54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/* Machine-dependent ELF dynamic relocation inline functions. ARM/NaCl version.
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Copyright (C) 2015-2017 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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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef dl_machine_h
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/* This is only needed for handling TEXTRELs and NaCl will never
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support TEXTRELs at all. */
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#define CLEAR_CACHE(start, end) __builtin_trap ()
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#endif
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/* The rest is just machine-specific.
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This #include is outside the #ifndef because the parts of
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dl-machine.h used only by dynamic-link.h are outside the guard. */
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#include <sysdeps/arm/dl-machine.h>
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#ifdef dl_machine_h
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/* Initial entry point code for the dynamic linker.
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The C function `_dl_start' is the real entry point;
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its return value is the user program's entry point. */
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#undef RTLD_START
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#define RTLD_START asm ("\
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.text\n\
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.globl _start\n\
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.type _start, %function\n\
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.p2align 4\n\
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_start:\n\
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@ r0 has the pointer to the info block (see nacl_startup.h)\n\
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mov r1, sp @ Save stack base for __libc_stack_end.\n\
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push {r0-r3} @ Push those, maintaining alignment to 16.\n\
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mov r0, sp @ Pointer to {info, sp} is argument.\n\
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sfi_bl _dl_start\n\
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pop {r1-r4} @ Restore stack, getting info block into r1.\n\
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mov lr, #0 @ Return address for noreturn call.\n\
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b _dl_start_user");
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#endif
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