diff --git a/dka-crtls/ds_arm7.ld b/dka-crtls/ds_arm7.ld new file mode 100644 index 0000000..ba14a14 --- /dev/null +++ b/dka-crtls/ds_arm7.ld @@ -0,0 +1,293 @@ +/* Linker Script Original v1.3 by Jeff Frohwein */ +/* v1.0 - Original release */ +/* v1.1 - Added proper .data section support */ +/* v1.2 - Added support for c++ & iwram overlays */ +/* - Major contributions by Jason Wilkins. */ +/* v1.3 - .ewram section now can be used when */ +/* compiling for MULTIBOOT mode. This fixes */ +/* malloc() in DevKitAdvance which depends */ +/* on __eheap_start instead of end to define*/ +/* the starting location of heap space. */ +/* External global variable __gba_iwram_heap*/ +/* support added to allow labels end, _end, */ +/* & __end__ to point to end of iwram or */ +/* the end of ewram. */ +/* */ +/* Additions by WinterMute */ +/* v1.4 - .sbss section added for unitialised */ +/* data in ewram */ +/* v1.5 - padding section added to stop EZF */ +/* stripping important data */ +/* Additions by Joat: */ +/* v1.6 - Adapted for the DS */ + +/* This file is released into the public domain */ +/* for commercial or non-commercial use with no */ +/* restrictions placed upon it. */ + +/* NOTE!!!: This linker script defines the RAM & */ +/* ROM start addresses. In order for it to work */ +/* properly, remove -Ttext and -Tbss linker */ +/* options from your makefile if they are */ +/* present. */ + +/* You can use the following to view section */ +/* addresses in your .elf file: */ +/* objdump -h file.elf */ +/* Please note that empty sections may incorrectly*/ +/* list the lma address as the vma address for */ +/* some versions of objdump. */ + +OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +/* SEARCH_DIR(/bin/arm); */ + +/* The linker script function "var1 += var2;" sometimes */ +/* reports incorrect values in the *.map file but the */ +/* actual value it calculates is usually, if not always, */ +/* correct. If you leave out the ". = ALIGN(4);" at the */ +/* end of each section then the return value of SIZEOF() */ +/* is sometimes incorrect and "var1 += var2;" appears to */ +/* not work as well. "var1 += var2" style functions are */ +/* avoided below as a result. */ + +/* The linker script MEMORY directive is not used here due */ +/* to the fact that __text_start is not always a fixed value. */ + +__ewram_start = 0x03800000; +/*__ewram_start = 0x023C0000;*/ +__text_start = 0x02380000; +__eheap_end = 0x03810000 - 0x1000; +/*__eheap_end = 0x02400000;*/ +__iwram_start = 0x03810000 - 0x800;/* tiny, error */ +__iheap_end = 0x03810000 - 0x400; +__sp_usr = 0x03810000 - 0x140; +__sp_irq = 0x03810000 - 0x60; +__sp_usr_offset = __sp_usr - __iwram_start; + +SECTIONS +{ + . = __text_start; + .init : + { + KEEP (*(.init)) + . = ALIGN(4); + } =0xff + + .plt : + { + *(.plt) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } + + .text : /* ALIGN (4): */ + { + *(EXCLUDE_FILE (*.iwram*) .text) + *(.text.*) + *(.stub) + /* .gnu.warning sections are handled specially by elf32.em. */ + *(.gnu.warning) + *(.gnu.linkonce.t*) + *(.glue_7) + *(.glue_7t) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + __text_end = .; + .fini : + { + KEEP (*(.fini)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } =0 + + .rodata : + { + *(.rodata) + *all.rodata*(*) + *(.roda) + *(.rodata.*) + *(.gnu.linkonce.r*) + SORT(CONSTRUCTORS) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + .ctors : + { + /* gcc uses crtbegin.o to find the start of the constructors, so + we make sure it is first. Because this is a wildcard, it + doesn't matter if the user does not actually link against + crtbegin.o; the linker won't look for a file to match a + wildcard. The wildcard also means that it doesn't matter which + directory crtbegin.o is in. */ + KEEP (*crtbegin.o(.ctors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors)) + KEEP (*(SORT(.ctors.*))) + KEEP (*(.ctors)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + + .dtors : + { + KEEP (*crtbegin.o(.dtors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors)) + KEEP (*(SORT(.dtors.*))) + KEEP (*(.dtors)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + .jcr : { KEEP (*(.jcr)) } + +/* laddr = ADDR(.init) + SIZEOF(.init) + SIZEOF(.text) + SIZEOF(.fini) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors); +*/ + .eh_frame : + { + KEEP (*(.eh_frame)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + + .gcc_except_table : + { + *(.gcc_except_table) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + __iwram_lma = .; + + .iwram __iwram_start : AT (__iwram_lma) + { + __iwram_start = ABSOLUTE(.) ; + *(.iwram) + *iwram.*(.text) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + __data_lma = __iwram_lma + SIZEOF(.iwram) ; + __iwram_end = . ; + + .bss ALIGN(4) : + { + __bss_start = ABSOLUTE(.); + __bss_start__ = ABSOLUTE(.); + *(.dynbss) + *(.gnu.linkonce.b*) + *(COMMON) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } + + __bss_end = . ; + __bss_end__ = . ; + + .data ALIGN(4) : AT (__data_lma) + { + __data_start = ABSOLUTE(.); + *(.data) + *(.data.*) + *(.gnu.linkonce.d*) + CONSTRUCTORS + } = 0xff + + __iwram_overlay_lma = __data_lma + SIZEOF(.data); + + __data_end = .; + PROVIDE (edata = .); + __iwram_overlay_start = . ; + + OVERLAY : NOCROSSREFS AT (__iwram_overlay_lma) + { + .iwram0 { *(.iwram0) . = ALIGN(4);} + .iwram1 { *(.iwram1) . = ALIGN(4);} + .iwram2 { *(.iwram2) . = ALIGN(4);} + .iwram3 { *(.iwram3) . = ALIGN(4);} + .iwram4 { *(.iwram4) . = ALIGN(4);} + .iwram5 { *(.iwram5) . = ALIGN(4);} + .iwram6 { *(.iwram6) . = ALIGN(4);} + .iwram7 { *(.iwram7) . = ALIGN(4);} + .iwram8 { *(.iwram8) . = ALIGN(4);} + .iwram9 { *(.iwram9) . = ALIGN(4);} + } = 0xff + __ewram_lma = LOADADDR(.iwram0) + SIZEOF(.iwram0)+SIZEOF(.iwram1)+SIZEOF(.iwram2)+SIZEOF(.iwram3)+SIZEOF(.iwram4)+SIZEOF(.iwram5)+SIZEOF(.iwram6)+SIZEOF(.iwram7)+SIZEOF(.iwram8)+SIZEOF(.iwram9); + + __iwram_overlay_end = . ; + __iheap_start = . ; + + .ewram __ewram_start : AT (__ewram_lma) + { + *(.ewram) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + __ewram_overlay_lma = __ewram_lma + SIZEOF(.ewram); + + .sbss ALIGN(4): + { + *(.sbss) + . = ALIGN(4); + } + + __ewram_end = . ; + __ewram_overlay_start = . ; + + OVERLAY ALIGN(4): NOCROSSREFS AT (__ewram_overlay_lma) + { + .ewram0 { *(.ewram0) . = ALIGN(4);} + .ewram1 { *(.ewram1) . = ALIGN(4);} + .ewram2 { *(.ewram2) . = ALIGN(4);} + .ewram3 { *(.ewram3) . = ALIGN(4);} + .ewram4 { *(.ewram4) . = ALIGN(4);} + .ewram5 { *(.ewram5) . = ALIGN(4);} + .ewram6 { *(.ewram6) . = ALIGN(4);} + .ewram7 { *(.ewram7) . = ALIGN(4);} + .ewram8 { *(.ewram8) . = ALIGN(4);} + .ewram9 { *(.ewram9) . = ALIGN(4);} + } = 0xff + + __pad_lma = LOADADDR(.ewram0) + SIZEOF(.ewram0)+SIZEOF(.ewram1)+SIZEOF(.ewram2)+SIZEOF(.ewram3)+SIZEOF(.ewram4)+SIZEOF(.ewram5)+SIZEOF(.ewram6)+SIZEOF(.ewram7)+SIZEOF(.ewram8)+SIZEOF(.ewram9); + + /* EZF Advance strips trailing 0xff bytes, add a pad section so nothing important is removed */ + .pad ALIGN(4) : AT (__pad_lma) + { + LONG(0x52416b64) + LONG(0x4d) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + __ewram_overlay_end = . ; + __eheap_start = . ; + + _end = .; + __end__ = _end ; /* v1.3 */ + PROVIDE (end = _end); /* v1.3 */ + + /* 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) } + .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) } + .stack 0x80000 : { _stack = .; *(.stack) } + /* These must appear regardless of . */ +} diff --git a/dka-crtls/ds_arm7.specs b/dka-crtls/ds_arm7.specs new file mode 100644 index 0000000..e91c4cd --- /dev/null +++ b/dka-crtls/ds_arm7.specs @@ -0,0 +1,8 @@ +%rename link old_link + +*link: +%(old_link) -T ds_arm7.ld%s + +*startfile: +ds_arm7_crt0%O%s crti%O%s crtbegin%O%s + diff --git a/dka-crtls/ds_arm7_crt0.S b/dka-crtls/ds_arm7_crt0.S new file mode 100644 index 0000000..f982edd --- /dev/null +++ b/dka-crtls/ds_arm7_crt0.S @@ -0,0 +1,130 @@ +.section ".init" +.global _start + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +.align 4 +.arm + +_start: + mov r0, #0x04000000 @ IME = 0; + add r0, r0, #0x208 + strh r0, [r0] + + mov r0, #0x12 @ Switch to IRQ Mode + msr cpsr, r0 + ldr sp, =__sp_irq @ Set IRQ stack + + mov r0, #0x1F @ Switch to System Mode + msr cpsr, r0 + ldr sp, =__sp_usr @ Set user stack + + ldr r0, =__bss_start @ Clear BSS section to 0x00 + ldr r1, =__bss_end + sub r1, r1, r0 + bl ClearMem + + ldr r1, =__data_lma @ Copy initialized data (data section) from LMA to VMA (ROM to RAM) + ldr r2, =__data_start + ldr r4, =__data_end + bl CopyMemCheck + + ldr r1, =__iwram_lma @ Copy internal work ram (iwram section) from LMA to VMA (ROM to RAM) + ldr r2, =__iwram_start + ldr r4, =__iwram_end + bl CopyMemCheck + + ldr r2, =__load_stop_iwram0 @ Copy internal work ram overlay 0 (iwram0 section) from LMA to VMA (ROM to RAM) + ldr r1, =__load_start_iwram0 + subs r3, r2, r1 @ Is there any data to copy? + beq CIW0Skip @ no + ldr r2, =__iwram_overlay_start + bl CopyMem +CIW0Skip: + ldr r1, =__ewram_lma @ Copy external work ram (ewram section) from LMA to VMA (ROM to RAM) + ldr r2, =__ewram_start + ldr r4, =__ewram_end + bl CopyMemCheck + + ldr r2, =__load_stop_ewram0 @ @ Copy external work ram overlay 0 (ewram0 section) from LMA to VMA (ROM to RAM) + ldr r1, =__load_start_ewram0 + subs r3, r2, r1 @ Is there any data to copy? + beq CEW0Skip @ no + ldr r2, =__ewram_overlay_start + bl CopyMem +CEW0Skip: + ldr r1, =fake_heap_end @ set heap end + ldr r0, =__eheap_end + str r0, [r1] + + ldr r3, =_init @ global constructors + bl _call_via_r3 + + mov r0, #0 @ int argc + mov r1, #0 @ char *argv[] + ldr r3, =main + bl _call_via_r3 @ jump to user code + + @ If the user ever returns, return to flash cartridge + mov r0, #0x08000000 + bx r0 + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Clear memory to 0x00 if length != 0 +@ r0 = Start Address +@ r1 = Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +ClearMem: mov r2, #3 @ Round down to nearest word boundary + add r1, r1, r2 @ Shouldn't be needed + bics r1, r1, r2 @ Clear 2 LSB (and set Z) + bxeq lr @ Quit if copy size is 0 + + mov r2, #0 +ClrLoop: stmia r0!, {r2} + subs r1, r1, #4 + bne ClrLoop + + bx lr + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Copy memory if length != 0 +@ r1 = Source Address +@ r2 = Dest Address +@ r4 = Dest Address + Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +CopyMemCheck: + sub r3, r4, r2 @ Is there any data to copy? + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Copy memory +@ r1 = Source Address +@ r2 = Dest Address +@ r3 = Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +CopyMem: mov r0, #3 @ These commands are used in cases where + add r3, r3, r0 @ the length is not a multiple of 4, + bics r3, r3, r0 @ even though it should be. + bxeq lr @ Length is zero, so exit + +CIDLoop: ldmia r1!, {r0} + stmia r2!, {r0} + subs r3, r3, #4 + bne CIDLoop + + bx lr + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +.align +.pool + +.end diff --git a/dka-crtls/ds_arm7cart.ld b/dka-crtls/ds_arm7cart.ld new file mode 100644 index 0000000..815b3c8 --- /dev/null +++ b/dka-crtls/ds_arm7cart.ld @@ -0,0 +1,294 @@ +/* Linker Script Original v1.3 by Jeff Frohwein */ +/* v1.0 - Original release */ +/* v1.1 - Added proper .data section support */ +/* v1.2 - Added support for c++ & iwram overlays */ +/* - Major contributions by Jason Wilkins. */ +/* v1.3 - .ewram section now can be used when */ +/* compiling for MULTIBOOT mode. This fixes */ +/* malloc() in DevKitAdvance which depends */ +/* on __eheap_start instead of end to define*/ +/* the starting location of heap space. */ +/* External global variable __gba_iwram_heap*/ +/* support added to allow labels end, _end, */ +/* & __end__ to point to end of iwram or */ +/* the end of ewram. */ +/* */ +/* Additions by WinterMute */ +/* v1.4 - .sbss section added for unitialised */ +/* data in ewram */ +/* v1.5 - padding section added to stop EZF */ +/* stripping important data */ +/* Additions by Joat: */ +/* v1.6 - Adapted for the DS */ + +/* This file is released into the public domain */ +/* for commercial or non-commercial use with no */ +/* restrictions placed upon it. */ + +/* NOTE!!!: This linker script defines the RAM & */ +/* ROM start addresses. In order for it to work */ +/* properly, remove -Ttext and -Tbss linker */ +/* options from your makefile if they are */ +/* present. */ + +/* You can use the following to view section */ +/* addresses in your .elf file: */ +/* objdump -h file.elf */ +/* Please note that empty sections may incorrectly*/ +/* list the lma address as the vma address for */ +/* some versions of objdump. */ + +OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +/* SEARCH_DIR(/bin/arm); */ + +/* By default this linker script will generate code */ +/* for flash carts located at 0x8000000. */ + +/* The linker script function "var1 += var2;" sometimes */ +/* reports incorrect values in the *.map file but the */ +/* actual value it calculates is usually, if not always, */ +/* correct. If you leave out the ". = ALIGN(4);" at the */ +/* end of each section then the return value of SIZEOF() */ +/* is sometimes incorrect and "var1 += var2;" appears to */ +/* not work as well. "var1 += var2" style functions are */ +/* avoided below as a result. */ + +/* The linker script MEMORY directive is not used here due */ +/* to the fact that __text_start is not always a fixed value. */ + +__text_start = 0x08000000; +__eheap_end = 0x03802000; +__ewram_start = 0x03800000; +__iwram_start = 0x03802000; +__iheap_end = 0x03810000 - 0x400; +__sp_usr = 0x03810000 - 0x100; +__sp_irq = 0x03810000 - 0x60; +__sp_usr_offset = __sp_usr - __iwram_start; + +SECTIONS +{ + . = __text_start; + .init : + { + KEEP (*(.init)) + . = ALIGN(4); + } =0xff + + .plt : + { + *(.plt) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } + + .text : /* ALIGN (4): */ + { + *(EXCLUDE_FILE (*.iwram*) .text) + *(.text.*) + *(.stub) + /* .gnu.warning sections are handled specially by elf32.em. */ + *(.gnu.warning) + *(.gnu.linkonce.t*) + *(.glue_7) + *(.glue_7t) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + __text_end = .; + .fini : + { + KEEP (*(.fini)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } =0 + + .rodata : + { + *(.rodata) + *all.rodata*(*) + *(.roda) + *(.rodata.*) + *(.gnu.linkonce.r*) + SORT(CONSTRUCTORS) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + .ctors : + { + /* gcc uses crtbegin.o to find the start of the constructors, so + we make sure it is first. Because this is a wildcard, it + doesn't matter if the user does not actually link against + crtbegin.o; the linker won't look for a file to match a + wildcard. The wildcard also means that it doesn't matter which + directory crtbegin.o is in. */ + KEEP (*crtbegin.o(.ctors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors)) + KEEP (*(SORT(.ctors.*))) + KEEP (*(.ctors)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + + .dtors : + { + KEEP (*crtbegin.o(.dtors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors)) + KEEP (*(SORT(.dtors.*))) + KEEP (*(.dtors)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + .jcr : { KEEP (*(.jcr)) } + +/* laddr = ADDR(.init) + SIZEOF(.init) + SIZEOF(.text) + SIZEOF(.fini) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors); +*/ + .eh_frame : + { + KEEP (*(.eh_frame)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + + .gcc_except_table : + { + *(.gcc_except_table) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + __iwram_lma = .; + + .iwram __iwram_start : AT (__iwram_lma) + { + __iwram_start = ABSOLUTE(.) ; + *(.iwram) + *iwram.*(.text) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + __data_lma = __iwram_lma + SIZEOF(.iwram) ; + __iwram_end = . ; + + .bss ALIGN(4) : + { + __bss_start = ABSOLUTE(.); + __bss_start__ = ABSOLUTE(.); + *(.dynbss) + *(.gnu.linkonce.b*) + *(COMMON) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } + + __bss_end = . ; + __bss_end__ = . ; + + .data ALIGN(4) : AT (__data_lma) + { + __data_start = ABSOLUTE(.); + *(.data) + *(.data.*) + *(.gnu.linkonce.d*) + CONSTRUCTORS + } = 0xff + + __iwram_overlay_lma = __data_lma + SIZEOF(.data); + + __data_end = .; + PROVIDE (edata = .); + __iwram_overlay_start = . ; + + OVERLAY : NOCROSSREFS AT (__iwram_overlay_lma) + { + .iwram0 { *(.iwram0) . = ALIGN(4);} + .iwram1 { *(.iwram1) . = ALIGN(4);} + .iwram2 { *(.iwram2) . = ALIGN(4);} + .iwram3 { *(.iwram3) . = ALIGN(4);} + .iwram4 { *(.iwram4) . = ALIGN(4);} + .iwram5 { *(.iwram5) . = ALIGN(4);} + .iwram6 { *(.iwram6) . = ALIGN(4);} + .iwram7 { *(.iwram7) . = ALIGN(4);} + .iwram8 { *(.iwram8) . = ALIGN(4);} + .iwram9 { *(.iwram9) . = ALIGN(4);} + } = 0xff + __ewram_lma = LOADADDR(.iwram0) + SIZEOF(.iwram0)+SIZEOF(.iwram1)+SIZEOF(.iwram2)+SIZEOF(.iwram3)+SIZEOF(.iwram4)+SIZEOF(.iwram5)+SIZEOF(.iwram6)+SIZEOF(.iwram7)+SIZEOF(.iwram8)+SIZEOF(.iwram9); + + __iwram_overlay_end = . ; + __iheap_start = . ; + + .ewram __ewram_start : AT (__ewram_lma) + { + *(.ewram) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + __ewram_overlay_lma = __ewram_lma + SIZEOF(.ewram); + + .sbss ALIGN(4): + { + *(.sbss) + . = ALIGN(4); + } + + __ewram_end = . ; + __ewram_overlay_start = . ; + + OVERLAY ALIGN(4): NOCROSSREFS AT (__ewram_overlay_lma) + { + .ewram0 { *(.ewram0) . = ALIGN(4);} + .ewram1 { *(.ewram1) . = ALIGN(4);} + .ewram2 { *(.ewram2) . = ALIGN(4);} + .ewram3 { *(.ewram3) . = ALIGN(4);} + .ewram4 { *(.ewram4) . = ALIGN(4);} + .ewram5 { *(.ewram5) . = ALIGN(4);} + .ewram6 { *(.ewram6) . = ALIGN(4);} + .ewram7 { *(.ewram7) . = ALIGN(4);} + .ewram8 { *(.ewram8) . = ALIGN(4);} + .ewram9 { *(.ewram9) . = ALIGN(4);} + } = 0xff + + __pad_lma = LOADADDR(.ewram0) + SIZEOF(.ewram0)+SIZEOF(.ewram1)+SIZEOF(.ewram2)+SIZEOF(.ewram3)+SIZEOF(.ewram4)+SIZEOF(.ewram5)+SIZEOF(.ewram6)+SIZEOF(.ewram7)+SIZEOF(.ewram8)+SIZEOF(.ewram9); + + /* EZF Advance strips trailing 0xff bytes, add a pad section so nothing important is removed */ + .pad ALIGN(4) : AT (__pad_lma) + { + LONG(0x52416b64) + LONG(0x4d) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + __ewram_overlay_end = . ; + __eheap_start = . ; + + _end = .; + __end__ = _end ; /* v1.3 */ + PROVIDE (end = _end); /* v1.3 */ + + /* 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) } + .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) } + .stack 0x80000 : { _stack = .; *(.stack) } + /* These must appear regardless of . */ +} diff --git a/dka-crtls/ds_arm7cart.specs b/dka-crtls/ds_arm7cart.specs new file mode 100644 index 0000000..84c87be --- /dev/null +++ b/dka-crtls/ds_arm7cart.specs @@ -0,0 +1,8 @@ +%rename link old_link + +*link: +%(old_link) -T ds_arm7cart.ld%s + +*startfile: +ds_cart_crt0%O%s crti%O%s crtbegin%O%s + diff --git a/dka-crtls/ds_arm9.ld b/dka-crtls/ds_arm9.ld new file mode 100644 index 0000000..56802d8 --- /dev/null +++ b/dka-crtls/ds_arm9.ld @@ -0,0 +1,291 @@ +/* Linker Script Original v1.3 by Jeff Frohwein */ +/* v1.0 - Original release */ +/* v1.1 - Added proper .data section support */ +/* v1.2 - Added support for c++ & iwram overlays */ +/* - Major contributions by Jason Wilkins. */ +/* v1.3 - .ewram section now can be used when */ +/* compiling for MULTIBOOT mode. This fixes */ +/* malloc() in DevKitAdvance which depends */ +/* on __eheap_start instead of end to define*/ +/* the starting location of heap space. */ +/* External global variable __gba_iwram_heap*/ +/* support added to allow labels end, _end, */ +/* & __end__ to point to end of iwram or */ +/* the end of ewram. */ +/* */ +/* Additions by WinterMute */ +/* v1.4 - .sbss section added for unitialised */ +/* data in ewram */ +/* v1.5 - padding section added to stop EZF */ +/* stripping important data */ +/* Additions by Joat: */ +/* v1.6 - Adapted for the DS */ + +/* This file is released into the public domain */ +/* for commercial or non-commercial use with no */ +/* restrictions placed upon it. */ + +/* NOTE!!!: This linker script defines the RAM & */ +/* ROM start addresses. In order for it to work */ +/* properly, remove -Ttext and -Tbss linker */ +/* options from your makefile if they are */ +/* present. */ + +/* You can use the following to view section */ +/* addresses in your .elf file: */ +/* objdump -h file.elf */ +/* Please note that empty sections may incorrectly*/ +/* list the lma address as the vma address for */ +/* some versions of objdump. */ + +OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +/* SEARCH_DIR(/bin/arm); */ + +/* The linker script function "var1 += var2;" sometimes */ +/* reports incorrect values in the *.map file but the */ +/* actual value it calculates is usually, if not always, */ +/* correct. If you leave out the ". = ALIGN(4);" at the */ +/* end of each section then the return value of SIZEOF() */ +/* is sometimes incorrect and "var1 += var2;" appears to */ +/* not work as well. "var1 += var2" style functions are */ +/* avoided below as a result. */ + +/* The linker script MEMORY directive is not used here due */ +/* to the fact that __text_start is not always a fixed value. */ + +__ewram_start = 0x02001000; +__text_start = 0x02004000; +__eheap_end = 0x02380000; +__iwram_start = 0x00800000; +__iheap_end = 0x00804000 - 0x400; +__sp_usr = 0x00804000 - 0x140; +__sp_irq = 0x00804000 - 0x60; +__sp_usr_offset = __sp_usr - __iwram_start; + +SECTIONS +{ + . = __text_start; + .init : + { + KEEP (*(.init)) + . = ALIGN(4); + } =0xff + + .plt : + { + *(.plt) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } + + .text : /* ALIGN (4): */ + { + *(EXCLUDE_FILE (*.iwram*) .text) + *(.text.*) + *(.stub) + /* .gnu.warning sections are handled specially by elf32.em. */ + *(.gnu.warning) + *(.gnu.linkonce.t*) + *(.glue_7) + *(.glue_7t) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + __text_end = .; + .fini : + { + KEEP (*(.fini)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } =0 + + .rodata : + { + *(.rodata) + *all.rodata*(*) + *(.roda) + *(.rodata.*) + *(.gnu.linkonce.r*) + SORT(CONSTRUCTORS) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + .ctors : + { + /* gcc uses crtbegin.o to find the start of the constructors, so + we make sure it is first. Because this is a wildcard, it + doesn't matter if the user does not actually link against + crtbegin.o; the linker won't look for a file to match a + wildcard. The wildcard also means that it doesn't matter which + directory crtbegin.o is in. */ + KEEP (*crtbegin.o(.ctors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors)) + KEEP (*(SORT(.ctors.*))) + KEEP (*(.ctors)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + + .dtors : + { + KEEP (*crtbegin.o(.dtors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors)) + KEEP (*(SORT(.dtors.*))) + KEEP (*(.dtors)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + .jcr : { KEEP (*(.jcr)) } + +/* laddr = ADDR(.init) + SIZEOF(.init) + SIZEOF(.text) + SIZEOF(.fini) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors); +*/ + .eh_frame : + { + KEEP (*(.eh_frame)) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + + .gcc_except_table : + { + *(.gcc_except_table) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0 + __iwram_lma = .; + + .iwram __iwram_start : AT (__iwram_lma) + { + __iwram_start = ABSOLUTE(.) ; + *(.iwram) + *iwram.*(.text) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + __data_lma = __iwram_lma + SIZEOF(.iwram) ; + __iwram_end = . ; + + .bss ALIGN(4) : + { + __bss_start = ABSOLUTE(.); + __bss_start__ = ABSOLUTE(.); + *(.dynbss) + *(.gnu.linkonce.b*) + *(COMMON) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } + + __bss_end = . ; + __bss_end__ = . ; + + .data ALIGN(4) : AT (__data_lma) + { + __data_start = ABSOLUTE(.); + *(.data) + *(.data.*) + *(.gnu.linkonce.d*) + CONSTRUCTORS + } = 0xff + + __iwram_overlay_lma = __data_lma + SIZEOF(.data); + + __data_end = .; + PROVIDE (edata = .); + __iwram_overlay_start = . ; + + OVERLAY : NOCROSSREFS AT (__iwram_overlay_lma) + { + .iwram0 { *(.iwram0) . = ALIGN(4);} + .iwram1 { *(.iwram1) . = ALIGN(4);} + .iwram2 { *(.iwram2) . = ALIGN(4);} + .iwram3 { *(.iwram3) . = ALIGN(4);} + .iwram4 { *(.iwram4) . = ALIGN(4);} + .iwram5 { *(.iwram5) . = ALIGN(4);} + .iwram6 { *(.iwram6) . = ALIGN(4);} + .iwram7 { *(.iwram7) . = ALIGN(4);} + .iwram8 { *(.iwram8) . = ALIGN(4);} + .iwram9 { *(.iwram9) . = ALIGN(4);} + } = 0xff + __ewram_lma = LOADADDR(.iwram0) + SIZEOF(.iwram0)+SIZEOF(.iwram1)+SIZEOF(.iwram2)+SIZEOF(.iwram3)+SIZEOF(.iwram4)+SIZEOF(.iwram5)+SIZEOF(.iwram6)+SIZEOF(.iwram7)+SIZEOF(.iwram8)+SIZEOF(.iwram9); + + __iwram_overlay_end = . ; + __iheap_start = . ; + + .ewram __ewram_start : AT (__ewram_lma) + { + *(.ewram) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + __ewram_overlay_lma = __ewram_lma + SIZEOF(.ewram); + + .sbss ALIGN(4): + { + *(.sbss) + . = ALIGN(4); + } + + __ewram_end = . ; + __ewram_overlay_start = . ; + + OVERLAY ALIGN(4): NOCROSSREFS AT (__ewram_overlay_lma) + { + .ewram0 { *(.ewram0) . = ALIGN(4);} + .ewram1 { *(.ewram1) . = ALIGN(4);} + .ewram2 { *(.ewram2) . = ALIGN(4);} + .ewram3 { *(.ewram3) . = ALIGN(4);} + .ewram4 { *(.ewram4) . = ALIGN(4);} + .ewram5 { *(.ewram5) . = ALIGN(4);} + .ewram6 { *(.ewram6) . = ALIGN(4);} + .ewram7 { *(.ewram7) . = ALIGN(4);} + .ewram8 { *(.ewram8) . = ALIGN(4);} + .ewram9 { *(.ewram9) . = ALIGN(4);} + } = 0xff + + __pad_lma = LOADADDR(.ewram0) + SIZEOF(.ewram0)+SIZEOF(.ewram1)+SIZEOF(.ewram2)+SIZEOF(.ewram3)+SIZEOF(.ewram4)+SIZEOF(.ewram5)+SIZEOF(.ewram6)+SIZEOF(.ewram7)+SIZEOF(.ewram8)+SIZEOF(.ewram9); + + /* EZF Advance strips trailing 0xff bytes, add a pad section so nothing important is removed */ + .pad ALIGN(4) : AT (__pad_lma) + { + LONG(0x52416b64) + LONG(0x4d) + . = ALIGN(4); /* REQUIRED. LD is flaky without it. */ + } = 0xff + + __ewram_overlay_end = . ; + __eheap_start = . ; + + _end = .; + __end__ = _end ; /* v1.3 */ + PROVIDE (end = _end); /* v1.3 */ + + /* 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) } + .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) } + .stack 0x80000 : { _stack = .; *(.stack) } + /* These must appear regardless of . */ +} diff --git a/dka-crtls/ds_arm9.specs b/dka-crtls/ds_arm9.specs new file mode 100644 index 0000000..8f1d5bf --- /dev/null +++ b/dka-crtls/ds_arm9.specs @@ -0,0 +1,8 @@ +%rename link old_link + +*link: +%(old_link) -T ds_arm9.ld%s + +*startfile: +ds_arm9_crt0%O%s crti%O%s crtbegin%O%s + diff --git a/dka-crtls/ds_arm9_crt0.S b/dka-crtls/ds_arm9_crt0.S new file mode 100644 index 0000000..609c7cd --- /dev/null +++ b/dka-crtls/ds_arm9_crt0.S @@ -0,0 +1,143 @@ +.section ".init" +.global _start + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +.align 4 +.arm + +_start: + mov r0, #0x04000000 @ IME = 0; + add r0, r0, #0x208 + strh r0, [r0] + + ldr r1, =0x00002078 @ disable DTCM and protection unit + mcr p15, 0, r1, c1, c0 + + ldr r0, =0x0080000A + mcr p15, 0, r0, c9, c1 @ TCM base = 0x00800*4096, size = 16 KB + mrc p15, 0, r0, c1, c0 @ throw-away read of cp15.c1 + orr r1, r1, #0x10000 + mcr p15, 0, r1, c1, c0 @ cp15.c1 = 0x00012078; + + mov r0, #0x12 @ Switch to IRQ Mode + msr cpsr, r0 + ldr sp, =__sp_irq @ Set IRQ stack + + mov r0, #0x1F @ Switch to System Mode + msr cpsr, r0 + ldr sp, =__sp_usr @ Set user stack + + ldr r0, =__bss_start @ Clear BSS section to 0x00 + ldr r1, =__bss_end + sub r1, r1, r0 + bl ClearMem + + ldr r1, =__data_lma @ Copy initialized data (data section) from LMA to VMA (ROM to RAM) + ldr r2, =__data_start + ldr r4, =__data_end + bl CopyMemCheck + + ldr r1, =__iwram_lma @ Copy internal work ram (iwram section) from LMA to VMA (ROM to RAM) + ldr r2, =__iwram_start + ldr r4, =__iwram_end + bl CopyMemCheck + + ldr r2, =__load_stop_iwram0 @ Copy internal work ram overlay 0 (iwram0 section) from LMA to VMA (ROM to RAM) + ldr r1, =__load_start_iwram0 + subs r3, r2, r1 @ Is there any data to copy? + beq CIW0Skip @ no + ldr r2, =__iwram_overlay_start + bl CopyMem +CIW0Skip: + ldr r1, =__ewram_lma @ Copy external work ram (ewram section) from LMA to VMA (ROM to RAM) + ldr r2, =__ewram_start + ldr r4, =__ewram_end + bl CopyMemCheck + + ldr r2, =__load_stop_ewram0 @ @ Copy external work ram overlay 0 (ewram0 section) from LMA to VMA (ROM to RAM) + ldr r1, =__load_start_ewram0 + subs r3, r2, r1 @ Is there any data to copy? + beq CEW0Skip @ no + ldr r2, =__ewram_overlay_start + bl CopyMem +CEW0Skip: + ldr r1, =fake_heap_end @ set heap end + ldr r0, =__eheap_end + str r0, [r1] + + ldr r3, =_init @ global constructors + bl _call_via_r3 + + mov r0, #0 @ int argc + mov r1, #0 @ char *argv[] + ldr r3, =main + bl _call_via_r3 @ jump to user code + + @ If the user ever returns, go to an infinte loop + ldr r0, =ILoop + ldr r0, [r0] + ldr r1, =0x027FFE78 + str r0, [r1] + bx r1 +ILoop: b ILoop + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Clear memory to 0x00 if length != 0 +@ r0 = Start Address +@ r1 = Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +ClearMem: mov r2, #3 @ Round down to nearest word boundary + add r1, r1, r2 @ Shouldn't be needed + bics r1, r1, r2 @ Clear 2 LSB (and set Z) + bxeq lr @ Quit if copy size is 0 + + mov r2, #0 +ClrLoop: stmia r0!, {r2} + subs r1, r1, #4 + bne ClrLoop + + bx lr + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Copy memory if length != 0 +@ r1 = Source Address +@ r2 = Dest Address +@ r4 = Dest Address + Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +CopyMemCheck: + sub r3, r4, r2 @ Is there any data to copy? + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Copy memory +@ r1 = Source Address +@ r2 = Dest Address +@ r3 = Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +CopyMem: mov r0, #3 @ These commands are used in cases where + add r3, r3, r0 @ the length is not a multiple of 4, + bics r3, r3, r0 @ even though it should be. + bxeq lr @ Length is zero, so exit + +CIDLoop: ldmia r1!, {r0} + stmia r2!, {r0} + subs r3, r3, #4 + bne CIDLoop + + bx lr + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +.align +.pool + +.end diff --git a/dka-crtls/ds_cart_crt0.S b/dka-crtls/ds_cart_crt0.S new file mode 100644 index 0000000..ffeeb0c --- /dev/null +++ b/dka-crtls/ds_cart_crt0.S @@ -0,0 +1,173 @@ +.section ".init" +.global _start +.align + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +.arm + +_start: + b rom_header_end + + .fill 156,1,0 @ Nintendo Logo Character Data (8000004h) + .fill 16,1,0 @ Game Title + .byte 0x30,0x31 @ Maker Code (80000B0h) + .byte 0x96 @ Fixed Value (80000B2h) + .byte 0x00 @ Main Unit Code (80000B3h) + .byte 0x00 @ Device Type (80000B4h) + .fill 7,1,0 @ unused + .byte 0x00 @ Software Version No (80000BCh) + .byte 0xf0 @ Complement Check (80000BDh) + .byte 0x00,0x00 @ Checksum (80000BEh) + +rom_header_end: + b start_vector @ This branch must be here for proper + @ positioning of the following header. + + .GLOBAL __boot_method, __slave_number +__boot_method: + .byte 0 @ boot method (0=ROM boot, 3=Multiplay boot) +__slave_number: + .byte 0 @ slave # (1=slave#1, 2=slave#2, 3=slave#3) + + .byte 0 @ reserved + .byte 0 @ reserved + .word 0 @ reserved + .word 0 @ reserved + .word 0 @ reserved + .word 0 @ reserved + .word 0 @ reserved + .word 0 @ reserved + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +.align 4 +.arm + +start_vector: + mov r0, #0x04000000 @ IME = 0; + add r0, r0, #0x208 + strh r0, [r0] + + mov r0, #0x12 @ Switch to IRQ Mode + msr cpsr, r0 + ldr sp, =__sp_irq @ Set IRQ stack + mov r0, #0x1F @ Switch to System Mode + msr cpsr, r0 + ldr sp, =__sp_usr @ Set user stack + + mov r1, #0x42 + strb r1, [r7], #1 + mov r1, #0x35 + strb r1, [r7], #1 + mov r1, #0x2B + strb r1, [r7], #1 + mov r1, #0x2B + strb r1, [r7], #1 + + ldr r0, =__bss_start @ Clear BSS section to 0x00 + ldr r1, =__bss_end + sub r1, r1, r0 + bl ClearMem + + ldr r1, =__data_lma @ Copy initialized data (data section) from LMA to VMA (ROM to RAM) + ldr r2, =__data_start + ldr r4, =__data_end + bl CopyMemChk + + ldr r1, =__iwram_lma @ Copy internal work ram (iwram section) from LMA to VMA (ROM to RAM) + ldr r2, =__iwram_start + ldr r4, =__iwram_end + bl CopyMemChk + + ldr r2, =__load_stop_iwram0 @ Copy internal work ram overlay 0 (iwram0 section) from LMA to VMA (ROM to RAM) + ldr r1, =__load_start_iwram0 + subs r3, r2, r1 @ Is there any data to copy? + beq CIW0Skip @ no + ldr r2, =__iwram_overlay_start + bl CopyMem +CIW0Skip: + ldr r1, =__ewram_lma @ Copy external work ram (ewram section) from LMA to VMA (ROM to RAM) + ldr r2, =__ewram_start + ldr r4, =__ewram_end + bl CopyMemChk + + ldr r2, =__load_stop_ewram0 @ @ Copy external work ram overlay 0 (ewram0 section) from LMA to VMA (ROM to RAM) + ldr r1, =__load_start_ewram0 + subs r3, r2, r1 @ Is there any data to copy? + beq CEW0Skip @ no + ldr r2, =__ewram_overlay_start + bl CopyMem +CEW0Skip: + ldr r1, =fake_heap_end @ set heap end + ldr r0, =__eheap_end + str r0, [r1] + + ldr r3, =_init @ global constructors + bl _call_via_r3 + + mov r0, #0 @ int argc + mov r1, #0 @ char *argv[] + ldr r3, =main + bl _call_via_r3 @ jump to user code + + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Clear memory to 0x00 if length != 0 +@ r0 = Start Address +@ r1 = Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +ClearMem: mov r2, #3 @ Round down to nearest word boundary + add r1, r1, r2 @ Shouldn't be needed + bics r1, r1, r2 @ Clear 2 LSB (and set Z) + bxeq lr @ Quit if copy size is 0 + + mov r2, #0 +ClrLoop: stmia r0!, {r2} + subs r1, r1, #4 + bne ClrLoop + + bx lr + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Copy memory if length != 0 +@ r1 = Source Address +@ r2 = Dest Address +@ r4 = Dest Address + Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +CopyMemChk: sub r3, r4, r2 @ Is there any data to copy? + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +@ +@ Copy memory +@ r1 = Source Address +@ r2 = Dest Address +@ r3 = Length +@ +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +CopyMem: mov r0, #3 @ These commands are used in cases where + add r3, r3, r0 @ the length is not a multiple of 4, + bics r3, r3, r0 @ even though it should be. + bxeq lr @ Length is zero so exit + +CIDLoop: ldmia r1!, {r0} + stmia r2!, {r0} + subs r3, r3, #4 + bne CIDLoop + + bx lr + +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + +.align +.pool + +.end + diff --git a/dka-scripts/build-crtls.sh b/dka-scripts/build-crtls.sh index ac71ddf..aeae73d 100644 --- a/dka-scripts/build-crtls.sh +++ b/dka-scripts/build-crtls.sh @@ -12,3 +12,6 @@ $MAKE CRT=gba_crt0 $MAKE CRT=gp32_crt0 $MAKE CRT=er_crt0 $MAKE CRT=gp32_gpsdk_crt0 +$MAKE CRT=ds_arm7_crt0 +$MAKE CRT=ds_arm9_crt0 +$MAKE CRT=ds_cart_crt0