diff --git a/exosphere/linker.ld b/exosphere/linker.ld index af74fd16e..0999720ba 100644 --- a/exosphere/linker.ld +++ b/exosphere/linker.ld @@ -1,16 +1,241 @@ +OUTPUT_ARCH(aarch64) ENTRY(__start_cold) + +MEMORY +{ + fake : ORIGIN = 0, LENGTH = 4096M + tzram : ORIGIN = 0x07C010000, LENGTH = 64K + /* + The warmboot crt0 is preceeded by the exception vector page and the L2 and L3 translation tables. + Normally the main code immediately follows the warmboot crt0, aligned to 256 bytes. + We can't ensure or replicate that behavior properly so we'll just give 2K to the warmboot crt0. + */ + warmboot_crt0 : ORIGIN = ORIGIN(tzram) + 12K, LENGTH = 2K + + /* 8K are the MMU L2 and L3 tables & 2K from the evt page */ + main : ORIGIN = 0x1F01E0000 + LENGTH(warmboot_crt0), LENGTH = LENGTH(tzram) - LENGTH(pk2ldr) - LENGTH(evt) - LENGTH(warmboot_crt0) - 10K + pk2ldr : ORIGIN = ORIGIN(main) - LENGTH(warmboot_crt0) + LENGTH(tzram), LENGTH = 8K + /* The first half of the page are exception entry stacks, the other half are the vectors themselves */ + evt : ORIGIN = ORIGIN(pk2ldr) + 40K + 2K, LENGTH = 2K +} + SECTIONS { - /* DUMMY LINKER SCRIPT, REPLACE ASAP */ - . = 0xF0000000; - - __start__ = ABSOLUTE(.); + PROVIDE(__start__ = 0x0); + . = __start__; - .text : ALIGN(4) { *(.text*); . = ALIGN(4); } - .rodata : ALIGN(4) { *(.rodata*); . = ALIGN(4); } - .data : ALIGN(4) { *(.data*); . = ALIGN(8); *(.bss* COMMON); . = ALIGN(8); } + .cold_crt0 : + { + . = ALIGN(64); + KEEP (*(.cold_crt0.text*)) + KEEP (build/coldboot_init.o(.text*)) + *(.cold_crt0.rodata*) + build/coldboot_init.o(.rodata*) + *(.cold_crt0.data*) + build/coldboot_init.o(.data*) + . = ALIGN(8); + *(.cold_crt0.bss*) + build/coldboot_init.o(.bss*) + . = ALIGN(64); + } >fake AT>fake - . = ALIGN(4); + .warm_crt0 : + { + . = ALIGN(64); + KEEP (*(.warm_crt0.text*)) + KEEP (build/warmboot_init.o(.text*)) + *(.warm_crt0.rodata*) + build/warmboot_init.o(.rodata*) + *(.warm_crt0.data*) + build/warmboot_init.o(.data*) + . = ALIGN(8); + *(.warm_crt0.bss*) + build/warmboot_init.o(.bss*) + . = ALIGN(64); + } >warmboot_crt0 AT>fake - __end__ = ABSOLUTE(.); + .pk2ldr : + { + . = ALIGN(4096); + KEEP (build/package2.o(.text*)) + build/package2.o(.rodata*) + build/package2.o(.data*) + . = ALIGN(8); + build/package2.o(.bss*) + . = ALIGN(16); + } >pk2ldr AT>fake + + .vectors : + { + . = ALIGN(2048); + KEEP (*(.vectors*)) + . = ALIGN(16); + } >evt AT>fake + + .init : + { + KEEP( *(.init) ) + . = ALIGN(8); + } >main AT>fake + + .plt : + { + *(.plt) + *(.iplt) + . = ALIGN(8); + } >main AT>fake + + .text : + { + *(.text.unlikely .text.*_unlikely .text.unlikely.*) + *(.text.exit .text.exit.*) + *(.text.startup .text.startup.*) + *(.text.hot .text.hot.*) + *(.text .stub .text.* .gnu.linkonce.t.*) + . = ALIGN(8); + } >main AT>fake + + .fini : + { + KEEP( *(.fini) ) + . = ALIGN(8); + } >main AT>fake + + .rodata : + { + *(.rodata .rodata.* .gnu.linkonce.r.*) + SORT(CONSTRUCTORS) + . = ALIGN(8); + } >main AT>fake + + .got : { __got_start__ = .; *(.got) *(.igot) } >main AT>fake + .got.plt : { *(.got.plt) *(.igot.plt) __got_end__ = .;} >main AT>fake + + .preinit_array : + { + . = ALIGN(8); + PROVIDE (__preinit_array_start = .); + KEEP (*(.preinit_array)) + PROVIDE (__preinit_array_end = .); + . = ALIGN(8); + } >main AT>fake + + .init_array : + { + PROVIDE (__init_array_start = .); + KEEP (*(SORT(.init_array.*))) + KEEP (*(.init_array)) + PROVIDE (__init_array_end = .); + } >main AT>fake + + .fini_array : + { + . = ALIGN(8); + PROVIDE (__fini_array_start = .); + KEEP (*(.fini_array)) + KEEP (*(SORT(.fini_array.*))) + PROVIDE (__fini_array_end = .); + . = ALIGN(8); + } >main AT>fake + + .ctors : + { + . = ALIGN(8); + KEEP (*crtbegin.o(.ctors)) /* MUST be first -- GCC requires it */ + KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors)) + KEEP (*(SORT(.ctors.*))) + KEEP (*(.ctors)) + . = ALIGN(8); + } >main AT>fake + + .dtors ALIGN(8) : + { + . = ALIGN(8); + KEEP (*crtbegin.o(.dtors)) + KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors)) + KEEP (*(SORT(.dtors.*))) + KEEP (*(.dtors)) + . = ALIGN(8); + } >main AT>fake + + .data ALIGN(8) : + { + *(.data .data.* .gnu.linkonce.d.*) + CONSTRUCTORS + . = ALIGN(8); + /* + We're too lazy to clear BSS so we integrate it into .data. + Nintendo does the same for this main segment's BSS. + */ + __bss_start__ = .; + *(.dynbss) + *(.bss .bss.* .gnu.linkonce.b.*) + *(COMMON) + . = ALIGN(8); + __bss_end__ = .; + } >main AT>fake + + + .eh_frame_hdr : { *(.eh_frame_hdr) *(.eh_frame_entry .eh_frame_entry.*) } >main AT>fake + .eh_frame : { KEEP (*(.eh_frame)) *(.eh_frame.*) } >main AT>fake + .gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) } >main AT>fake + .gnu_extab : { *(.gnu_extab*) } >main AT>fake + .exception_ranges : { *(.exception_ranges .exception_ranges*) } >main AT>fake + + .dynamic : { *(.dynamic) } >main AT>fake + .interp : { *(.interp) } >main AT>fake + .note.gnu.build-id : { *(.note.gnu.build-id) } >main AT>fake + .hash : { *(.hash) } >main AT>fake + .gnu.hash : { *(.gnu.hash) } >main AT>fake + .gnu.version : { *(.gnu.version) } >main AT>fake + .gnu.version_d : { *(.gnu.version_d) } >main AT>fake + .gnu.version_r : { *(.gnu.version_r) } >main AT>fake + .dynsym : { *(.dynsym) } >main AT>fake + .dynstr : { *(.dynstr) } >main AT>fake + .rela.dyn : { *(.rela.*) } >main AT>fake + + __end__ = ABSOLUTE(.) ; + + . = ALIGN(0x1000); + __argdata__ = ABSOLUTE(.) ; + + /* ================== + ==== Metadata ==== + ================== */ + + /* Discard sections that difficult post-processing */ + /DISCARD/ : { *(.group .comment .note) } + + /* 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) } + + /* 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) } } diff --git a/exosphere/src/start.s b/exosphere/src/start.s index d1a611ecb..d22c83e41 100644 --- a/exosphere/src/start.s +++ b/exosphere/src/start.s @@ -64,7 +64,7 @@ .endm .align 6 -.section .text.cold.start, "ax", %progbits +.section .cold_crt0.text.start, "ax", %progbits .global __start_cold __start_cold: ERRATUM_INVALIDATE_BTB_AT_BOOT @@ -77,7 +77,7 @@ __start_cold: br x16 .align 6 -.section .text.warm.start, "ax", %progbits +.section .warm_crt0.text.start, "ax", %progbits .global __start_warm __start_warm: ERRATUM_INVALIDATE_BTB_AT_BOOT @@ -90,6 +90,7 @@ __start_warm: ldr x16, =__jump_to_main_warm br x16 +.align 4 .section .text.__jump_to_main_cold, "ax", %progbits __jump_to_main_cold: bl __set_exception_entry_stack_pointer