diff --git a/src/link/link.ld b/src/link/link.ld index a73e4cb..1c7434f 100644 --- a/src/link/link.ld +++ b/src/link/link.ld @@ -1,3 +1,12 @@ +/* Specify the memory areas */ +MEMORY +{ + rom : ORIGIN = 0xBFC00000, LENGTH = 0x00002000 /* 8K */ + ram : ORIGIN = 0x40000000, LENGTH = 0x04000000 /* 64M */ + flash : ORIGIN = 0x00000000, LENGTH = 0x00800000 /* 8M */ + io : ORIGIN = 0xA0000000, LENGTH = 0x00800000 /* 8M */ +} + stack_ptr = 0x7FFFEFF0; STARTUP(startup.o) @@ -5,205 +14,199 @@ INPUT(kernel.o) SECTIONS { - /* Read-only sections, merged into text segment: */ - PROVIDE (__executable_start = 0x40000000); . = 0x40000000; - .start __executable_start : - { - start = ALIGN(2); - entry = ALIGN(2); - _entry = ALIGN(2); - __entry = ALIGN(2); - *(.start) - } - /* Kernel text with low-level exception handler */ - .exc_vector __executable_start + 0x080 : - { - _exc_vect_start = .; - *(.exc_vect) - _exc_vect_end = .; - } - .init : - { - KEEP (*(.init)) - } =0 - .plt : { *(.plt) } - .text : - { - _ftext = . ; - *(.text .stub .text.* .gnu.linkonce.t.*) - /* .gnu.warning sections are handled specially by elf32.em. */ - *(.gnu.warning) - *(.mips16.fn.*) *(.mips16.call.*) - } =0 - .fini : - { - KEEP (*(.fini)) - } =0 - PROVIDE (__etext = .); - PROVIDE (_etext = .); - PROVIDE (etext = .); - .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) } - .rodata1 : { *(.rodata1) } - .sdata2 : - { - *(.sdata2 .sdata2.* .gnu.linkonce.s2.*) - } - .sbss2 : { *(.sbss2 .sbss2.* .gnu.linkonce.sb2.*) } - .eh_frame_hdr : { *(.eh_frame_hdr) } - .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) } - .gcc_except_table : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) } - /* Adjust the address for the data segment. We want to adjust up to - the same address within the page on the next page up. */ - . = ALIGN (CONSTANT (MAXPAGESIZE)) - ((CONSTANT (MAXPAGESIZE) - .) & (CONSTANT (MAXPAGESIZE) - 1)); . = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE)); - /* Exception handling */ - .eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) } - .gcc_except_table : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) } - /* Thread Local Storage sections */ - .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) } - .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) } - .preinit_array : - { - PROVIDE_HIDDEN (__preinit_array_start = .); - KEEP (*(.preinit_array)) - PROVIDE_HIDDEN (__preinit_array_end = .); - } - .init_array : - { - PROVIDE_HIDDEN (__init_array_start = .); - KEEP (*(SORT(.init_array.*))) - KEEP (*(.init_array)) - PROVIDE_HIDDEN (__init_array_end = .); - } - .fini_array : - { - PROVIDE_HIDDEN (__fini_array_start = .); - KEEP (*(.fini_array)) - KEEP (*(SORT(.fini_array.*))) - PROVIDE_HIDDEN (__fini_array_end = .); - } - .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 (*crtbegin?.o(.ctors)) - /* We don't want to include the .ctor section from - the crtend.o file until after the sorted ctors. - The .ctor section from the crtend file contains the - end of ctors marker and it must be last */ - KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors)) - KEEP (*(SORT(.ctors.*))) - KEEP (*(.ctors)) - } - .dtors : - { - KEEP (*crtbegin.o(.dtors)) - KEEP (*crtbegin?.o(.dtors)) - KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors)) - KEEP (*(SORT(.dtors.*))) - KEEP (*(.dtors)) - } - .jcr : { KEEP (*(.jcr)) } - .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) } - . = DATA_SEGMENT_RELRO_END (0, .); - .data : - { - _fdata = . ; - *(.data .data.* .gnu.linkonce.d.*) - SORT(CONSTRUCTORS) - } - .data1 : { *(.data1) } - .got.plt : { *(.got.plt) } - . = .; - _gp = ALIGN(16) + 0x7ff0; - .got : { *(.got) } - /* We want the small data sections together, so single-instruction offsets - can access them all, and initialized data all before uninitialized, so - we can shorten the on-disk segment size. */ - .sdata : - { - *(.sdata .sdata.* .gnu.linkonce.s.*) - } - .lit8 : { *(.lit8) } - .lit4 : { *(.lit4) } - _edata = .; PROVIDE (edata = .); - __bss_start = .; - _fbss = .; - .sbss : - { - *(.dynsbss) - *(.sbss .sbss.* .gnu.linkonce.sb.*) - *(.scommon) - } - .bss : - { - *(.dynbss) - *(.bss .bss.* .gnu.linkonce.b.*) - *(COMMON) - /* Align here to ensure that the .bss section occupies space up to - _end. Align after .bss to ensure correct alignment even if the - .bss section disappears because there are no input sections. - FIXME: Why do we need it? When there is no .bss section, we don't - pad the .data section. */ - . = ALIGN(. != 0 ? 32 / 8 : 1); - } - . = ALIGN(32 / 8); - . = ALIGN(32 / 8); - _end = .; PROVIDE (end = .); - . = DATA_SEGMENT_END (.); - /* 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) } - /* DWARF 3 */ - .debug_pubtypes 0 : { *(.debug_pubtypes) } - .debug_ranges 0 : { *(.debug_ranges) } - .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) } - .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) } - .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) } - .mdebug.abi32 : { KEEP(*(.mdebug.abi32)) } - .mdebug.abiN32 : { KEEP(*(.mdebug.abiN32)) } - .mdebug.abi64 : { KEEP(*(.mdebug.abi64)) } - .mdebug.abiO64 : { KEEP(*(.mdebug.abiO64)) } - .mdebug.eabi32 : { KEEP(*(.mdebug.eabi32)) } - .mdebug.eabi64 : { KEEP(*(.mdebug.eabi64)) } - .gcc_compiled_long32 : { KEEP(*(.gcc_compiled_long32)) } - .gcc_compiled_long64 : { KEEP(*(.gcc_compiled_long64)) } - /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) } + .start : + { + start = ALIGN(2); + entry = ALIGN(2); + _entry = ALIGN(2); + __entry = ALIGN(2); + *(.start) + } >ram + + .exc_vector ORIGIN(ram) + 0x80 : + { + *(.exc_vect) + } >ram + .init : + { + KEEP (*(.init)) + } >ram + .text : + { + _ftext = . ; + *(.text .stub .text.* .gnu.linkonce.t.*) + *(.gnu.warning) + *(.mips16.fn.*) *(.mips16.call.*) + } >ram + .fini : + { + KEEP (*(.fini)) + } >ram + PROVIDE (__etext = .); + PROVIDE (_etext = .); + PROVIDE (etext = .); + .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) } >ram + .rodata1 : { *(.rodata1) } >ram + .sdata2 : + { + *(.sdata2 .sdata2.* .gnu.linkonce.s2.*) + } >ram + .sbss2 : { *(.sbss2 .sbss2.* .gnu.linkonce.sb2.*) } >ram + .eh_frame_hdr : { *(.eh_frame_hdr) } >ram + .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) } >ram + .gcc_except_table : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) } + /* Adjust the address for the data segment. We want to adjust up to + the same address within the page on the next page up. */ + . = ALIGN (CONSTANT (MAXPAGESIZE)) - ((CONSTANT (MAXPAGESIZE) - .) & (CONSTANT (MAXPAGESIZE) - 1)); . = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE)); + /* Exception handling */ + .eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) } >ram + .gcc_except_table : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) } >ram + /* Thread Local Storage sections */ + .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) } >ram + .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) } >ram + .preinit_array : + { + PROVIDE_HIDDEN (__preinit_array_start = .); + KEEP (*(.preinit_array)) + PROVIDE_HIDDEN (__preinit_array_end = .); + } >ram + .init_array : + { + PROVIDE_HIDDEN (__init_array_start = .); + KEEP (*(SORT(.init_array.*))) + KEEP (*(.init_array)) + PROVIDE_HIDDEN (__init_array_end = .); + } >ram + .fini_array : + { + PROVIDE_HIDDEN (__fini_array_start = .); + KEEP (*(.fini_array)) + KEEP (*(SORT(.fini_array.*))) + PROVIDE_HIDDEN (__fini_array_end = .); + } >ram + .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 (*crtbegin?.o(.ctors)) + /* We don't want to include the .ctor section from + the crtend.o file until after the sorted ctors. + The .ctor section from the crtend file contains the + end of ctors marker and it must be last */ + KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors)) + KEEP (*(SORT(.ctors.*))) + KEEP (*(.ctors)) + } >ram + .dtors : + { + KEEP (*crtbegin.o(.dtors)) + KEEP (*crtbegin?.o(.dtors)) + KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors)) + KEEP (*(SORT(.dtors.*))) + KEEP (*(.dtors)) + } >ram + .jcr : { KEEP (*(.jcr)) } >ram + .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) } >ram + . = DATA_SEGMENT_RELRO_END (0, .); + .data : + { + _fdata = . ; + *(.data .data.* .gnu.linkonce.d.*) + SORT(CONSTRUCTORS) + } >ram + .data1 : { *(.data1) } >ram + .got.plt : { *(.got.plt) } >ram + . = .; + _gp = ALIGN(16) + 0x7ff0; + .got : { *(.got) } + /* We want the small data sections together, so single-instruction offsets + can access them all, and initialized data all before uninitialized, so + we can shorten the on-disk segment size. */ + .sdata : + { + *(.sdata .sdata.* .gnu.linkonce.s.*) + } >ram + .lit8 : { *(.lit8) } >ram + .lit4 : { *(.lit4) } >ram + _edata = .; PROVIDE (edata = .); + __bss_start = .; + _fbss = .; + .sbss : + { + *(.dynsbss) + *(.sbss .sbss.* .gnu.linkonce.sb.*) + *(.scommon) + } >ram + .bss : + { + *(.dynbss) + *(.bss .bss.* .gnu.linkonce.b.*) + *(COMMON) + /* Align here to ensure that the .bss section occupies space up to + _end. Align after .bss to ensure correct alignment even if the + .bss section disappears because there are no input sections. + FIXME: Why do we need it? When there is no .bss section, we don't + pad the .data section. */ + . = ALIGN(. != 0 ? 32 / 8 : 1); + } >ram + . = ALIGN(32 / 8); + . = ALIGN(32 / 8); + _end = .; PROVIDE (end = .); + . = DATA_SEGMENT_END (.); + /* 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) } + /* DWARF 3 */ + .debug_pubtypes 0 : { *(.debug_pubtypes) } + .debug_ranges 0 : { *(.debug_ranges) } + .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) } + .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) } + .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) } + .mdebug.abi32 : { KEEP(*(.mdebug.abi32)) } + .mdebug.abiN32 : { KEEP(*(.mdebug.abiN32)) } + .mdebug.abi64 : { KEEP(*(.mdebug.abi64)) } + .mdebug.abiO64 : { KEEP(*(.mdebug.abiO64)) } + .mdebug.eabi32 : { KEEP(*(.mdebug.eabi32)) } + .mdebug.eabi64 : { KEEP(*(.mdebug.eabi64)) } + .gcc_compiled_long32 : { KEEP(*(.gcc_compiled_long32)) } + .gcc_compiled_long64 : { KEEP(*(.gcc_compiled_long64)) } + /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) } }