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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.
This commit is contained in:
Greg McGary
parent
137bca87e7
commit
df0f2bf8cc
13
ChangeLog
13
ChangeLog
@ -1,3 +1,16 @@
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2000-07-21 Greg McGary <greg@mcgary.org>
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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.
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* sysdeps/powerpc/elf/libc-start.c (__libc_start_main):
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Wrap bounds around argv & envp and each of their string members.
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* sysdeps/powerpc/elf/start.S: Designate BP symbols.
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* sysdeps/unix/sysv/linux/powerpc/brk.S: Wrap entry-point
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symbol in BP_SYM (). Discard bounds of address arg.
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* sysdeps/unix/sysv/linux/powerpc/clone.S: Likewise.
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* sysdeps/unix/sysv/linux/powerpc/mmap64.c (__mmap64):
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Discard bounds on address arg, add bounds to return value.
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2000-07-20 Ulrich Drepper <drepper@redhat.com>
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* elf/Makefile (tests): Add filter. Add rules to generate filter.
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@ -1,4 +1,4 @@
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/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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/* Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -34,6 +34,7 @@
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# define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18 in total */
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# define JB_CR 21 /* Condition code registers. */
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# define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total */
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# define JB_SIZE (58*4)
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#endif
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#ifndef _ASM
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@ -30,7 +30,7 @@
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/* Don't check bounds, just convert the BP register to its simple
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pointer value. */
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# define UNCHECK_BOUNDS(rBP) \
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# define DISCARD_BOUNDS(rBP) \
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lwz rBP, oVALUE(rBP)
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/* Check low bound, with the side effect that the BP register is converted
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@ -99,7 +99,7 @@
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#else
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# define UNCHECK_BOUNDS(rBP)
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# define DISCARD_BOUNDS(rBP)
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# define CHECK_BOUNDS_LOW(rBP, rLOW, rHIGH)
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# define CHECK_BOUNDS_HIGH(rVALUE, rHIGH, TWLcc)
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# define CHECK_BOUNDS_HIGH_RTN(rVALUE, rHIGH, TWLcc)
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@ -19,6 +19,8 @@
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#include <stdlib.h>
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#include <unistd.h>
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#include <ldsodefs.h>
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#include <bp-start.h>
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#include <bp-sym.h>
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extern void __libc_init_first (int argc, char **argv, char **envp);
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@ -29,18 +31,27 @@ extern void *__libc_stack_end;
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struct startup_info
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{
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void *sda_base;
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void *__unbounded sda_base;
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int (*main) (int, char **, char **, void *);
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int (*init) (int, char **, char **, void *);
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void (*fini) (void);
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};
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int
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__libc_start_main (int argc, char **argv, char **envp,
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void *auxvec, void (*rtld_fini) (void),
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struct startup_info *stinfo,
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char **stack_on_entry)
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/* GKM FIXME: GCC: this should get __BP_ prefix by virtue of the
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BPs in the arglist of startup_info.main and startup_info.init. */
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BP_SYM (__libc_start_main) (int argc, char *__unbounded *__unbounded ubp_av,
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char *__unbounded *__unbounded ubp_ev,
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void *__unbounded auxvec, void (*rtld_fini) (void),
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struct startup_info *__unbounded stinfo,
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char *__unbounded *__unbounded stack_on_entry)
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{
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#if __BOUNDED_POINTERS__
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char **argv;
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#else
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# define argv ubp_av
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#endif
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#ifndef SHARED
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/* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
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If the address would be taken inside the expression the optimizer
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@ -58,23 +69,22 @@ __libc_start_main (int argc, char **argv, char **envp,
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/* ...in which case, we have argc as the top thing on the
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stack, followed by argv (NULL-terminated), envp (likewise),
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and the auxilary vector. */
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argc = *(int *) stack_on_entry;
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argv = stack_on_entry + 1;
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envp = argv + argc + 1;
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auxvec = envp;
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while (*(char **) auxvec != NULL)
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argc = *(int *__unbounded) stack_on_entry;
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ubp_av = stack_on_entry + 1;
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ubp_ev = ubp_av + argc + 1;
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auxvec = ubp_ev;
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while (*(char *__unbounded *__unbounded) auxvec != NULL)
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++auxvec;
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++auxvec;
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rtld_fini = NULL;
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}
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INIT_ARGV_and_ENVIRON;
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/* Store something that has some relationship to the end of the
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stack, for backtraces. This variable should be thread-specific. */
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__libc_stack_end = stack_on_entry + 4;
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/* Set the global _environ variable correctly. */
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__environ = envp;
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/* Register the destructor of the dynamic linker if there is any. */
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if (rtld_fini != NULL)
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atexit (rtld_fini);
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@ -84,7 +94,7 @@ __libc_start_main (int argc, char **argv, char **envp,
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if (_dl_debug_impcalls)
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_dl_debug_message (1, "\ninitialize libc\n\n", NULL);
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#endif
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__libc_init_first (argc, argv, envp);
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__libc_init_first (argc, argv, __environ);
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/* Register the destructor of the program, if any. */
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if (stinfo->fini)
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@ -1,5 +1,5 @@
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/* Startup code for programs linked with GNU libc.
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Copyright (C) 1998, 1999 Free Software Foundation, Inc.
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Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -27,6 +27,7 @@
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Boston, MA 02111-1307, USA. */
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#include <sysdep.h>
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#include "bp-sym.h"
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/* These are the various addresses we require. */
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.section ".rodata"
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@ -35,7 +36,7 @@
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weak_extern(_fini)
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L(start_addresses):
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.long _SDA_BASE_
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.long JUMPTARGET(main)
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.long JUMPTARGET(BP_SYM (main))
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.long JUMPTARGET(_init)
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.long JUMPTARGET(_fini)
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ASM_SIZE_DIRECTIVE(L(start_addresses))
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@ -55,7 +56,7 @@ ENTRY(_start)
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lis r8,L(start_addresses)@ha
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lwzu r13,L(start_addresses)@l(r8)
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/* and continue in libc-start, in glibc. */
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b JUMPTARGET(__libc_start_main)
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b JUMPTARGET(BP_SYM (__libc_start_main))
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END(_start)
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/* Define a symbol for the first piece of initialized data. */
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@ -20,10 +20,14 @@
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#include <sysdep.h>
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#define _ERRNO_H 1
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#include <bits/errno.h>
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#include <bp-sym.h>
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#include <bp-asm.h>
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.comm __curbrk,4,4
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.section ".text"
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ENTRY(__brk)
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ENTRY (BP_SYM (__brk))
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DISCARD_BOUNDS (r3) /* the bounds are meaningless, so toss 'em */
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stwu r1,-16(r1)
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stw r3,8(r1)
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DO_CALL(SYS_ify(brk))
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@ -45,6 +49,6 @@ ENTRY(__brk)
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blelr+
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li r3,ENOMEM
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b JUMPTARGET(__syscall_error)
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END (__brk)
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END (BP_SYM (__brk))
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weak_alias (__brk, brk)
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weak_alias (BP_SYM (__brk), BP_SYM (brk))
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@ -1,5 +1,5 @@
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/* Wrapper around clone system call.
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Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
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Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -20,14 +20,21 @@
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#include <sysdep.h>
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#define _ERRNO_H 1
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#include <bits/errno.h>
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#include <bp-sym.h>
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#include <bp-asm.h>
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/* This is the only really unusual system call in PPC linux, but not
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because of any weirdness in the system call itself; because of
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all the freaky stuff we have to do to make the call useful. */
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/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
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/* int [r3] clone(int (*fn)(void *arg) [r3], void *child_stack [r4],
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int flags [r5], void *arg [r6]); */
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ENTRY (BP_SYM (__clone))
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/* GKM FIXME: add bounds checks, where sensible. */
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DISCARD_BOUNDS (r4)
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DISCARD_BOUNDS (r6)
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ENTRY(__clone)
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/* Check for child_stack == NULL || fn == NULL. */
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cmpwi cr0,r4,0
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cmpwi cr1,r3,0
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@ -82,6 +89,6 @@ L(parent):
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L(badargs):
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li r3,EINVAL
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b JUMPTARGET(__syscall_error)
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END (__clone)
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END (BP_SYM (__clone))
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weak_alias (__clone, clone)
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weak_alias (BP_SYM (__clone), BP_SYM (clone))
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@ -19,18 +19,18 @@
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#include <errno.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include <sys/mman.h>
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#include <bp-checks.h>
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#include <asm/page.h>
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#include "kernel-features.h"
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#ifdef __NR_mmap2
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extern __ptr_t __syscall_mmap2(__ptr_t, size_t, int, int, int, off_t);
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extern void *__unbounded __syscall_mmap2(void *__unbounded, size_t,
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int, int, int, off_t);
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#ifndef __ASSUME_MMAP2_SYSCALL
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static int have_no_mmap2;
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#endif
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@ -50,9 +50,13 @@ __mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd, off64_t offset)
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int saved_errno = errno;
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#endif
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/* This will be always 12, no matter what page size is. */
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__ptr_t result = INLINE_SYSCALL (mmap2, 6, addr, len, prot, flags,
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fd, (off_t) (offset >> PAGE_SHIFT));
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__ptr_t result;
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__ptrvalue (result) = INLINE_SYSCALL (mmap2, 6, __ptrvalue (addr), len, prot,
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flags, fd, (off_t) (offset >> PAGE_SHIFT));
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#if __BOUNDED_POINTERS__
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__ptrlow (result) = __ptrvalue (result);
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__ptrhigh (result) = __ptrvalue (result) + len;
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#endif
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#ifndef __ASSUME_MMAP2_SYSCALL
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if (result != (__ptr_t) -1 || errno != ENOSYS)
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#endif
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