mirror of
https://github.com/coderkei/akmenu-next.git
synced 2025-06-18 08:55:46 -04:00
arm7: load directly to IWRAM and only IWRAM
Small modification to the linkerscript to stay in 0x03800000. This may break a few loaders but that's okay, nobody should be booting this directly.
This commit is contained in:
lifehackerhansol
parent
fa9e4afefc
commit
8cada4d83d
@ -28,7 +28,7 @@ CFLAGS := -g -Wall -O3\
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$(ARCH) $(INCLUDE) -DARM7
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CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions
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ASFLAGS := -g $(ARCH)
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LDFLAGS = -specs=ds_arm7.specs -g $(ARCH) -Wl,--nmagic -Wl,-Map,$(notdir $*).map
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LDFLAGS = -specs=../ds_arm7_iwram.specs -g $(ARCH) -Wl,--nmagic -Wl,-Map,$(notdir $*).map
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LIBS := -ldswifi7 -lmm7 -lnds7
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192
arm7/ds_arm7_iwram.ld
Normal file
192
arm7/ds_arm7_iwram.ld
Normal file
@ -0,0 +1,192 @@
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/*--------------------------------------------------------------------------------
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This Source Code Form is subject to the terms of the Mozilla Public License,
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v. 2.0. If a copy of the MPL was not distributed with this file, You can
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obtain one at https://mozilla.org/MPL/2.0/.
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--------------------------------------------------------------------------------*/
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OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
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OUTPUT_ARCH(arm)
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ENTRY(_start)
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MEMORY {
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rom : ORIGIN = 0x08000000, LENGTH = 32M
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iwram : ORIGIN = 0x03800000, LENGTH = 64K
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}
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__iwram_start = ORIGIN(iwram);
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__iwram_top = ORIGIN(iwram)+ LENGTH(iwram);
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__sp_irq = __iwram_top - 0x100;
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__sp_svc = __sp_irq - 0x100;
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__sp_usr = __sp_svc - 0x100;
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__irq_flags = 0x04000000 - 8;
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__irq_flagsaux = 0x04000000 - 0x40;
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__irq_vector = 0x04000000 - 4;
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SECTIONS
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{
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.crt0 :
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{
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__text_start = . ;
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KEEP (*(.crt0))
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. = ALIGN(4); /* REQUIRED. LD is flaky without it. */
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} >iwram = 0xff
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.init :
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{
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KEEP (*(SORT_NONE(.init)))
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} >iwram = 0xff
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.plt : { *(.plt) } >iwram = 0xff
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.text : /* ALIGN (4): */
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{
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*(.text .stub .text.* .gnu.linkonce.t.*)
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KEEP (*(.text.*personality*))
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/* .gnu.warning sections are handled specially by elf32.em. */
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*(.gnu.warning)
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*(.glue_7t) *(.glue_7) *(.vfp11_veneer)
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. = ALIGN(4); /* REQUIRED. LD is flaky without it. */
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} >iwram = 0xff
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.fini :
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{
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KEEP (*(.fini))
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} >iwram =0xff
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__text_end = . ;
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.rodata :
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{
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*(.rodata)
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*all.rodata*(*)
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*(.roda)
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*(.rodata.*)
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*(.gnu.linkonce.r*)
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SORT(CONSTRUCTORS)
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. = ALIGN(4); /* REQUIRED. LD is flaky without it. */
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} >iwram = 0xff
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.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >iwram
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__exidx_start = .;
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.ARM.exidx : { *(.ARM.exidx* .gnu.linkonce.armexidx.*) } >iwram
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__exidx_end = .;
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/* Ensure the __preinit_array_start label is properly aligned. We
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could instead move the label definition inside the section, but
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the linker would then create the section even if it turns out to
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be empty, which isn't pretty. */
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. = ALIGN(32 / 8);
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PROVIDE (__preinit_array_start = .);
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.preinit_array : { KEEP (*(.preinit_array)) } >iwram = 0xff
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PROVIDE (__preinit_array_end = .);
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PROVIDE (__init_array_start = .);
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.init_array : { KEEP (*(.init_array)) } >iwram = 0xff
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PROVIDE (__init_array_end = .);
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PROVIDE (__fini_array_start = .);
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.fini_array : { KEEP (*(.fini_array)) } >iwram = 0xff
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PROVIDE (__fini_array_end = .);
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.ctors :
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{
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/* gcc uses crtbegin.o to find the start of the constructors, so
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we make sure it is first. Because this is a wildcard, it
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doesn't matter if the user does not actually link against
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crtbegin.o; the linker won't look for a file to match a
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wildcard. The wildcard also means that it doesn't matter which
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directory crtbegin.o is in. */
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KEEP (*crtbegin.o(.ctors))
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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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. = ALIGN(4); /* REQUIRED. LD is flaky without it. */
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} >iwram = 0xff
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.dtors :
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{
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KEEP (*crtbegin.o(.dtors))
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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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. = ALIGN(4); /* REQUIRED. LD is flaky without it. */
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} >iwram = 0xff
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.eh_frame :
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{
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KEEP (*(.eh_frame))
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. = ALIGN(4); /* REQUIRED. LD is flaky without it. */
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} >iwram = 0xff
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.gcc_except_table :
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{
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*(.gcc_except_table)
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. = ALIGN(4); /* REQUIRED. LD is flaky without it. */
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} >iwram = 0xff
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.jcr : { KEEP (*(.jcr)) } >iwram = 0
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.got : { *(.got.plt) *(.got) } >iwram = 0
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.data ALIGN(4) : {
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__data_start = ABSOLUTE(.);
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*(.data)
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*(.data.*)
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*(.gnu.linkonce.d*)
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CONSTRUCTORS
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. = ALIGN(4);
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__data_end = ABSOLUTE(.) ;
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} >iwram = 0xff
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__arm7_end__ = .;
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.bss ALIGN(4) :
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{
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__bss_start = ABSOLUTE(.);
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__bss_start__ = ABSOLUTE(.);
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*(.dynbss)
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*(.gnu.linkonce.b*)
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*(.bss*)
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*(COMMON)
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. = ALIGN(4); /* REQUIRED. LD is flaky without it. */
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__bss_end__ = ABSOLUTE(.);
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__end__ = ABSOLUTE(.);
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} >iwram
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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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/* DWARF debug sections.
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Symbols in the DWARF debugging sections are relative to the beginning
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of the section so we begin them at 0. */
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/* DWARF 1 */
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.debug 0 : { *(.debug) }
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.line 0 : { *(.line) }
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/* GNU DWARF 1 extensions */
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.debug_srcinfo 0 : { *(.debug_srcinfo) }
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.debug_sfnames 0 : { *(.debug_sfnames) }
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/* DWARF 1.1 and DWARF 2 */
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.debug_aranges 0 : { *(.debug_aranges) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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/* DWARF 2 */
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.debug_info 0 : { *(.debug_info) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_line 0 : { *(.debug_line) }
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.debug_frame 0 : { *(.debug_frame) }
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.debug_str 0 : { *(.debug_str) }
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.debug_loc 0 : { *(.debug_loc) }
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.debug_macinfo 0 : { *(.debug_macinfo) }
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/* SGI/MIPS DWARF 2 extensions */
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.debug_weaknames 0 : { *(.debug_weaknames) }
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.debug_funcnames 0 : { *(.debug_funcnames) }
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.debug_typenames 0 : { *(.debug_typenames) }
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.debug_varnames 0 : { *(.debug_varnames) }
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.stack 0x80000 : { _stack = .; *(.stack) }
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/* These must appear regardless of . */
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}
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7
arm7/ds_arm7_iwram.specs
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7
arm7/ds_arm7_iwram.specs
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@ -0,0 +1,7 @@
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%include <sync-none.specs>
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*link:
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+ -T../ds_arm7_iwram.ld%s --no-warn-rwx-segments
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*startfile:
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ds_arm7_vram_crt0%O%s crti%O%s crtbegin%O%s
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