//============================================================================= // // MLT linker script for ARM // //============================================================================= // ####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005, 2008 Free Software Foundation, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later // version. // // eCos is distributed in the hope that it will be useful, but WITHOUT // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License // along with eCos; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // As a special exception, if other files instantiate templates or use // macros or inline functions from this file, or you compile this file // and link it with other works to produce a work based on this file, // this file does not by itself cause the resulting work to be covered by // the GNU General Public License. However the source code for this file // must still be made available in accordance with section (3) of the GNU // General Public License v2. // // This exception does not invalidate any other reasons why a work based // on this file might be covered by the GNU General Public License. // ------------------------------------------- // ####ECOSGPLCOPYRIGHTEND#### //============================================================================= #include #include STARTUP(vectors.o) ENTRY(reset_vector) INPUT(extras.o) GROUP( CYGBLD_HAL_LINKER_GROUPED_LIBS ) #if defined(__ARMEB__) OUTPUT_FORMAT(elf32-bigarm) #endif #if defined(CYG_HAL_STARTUP_ROM) \ && defined(CYGPKG_HAL_ARM_PID) \ && defined(__ARMEB__) // Note: This is only needed when the PID board is used in BE mode without // the proper ROM controller part. // // In big-endian mode, merge .RODATA sections into the .DATA section. This // causes the data in these sections to be copied to RAM. When the CPU // makes byte or halfword access to RAM, A0/A1 are modified correctly. // This does not happen on ROM access (unless the proper ROM controller // is used). // #define MERGE_IN_RODATA *(.rodata*) #define CYGPRI_PID_BE_WORKAROUND #else // Keep RODATA in separate sections. #define MERGE_IN_RODATA #undef CYGPRI_PID_BE_WORKAROUND #endif // ALIGN_LMA is 4, but the AAPCS now requires that double word types // be aligned to 8, which means some input sections can be marked as needing // 8-byte alignment, even text ones (consider literal data). // This is quite a big backward-compatibility problem for us as a zillion // platform mlt files for ARM assume that 4-byte alignment is adequate. Really // this is a bigger problem for the VMA but of course the LMA and VMA have to // move in sync, since things like .data are just copied as a block. Still, // ALIGN_LMA as 4 is probably best, but there can be problems with this. #define ALIGN_LMA 4 #define AAPCS_ALIGN 8 #define FOLLOWING_ALIGNED(_section_, _align_) AT ((LOADADDR (_section_) + SIZEOF (_section_) + (_align_) - 1) & ~ ((_align_) - 1)) #define FOLLOWING(_section_) FOLLOWING_ALIGNED(_section_, ALIGN_LMA) #define LMA_EQ_VMA #define FORCE_OUTPUT . = . // Some versions of gcc define "arm" which causes problems with .note.arm.ident #undef arm #define SECTIONS_BEGIN \ /* Debug information */ \ .debug_aranges 0 : { *(.debug_aranges) } \ .debug_pubnames 0 : { *(.debug_pubnames) } \ .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) } \ .note.arm.ident 0 : { KEEP (*(.note.arm.ident)) } \ /DISCARD/ 0 : { *(.fini_array*) } // Following not used unless CYGHWR_HAL_ARM_SEPARATE_VSR_TABLE // defined in hal_platform_setup.h. Otherwise vsr table // goes in .fixed_vectors. #define SECTION_hal_vsr_table(_region_, _vma_, _lma_) \ .hal_vsr_table _vma_ : _lma_ \ { FORCE_OUTPUT; KEEP (*(.hal_vsr_table)) } \ > _region_ #define SECTION_fixed_vectors(_region_, _vma_, _lma_) \ .fixed_vectors _vma_ : _lma_ \ { FORCE_OUTPUT; KEEP (*(.fixed_vectors)) } \ > _region_ #define SECTION_rom_vectors(_region_, _vma_, _lma_) \ .rom_vectors _vma_ : _lma_ \ { __rom_vectors_vma = ABSOLUTE(.); \ FORCE_OUTPUT; KEEP (*(.vectors)) } \ > _region_ \ __rom_vectors_lma = LOADADDR(.rom_vectors); /* The following two sections are used for C++ exception handling * only and so can be discarded if not used for that. * These are both included directly from the SECTION_text * definition and so, for now, are not expected to be listed * separately in mlt files. */ #ifdef CYGPKG_LIBSTDCXX #define SECTION_ARM_extab(_region_, _vma_, _lma_) \ .ARM.extab _vma_ : _lma_ \ { PROVIDE (__stext = ABSOLUTE(.)); _stext = ABSOLUTE(.) ; \ FORCE_OUTPUT; \ *(.ARM.extab* .gnu.linkonce.armextab.*) } > _region_ #define SECTION_ARM_exidx(_region_, _vma_, _lma_) \ . = _vma_; \ . = ALIGN(AAPCS_ALIGN); \ __exidx_start = ABSOLUTE(.); \ .ARM.exidx ALIGN(AAPCS_ALIGN) : _lma_ { \ *(.ARM.exidx* .gnu.linkonce.armexidx.*) \ FORCE_OUTPUT; \ } > _region_ \ __exidx_end = ABSOLUTE(.); #else #define SECTION_ARM_extab(_region_, _vma_, _lma_) \ .ARM.extab _vma_ : _lma_ \ { PROVIDE (__stext = ABSOLUTE(.)); _stext = ABSOLUTE(.) ; \ FORCE_OUTPUT; \ } > _region_ \ /DISCARD/ 0 : { *(.ARM.extab* .gnu.linkonce.armextab.*) } #define SECTION_ARM_exidx(_region_, _vma_, _lma_) \ . = _vma_; \ . = ALIGN(AAPCS_ALIGN); \ __exidx_start = ABSOLUTE(.); \ .ARM.exidx ALIGN(AAPCS_ALIGN) : _lma_ { \ FORCE_OUTPUT; \ } > _region_ \ __exidx_end = ABSOLUTE(.); \ /DISCARD/ 0 : { *(.ARM.exidx* .gnu.linkonce.armexidx.*) } #endif // We slot in the .ARM.extab and .ARM.exidx sections first. They // need to be close to .text due to their relocations which may // want small offsets - .rodata may be somewhere very different. // This approach also allows forward compatibility with targets // which haven't used the EABI before (no new SECTION_xxx definition // to use). // One glitch is that the AAPCS can require up to 8-byte alignment // for double word types. For sections after the first (for which we // "trust" the MLT files (probably a mistake)), we need to // ensure the subsequent sections' VMA and LMA move in sync, which // means keeping the same alignment, and thus since for example literal // data in .text can require up to 8 byte alignment, the LMA must also // be 8 byte aligned. #define SECTION_text(_region_, _vma_, _lma_) \ SECTION_ARM_extab(_region_, _vma_, _lma_) \ SECTION_ARM_exidx(_region_, ALIGN(AAPCS_ALIGN), FOLLOWING_ALIGNED(.ARM.extab, AAPCS_ALIGN)) \ .text ALIGN(AAPCS_ALIGN) : FOLLOWING_ALIGNED(.ARM.exidx, AAPCS_ALIGN) \ { \ *(.text*) *(.gnu.warning) *(.gnu.linkonce.t.*) *(.init) \ *(.glue_7) *(.glue_7t) \ __CTOR_LIST__ = ABSOLUTE (.); KEEP (*(SORT (.ctors*))) __CTOR_END__ = ABSOLUTE (.); \ __DTOR_LIST__ = ABSOLUTE (.); KEEP (*(SORT (.dtors*))) __DTOR_END__ = ABSOLUTE (.); \ } > _region_ \ _etext = .; PROVIDE (__etext = .); #define SECTION_fini(_region_, _vma_, _lma_) \ .fini _vma_ : _lma_ \ { FORCE_OUTPUT; *(.fini) } \ > _region_ #if defined(CYGPRI_PID_BE_WORKAROUND) #define SECTION_rodata(_region_, _vma_, _lma_) #define SECTION_rodata1(_region_, _vma_, _lma_) #else #define SECTION_rodata(_region_, _vma_, _lma_) \ .rodata _vma_ : _lma_ \ { FORCE_OUTPUT; *(.rodata*) *(.gnu.linkonce.r.*) } \ > _region_ #define SECTION_rodata1(_region_, _vma_, _lma_) \ .rodata1 _vma_ : _lma_ \ { FORCE_OUTPUT; *(.rodata1) } \ > _region_ #endif // CYGPRI_PID_BE_WORKAROUND #define SECTION_fixup(_region_, _vma_, _lma_) \ .fixup _vma_ : _lma_ \ { FORCE_OUTPUT; *(.fixup) } \ > _region_ #ifdef CYGPKG_LIBSTDCXX /* We want to discard C++ exception frame data if we don't have the * C++ support to use it. So there are two versions of the section * definitions for .gcc_except_table and .eh_frame, one which keeps * them, the other discards. */ #define SECTION_gcc_except_table(_region_, _vma_, _lma_) \ .gcc_except_table _vma_ : _lma_ \ { FORCE_OUTPUT; \ KEEP(*(.gcc_except_table)) \ *(.gcc_except_table.*) \ } > _region_ #define SECTION_eh_frame(_region_, _vma_, _lma_) \ .eh_frame _vma_ : _lma_ \ { \ FORCE_OUTPUT; __EH_FRAME_BEGIN__ = .; \ KEEP(*(.eh_frame)) \ __FRAME_END__ = .; \ . = . + 8; \ } > _region_ = 0 #else #define SECTION_gcc_except_table(_region_, _vma_, _lma_) \ .gcc_except_table _vma_ : _lma_ \ { FORCE_OUTPUT; \ } > _region_ \ /DISCARD/ 0 : { *(.gcc_except_table*) } #define SECTION_eh_frame(_region_, _vma_, _lma_) \ .eh_frame _vma_ : _lma_ \ { \ FORCE_OUTPUT; __EH_FRAME_BEGIN__ = .; \ __FRAME_END__ = .; \ } > _region_ \ /DISCARD/ 0 : { *(.eh_frame) } #endif #define SECTION_RELOCS(_region_, _vma_, _lma_) \ .rel.text : \ { \ *(.rel.text) \ *(.rel.text.*) \ *(.rel.gnu.linkonce.t*) \ } > _region_ \ .rela.text : \ { \ *(.rela.text) \ *(.rela.text.*) \ *(.rela.gnu.linkonce.t*) \ } > _region_ \ .rel.data : \ { \ *(.rel.data) \ *(.rel.data.*) \ *(.rel.gnu.linkonce.d*) \ } > _region_ \ .rela.data : \ { \ *(.rela.data) \ *(.rela.data.*) \ *(.rela.gnu.linkonce.d*) \ } > _region_ \ .rel.rodata : \ { \ *(.rel.rodata) \ *(.rel.rodata.*) \ *(.rel.gnu.linkonce.r*) \ } > _region_ \ .rela.rodata : \ { \ *(.rela.rodata) \ *(.rela.rodata.*) \ *(.rela.gnu.linkonce.r*) \ } > _region_ \ .rel.got : { *(.rel.got) } > _region_ \ .rela.got : { *(.rela.got) } > _region_ \ .rel.ctors : { *(.rel.ctors) } > _region_ \ .rela.ctors : { *(.rela.ctors) } > _region_ \ .rel.dtors : { *(.rel.dtors) } > _region_ \ .rela.dtors : { *(.rela.dtors) } > _region_ \ .rel.init : { *(.rel.init) } > _region_ \ .rela.init : { *(.rela.init) } > _region_ \ .rel.fini : { *(.rel.fini) } > _region_ \ .rela.fini : { *(.rela.fini) } > _region_ \ .rel.bss : { *(.rel.bss) } > _region_ \ .rela.bss : { *(.rela.bss) } > _region_ \ .rel.plt : { *(.rel.plt) } > _region_ \ .rela.plt : { *(.rela.plt) } > _region_ \ .rel.dyn : { *(.rel.dyn) } > _region_ #define SECTION_got(_region_, _vma_, _lma_) \ .got _vma_ : _lma_ \ { \ FORCE_OUTPUT; *(.got.plt) *(.got) \ _GOT1_START_ = ABSOLUTE (.); *(.got1) _GOT1_END_ = ABSOLUTE (.); \ _GOT2_START_ = ABSOLUTE (.); *(.got2) _GOT2_END_ = ABSOLUTE (.); \ } > _region_ #define SECTION_mmu_tables(_region_, _vma_, _lma_) \ .mmu_tables _vma_ : _lma_ \ { FORCE_OUTPUT; *(.mmu_tables) } \ > _region_ #define SECTION_sram(_region_, _vma_, _lma_) \ .sram _vma_ : _lma_ \ { FORCE_OUTPUT; *(.sram*) } \ > _region_ #define SECTION_data(_region_, _vma_, _lma_) \ .data _vma_ : _lma_ \ { __ram_data_start = ABSOLUTE (.); \ *(.data*) *(.data1) *(.gnu.linkonce.d.*) MERGE_IN_RODATA \ . = ALIGN (4); \ KEEP(*( SORT (.ecos.table.*))) ; \ . = ALIGN (4); \ __init_array_start__ = ABSOLUTE (.); KEEP (*(SORT (.init_array.*))) \ KEEP (*(SORT (.init_array))) __init_array_end__ = ABSOLUTE (.); \ *(.dynamic) *(.sdata*) *(.gnu.linkonce.s.*) \ . = ALIGN (4); *(.2ram.*) } \ > _region_ \ __rom_data_start = LOADADDR (.data); \ __ram_data_end = .; PROVIDE (__ram_data_end = .); _edata = .; PROVIDE (edata = .); \ PROVIDE (__rom_data_end = LOADADDR (.data) + SIZEOF(.data)); #define SECTION_bss(_region_, _vma_, _lma_) \ .bss _vma_ : _lma_ \ { __bss_start = ABSOLUTE (.); \ *(.scommon) *(.dynsbss) *(.sbss*) *(.gnu.linkonce.sb.*) \ *(.dynbss) *(.bss*) *(.gnu.linkonce.b.*) *(COMMON) \ __bss_end = ABSOLUTE (.); } \ > _region_ #define SECTIONS_END . = ALIGN(4); _end = .; PROVIDE (end = .); #include #include CYGHWR_MEMORY_LAYOUT_LDI