738bdb95b7
As __start must be placed at a precise location, a separate, explicit input section is needed to guarantee this. Why is this an issue ? NuttX uses --entry=__start which puts __start in its correct location, but out-of-tree builds won't work, so it more robust to use an explicit section for the startup code and enforce its placement in the linker script.
130 lines
3.3 KiB
Plaintext
130 lines
3.3 KiB
Plaintext
/****************************************************************************
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* boards/arm64/a64/pinephone/scripts/dramboot.ld
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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OUTPUT_ARCH(aarch64)
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ENTRY(__start)
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PHDRS
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{
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text PT_LOAD ;
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}
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SECTIONS
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{
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. = 0x40080000; /* U-Boot loads NuttX at this address (kernel_addr_r) */
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_start = .;
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.text : {
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_stext = .; /* Text section */
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*(.start .start.*) /* Place __start here */
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*(.text)
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*(.text.cold)
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*(.text.unlikely)
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*(.fixup)
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*(.gnu.warning)
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} :text = 0x9090
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. = ALIGN(4096);
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.init_section : {
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_sinit = ABSOLUTE(.);
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KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
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KEEP(*(.init_array .ctors))
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_einit = ABSOLUTE(.);
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}
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. = ALIGN(4096);
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.vector : {
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_vector_start = .;
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KEEP(*(.exc_vector_table))
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KEEP(*(".exc_vector_table.*"))
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KEEP(*(.vectors))
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_vector_end = .;
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} :text
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. = ALIGN(4096);
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_etext = .; /* End_1 of .text */
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_sztext = _etext - _stext;
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. = ALIGN(4096);
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.rodata : {
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_srodata = .; /* Read-only data */
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*(.rodata)
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*(.rodata.*)
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*(.data.rel.ro)
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*(.data.rel.ro.*)
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} :text
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. = ALIGN(4096);
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_erodata = .; /* End of read-only data */
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_szrodata = _erodata - _srodata;
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_eronly = .; /* End of read-only data */
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. = ALIGN(4096);
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.data : { /* Data */
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_sdata = .;
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*(.data.page_aligned)
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*(.data)
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. = ALIGN(8);
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*(.data.rel)
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*(.data.rel.*)
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CONSTRUCTORS
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} :text
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_edata = .; /* End+1 of .data */
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.bss : { /* BSS */
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. = ALIGN(8);
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_sbss = .;
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*(.bss)
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. = ALIGN(8);
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} :text
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. = ALIGN(4096);
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_ebss = .;
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_szbss = _ebss - _sbss;
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.initstack : { /* INIT STACK */
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_s_initstack = .;
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*(.initstack)
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. = ALIGN(16);
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} :text
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. = ALIGN(4096);
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_e_initstack = . ;
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g_idle_topstack = . ;
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_szdata = _e_initstack - _sdata;
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/* Sections to be discarded */
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/DISCARD/ : {
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*(.exit.text)
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*(.exit.data)
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*(.exitcall.exit)
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*(.eh_frame)
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}
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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}
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