54 lines
1.6 KiB
ArmAsm
54 lines
1.6 KiB
ArmAsm
/* ld.so _start code.
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Copyright (C) 2022 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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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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ENTRY (_start)
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/* Create an initial frame with 0 LR and FP */
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cfi_undefined (x30)
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mov x29, #0
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mov x30, #0
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mov x0, sp
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PTR_ARG (0)
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bl _dl_start
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/* Returns user entry point in x0. */
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mov PTR_REG (21), PTR_REG (0)
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.globl _dl_start_user
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.type _dl_start_user, %function
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_dl_start_user:
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/* Get argc. */
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ldr PTR_REG (1), [sp]
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/* Get argv. */
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add x2, sp, PTR_SIZE
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/* Compute envp. */
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add PTR_REG (3), PTR_REG (2), PTR_REG (1), lsl PTR_LOG_SIZE
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add PTR_REG (3), PTR_REG (3), PTR_SIZE
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adrp x16, _rtld_local
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add PTR_REG (16), PTR_REG (16), :lo12:_rtld_local
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ldr PTR_REG (0), [x16]
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bl _dl_init
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/* Load the finalizer function. */
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adrp x0, _dl_fini
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add PTR_REG (0), PTR_REG (0), :lo12:_dl_fini
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/* Jump to the user's entry point. */
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mov x16, x21
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br x16
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END (_start)
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