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authorGreg McGary <greg@mcgary.org>2000-07-21 07:43:25 +0000
committerGreg McGary <greg@mcgary.org>2000-07-21 07:43:25 +0000
commitdf0f2bf8cccb0d1c4fc829eac281ae8f0ecef734 (patch)
tree87acdf8e6dc9683089c6e79467adea259d105f9d /sysdeps/powerpc
parent137bca87e71138610a5b57e64b5e2619d6889853 (diff)
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* 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. 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.
Diffstat (limited to 'sysdeps/powerpc')
-rw-r--r--sysdeps/powerpc/bits/setjmp.h3
-rw-r--r--sysdeps/powerpc/bp-asm.h4
-rw-r--r--sysdeps/powerpc/elf/libc-start.c38
-rw-r--r--sysdeps/powerpc/elf/start.S7
4 files changed, 32 insertions, 20 deletions
diff --git a/sysdeps/powerpc/bits/setjmp.h b/sysdeps/powerpc/bits/setjmp.h
index 040a244..da3f437 100644
--- a/sysdeps/powerpc/bits/setjmp.h
+++ b/sysdeps/powerpc/bits/setjmp.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 2000 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
@@ -34,6 +34,7 @@
# define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18 in total */
# define JB_CR 21 /* Condition code registers. */
# define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total */
+# define JB_SIZE (58*4)
#endif
#ifndef _ASM
diff --git a/sysdeps/powerpc/bp-asm.h b/sysdeps/powerpc/bp-asm.h
index e7a3640..5ae4d77 100644
--- a/sysdeps/powerpc/bp-asm.h
+++ b/sysdeps/powerpc/bp-asm.h
@@ -30,7 +30,7 @@
/* Don't check bounds, just convert the BP register to its simple
pointer value. */
-# define UNCHECK_BOUNDS(rBP) \
+# define DISCARD_BOUNDS(rBP) \
lwz rBP, oVALUE(rBP)
/* Check low bound, with the side effect that the BP register is converted
@@ -99,7 +99,7 @@
#else
-# define UNCHECK_BOUNDS(rBP)
+# define DISCARD_BOUNDS(rBP)
# define CHECK_BOUNDS_LOW(rBP, rLOW, rHIGH)
# define CHECK_BOUNDS_HIGH(rVALUE, rHIGH, TWLcc)
# define CHECK_BOUNDS_HIGH_RTN(rVALUE, rHIGH, TWLcc)
diff --git a/sysdeps/powerpc/elf/libc-start.c b/sysdeps/powerpc/elf/libc-start.c
index 31b3d05..6a80bc7 100644
--- a/sysdeps/powerpc/elf/libc-start.c
+++ b/sysdeps/powerpc/elf/libc-start.c
@@ -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)
diff --git a/sysdeps/powerpc/elf/start.S b/sysdeps/powerpc/elf/start.S
index 63a4979..632505f 100644
--- a/sysdeps/powerpc/elf/start.S
+++ b/sysdeps/powerpc/elf/start.S
@@ -1,5 +1,5 @@
/* Startup code for programs linked with GNU libc.
- Copyright (C) 1998, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1998, 1999, 2000 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
@@ -27,6 +27,7 @@
Boston, MA 02111-1307, USA. */
#include <sysdep.h>
+#include "bp-sym.h"
/* These are the various addresses we require. */
.section ".rodata"
@@ -35,7 +36,7 @@
weak_extern(_fini)
L(start_addresses):
.long _SDA_BASE_
- .long JUMPTARGET(main)
+ .long JUMPTARGET(BP_SYM (main))
.long JUMPTARGET(_init)
.long JUMPTARGET(_fini)
ASM_SIZE_DIRECTIVE(L(start_addresses))
@@ -55,7 +56,7 @@ ENTRY(_start)
lis r8,L(start_addresses)@ha
lwzu r13,L(start_addresses)@l(r8)
/* and continue in libc-start, in glibc. */
- b JUMPTARGET(__libc_start_main)
+ b JUMPTARGET(BP_SYM (__libc_start_main))
END(_start)
/* Define a symbol for the first piece of initialized data. */