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authorUlrich Drepper <drepper@redhat.com>2004-01-13 15:47:32 +0000
committerUlrich Drepper <drepper@redhat.com>2004-01-13 15:47:32 +0000
commitd1fc817ea459ca28979948fbb23ff58a6f3f4a8c (patch)
treecf1b48823190c07959f8b8b769d096fcd739b2f3
parent0a182a286d84451b70a40948247319ac9723decb (diff)
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Update.
2004-01-13 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/dl-execstack.c: Change interface. Add challenge for caller. * sysdeps/generic/ldsodefs.h: Change declaration and type of hook member in rtld_global appropriately. * elf/dl-support.c: Likewise. * elf/dl-load.c (_dl_map_object_from_fd): Take additional paramter. Pass it on to the changed function. (_dl_map_object): Pass new parameter to _dl_map_object_from_fd.
-rw-r--r--ChangeLog11
-rw-r--r--elf/dl-load.c9
-rw-r--r--elf/dl-support.c4
-rw-r--r--nptl/ChangeLog18
-rw-r--r--nptl/allocatestack.c12
-rw-r--r--nptl/pthreadP.h5
-rw-r--r--sysdeps/generic/ldsodefs.h6
7 files changed, 46 insertions, 19 deletions
diff --git a/ChangeLog b/ChangeLog
index a423abf..e6c4684 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2004-01-13 Ulrich Drepper <drepper@redhat.com>
+
+ * sysdeps/unix/sysv/linux/dl-execstack.c: Change interface. Add
+ challenge for caller.
+ * sysdeps/generic/ldsodefs.h: Change declaration and type of hook
+ member in rtld_global appropriately.
+ * elf/dl-support.c: Likewise.
+ * elf/dl-load.c (_dl_map_object_from_fd): Take additional paramter.
+ Pass it on to the changed function.
+ (_dl_map_object): Pass new parameter to _dl_map_object_from_fd.
+
2004-01-13 Richard Henderson <rth@redhat.com>
* sysdeps/alpha/bits/atomic.h (__arch_compare_and_exchange_xxx_8_int):
diff --git a/elf/dl-load.c b/elf/dl-load.c
index dc993a5..99ca6a0 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -811,7 +811,7 @@ static
struct link_map *
_dl_map_object_from_fd (const char *name, int fd, struct filebuf *fbp,
char *realname, struct link_map *loader, int l_type,
- int mode)
+ int mode, void **stack_endp)
{
struct link_map *l = NULL;
const ElfW(Ehdr) *header;
@@ -1351,7 +1351,7 @@ cannot allocate TLS data structures for initial thread");
{
/* The stack is presently not executable, but this module
requires that it be executable. */
- errval = (*GL(dl_make_stack_executable_hook)) ();
+ errval = (*GL(dl_make_stack_executable_hook)) (stack_endp);
if (errval)
{
errstring = N_("\
@@ -1949,7 +1949,10 @@ cannot create shared object descriptor"));
N_("cannot open shared object file"));
}
- return _dl_map_object_from_fd (name, fd, &fb, realname, loader, type, mode);
+ extern void *__libc_stack_end;
+ void *stack_end = __libc_stack_end;
+ return _dl_map_object_from_fd (name, fd, &fb, realname, loader, type, mode,
+ &stack_end);
}
INTDEF (_dl_map_object)
diff --git a/elf/dl-support.c b/elf/dl-support.c
index f13fd05..aa255b4 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -1,5 +1,5 @@
/* Support for dynamic linking code in static libc.
- Copyright (C) 1996-2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1996-2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -136,7 +136,7 @@ ElfW(Word) _dl_stack_flags = PF_R|PF_W|PF_X;
/* If loading a shared object requires that we make the stack executable
when it was not, we do it by calling this function.
It returns an errno code or zero on success. */
-int (*_dl_make_stack_executable_hook) (void) internal_function
+int (*_dl_make_stack_executable_hook) (void **) internal_function
= _dl_make_stack_executable;
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index d80d531..28588b8 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,12 +1,18 @@
+2004-01-13 Ulrich Drepper <drepper@redhat.com>
+
+ * allocatestack.c (__make_stacks_executable): Change interface.
+ Check parameters. Pass parameter on to libc counterpart.
+ * pthreadP.h: Change declaration.
+
2004-01-13 Richard Henderson <rth@redhat.com>
- * sysdeps/alpha/Makefile: New file.
- * sysdeps/alpha/tcb-offsets.sym: New file.
- * sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h (SINGLE_THREAD_P):
- Use MULTIPLE_THREADS_OFFSET to implement !libpthread !libc version.
+ * sysdeps/alpha/Makefile: New file.
+ * sysdeps/alpha/tcb-offsets.sym: New file.
+ * sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h (SINGLE_THREAD_P):
+ Use MULTIPLE_THREADS_OFFSET to implement !libpthread !libc version.
- * sysdeps/unix/sysv/linux/alpha/lowlevellock.h: Rewrite based
- on powerpc version.
+ * sysdeps/unix/sysv/linux/alpha/lowlevellock.h: Rewrite based
+ on powerpc version.
2004-01-08 Jakub Jelinek <jakub@redhat.com>
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
index 343dd68..02de7f0 100644
--- a/nptl/allocatestack.c
+++ b/nptl/allocatestack.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -661,10 +661,16 @@ __deallocate_stack (struct pthread *pd)
}
+extern void *__libc_stack_end;
+
int
internal_function
-__make_stacks_executable (void)
+__make_stacks_executable (void **stack_endp)
{
+ /* Challenge the caller. */
+ if (*stack_endp != __libc_stack_end)
+ return EPERM;
+
#ifdef NEED_SEPARATE_REGISTER_STACK
const size_t pagemask = ~(__getpagesize () - 1);
#endif
@@ -702,7 +708,7 @@ __make_stacks_executable (void)
lll_unlock (stack_cache_lock);
if (err == 0)
- err = _dl_make_stack_executable ();
+ err = _dl_make_stack_executable (stack_endp);
return err;
}
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 1bfcf35..b051e3b 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -216,7 +216,8 @@ extern void __deallocate_stack (struct pthread *pd)
extern void __reclaim_stacks (void) attribute_hidden;
/* Make all threads's stacks executable. */
-int __make_stacks_executable (void) internal_function attribute_hidden;
+extern int __make_stacks_executable (void **stack_endp)
+ internal_function attribute_hidden;
/* longjmp handling. */
extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 627ed18..852cf51 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -1,5 +1,5 @@
/* Run-time dynamic linker data structures for loaded ELF shared objects.
- Copyright (C) 1995-2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1995-2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -366,7 +366,7 @@ struct rtld_global
/* If loading a shared object requires that we make the stack executable
when it was not, we do it by calling this function.
It returns an errno code or zero on success. */
- EXTERN int (*_dl_make_stack_executable_hook) (void) internal_function;
+ EXTERN int (*_dl_make_stack_executable_hook) (void **) internal_function;
/* Keep the conditional TLS members at the end so the layout of the
structure used by !USE_TLS code matches the prefix of the layout in
@@ -453,7 +453,7 @@ extern void **_dl_initial_error_catch_tsd (void) __attribute__ ((const))
/* This is the initial value of GL(dl_make_stack_executable_hook).
A threads library can change it. */
-extern int _dl_make_stack_executable (void) internal_function;
+extern int _dl_make_stack_executable (void **stack_endp) internal_function;
rtld_hidden_proto (_dl_make_stack_executable)
/* Parameters passed to the dynamic linker. */