From 4e6cad88bc8636858f6a361b8f94adf773c47d81 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Fri, 13 Jan 2017 17:04:22 +0100 Subject: Added riscv.ld linker script (static entry point at 0x10000) --- firmware/riscv.ld | 200 +++++++++++++++++++++++++++++++++++++++++++++++++ firmware/riscv_ld.diff | 90 ++++++++++++++++++++++ 2 files changed, 290 insertions(+) create mode 100644 firmware/riscv.ld create mode 100644 firmware/riscv_ld.diff (limited to 'firmware') diff --git a/firmware/riscv.ld b/firmware/riscv.ld new file mode 100644 index 0000000..20fd2fb --- /dev/null +++ b/firmware/riscv.ld @@ -0,0 +1,200 @@ +/* Default linker script, for normal executables */ +/* Copyright (C) 2014-2016 Free Software Foundation, Inc. + Copying and distribution of this script, with or without modification, + are permitted in any medium without royalty provided the copyright + notice and this notice are preserved. */ +OUTPUT_FORMAT("elf32-littleriscv", "elf32-littleriscv", + "elf32-littleriscv") +OUTPUT_ARCH(riscv) +ENTRY(_start) +SECTIONS +{ + . = 0x00010000; + .text : + { + *(.text) + *(.text.unlikely .text.*_unlikely .text.unlikely.*) + *(.text.exit .text.exit.*) + *(.text.startup .text.startup.*) + *(.text.hot .text.hot.*) + *(.stub .text.* .gnu.linkonce.t.*) + /* .gnu.warning sections are handled specially by elf32.em. */ + *(.gnu.warning) + } + .init : + { + KEEP (*(SORT_NONE(.init))) + } + .plt : { *(.plt) } + .iplt : { *(.iplt) } + .fini : + { + KEEP (*(SORT_NONE(.fini))) + } + 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_entry .eh_frame_entry.*) } + .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) *(.eh_frame.*) } + .gcc_except_table : ONLY_IF_RO { *(.gcc_except_table + .gcc_except_table.*) } + .gnu_extab : ONLY_IF_RO { *(.gnu_extab*) } + /* These sections are generated by the Sun/Oracle C++ compiler. */ + .exception_ranges : ONLY_IF_RO { *(.exception_ranges + .exception_ranges*) } + /* Adjust the address for the data segment. We want to adjust up to + the same address within the page on the next page up. */ + . = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE)); + /* Exception handling */ + .eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) *(.eh_frame.*) } + .gnu_extab : ONLY_IF_RW { *(.gnu_extab) } + .gcc_except_table : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) } + .exception_ranges : ONLY_IF_RW { *(.exception_ranges .exception_ranges*) } + /* 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_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*))) + KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors)) + PROVIDE_HIDDEN (__init_array_end = .); + } + .fini_array : + { + PROVIDE_HIDDEN (__fini_array_start = .); + KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*))) + KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors)) + 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 .data.rel.ro.* .gnu.linkonce.d.rel.ro.*) } + .dynamic : { *(.dynamic) } + . = DATA_SEGMENT_RELRO_END (0, .); + .data : + { + *(.data .data.* .gnu.linkonce.d.*) + SORT(CONSTRUCTORS) + } + .data1 : { *(.data1) } + .got : { *(.got.plt) *(.igot.plt) *(.got) *(.igot) } + /* 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 : + { + _gp = . + 0x800; + *(.srodata.cst16) *(.srodata.cst8) *(.srodata.cst4) *(.srodata.cst2) *(.srodata .srodata.*) + *(.sdata .sdata.* .gnu.linkonce.s.*) + } + _edata = .; PROVIDE (edata = .); + . = .; + __bss_start = .; + .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); + . = SEGMENT_START("ldata-segment", .); + . = 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_line.* .debug_line_end ) } + .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) } + /* DWARF Extension. */ + .debug_macro 0 : { *(.debug_macro) } + .debug_addr 0 : { *(.debug_addr) } + .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) } + /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) } +} + diff --git a/firmware/riscv_ld.diff b/firmware/riscv_ld.diff new file mode 100644 index 0000000..104a245 --- /dev/null +++ b/firmware/riscv_ld.diff @@ -0,0 +1,90 @@ +--- <(riscv32-unknown-elf-ld -z nocombreloc -verbose) 2017-01-13 16:55:07.569030165 +0100 ++++ riscv.ld 2017-01-13 16:56:47.796761642 +0100 +@@ -1,9 +1,3 @@ +-GNU ld (GNU Binutils) 2.28.51.20170101 +- Supported emulations: +- elf32lriscv +- elf64lriscv +-using internal linker script: +-================================================== + /* Default linker script, for normal executables */ + /* Copyright (C) 2014-2016 Free Software Foundation, Inc. + Copying and distribution of this script, with or without modification, +@@ -13,62 +7,26 @@ + "elf32-littleriscv") + OUTPUT_ARCH(riscv) + ENTRY(_start) +-SEARCH_DIR("/opt/new_riscv32i/riscv32-unknown-elf/lib"); + SECTIONS + { +- /* Read-only sections, merged into text segment: */ +- PROVIDE (__executable_start = SEGMENT_START("text-segment", 0x10000)); . = SEGMENT_START("text-segment", 0x10000) + SIZEOF_HEADERS; +- .interp : { *(.interp) } +- .note.gnu.build-id : { *(.note.gnu.build-id) } +- .hash : { *(.hash) } +- .gnu.hash : { *(.gnu.hash) } +- .dynsym : { *(.dynsym) } +- .dynstr : { *(.dynstr) } +- .gnu.version : { *(.gnu.version) } +- .gnu.version_d : { *(.gnu.version_d) } +- .gnu.version_r : { *(.gnu.version_r) } +- .rela.init : { *(.rela.init) } +- .rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) } +- .rela.fini : { *(.rela.fini) } +- .rela.rodata : { *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) } +- .rela.data.rel.ro : { *(.rela.data.rel.ro .rela.data.rel.ro.* .rela.gnu.linkonce.d.rel.ro.*) } +- .rela.data : { *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) } +- .rela.tdata : { *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*) } +- .rela.tbss : { *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*) } +- .rela.ctors : { *(.rela.ctors) } +- .rela.dtors : { *(.rela.dtors) } +- .rela.got : { *(.rela.got) } +- .rela.sdata : { *(.rela.sdata .rela.sdata.* .rela.gnu.linkonce.s.*) } +- .rela.sbss : { *(.rela.sbss .rela.sbss.* .rela.gnu.linkonce.sb.*) } +- .rela.sdata2 : { *(.rela.sdata2 .rela.sdata2.* .rela.gnu.linkonce.s2.*) } +- .rela.sbss2 : { *(.rela.sbss2 .rela.sbss2.* .rela.gnu.linkonce.sb2.*) } +- .rela.bss : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) } +- .rela.iplt : +- { +- PROVIDE_HIDDEN (__rela_iplt_start = .); +- *(.rela.iplt) +- PROVIDE_HIDDEN (__rela_iplt_end = .); +- } +- .rela.plt : +- { +- *(.rela.plt) +- } +- .init : +- { +- KEEP (*(SORT_NONE(.init))) +- } +- .plt : { *(.plt) } +- .iplt : { *(.iplt) } ++ . = 0x00010000; + .text : + { ++ *(.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.*) ++ *(.stub .text.* .gnu.linkonce.t.*) + /* .gnu.warning sections are handled specially by elf32.em. */ + *(.gnu.warning) + } ++ .init : ++ { ++ KEEP (*(SORT_NONE(.init))) ++ } ++ .plt : { *(.plt) } ++ .iplt : { *(.iplt) } + .fini : + { + KEEP (*(SORT_NONE(.fini))) +@@ -240,5 +198,3 @@ + /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) } + } + +- +-================================================== -- cgit