* 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.

7 files changed, 62 insertions, 35 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.  */
diff --git a/sysdeps/unix/sysv/linux/powerpc/brk.S b/sysdeps/unix/sysv/linux/powerpc/brk.S
index 69dd0ee..f3350e4 100644
--- a/sysdeps/unix/sysv/linux/powerpc/brk.S
+++ b/sysdeps/unix/sysv/linux/powerpc/brk.S
@@ -20,10 +20,14 @@
 #include <sysdep.h>
 #define _ERRNO_H	1
 #include <bits/errno.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
 
 	.comm	__curbrk,4,4
 	.section ".text"
-ENTRY(__brk)
+ENTRY (BP_SYM (__brk))
+	DISCARD_BOUNDS (r3)	/* the bounds are meaningless, so toss 'em */
+
 	stwu    r1,-16(r1)
 	stw	r3,8(r1)
 	DO_CALL(SYS_ify(brk))
@@ -45,6 +49,6 @@ ENTRY(__brk)
 	blelr+
 	li      r3,ENOMEM
 	b	JUMPTARGET(__syscall_error)
-END (__brk)
+END (BP_SYM (__brk))
 
-weak_alias (__brk, brk)
+weak_alias (BP_SYM (__brk), BP_SYM (brk))
diff --git a/sysdeps/unix/sysv/linux/powerpc/clone.S b/sysdeps/unix/sysv/linux/powerpc/clone.S
index d5703d6..ebcd82d 100644
--- a/sysdeps/unix/sysv/linux/powerpc/clone.S
+++ b/sysdeps/unix/sysv/linux/powerpc/clone.S
@@ -1,5 +1,5 @@
 /* Wrapper around clone system call.
-   Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1997, 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
@@ -20,14 +20,21 @@
 #include <sysdep.h>
 #define _ERRNO_H	1
 #include <bits/errno.h>
+#include <bp-sym.h>
+#include <bp-asm.h>
 
 /* This is the only really unusual system call in PPC linux, but not
    because of any weirdness in the system call itself; because of
    all the freaky stuff we have to do to make the call useful.  */
 
-/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+/* int [r3] clone(int (*fn)(void *arg) [r3], void *child_stack [r4],
+   		  int flags [r5], void *arg [r6]); */
+
+ENTRY (BP_SYM (__clone))
+	/* GKM FIXME: add bounds checks, where sensible.  */
+	DISCARD_BOUNDS (r4)
+	DISCARD_BOUNDS (r6)
 
-ENTRY(__clone)
 	/* Check for child_stack == NULL || fn == NULL.  */
 	cmpwi	cr0,r4,0
 	cmpwi	cr1,r3,0
@@ -82,6 +89,6 @@ L(parent):
 L(badargs):
 	li	r3,EINVAL
 	b	JUMPTARGET(__syscall_error)
-END (__clone)
+END (BP_SYM (__clone))
 
-weak_alias (__clone, clone)
+weak_alias (BP_SYM (__clone), BP_SYM (clone))
diff --git a/sysdeps/unix/sysv/linux/powerpc/mmap64.c b/sysdeps/unix/sysv/linux/powerpc/mmap64.c
index e081b76..dacbbe3 100644
--- a/sysdeps/unix/sysv/linux/powerpc/mmap64.c
+++ b/sysdeps/unix/sysv/linux/powerpc/mmap64.c
@@ -19,18 +19,18 @@
 
 #include <errno.h>
 #include <unistd.h>
+#include <sys/mman.h>
 
 #include <sysdep.h>
 #include <sys/syscall.h>
-
-#include <sys/mman.h>
+#include <bp-checks.h>
 
 #include <asm/page.h>
-
 #include "kernel-features.h"
 
 #ifdef __NR_mmap2
-extern __ptr_t __syscall_mmap2(__ptr_t, size_t, int, int, int, off_t);
+extern void *__unbounded __syscall_mmap2(void *__unbounded, size_t,
+					 int, int, int, off_t);
 #ifndef __ASSUME_MMAP2_SYSCALL
 static int have_no_mmap2;
 #endif
@@ -50,9 +50,13 @@ __mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd, off64_t offset)
       int saved_errno = errno;
 #endif
       /* This will be always 12, no matter what page size is.  */
-      __ptr_t result = INLINE_SYSCALL (mmap2, 6, addr, len, prot, flags,
-				       fd, (off_t) (offset >> PAGE_SHIFT));
-
+      __ptr_t result;
+      __ptrvalue (result) = INLINE_SYSCALL (mmap2, 6, __ptrvalue (addr), len, prot,
+					    flags, fd, (off_t) (offset >> PAGE_SHIFT));
+#if __BOUNDED_POINTERS__
+      __ptrlow (result) = __ptrvalue (result);
+      __ptrhigh (result) = __ptrvalue (result) + len;
+#endif
 #ifndef __ASSUME_MMAP2_SYSCALL
       if (result != (__ptr_t) -1 || errno != ENOSYS)
 #endif