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/* ld.so _start code.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
ENTRY(_start)
/* Create an initial frame with 0 LR and FP */
cfi_undefined (c30)
mov c29, czr
mov c30, czr
mov c0, csp
bl _dl_start
/* Returns user entry point in x0. */
mov c21, c0
.globl _dl_start_user
.type _dl_start_user, %function
_dl_start_user:
/* Get argc. */
ldr x1, [csp]
/* Get argv. */
add c2, csp, 16
/* Compute envp. */
add c3, c2, x1, lsl 4
add c3, c3, 16
adrp c16, capinit_rtld_local
ldr c16, [c16, :lo12:capinit_rtld_local]
ldr c0, [c16]
bl _dl_init
/* Load the finalizer function. */
adrp c0, capinit_dl_fini
ldr c0, [c0, :lo12:capinit_dl_fini]
/* Jump to the user's entry point. */
mov c16, c21
br c16
END(_start)
.section .data.rel.ro.local,"aw"
.align 4
.type capinit_rtld_local, %object
.size capinit_rtld_local, 16
capinit_rtld_local:
.capinit _rtld_local
.xword 0
.xword 0
.type capinit_dl_fini, %object
.size capinit_dl_fini, 16
capinit_dl_fini:
.capinit _dl_fini
.xword 0
.xword 0
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