16f3e95b32
Historically, the top three bytes of personality have been used for things such as ADDR_NO_RANDOMIZE, which made sense only for specific architectures. We now however have a flag there that is general no matter the architecture (UNAME26); generally we have to be careful to preserve the personality flags across exec(). This patch tries to fix all architectures that forcefully overwrite personality flags during exec() (ppc32 and s390 have been fixed recently by commitsf9783ec862("[S390] Do not clobber personality flags on exec") and59e4c3a2fe("powerpc/32: Don't clobber personality flags on exec") in a similar way already). Signed-off-by: Jiri Kosina <jkosina@suse.cz> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Mark Salter <msalter@redhat.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/*
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* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2008-2009 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_ELF_H
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#define _ASM_MICROBLAZE_ELF_H
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/*
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* Note there is no "official" ELF designation for Microblaze.
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* I've snaffled the value from the microblaze binutils source code
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* /binutils/microblaze/include/elf/microblaze.h
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*/
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#define EM_MICROBLAZE 189
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#define EM_MICROBLAZE_OLD 0xbaab
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#define ELF_ARCH EM_MICROBLAZE
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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*/
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#define elf_check_arch(x) ((x)->e_machine == EM_MICROBLAZE \
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|| (x)->e_machine == EM_MICROBLAZE_OLD)
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/*
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* These are used to set parameters in the core dumps.
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*/
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#define ELF_CLASS ELFCLASS32
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#ifndef __uClinux__
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/*
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* ELF register definitions..
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*/
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#include <asm/ptrace.h>
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#include <asm/byteorder.h>
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#ifndef ELF_GREG_T
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#define ELF_GREG_T
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typedef unsigned long elf_greg_t;
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#endif
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#ifndef ELF_NGREG
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#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
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#endif
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#ifndef ELF_GREGSET_T
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#define ELF_GREGSET_T
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typedef elf_greg_t elf_gregset_t[ELF_NGREG];
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#endif
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#ifndef ELF_FPREGSET_T
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#define ELF_FPREGSET_T
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/* TBD */
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#define ELF_NFPREG 33 /* includes fsr */
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typedef unsigned long elf_fpreg_t;
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typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
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/* typedef struct user_fpu_struct elf_fpregset_t; */
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#endif
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/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
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* use of this is to invoke "./ld.so someprog" to test out a new version of
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* the loader. We need to make sure that it is out of the way of the program
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* that it will "exec", and that there is sufficient room for the brk.
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*/
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#define ELF_ET_DYN_BASE (0x08000000)
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#ifdef __MICROBLAZEEL__
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#define ELF_DATA ELFDATA2LSB
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#else
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#define ELF_DATA ELFDATA2MSB
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#endif
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#define ELF_EXEC_PAGESIZE PAGE_SIZE
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#define ELF_CORE_COPY_REGS(_dest, _regs) \
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memcpy((char *) &_dest, (char *) _regs, \
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sizeof(struct pt_regs));
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/* This yields a mask that user programs can use to figure out what
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* instruction set this CPU supports. This could be done in user space,
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* but it's not easy, and we've already done it here.
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*/
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#define ELF_HWCAP (0)
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/* This yields a string that ld.so will use to load implementation
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* specific libraries for optimization. This is more specific in
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* intent than poking at uname or /proc/cpuinfo.
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* For the moment, we have only optimizations for the Intel generations,
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* but that could change...
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*/
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#define ELF_PLATFORM (NULL)
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/* Added _f parameter. Is this definition correct: TBD */
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#define ELF_PLAT_INIT(_r, _f) \
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do { \
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_r->r1 = _r->r1 = _r->r2 = _r->r3 = \
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_r->r4 = _r->r5 = _r->r6 = _r->r7 = \
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_r->r8 = _r->r9 = _r->r10 = _r->r11 = \
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_r->r12 = _r->r13 = _r->r14 = _r->r15 = \
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_r->r16 = _r->r17 = _r->r18 = _r->r19 = \
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_r->r20 = _r->r21 = _r->r22 = _r->r23 = \
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_r->r24 = _r->r25 = _r->r26 = _r->r27 = \
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_r->r28 = _r->r29 = _r->r30 = _r->r31 = \
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0; \
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} while (0)
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#ifdef __KERNEL__
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#define SET_PERSONALITY(ex) \
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set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
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#endif
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#endif /* __uClinux__ */
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#endif /* _ASM_MICROBLAZE_ELF_H */
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