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* sysdeps/powerpc/bp-asm.h (DISCARD_BOUNDS): Rename from UNCHECK_BOUNDS.

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* sysdeps/powerpc/bits/setjmp.h (JB_SIZE): New constant. 
* sysdeps/powerpc/elf/libc-start.c (__libc_start_main): 
Wrap bounds around argv & envp and each of their string members. 
* sysdeps/powerpc/elf/start.S: Designate BP symbols. 
* sysdeps/unix/sysv/linux/powerpc/brk.S: Wrap entry-point 
symbol in BP_SYM ().  Discard bounds of address arg. 
* sysdeps/unix/sysv/linux/powerpc/clone.S: Likewise. 
* sysdeps/unix/sysv/linux/powerpc/mmap64.c (__mmap64): 
Discard bounds on address arg, add bounds to return value.
2000-07-21  Greg McGary  <greg@mcgary.org>

	* sysdeps/powerpc/bp-asm.h (DISCARD_BOUNDS): Rename from UNCHECK_BOUNDS.
	* sysdeps/powerpc/bits/setjmp.h (JB_SIZE): New constant.
	* sysdeps/powerpc/elf/libc-start.c (__libc_start_main):
	Wrap bounds around argv & envp and each of their string members.
	* sysdeps/powerpc/elf/start.S: Designate BP symbols.
	* sysdeps/unix/sysv/linux/powerpc/brk.S: Wrap entry-point
	symbol in BP_SYM ().  Discard bounds of address arg.
	* sysdeps/unix/sysv/linux/powerpc/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/mmap64.c (__mmap64):
	Discard bounds on address arg, add bounds to return value.
This commit is contained in:
Greg McGary
2000-07-21 07:43:25 +00:00
parent 137bca87e7
commit df0f2bf8cc
8 changed files with 75 additions and 35 deletions
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38
sysdeps/powerpc/elf/libc-start.c
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@ -19,6 +19,8 @@
#include <stdlib.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <bp-start.h>
#include <bp-sym.h>
extern void __libc_init_first (int argc, char **argv, char **envp);
@ -29,18 +31,27 @@ extern void *__libc_stack_end;
struct startup_info
{
void *sda_base;
void *__unbounded sda_base;
int (*main) (int, char **, char **, void *);
int (*init) (int, char **, char **, void *);
void (*fini) (void);
};
int
__libc_start_main (int argc, char **argv, char **envp,
void *auxvec, void (*rtld_fini) (void),
struct startup_info *stinfo,
char **stack_on_entry)
/* GKM FIXME: GCC: this should get __BP_ prefix by virtue of the
BPs in the arglist of startup_info.main and startup_info.init. */
BP_SYM (__libc_start_main) (int argc, char *__unbounded *__unbounded ubp_av,
char *__unbounded *__unbounded ubp_ev,
void *__unbounded auxvec, void (*rtld_fini) (void),
struct startup_info *__unbounded stinfo,
char *__unbounded *__unbounded stack_on_entry)
{
#if __BOUNDED_POINTERS__
char **argv;
#else
# define argv ubp_av
#endif
#ifndef SHARED
/* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
If the address would be taken inside the expression the optimizer
@ -58,23 +69,22 @@ __libc_start_main (int argc, char **argv, char **envp,
/* ...in which case, we have argc as the top thing on the
stack, followed by argv (NULL-terminated), envp (likewise),
and the auxilary vector. */
argc = *(int *) stack_on_entry;
argv = stack_on_entry + 1;
envp = argv + argc + 1;
auxvec = envp;
while (*(char **) auxvec != NULL)
argc = *(int *__unbounded) stack_on_entry;
ubp_av = stack_on_entry + 1;
ubp_ev = ubp_av + argc + 1;
auxvec = ubp_ev;
while (*(char *__unbounded *__unbounded) auxvec != NULL)
++auxvec;
++auxvec;
rtld_fini = NULL;
}
INIT_ARGV_and_ENVIRON;
/* Store something that has some relationship to the end of the
stack, for backtraces. This variable should be thread-specific. */
__libc_stack_end = stack_on_entry + 4;
/* Set the global _environ variable correctly. */
__environ = envp;
/* Register the destructor of the dynamic linker if there is any. */
if (rtld_fini != NULL)
atexit (rtld_fini);
@ -84,7 +94,7 @@ __libc_start_main (int argc, char **argv, char **envp,
if (_dl_debug_impcalls)
_dl_debug_message (1, "\ninitialize libc\n\n", NULL);
#endif
__libc_init_first (argc, argv, envp);
__libc_init_first (argc, argv, __environ);
/* Register the destructor of the program, if any. */
if (stinfo->fini)