diff options
| -rw-r--r-- | ChangeLog | 12 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/i386/init-first.c | 25 |
2 files changed, 26 insertions, 11 deletions
@@ -1,3 +1,15 @@ +2005-10-16 Roland McGrath <roland@frob.com> + + [BZ #1253] + * sysdeps/mach/hurd/i386/init-first.c (init): Make cast kosher. + (_hurd_stack_setup): Don't declare with arguments and ellipsis. + Use __builtin_frame_address and __builtin_return_address. + (_dl_init_first): Likewise. + + * sysdeps/mach/hurd/i386/init-first.c (_cthread_init_routine): Declare + as weak extern. + (init): Check for it being undefined. + 2005-10-16 Daniel Jacobowitz <dan@codesourcery.com> Roland McGrath <roland@redhat.com> diff --git a/sysdeps/mach/hurd/i386/init-first.c b/sysdeps/mach/hurd/i386/init-first.c index caa2320..f9a7a58 100644 --- a/sysdeps/mach/hurd/i386/init-first.c +++ b/sysdeps/mach/hurd/i386/init-first.c @@ -1,5 +1,6 @@ /* Initialization code run first thing by the ELF startup code. For i386/Hurd. - Copyright (C) 1995,96,97,98,99,2000,01,02,03,04 Free Software Foundation, Inc. + Copyright (C) 1995,96,97,98,99,2000,01,02,03,04,05 + 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 @@ -54,7 +55,7 @@ extern int __libc_argc attribute_hidden; extern char **__libc_argv attribute_hidden; extern char **_dl_argv; -void *(*_cthread_init_routine) (void); /* Returns new SP to use. */ +extern void *(*_cthread_init_routine) (void) __attribute__ ((weak)); void (*_cthread_exit_routine) (int status) __attribute__ ((__noreturn__)); /* Things that want to be run before _hurd_init or much anything else. @@ -203,7 +204,7 @@ init (int *data) code as the return address, and the argument data immediately above that on the stack. */ - if (_cthread_init_routine) + if (&_cthread_init_routine && _cthread_init_routine) { /* Initialize cthreads, which will allocate us a new stack to run on. */ int *newsp = (*_cthread_init_routine) (); @@ -271,7 +272,7 @@ init (int *data) /* The argument data is just above the stack frame we will unwind by returning. Mutate our own return address to run the code below. */ usercode = data[-1]; - ((void **) data)[-1] = call_init1; + data[-1] = (int) &call_init1; /* Force USERCODE into %eax and &init1 into %ecx, which are not restored by function return. */ asm volatile ("# a %0 c %1" : : "a" (usercode), "c" (&init1)); @@ -319,11 +320,11 @@ first_init (void) stack set up just as the user will see it, so it can switch stacks. */ void -_dl_init_first (int argc, ...) +_dl_init_first (void) { first_init (); - init (&argc); + init ((int *) __builtin_frame_address (0) + 2); } #endif @@ -350,21 +351,23 @@ strong_alias (posixland_init, __libc_init_first); This poorly-named function is called by static-start.S, which should not exist at all. */ void -_hurd_stack_setup (volatile int argc, ...) +_hurd_stack_setup (void) { + intptr_t caller = (intptr_t) __builtin_return_address (0); + void doinit (intptr_t *data) { /* This function gets called with the argument data at TOS. */ - void doinit1 (volatile int argc, ...) + void doinit1 (void) { - init ((int *) &argc); + init ((int *) __builtin_frame_address (0) + 2); } /* Push the user return address after the argument data, and then jump to `doinit1' (above), so it is as if __libc_init_first's caller had called `doinit1' with the argument data already on the stack. */ - *--data = (&argc)[-1]; + *--data = caller; asm volatile ("movl %0, %%esp\n" /* Switch to new outermost stack. */ "movl $0, %%ebp\n" /* Clear outermost frame pointer. */ "jmp *%1" : : "r" (data), "r" (&doinit1) : "sp"); @@ -373,7 +376,7 @@ _hurd_stack_setup (volatile int argc, ...) first_init (); - _hurd_startup ((void **) &argc, &doinit); + _hurd_startup ((void **) __builtin_frame_address (0) + 2, &doinit); } #endif |