938b6f1e5d
Building glibc for many different configurations and running the compilation parts of the testsuite runs into failures of the elf/check-execstack test for hppa and microblaze. Those configurations default to executable stacks in the Linux kernel because of VM_DATA_DEFAULT_FLAGS definitions including VM_EXEC (VM_DATA_DEFAULT_FLAGS being the default definition of VM_STACK_DEFAULT_FLAGS). This fails because those configurations are not generating .note.GNU-stack sections to indicate that programs do not need an executable stack. This patch fixes GCC to generate those sections on those architectures (when configured for a target using the Linux kernel), as it does on other architectures, together with adding that section to libgcc .S sources, with the same code as used on other architectures (or a variant using "#ifdef __linux__" instead of the usual "#if defined(__ELF__) && defined(__linux__)" for microblaze, as that configuration doesn't use elfos.h and so doesn't define __ELF__). This suffices to eliminate that glibc test failure. (For hppa, the compilation parts of the glibc testsuite still fail because of the separate elf/check-textrel failure.) gcc: * config/microblaze/linux.h (TARGET_ASM_FILE_END): Likewise. * config/pa/pa.h (NEED_INDICATE_EXEC_STACK): Likewise. * config/pa/pa-linux.h (NEED_INDICATE_EXEC_STACK): Likewise. * config/pa/pa.c (pa_hpux_file_end): Rename to pa_file_end. Define unconditionally, with [ASM_OUTPUT_EXTERNAL_REAL] conditionals inside the function instead of around it. Call file_end_indicate_exec_stack if NEED_INDICATE_EXEC_STACK. (TARGET_ASM_FILE_END): Define unconditionally to pa_file_end. libgcc: * config/microblaze/crti.S, config/microblaze/crtn.S, config/microblaze/divsi3.S, config/microblaze/moddi3.S, config/microblaze/modsi3.S, config/microblaze/muldi3_hard.S, config/microblaze/mulsi3.S, config/microblaze/stack_overflow_exit.S, config/microblaze/udivsi3.S, config/microblaze/umodsi3.S, config/pa/milli64.S: Add .note.GNU-stack section. From-SVN: r253204
68 lines
2.0 KiB
ArmAsm
68 lines
2.0 KiB
ArmAsm
###################################-*-asm*-
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#
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# Copyright (C) 2009-2017 Free Software Foundation, Inc.
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#
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#
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# Contributed by Michael Eager <eager@eagercon.com>.
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#
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# This file is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 3, or (at your option) any
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# later version.
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#
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# GCC is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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#
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# Under Section 7 of GPL version 3, you are granted additional
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# permissions described in the GCC Runtime Library Exception, version
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# 3.1, as published by the Free Software Foundation.
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#
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# You should have received a copy of the GNU General Public License and
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# a copy of the GCC Runtime Library Exception along with this program;
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# see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# stack_overflow_exit.S
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#
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# Checks for stack overflows and sets the global variable
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# stack_overflow_error with the value of current stack pointer
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#
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# This routine exits from the program
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#
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#######################################
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/* An executable stack is *not* required for these functions. */
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#ifdef __linux__
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.section .note.GNU-stack,"",%progbits
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.previous
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#endif
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.globl _stack_overflow_error
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.data
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.align 2
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.type _stack_overflow_error,@object
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.size _stack_overflow_error,4
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_stack_overflow_error:
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.data32 0
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.text
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.globl _stack_overflow_exit
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.ent _stack_overflow_exit
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.type _stack_overflow_exit,@function
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_stack_overflow_exit:
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#ifdef __PIC__
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mfs r20,rpc
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addik r20,r20,_GLOBAL_OFFSET_TABLE_+8
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swi r1,r20,_stack_overflow_error@GOTOFF
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bri exit@PLT
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#else
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swi r1,r0,_stack_overflow_error
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bri exit
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#endif
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.end _stack_overflow_exit
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.size _stack_overflow_exit,. - _stack_overflow_exit
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