From 2fdadc0f82431d8b5249257cc1651d32c473895b Mon Sep 17 00:00:00 2001 From: Daniel Schwierzeck Date: Sun, 6 Jan 2019 20:42:43 +0100 Subject: [PATCH] MIPS: optimize and fix ELF sections Discard ABI related sections which are not required for debugging. Rearrange debug sections similar to Linux. Remove the remaining explicitely specified sections in the unused part because those sections are not created anymore or because the linker puts them by default at the end of the ELF binary. Signed-off-by: Daniel Schwierzeck Tested-by: Ezequiel Garcia --- arch/mips/cpu/u-boot-spl.lds | 100 +++++++++++++++++++++++++++-------------- arch/mips/cpu/u-boot.lds | 104 +++++++++++++++++++++++++++++-------------- 2 files changed, 136 insertions(+), 68 deletions(-) diff --git a/arch/mips/cpu/u-boot-spl.lds b/arch/mips/cpu/u-boot-spl.lds index 1273b74..be194d3 100644 --- a/arch/mips/cpu/u-boot-spl.lds +++ b/arch/mips/cpu/u-boot-spl.lds @@ -46,43 +46,75 @@ SECTIONS __bss_end = .; } > .bss_mem - .rel.dyn (NOLOAD) : { - *(.rel.dyn) + /* These mark the ABI of U-Boot for debuggers. */ + .mdebug.abi32 : { + KEEP(*(.mdebug.abi32)) } - - .dynsym : { - *(.dynsym) - } - - .dynbss : { - *(.dynbss) - } - - .dynstr : { - *(.dynstr) - } - - .dynamic : { - *(.dynamic) + .mdebug.abi64 : { + KEEP(*(.mdebug.abi64)) } - .plt : { - *(.plt) + /* This is the MIPS specific mdebug section. */ + .mdebug : { *(.mdebug) } + + /* 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.*) } - - .interp : { - *(.interp) - } - - .gnu : { - *(.gnu*) - } - - .MIPS.stubs : { - *(.MIPS.stubs) - } - - .hash : { - *(.hash) + .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) } + .debug_pubtypes 0 : { *(.debug_pubtypes) } + /* DWARF 3 */ + .debug_ranges 0 : { *(.debug_ranges) } + /* 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) } + /* GNU DWARF 2 extensions */ + .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } + .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } + /* DWARF 4 */ + .debug_types 0 : { *(.debug_types) } + /* DWARF 5 */ + .debug_macro 0 : { *(.debug_macro) } + .debug_addr 0 : { *(.debug_addr) } + + /DISCARD/ : { + /* ABI crap starts here */ + *(.MIPS.abiflags) + *(.MIPS.options) + *(.options) + *(.pdr) + *(.reginfo) + *(.eh_frame) } } diff --git a/arch/mips/cpu/u-boot.lds b/arch/mips/cpu/u-boot.lds index fd0f1b5..8649673 100644 --- a/arch/mips/cpu/u-boot.lds +++ b/arch/mips/cpu/u-boot.lds @@ -68,39 +68,75 @@ SECTIONS __bss_end = .; } - .dynsym _end : { - *(.dynsym) - } - - .dynbss : { - *(.dynbss) - } - - .dynstr : { - *(.dynstr) - } - - .dynamic : { - *(.dynamic) - } - - .plt : { - *(.plt) - } - - .interp : { - *(.interp) - } - - .gnu : { - *(.gnu*) - } - - .MIPS.stubs : { - *(.MIPS.stubs) - } - - .hash : { - *(.hash) + /* These mark the ABI of U-Boot for debuggers. */ + .mdebug.abi32 : { + KEEP(*(.mdebug.abi32)) + } + .mdebug.abi64 : { + KEEP(*(.mdebug.abi64)) + } + + /* This is the MIPS specific mdebug section. */ + .mdebug : { *(.mdebug) } + + /* 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) } + .debug_pubtypes 0 : { *(.debug_pubtypes) } + /* DWARF 3 */ + .debug_ranges 0 : { *(.debug_ranges) } + /* 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) } + /* GNU DWARF 2 extensions */ + .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } + .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } + /* DWARF 4 */ + .debug_types 0 : { *(.debug_types) } + /* DWARF 5 */ + .debug_macro 0 : { *(.debug_macro) } + .debug_addr 0 : { *(.debug_addr) } + + /DISCARD/ : { + /* ABI crap starts here */ + *(.MIPS.abiflags) + *(.MIPS.options) + *(.options) + *(.pdr) + *(.reginfo) + *(.eh_frame) } } -- 2.7.4