-/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
+/* Copyright (C) 2011-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
#define EW_(e, w, t) EW__(e, w, _##t)
#define EW__(e, w, t) e##w##t
-#define pldd_assert(name, exp) \
- typedef int __assert_##name[((exp) != 0) - 1]
-
-
struct E(link_map)
{
EW(Addr) l_addr;
EW(Addr) l_libname;
};
#if CLASS == __ELF_NATIVE_CLASS
-pldd_assert (l_addr, (offsetof (struct link_map, l_addr)
- == offsetof (struct E(link_map), l_addr)));
-pldd_assert (l_name, (offsetof (struct link_map, l_name)
- == offsetof (struct E(link_map), l_name)));
-pldd_assert (l_next, (offsetof (struct link_map, l_next)
- == offsetof (struct E(link_map), l_next)));
+_Static_assert (offsetof (struct link_map, l_addr)
+ == offsetof (struct E(link_map), l_addr), "l_addr");
+_Static_assert (offsetof (struct link_map, l_name)
+ == offsetof (struct E(link_map), l_name), "l_name");
+_Static_assert (offsetof (struct link_map, l_next)
+ == offsetof (struct E(link_map), l_next), "l_next");
#endif
EW(Addr) next;
};
#if CLASS == __ELF_NATIVE_CLASS
-pldd_assert (name, (offsetof (struct libname_list, name)
- == offsetof (struct E(libname_list), name)));
-pldd_assert (next, (offsetof (struct libname_list, next)
- == offsetof (struct E(libname_list), next)));
+_Static_assert (offsetof (struct libname_list, name)
+ == offsetof (struct E(libname_list), name), "name");
+_Static_assert (offsetof (struct libname_list, next)
+ == offsetof (struct E(libname_list), next), "next");
#endif
struct E(r_debug)
EW(Addr) r_map;
};
#if CLASS == __ELF_NATIVE_CLASS
-pldd_assert (r_version, (offsetof (struct r_debug, r_version)
- == offsetof (struct E(r_debug), r_version)));
-pldd_assert (r_map, (offsetof (struct r_debug, r_map)
- == offsetof (struct E(r_debug), r_map)));
+_Static_assert (offsetof (struct r_debug, r_version)
+ == offsetof (struct E(r_debug), r_version), "r_version");
+_Static_assert (offsetof (struct r_debug, r_map)
+ == offsetof (struct E(r_debug), r_map), "r_map");
#endif
static int
-E(find_maps) (pid_t pid, void *auxv, size_t auxv_size)
+E(find_maps) (const char *exe, int memfd, pid_t pid, void *auxv,
+ size_t auxv_size)
{
EW(Addr) phdr = 0;
unsigned int phnum = 0;
if (phdr == 0 || phnum == 0 || phent == 0)
error (EXIT_FAILURE, 0, gettext ("cannot find program header of process"));
- EW(Phdr) *p = alloca (phnum * phent);
- if (pread64 (memfd, p, phnum * phent, phdr) != phnum * phent)
- {
- error (0, 0, gettext ("cannot read program header"));
- return EXIT_FAILURE;
- }
+ EW(Phdr) *p = xmalloc (phnum * phent);
+ if (pread (memfd, p, phnum * phent, phdr) != phnum * phent)
+ error (EXIT_FAILURE, 0, gettext ("cannot read program header"));
/* Determine the load offset. We need this for interpreting the
other program header entries so we do this in a separate loop.
if (p[i].p_type == PT_DYNAMIC)
{
EW(Dyn) *dyn = xmalloc (p[i].p_filesz);
- if (pread64 (memfd, dyn, p[i].p_filesz, offset + p[i].p_vaddr)
+ if (pread (memfd, dyn, p[i].p_filesz, offset + p[i].p_vaddr)
!= p[i].p_filesz)
- {
- error (0, 0, gettext ("cannot read dynamic section"));
- return EXIT_FAILURE;
- }
+ error (EXIT_FAILURE, 0, gettext ("cannot read dynamic section"));
/* Search for the DT_DEBUG entry. */
for (unsigned int j = 0; j < p[i].p_filesz / sizeof (EW(Dyn)); ++j)
if (dyn[j].d_tag == DT_DEBUG && dyn[j].d_un.d_ptr != 0)
{
struct E(r_debug) r;
- if (pread64 (memfd, &r, sizeof (r), dyn[j].d_un.d_ptr)
+ if (pread (memfd, &r, sizeof (r), dyn[j].d_un.d_ptr)
!= sizeof (r))
- {
- error (0, 0, gettext ("cannot read r_debug"));
- return EXIT_FAILURE;
- }
+ error (EXIT_FAILURE, 0, gettext ("cannot read r_debug"));
if (r.r_map != 0)
{
}
else if (p[i].p_type == PT_INTERP)
{
- interp = alloca (p[i].p_filesz);
- if (pread64 (memfd, interp, p[i].p_filesz, offset + p[i].p_vaddr)
+ interp = xmalloc (p[i].p_filesz);
+ if (pread (memfd, interp, p[i].p_filesz, offset + p[i].p_vaddr)
!= p[i].p_filesz)
- {
- error (0, 0, gettext ("cannot read program interpreter"));
- return EXIT_FAILURE;
- }
+ error (EXIT_FAILURE, 0, gettext ("cannot read program interpreter"));
}
if (list == 0)
if (interp == NULL)
{
// XXX check whether the executable itself is the loader
- return EXIT_FAILURE;
+ exit (EXIT_FAILURE);
}
// XXX perhaps try finding ld.so and _r_debug in it
-
- return EXIT_FAILURE;
+ exit (EXIT_FAILURE);
}
+ free (p);
+ free (interp);
+
/* Print the PID and program name first. */
printf ("%lu:\t%s\n", (unsigned long int) pid, exe);
/* Iterate over the list of objects and print the information. */
- size_t strsize = 256;
- char *str = alloca (strsize);
+ struct scratch_buffer tmpbuf;
+ scratch_buffer_init (&tmpbuf);
+ int status = 0;
do
{
struct E(link_map) m;
- if (pread64 (memfd, &m, sizeof (m), list) != sizeof (m))
- {
- error (0, 0, gettext ("cannot read link map"));
- return EXIT_FAILURE;
- }
+ if (pread (memfd, &m, sizeof (m), list) != sizeof (m))
+ error (EXIT_FAILURE, 0, gettext ("cannot read link map"));
EW(Addr) name_offset = m.l_name;
- again:
while (1)
{
- ssize_t n = pread64 (memfd, str, strsize, name_offset);
+ ssize_t n = pread (memfd, tmpbuf.data, tmpbuf.length, name_offset);
if (n == -1)
- {
- error (0, 0, gettext ("cannot read object name"));
- return EXIT_FAILURE;
- }
+ error (EXIT_FAILURE, 0, gettext ("cannot read object name"));
- if (memchr (str, '\0', n) != NULL)
+ if (memchr (tmpbuf.data, '\0', n) != NULL)
break;
- str = extend_alloca (str, strsize, strsize * 2);
+ if (!scratch_buffer_grow (&tmpbuf))
+ error (EXIT_FAILURE, 0,
+ gettext ("cannot allocate buffer for object name"));
}
- if (str[0] == '\0' && name_offset == m.l_name
- && m.l_libname != 0)
- {
- /* Try the l_libname element. */
- struct E(libname_list) ln;
- if (pread64 (memfd, &ln, sizeof (ln), m.l_libname) == sizeof (ln))
- {
- name_offset = ln.name;
- goto again;
- }
- }
+ /* The m.l_name and m.l_libname.name for loader linkmap points to same
+ values (since BZ#387 fix). Trying to use l_libname name as the
+ shared object name might lead to an infinite loop (BZ#18035). */
/* Skip over the executable. */
- if (str[0] != '\0')
- printf ("%s\n", str);
+ if (((char *)tmpbuf.data)[0] != '\0')
+ printf ("%s\n", (char *)tmpbuf.data);
list = m.l_next;
}
while (list != 0);
- return 0;
+ scratch_buffer_free (&tmpbuf);
+ return status;
}
projects / thirdparty / glibc.git / blobdiff