[PATCH] D144533: [clang][driver] Do not emit default '-Tdata' for AVR devices
Ben Shi via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Tue Feb 21 19:51:37 PST 2023
benshi001 added a comment.
Different AVR device families have different default linker scripts in avr-ld, but they have 95% similarity and look like as following, we can use `--defsym=__DATA_REGION_ORIGIN__` to decide the default data region range instead of current `-Tdata`.
/* Script for ld -r: link without relocation */
/* Copyright (C) 2014-2015 Free Software Foundation, Inc.
Copying and distribution of this script, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved. */
OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
OUTPUT_ARCH(avr:6)
__TEXT_REGION_ORIGIN__ = DEFINED(__TEXT_REGION_ORIGIN__) ? __TEXT_REGION_ORIGIN__ : 0;
__DATA_REGION_ORIGIN__ = DEFINED(__DATA_REGION_ORIGIN__) ? __DATA_REGION_ORIGIN__ : 0x800200;
__TEXT_REGION_LENGTH__ = DEFINED(__TEXT_REGION_LENGTH__) ? __TEXT_REGION_LENGTH__ : 1024K;
__DATA_REGION_LENGTH__ = DEFINED(__DATA_REGION_LENGTH__) ? __DATA_REGION_LENGTH__ : 0xfe00;
__EEPROM_REGION_LENGTH__ = DEFINED(__EEPROM_REGION_LENGTH__) ? __EEPROM_REGION_LENGTH__ : 64K;
__FUSE_REGION_LENGTH__ = DEFINED(__FUSE_REGION_LENGTH__) ? __FUSE_REGION_LENGTH__ : 1K;
__LOCK_REGION_LENGTH__ = DEFINED(__LOCK_REGION_LENGTH__) ? __LOCK_REGION_LENGTH__ : 1K;
__SIGNATURE_REGION_LENGTH__ = DEFINED(__SIGNATURE_REGION_LENGTH__) ? __SIGNATURE_REGION_LENGTH__ : 1K;
__USER_SIGNATURE_REGION_LENGTH__ = DEFINED(__USER_SIGNATURE_REGION_LENGTH__) ? __USER_SIGNATURE_REGION_LENGTH__ : 1K;
MEMORY
{
text (rx) : ORIGIN = __TEXT_REGION_ORIGIN__, LENGTH = __TEXT_REGION_LENGTH__
data (rw!x) : ORIGIN = __DATA_REGION_ORIGIN__, LENGTH = __DATA_REGION_LENGTH__
eeprom (rw!x) : ORIGIN = 0x810000, LENGTH = __EEPROM_REGION_LENGTH__
fuse (rw!x) : ORIGIN = 0x820000, LENGTH = __FUSE_REGION_LENGTH__
lock (rw!x) : ORIGIN = 0x830000, LENGTH = __LOCK_REGION_LENGTH__
signature (rw!x) : ORIGIN = 0x840000, LENGTH = __SIGNATURE_REGION_LENGTH__
user_signatures (rw!x) : ORIGIN = 0x850000, LENGTH = __USER_SIGNATURE_REGION_LENGTH__
}
SECTIONS
{
/* Read-only sections, merged into text segment: */
.hash 0 : { *(.hash) }
.dynsym 0 : { *(.dynsym) }
.dynstr 0 : { *(.dynstr) }
.gnu.version 0 : { *(.gnu.version) }
.gnu.version_d 0 : { *(.gnu.version_d) }
.gnu.version_r 0 : { *(.gnu.version_r) }
.rel.init 0 : { *(.rel.init) }
.rela.init 0 : { *(.rela.init) }
.rel.text 0 :
{
*(.rel.text)
}
.rela.text 0 :
{
*(.rela.text)
}
.rel.fini 0 : { *(.rel.fini) }
.rela.fini 0 : { *(.rela.fini) }
.rel.rodata 0 :
{
*(.rel.rodata)
}
.rela.rodata 0 :
{
*(.rela.rodata)
}
.rel.data 0 :
{
*(.rel.data)
}
.rela.data 0 :
{
*(.rela.data)
}
.rel.ctors 0 : { *(.rel.ctors) }
.rela.ctors 0 : { *(.rela.ctors) }
.rel.dtors 0 : { *(.rel.dtors) }
.rela.dtors 0 : { *(.rela.dtors) }
.rel.got 0 : { *(.rel.got) }
.rela.got 0 : { *(.rela.got) }
.rel.bss 0 : { *(.rel.bss) }
.rela.bss 0 : { *(.rela.bss) }
.rel.plt 0 : { *(.rel.plt) }
.rela.plt 0 : { *(.rela.plt) }
/* Internal text space or external memory. */
.text 0 :
{
*(.vectors)
KEEP(*(.vectors))
/* For data that needs to reside in the lower 64k of progmem. */
/* PR 13812: Placing the trampolines here gives a better chance
that they will be in range of the code that uses them. */
/* The jump trampolines for the 16-bit limited relocs will reside here. */
*(.trampolines)
/* avr-libc expects these data to reside in lower 64K. */
/* For future tablejump instruction arrays for 3 byte pc devices.
We don't relax jump/call instructions within these sections. */
*(.jumptables)
/* For code that needs to reside in the lower 128k progmem. */
*(.lowtext)
KEEP(SORT(*)(.ctors))
KEEP(SORT(*)(.dtors))
/* From this point on, we don't bother about wether the insns are
below or above the 16 bits boundary. */
*(.init0) /* Start here after reset. */
KEEP (*(.init0))
*(.init1)
KEEP (*(.init1))
*(.init2) /* Clear __zero_reg__, set up stack pointer. */
KEEP (*(.init2))
*(.init3)
KEEP (*(.init3))
*(.init4) /* Initialize data and BSS. */
KEEP (*(.init4))
*(.init5)
KEEP (*(.init5))
*(.init6) /* C++ constructors. */
KEEP (*(.init6))
*(.init7)
KEEP (*(.init7))
*(.init8)
KEEP (*(.init8))
*(.init9) /* Call main(). */
KEEP (*(.init9))
*(.text)
*(.fini9) /* _exit() starts here. */
KEEP (*(.fini9))
*(.fini8)
KEEP (*(.fini8))
*(.fini7)
KEEP (*(.fini7))
*(.fini6) /* C++ destructors. */
KEEP (*(.fini6))
*(.fini5)
KEEP (*(.fini5))
*(.fini4)
KEEP (*(.fini4))
*(.fini3)
KEEP (*(.fini3))
*(.fini2)
KEEP (*(.fini2))
*(.fini1)
KEEP (*(.fini1))
*(.fini0) /* Infinite loop after program termination. */
KEEP (*(.fini0))
}
.data 0 :
{
*(.data)
*(.gnu.linkonce.d*)
*(.rodata) /* We need to include .rodata here if gcc is used */
/* with -fdata-sections. */
*(.gnu.linkonce.r*)
}
.bss 0 :
{
*(.bss)
*(COMMON)
}
/* Global data not cleared after reset. */
.noinit 0:
{
*(.noinit*)
}
.eeprom 0:
{
/* See .data above... */
KEEP(*(.eeprom*))
}
.fuse 0:
{
KEEP(*(.fuse))
KEEP(*(.lfuse))
KEEP(*(.hfuse))
KEEP(*(.efuse))
}
.lock 0:
{
KEEP(*(.lock*))
}
.signature 0:
{
KEEP(*(.signature*))
}
.user_signatures 0:
{
KEEP(*(.user_signatures*))
}
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
.note.gnu.build-id : { *(.note.gnu.build-id) }
/* DWARF debug sections.
Symbols in the DWARF debugging sections are relative to the beginning
of the section so we begin them at 0. */
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
/* DWARF 1.1 and DWARF 2 */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
/* DWARF 2 */
.debug_info 0 : { *(.debug_info) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line .debug_line.* .debug_line_end ) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
/* SGI/MIPS DWARF 2 extensions */
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/* DWARF 3 */
.debug_pubtypes 0 : { *(.debug_pubtypes) }
.debug_ranges 0 : { *(.debug_ranges) }
/* DWARF Extension. */
.debug_macro 0 : { *(.debug_macro) }
}
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D144533/new/
https://reviews.llvm.org/D144533
More information about the cfe-commits
mailing list