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script.ld
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script.ld
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/*******************************************************************************
* Ledger Blue - Secure firmware
* (c) 2016, 2017 Ledger
* (c) 2018 Zonda GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
********************************************************************************/
/**
* Global chip memory layout and constants
*
*/
MEMORY
{
DISCARD (rwx) : ORIGIN = 0xd0000000, LENGTH = 1M
FLASH (rx) : ORIGIN = 0xc0d00000, LENGTH = 400K
SRAM (rwx) : ORIGIN = 0x20001800, LENGTH = 4K
}
PAGE_SIZE = 64;
STACK_SIZE = 848;
END_STACK = ORIGIN(SRAM) + LENGTH(SRAM);
SECTIONS
{
ENTRY(main)
/****************************************************************/
/* This section locates the code in FLASH */
/****************************************************************/
/** put text in Flash memory, VMA will be equal to LMA */
.text :
{
/* provide start code symbol, shall be zero */
_text = .;
_nvram = .;
PROVIDE(_setjmp = setjmp); /*thanks clang*/
/* ensure main is always @ 0xC0D00000 */
*(.boot*)
/* place the other code and rodata defined BUT nvram variables that are displaced in a r/w area */
*(.text*)
*(.rodata)
*(.rodata.[^N]*) /*.data.rel.ro* not here to detect invalid PIC usage */
*(.rodata.N[^_]*)
. = ALIGN(4);
/* all code placed */
_etext = .;
. = ALIGN(PAGE_SIZE);
_nvram_data = .;
/* NVM data (ex-filesystem) */
*(.bss.N_* .rodata.N_*)
. = ALIGN(PAGE_SIZE);
_envram_data = .;
_install_parameters = .;
_envram = .;
} > FLASH = 0x00
.data (NOLOAD):
{
. = ALIGN(4);
/**
* Place RAM initialized variables
*/
_data = .;
*(vtable)
*(.data*)
_edata = .;
} > DISCARD /*> SRAM AT>FLASH = 0x00 */
.bss :
{
/**
* Place RAM uninitialized variables
*/
_bss = .;
*(.bss*)
_ebss = .;
/**
* Reserve stack size
*/
. = ALIGN(4);
app_stack_canary = .;
PROVIDE(app_stack_canary = .);
. += 4;
_stack_validation = .;
. = _stack_validation + STACK_SIZE;
_stack = ABSOLUTE(END_STACK) - STACK_SIZE;
PROVIDE( _stack = ABSOLUTE(END_STACK) - STACK_SIZE);
_estack = ABSOLUTE(END_STACK);
PROVIDE( _estack = ABSOLUTE(END_STACK) );
} > SRAM = 0x00
/****************************************************************/
/* DEBUG */
/****************************************************************/
/* remove the debugging information from the standard libraries */
DEBUG (NOLOAD) :
{
libc.a ( * )
libm.a ( * )
libgcc.a ( * )
*(.ARM.exidx* .gnu.linkonce.armexidx.*)
}
/* 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) }
/* 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 .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.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) }
}