(free)(e->p);
+ goto bad;
+ }
+
+ return e;
+
+ bad:
+ VG_(free)(e);
+ return NULL;
+}
+
+/* Map an ELF file. Returns the brk address. */
+static
+ESZ(Addr) mapelf(struct elfinfo *e, ESZ(Addr) base)
+{
+ Int i;
+ SysRes res;
+ ESZ(Addr) elfbrk = 0;
+
+ for (i = 0; i < e->e.e_phnum; i++) {
+ ESZ(Phdr) *ph = &e->p[i];
+ ESZ(Addr) addr, brkaddr;
+ ESZ(Word) memsz;
+
+ if (ph->p_type != PT_LOAD)
+ continue;
+
+ addr = ph->p_vaddr+base;
+ memsz = ph->p_memsz;
+ brkaddr = addr+memsz;
+
+ if (brkaddr > elfbrk)
+ elfbrk = brkaddr;
+ }
+
+ for (i = 0; i < e->e.e_phnum; i++) {
+ ESZ(Phdr) *ph = &e->p[i];
+ ESZ(Addr) addr, bss, brkaddr;
+ ESZ(Off) off;
+ ESZ(Word) filesz;
+ ESZ(Word) memsz;
+ unsigned prot = 0;
+
+ if (ph->p_type != PT_LOAD)
+ continue;
+
+ if (ph->p_flags & PF_X) prot |= VKI_PROT_EXEC;
+ if (ph->p_flags & PF_W) prot |= VKI_PROT_WRITE;
+ if (ph->p_flags & PF_R) prot |= VKI_PROT_READ;
+
+ addr = ph->p_vaddr+base;
+ off = ph->p_offset;
+ filesz = ph->p_filesz;
+ bss = addr+filesz;
+ memsz = ph->p_memsz;
+ brkaddr = addr+memsz;
+
+ // Tom says: In the following, do what the Linux kernel does and only
+ // map the pages that are required instead of rounding everything to
+ // the specified alignment (ph->p_align). (AMD64 doesn't work if you
+ // use ph->p_align -- part of stage2's memory gets trashed somehow.)
+ //
+ // The condition handles the case of a zero-length segment.
+ if (VG_PGROUNDUP(bss)-VG_PGROUNDDN(addr) > 0) {
+ if (0) VG_(debugLog)(0,"ume","mmap_file_fixed_client #1\n");
+ res = VG_(am_mmap_file_fixed_client)(
+ VG_PGROUNDDN(addr),
+ VG_PGROUNDUP(bss)-VG_PGROUNDDN(addr),
+ prot, /*VKI_MAP_FIXED|VKI_MAP_PRIVATE, */
+ e->fd, VG_PGROUNDDN(off)
+ );
+ if (0) VG_(am_show_nsegments)(0,"after #1");
+ check_mmap(res, VG_PGROUNDDN(addr),
+ VG_PGROUNDUP(bss)-VG_PGROUNDDN(addr));
+ }
+
+ // if memsz > filesz, fill the remainder with zeroed pages
+ if (memsz > filesz) {
+ UInt bytes;
+
+ bytes = VG_PGROUNDUP(brkaddr)-VG_PGROUNDUP(bss);
+ if (bytes > 0) {
+ if (0) VG_(debugLog)(0,"ume","mmap_anon_fixed_client #2\n");
+ res = VG_(am_mmap_anon_fixed_client)(
+ VG_PGROUNDUP(bss), bytes,
+ prot
+ );
+ if (0) VG_(am_show_nsegments)(0,"after #2");
+ check_mmap(res, VG_PGROUNDUP(bss), bytes);
+ }
+
+ bytes = bss & (VKI_PAGE_SIZE - 1);
+
+ // The 'prot' condition allows for a read-only bss
+ if ((prot & VKI_PROT_WRITE) && (bytes > 0)) {
+ bytes = VKI_PAGE_SIZE - bytes;
+ VG_(memset)((char *)bss, 0, bytes);
+ }
+ }
+ }
+
+ return elfbrk;
+}
+
+Bool VG_(match_ELF)(Char *hdr, Int len)
+{
+ ESZ(Ehdr) *e = (ESZ(Ehdr) *)hdr;
+ return (len > sizeof(*e)) && VG_(memcmp)(&e->e_ident[0], ELFMAG, SELFMAG) == 0;
+}
+
+
+/* load_ELF pulls an ELF executable into the address space, prepares
+ it for execution, and writes info about it into INFO. In
+ particular it fills in .init_eip, which is the starting point.
+
+ Returns zero on success, non-zero (a VKI_E.. value) on failure.
+
+ The sequence of activities is roughly as follows:
+
+ - use readelf() to extract program header info from the exe file.
+
+ - scan the program header, collecting info (not sure what all those
+ info-> fields are, or whether they are used, but still) and in
+ particular looking out fo the PT_INTERP header, which describes
+ the interpreter. If such a field is found, the space needed to
+ hold the interpreter is computed into interp_size.
+
+ - map the executable in, by calling mapelf(). This maps in all
+ loadable sections, and I _think_ also creates any .bss areas
+ required. mapelf() returns the address just beyond the end of
+ the furthest-along mapping it creates. The executable is mapped
+ starting at EBASE, which is usually read from it (eg, 0x8048000
+ etc) except if it's a PIE, in which case I'm not sure what
+ happens.
+
+ The returned address is recorded in info->brkbase as the start
+ point of the brk (data) segment, as it is traditional to place
+ the data segment just after the executable. Neither load_ELF nor
+ mapelf creates the brk segment, though: that is for the caller of
+ load_ELF to attend to.
+
+ - If the initial phdr scan didn't find any mention of an
+ interpreter (interp == NULL), this must be a statically linked
+ executable, and we're pretty much done.
+
+ - Otherwise, we need to use mapelf() a second time to load the
+ interpreter. The interpreter can go anywhere, but mapelf() wants
+ to be told a specific address to put it at. So an advisory query
+ is passed to aspacem, asking where it would put an anonymous
+ client mapping of size INTERP_SIZE. That address is then used
+ as the mapping address for the interpreter.
+
+ - The entry point in INFO is set to the interpreter's entry point,
+ and we're done. */
+Int VG_(load_ELF)(Int fd, const HChar* name, /*MOD*/ExeInfo* info)
+{
+ SysRes sres;
+ struct elfinfo *e;
+ struct elfinfo *interp = NULL;
+ ESZ(Addr) minaddr = ~0; /* lowest mapped address */
+ ESZ(Addr) maxaddr = 0; /* highest mapped address */
+ ESZ(Addr) interp_addr = 0; /* interpreter (ld.so) address */
+ ESZ(Word) interp_size = 0; /* interpreter size */
+ ESZ(Word) interp_align = VKI_PAGE_SIZE;
+ Int i;
+ void *entry;
+ ESZ(Addr) ebase = 0;
+
+ /* The difference between where the interpreter got mapped and
+ where it asked to be mapped. Needed for computing the ppc64 ELF
+ entry point and initial tocptr (R2) value. */
+ ESZ(Word) interp_offset = 0;
+
+#ifdef HAVE_PIE
+ ebase = info->exe_base;
+#endif
+
+ e = readelf(fd, name);
+
+ if (e == NULL)
+ return VKI_ENOEXEC;
+
+ /* The kernel maps position-independent executables at TASK_SIZE*2/3;
+ duplicate this behavior as close as we can. */
+ if (e->e.e_type == ET_DYN && ebase == 0) {
+ ebase = VG_PGROUNDDN(info->exe_base
+ + (info->exe_end - info->exe_base) * 2 / 3);
+ /* We really don't want to load PIEs at zero or too close. It
+ works, but it's unrobust (NULL pointer reads and writes
+ become legit, which is really bad) and causes problems for
+ exp-ptrcheck, which assumes all numbers below 1MB are
+ nonpointers. So, hackily, move it above 1MB. */
+ /* Later .. is appears ppc32-linux tries to put [vdso] at 1MB,
+ which totally screws things up, because nothing else can go
+ there. So bump the hacky load addess along by 0x8000, to
+ 0x108000. */
+ if (ebase < 0x108000)
+ ebase = 0x108000;
+ }
+
+ info->phnum = e->e.e_phnum;
+ info->entry = e->e.e_entry + ebase;
+ info->phdr = 0;
+
+ for (i = 0; i < e->e.e_phnum; i++) {
+ ESZ(Phdr) *ph = &e->p[i];
+
+ switch(ph->p_type) {
+ case PT_PHDR:
+ info->phdr = ph->p_vaddr + ebase;
+ break;
+
+ case PT_LOAD:
+ if (ph->p_vaddr < minaddr)
+ minaddr = ph->p_vaddr;
+ if (ph->p_vaddr+ph->p_memsz > maxaddr)
+ maxaddr = ph->p_vaddr+ph->p_memsz;
+ break;
+
+ case PT_INTERP: {
+ HChar *buf = VG_(malloc)("ume.LE.1", ph->p_filesz+1);
+ Int j;
+ Int intfd;
+ Int baseaddr_set;
+
+ vg_assert(buf);
+ VG_(pread)(fd, buf, ph->p_filesz, ph->p_offset);
+ buf[ph->p_filesz] = '\0';
+
+ sres = VG_(open)(buf, VKI_O_RDONLY, 0);
+ if (sres.isError) {
+ VG_(printf)("valgrind: m_ume.c: can't open interpreter\n");
+ VG_(exit)(1);
+ }
+ intfd = sres.res;
+
+ interp = readelf(intfd, buf);
+ if (interp == NULL) {
+ VG_(printf)("valgrind: m_ume.c: can't read interpreter\n");
+ return 1;
+ }
+ VG_(free)(buf);
+
+ baseaddr_set = 0;
+ for (j = 0; j < interp->e.e_phnum; j++) {
+ ESZ(Phdr) *iph = &interp->p[j];
+ ESZ(Addr) end;
+
+ if (iph->p_type != PT_LOAD)
+ continue;
+
+ if (!baseaddr_set) {
+ interp_addr = iph->p_vaddr;
+ interp_align = iph->p_align;
+ baseaddr_set = 1;
+ }
+
+ /* assumes that all segments in the interp are close */
+ end = (iph->p_vaddr - interp_addr) + iph->p_memsz;
+
+ if (end > interp_size)
+ interp_size = end;
+ }
+ break;
+
+ default:
+ // do nothing
+ break;
+ }
+ }
+ }
+
+ if (info->phdr == 0)
+ info->phdr = minaddr + ebase + e->e.e_phoff;
+
+ if (info->exe_base != info->exe_end) {
+ if (minaddr >= maxaddr ||
+ (minaddr + ebase < info->exe_base ||
+ maxaddr + ebase > info->exe_end)) {
+ VG_(printf)("Executable range %p-%p is outside the\n"
+ "acceptable range %p-%p\n",
+ (char *)minaddr + ebase, (char *)maxaddr + ebase,
+ (char *)info->exe_base, (char *)info->exe_end);
+ return VKI_ENOMEM;
+ }
+ }
+
+ info->brkbase = mapelf(e, ebase); /* map the executable */
+
+ if (info->brkbase == 0)
+ return VKI_ENOMEM;
+
+ if (interp != NULL) {
+ /* reserve a chunk of address space for interpreter */
+ MapRequest mreq;
+ Addr advised;
+ Bool ok;
+
+ /* Don't actually reserve the space. Just get an advisory
+ indicating where it would be allocated, and pass that to
+ mapelf(), which in turn asks aspacem to do some fixed maps at
+ the specified address. This is a bit of hack, but it should
+ work because there should be no intervening transactions with
+ aspacem which could cause those fixed maps to fail.
+
+ Placement policy is:
+
+ if the interpreter asks to be loaded at zero
+ ignore that and put it wherever we like (mappings at zero
+ are bad news)
+ else
+ try and put it where it asks for, but if that doesn't work,
+ just put it anywhere.
+ */
+ if (interp_addr == 0) {
+ mreq.rkind = MAny;
+ mreq.start = 0;
+ mreq.len = interp_size;
+ } else {
+ mreq.rkind = MHint;
+ mreq.start = interp_addr;
+ mreq.len = interp_size;
+ }
+
+ advised = VG_(am_get_advisory)( &mreq, True/*client*/, &ok );
+
+ if (!ok) {
+ /* bomb out */
+ SysRes res = VG_(mk_SysRes_Error)(VKI_EINVAL);
+ if (0) VG_(printf)("reserve for interp: failed\n");
+ check_mmap(res, (Addr)interp_addr, interp_size);
+ /*NOTREACHED*/
+ }
+
+ (void)mapelf(interp, (ESZ(Addr))advised - interp_addr);
+
+ VG_(close)(interp->fd);
+
+ entry = (void *)(advised - interp_addr + interp->e.e_entry);
+ info->interp_base = (ESZ(Addr))advised;
+ interp_offset = advised - interp_addr;
+
+ VG_(free)(interp->p);
+ VG_(free)(interp);
+ } else
+ entry = (void *)(ebase + e->e.e_entry);
+
+ info->exe_base = minaddr + ebase;
+ info->exe_end = maxaddr + ebase;
+
+#if defined(VGP_ppc64_linux)
+ /* On PPC64, a func ptr is represented by a TOC entry ptr. This
+ TOC entry contains three words; the first word is the function
+ address, the second word is the TOC ptr (r2), and the third word
+ is the static chain value. */
+ info->init_ip = ((ULong*)entry)[0];
+ info->init_toc = ((ULong*)entry)[1];
+ info->init_ip += interp_offset;
+ info->init_toc += interp_offset;
+#else
+ info->init_ip = (Addr)entry;
+ info->init_toc = 0; /* meaningless on this platform */
+#endif
+ VG_(free)(e->p);
+ VG_(free)(e);
+
+ return 0;
+}
+
+#endif /* defined(HAVE_ELF) */
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
diff --git a/coregrind/m_ume/main.c b/coregrind/m_ume/main.c
new file mode 100644
index 0000000..786e176
--- /dev/null
+++ b/coregrind/m_ume/main.c
@@ -0,0 +1,286 @@
+
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve(), and other stuff shared between stage1 ---*/
+/*--- and stage2. m_ume.c ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2000-2009 Julian Seward
+ jseward@acm.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.
+*/
+
+
+#include "pub_core_basics.h"
+#include "pub_core_vki.h"
+
+#include "pub_core_libcbase.h"
+#include "pub_core_libcassert.h" // VG_(exit), vg_assert
+#include "pub_core_libcfile.h" // VG_(close) et al
+#include "pub_core_libcprint.h" // VG_(message)
+#include "pub_core_mallocfree.h" // VG_(strdup)
+#include "pub_core_syscall.h" // VG_(mk_SysRes_Error)
+#include "pub_core_options.h" // VG_(clo_xml)
+#include "pub_core_ume.h" // self
+
+#include "priv_ume.h"
+
+
+typedef struct {
+ const HChar *name;
+ Bool (*match_fn)(Char *hdr, Int len);
+ Int (*load_fn)(Int fd, const HChar *name, ExeInfo *info);
+} ExeHandler;
+
+static ExeHandler exe_handlers[] = {
+#if defined(HAVE_ELF)
+ { "ELF", VG_(match_ELF), VG_(load_ELF) },
+#endif
+#if defined(HAVE_SCRIPT)
+ { "script", VG_(match_script), VG_(load_script) },
+#endif
+};
+#define EXE_HANDLER_COUNT (sizeof(exe_handlers)/sizeof(exe_handlers[0]))
+
+
+// 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 (res.isError) {
+ return res;
+ }
+ fd = 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 (res.isError || res.res != bufsz) {
+ VG_(close)(fd);
+ return VG_(mk_SysRes_Error)(VKI_EACCES);
+ }
+ bufsz = 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 (!res.isError && out_fd) {
+ *out_fd = fd;
+ } else {
+ VG_(close)(fd);
+ }
+
+ return res;
+}
+
+// returns: 0 = success, non-0 is failure
+//
+// We can execute only binaries (ELF, etc) or scripts that begin with "#!".
+// (Not, for example, scripts that don't begin with "#!"; see the
+// VG_(do_exec)() invocation from m_main.c for how that's handled.)
+Int VG_(do_exec_inner)(const HChar* exe, ExeInfo* info)
+{
+ SysRes res;
+ Int fd;
+ Int ret;
+
+ res = VG_(pre_exec_check)(exe, &fd, False/*allow_setuid*/);
+ if (res.isError)
+ return res.err;
+
+ vg_assert2(res.res >= 0 && res.res < EXE_HANDLER_COUNT,
+ "invalid VG_(pre_exec_check) result");
+
+ ret = (*exe_handlers[res.res].load_fn)(fd, exe, info);
+
+ VG_(close)(fd);
+
+ return ret;
+}
+
+
+static Bool is_hash_bang_file(Char* f)
+{
+ SysRes res = VG_(open)(f, VKI_O_RDONLY, 0);
+ if (!res.isError) {
+ Char buf[3] = {0,0,0};
+ Int fd = res.res;
+ Int n = VG_(read)(fd, buf, 2);
+ if (n == 2 && VG_STREQ("#!", buf))
+ return True;
+ }
+ return False;
+}
+
+// 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 (!res.isError) {
+ UChar buf[80];
+ Int fd = 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
+ }
+}
+
+// If the do_exec fails we try to emulate what the shell does (I used
+// bash as a guide). It's worth noting that the shell can execute some
+// things that VG_(do_exec)() (which subsitutes for the kernel's exec())
+// will refuse to (eg. scripts lacking a "#!" prefix).
+static Int do_exec_shell_followup(Int ret, HChar* exe_name, ExeInfo* info)
+{
+ Char* default_interp_name = "/bin/sh";
+ SysRes res;
+ struct vg_stat st;
+
+ if (VKI_ENOEXEC == ret) {
+ // It was an executable file, but in an unacceptable format. Probably
+ // is a shell script lacking the "#!" prefix; try to execute it so.
+
+ // Is it a binary file?
+ if (is_binary_file(exe_name)) {
+ VG_(printf)("valgrind: %s: cannot execute binary file\n", exe_name);
+ VG_(exit)(126); // 126 == NOEXEC
+ }
+
+ // Looks like a script. Run it with /bin/sh. This includes
+ // zero-length files.
+
+ info->interp_name = VG_(strdup)("ume.desf.1", default_interp_name);
+ info->interp_args = NULL;
+ if (info->argv && info->argv[0] != NULL)
+ info->argv[0] = (char *)exe_name;
+
+ ret = VG_(do_exec_inner)(info->interp_name, info);
+
+ if (0 != ret) {
+ // Something went wrong with executing the default interpreter
+ VG_(printf)("valgrind: %s: bad interpreter (%s): %s\n",
+ exe_name, info->interp_name, VG_(strerror)(ret));
+ VG_(exit)(126); // 126 == NOEXEC
+ }
+
+ } else if (0 != ret) {
+ // Something else went wrong. Try to make the error more specific,
+ // and then print a message and abort.
+
+ // Was it a directory?
+ res = VG_(stat)(exe_name, &st);
+ if (!res.isError && VKI_S_ISDIR(st.st_mode)) {
+ VG_(printf)("valgrind: %s: is a directory\n", exe_name);
+
+ // Was it not executable?
+ } else if (0 != VG_(check_executable)(NULL, exe_name,
+ False/*allow_setuid*/)) {
+ VG_(printf)("valgrind: %s: %s\n", exe_name, VG_(strerror)(ret));
+
+ // Did it start with "#!"? If so, it must have been a bad interpreter.
+ } else if (is_hash_bang_file(exe_name)) {
+ VG_(printf)("valgrind: %s: bad interpreter: %s\n",
+ exe_name, VG_(strerror)(ret));
+
+ // Otherwise it was something else.
+ } else {
+ VG_(printf)("valgrind: %s: %s\n", exe_name, VG_(strerror)(ret));
+ }
+ // 126 means NOEXEC; I think this is Posix, and that in some cases we
+ // should be returning 127, meaning NOTFOUND. Oh well.
+ VG_(exit)(126);
+ }
+ return ret;
+}
+
+
+// This emulates the kernel's exec(). If it fails, it then emulates the
+// shell's handling of the situation.
+// See ume.h for an indication of which entries of 'info' are inputs, which
+// are outputs, and which are both.
+/* returns: 0 = success, non-0 is failure */
+Int VG_(do_exec)(const HChar* exe_name, ExeInfo* info)
+{
+ Int ret;
+
+ info->interp_name = NULL;
+ info->interp_args = NULL;
+
+ ret = VG_(do_exec_inner)(exe_name, info);
+
+ if (0 != ret) {
+ Char* exe_name_casted = (Char*)exe_name;
+ ret = do_exec_shell_followup(ret, exe_name_casted, info);
+ }
+ return ret;
+}
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
diff --git a/coregrind/m_ume/priv_ume.h b/coregrind/m_ume/priv_ume.h
new file mode 100644
index 0000000..2ac4189
--- /dev/null
+++ b/coregrind/m_ume/priv_ume.h
@@ -0,0 +1,61 @@
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve(). priv_ume.h ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2000-2005 Julian Seward
+ jseward@acm.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.
+*/
+
+#ifndef __PRIV_UME_H
+#define __PRIV_UME_H
+
+#if defined(VGO_linux)
+# define HAVE_ELF
+# define HAVE_SCRIPT
+
+#elif defined(VGO_aix5)
+// The AIX port doesn't use UME.
+
+#else
+#error unknown architecture
+#endif
+
+extern int VG_(do_exec_inner)(const HChar *exe, ExeInfo *info);
+
+#if defined(HAVE_ELF)
+extern Bool VG_(match_ELF) ( Char *hdr, Int len );
+extern Int VG_(load_ELF) ( Int fd, const HChar *name, ExeInfo *info );
+#endif
+
+#if defined(HAVE_SCRIPT)
+extern Bool VG_(match_script) ( Char *hdr, Int len );
+extern Int VG_(load_script) ( Int fd, const HChar *name, ExeInfo *info );
+#endif
+
+#endif /* __PRIV_UME_H */
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
+
diff --git a/coregrind/m_ume/script.c b/coregrind/m_ume/script.c
new file mode 100644
index 0000000..8df563e
--- /dev/null
+++ b/coregrind/m_ume/script.c
@@ -0,0 +1,150 @@
+
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve() for #! scripts. m_ume_script.c ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2000-2009 Julian Seward
+ jseward@acm.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.
+*/
+
+#include "pub_core_basics.h"
+#include "pub_core_vki.h"
+
+#include "pub_core_libcbase.h"
+#include "pub_core_libcassert.h" // VG_(exit), vg_assert
+#include "pub_core_libcfile.h" // VG_(close) et al
+#include "pub_core_libcprint.h"
+#include "pub_core_mallocfree.h" // VG_(strdup)
+#include "pub_core_ume.h" // self
+
+#include "priv_ume.h" // self
+
+
+#if defined(HAVE_SCRIPT)
+
+Bool VG_(match_script)(Char *hdr, Int len)
+{
+ Char* end = hdr + len;
+ Char* interp = hdr + 2;
+
+ // len < 4: need '#', '!', plus at least a '/' and one more char
+ if (len < 4) return False;
+ if (0 != VG_(memcmp)(hdr, "#!", 2)) return False;
+
+ // Find interpreter name, make sure it's an absolute path (starts with
+ // '/') and has at least one more char. First, skip over any space
+ // between the #! and the start of the interpreter name
+ while (interp < end && VG_(isspace)(*interp)) interp++;
+
+ // overrun?
+ if (interp >= end) return False; // can't find start of interp name
+
+ // interp should now point at the /
+ if (*interp != '/') return False; // absolute path only for interpreter
+
+ // check for something plausible after the /
+ interp++;
+ if (interp >= end) return False;
+ if (VG_(isspace)(*interp)) return False;
+
+ // Here we should get the full interpreter name and check it with
+ // check_executable(). See the "EXEC FAILED" failure when running shell
+ // for an example.
+
+ return True; // looks like a #! script
+}
+
+
+/* returns: 0 = success, non-0 is failure */
+Int VG_(load_script)(Int fd, const HChar* name, ExeInfo* info)
+{
+ Char hdr[4096];
+ Int len = 4096;
+ Int eol;
+ Char* interp;
+ Char* end;
+ Char* cp;
+ Char* arg = NULL;
+ SysRes res;
+
+ // Read the first part of the file.
+ res = VG_(pread)(fd, hdr, len, 0);
+ if (res.isError) {
+ VG_(close)(fd);
+ return VKI_EACCES;
+ } else {
+ len = res.res;
+ }
+
+ vg_assert('#' == hdr[0] && '!' == hdr[1]);
+
+ end = hdr + len;
+ interp = hdr + 2;
+ while (interp < end && VG_(isspace)(*interp))
+ interp++;
+
+ vg_assert(*interp == '/'); /* absolute path only for interpreter */
+
+ /* 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';
+ }
+
+ 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] = (char *)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);
+}
+
+#endif /* defined(HAVE_SCRIPT) */
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
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