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https://github.com/Atmosphere-NX/Atmosphere
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Add chainloader (stage2) (need to edit more files)
This commit is contained in:
TuxSH
parent
2c07b5a2fb
commit
75dfcd07a9
4 changed files with 67 additions and 14 deletions
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@ -3,6 +3,12 @@ OUTPUT_ARCH(arm)
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ENTRY(_start)
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/* Mostly copied from https://github.com/devkitPro/buildscripts/blob/master/dkarm-eabi/crtls/3dsx.ld */
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MEMORY
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{
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NULL : ORIGIN = 0x00000000, LENGTH = 0x1000
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main : ORIGIN = 0xFFF00000, LENGTH = 0x00100000
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low_iram : ORIGIN = 0x40003000, LENGTH = 0x4000
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}
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SECTIONS
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{
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@ -30,7 +36,7 @@ SECTIONS
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/* .fini */
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KEEP( *(.fini) )
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. = ALIGN(4);
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}
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} >main
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.rodata :
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{
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@ -41,14 +47,14 @@ SECTIONS
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*(.gnu.linkonce.r*)
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SORT(CONSTRUCTORS)
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. = ALIGN(4);
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}
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} >main
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.preinit_array ALIGN(4) :
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{
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PROVIDE (__preinit_array_start = .);
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KEEP (*(.preinit_array))
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PROVIDE (__preinit_array_end = .);
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}
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} >main
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.init_array ALIGN(4) :
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{
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@ -56,7 +62,7 @@ SECTIONS
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KEEP (*(SORT(.init_array.*)))
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KEEP (*(.init_array))
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PROVIDE (__init_array_end = .);
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}
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} >main
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.fini_array ALIGN(4) :
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{
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@ -64,7 +70,7 @@ SECTIONS
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KEEP (*(.fini_array))
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KEEP (*(SORT(.fini_array.*)))
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PROVIDE (__fini_array_end = .);
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}
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} >main
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.ctors ALIGN(4) :
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{
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@ -72,7 +78,7 @@ SECTIONS
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KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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}
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} >main
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.dtors ALIGN(4) :
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{
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@ -80,11 +86,11 @@ SECTIONS
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KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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}
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} >main
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.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) }
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.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >main
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__exidx_start = .;
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ARM.exidx : { *(.ARM.exidx* .gnu.linkonce.armexidx.*) }
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ARM.exidx : { *(.ARM.exidx* .gnu.linkonce.armexidx.*) } >main
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__exidx_end = .;
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.data :
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@ -94,19 +100,31 @@ SECTIONS
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*(.gnu.linkonce.d*)
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CONSTRUCTORS
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. = ALIGN(4);
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}
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} >main
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.chainloader :
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{
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. = ALIGN(32);
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KEEP(*(.chainloader.text.start))
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build/chainloader.o(.text*)
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build/chainloader.o(.rodata*)
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build/chainloader.o(.data*)
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. = ALIGN(8);
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build/chainloader.o(.bss*)
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. = ALIGN(32);
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} >low_iram
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__bss_start__ = ALIGN(32);
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.bss :
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{
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__bss_start__ = ALIGN(32);
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*(.dynbss)
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*(.bss)
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*(.bss.*)
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*(.gnu.linkonce.b*)
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*(COMMON)
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. = ALIGN(8);
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}
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__bss_end__ = .;
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__bss_end__ = .;
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} >main
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__end__ = ABSOLUTE(.) ;
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/* ==================
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12
fusee/fusee-secondary/src/chainloader.c
Normal file
12
fusee/fusee-secondary/src/chainloader.c
Normal file
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@ -0,0 +1,12 @@
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#include "chainloader.h"
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uint8_t g_payload_arg_data[PAYLOAD_ARG_DATA_MAX_SIZE] = {1};
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#pragma GCC optimize (3)
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void relocate_and_chainload_main(uintptr_t load_address, uintptr_t src_address, size_t size, int argc) {
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for(size_t i = 0; i < size; i++) {
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*(uint8_t *)(load_address + i) = *(uint8_t *)(src_address + i);
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}
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((void (*)(int, void *))load_address)(argc, g_payload_arg_data);
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}
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13
fusee/fusee-secondary/src/chainloader.h
Normal file
13
fusee/fusee-secondary/src/chainloader.h
Normal file
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@ -0,0 +1,13 @@
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#ifndef FUSEE_CHAINLOADER_H
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#define FUSEE_CHAINLOADER_H
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#include <stddef.h>
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#include <stdint.h>
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#define PAYLOAD_ARG_DATA_MAX_SIZE 0x1000
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extern uint8_t g_payload_arg_data[PAYLOAD_ARG_DATA_MAX_SIZE];
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void relocate_and_chainload(uintptr_t load_address, uintptr_t src_address, size_t size, int argc);
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#endif
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@ -2,10 +2,11 @@
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mov r\@, #0
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.endm
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.section .text.start
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.section .text.start, "ax", %progbits
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.arm
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.align 5
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.global _start
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.type _start, %function
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_start:
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/* Insert NOPs for convenience (i.e. to use Nintendo's BCTs, for example) */
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.rept 16
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@ -57,3 +58,12 @@ _start:
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ldmfd sp!, {r0, r1}
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bl main
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b .
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.section .chainloader.text.start, "ax", %progbits
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.arm
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.align 5
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.global relocate_and_chainload
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.type relocate_and_chainload, %function
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relocate_and_chainload:
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ldr sp, =0x40010000
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b relocate_and_chainload_main
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