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53120fbb68
Use the Global Offset Table to find the location of main in crt1. With lld the old code would point to main@plt, however ld.bfd fails to link when main is in a shared library. Fix this by using the GOT address to find main as it works with both lld and bfd. Reviewed by: jrtc27 Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D45259
69 lines
2.3 KiB
ArmAsm
69 lines
2.3 KiB
ArmAsm
/* LINTLIBRARY */
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/*-
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* Copyright 1996-1998 John D. Polstra.
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* Copyright 2014 Andrew Turner.
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* Copyright 2014-2015 The FreeBSD Foundation.
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* All rights reserved.
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*
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* Portions of this software were developed by Andrew Turner
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#include <sys/elf_common.h>
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/*
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* The program entry point
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* void _start(char **ap, void (*cleanup)(void)) __dead2
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*/
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ENTRY(_start)
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.cfi_undefined x30
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mov x3, x2 /* cleanup */
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add x1, x0, #8 /* load argv */
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ldr x0, [x0] /* load argc */
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add x2, x1, x0, lsl #3 /* env is after argv */
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add x2, x2, #8 /* argv is null terminated */
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#ifdef PIC
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adrp x4, :got:main
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ldr x4, [x4, :got_lo12:main]
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#else
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ldr x4, =main
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#endif
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#ifdef GCRT
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ldr x5, =eprol
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ldr x6, =etext
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/*
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* __libc_start1_gcrt(argc, argv, env, cleanup, main, &eprol, &etext)
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*/
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bl __libc_start1_gcrt
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eprol:
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#else
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/* __libc_start1(argc, argv, env, cleanup, main) */
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bl __libc_start1
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#endif
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END(_start)
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.section .note.GNU-stack,"",@progbits
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GNU_PROPERTY_AARCH64_FEATURE_1_NOTE(GNU_PROPERTY_AARCH64_FEATURE_1_VAL)
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