From 3f432fbd018ee684a4f6e760eff901ea463ccb0b Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Sat, 22 Mar 2008 14:01:49 +0000 Subject: 2008-03-22 Joel Sherrill * configure.ac, startup/exit.c: Add BSP_PRESS_KEY_FOR_RESET configuration option. When this is set to one, a clean exit of an application will result in the BSP resetting the hardware without waiting for a human to press a key. * start/start.S, startup/linkcmds: Replace the linkcmds with a version very closely based upon the default in binutils 2.18 for this target. This eliminated weird failures with C++ dtors even in C applications. We had an extra _ on a symbol used in start.S. --- c/src/lib/libbsp/i386/pc386/startup/linkcmds | 281 +++++++++++++++++---------- 1 file changed, 177 insertions(+), 104 deletions(-) (limited to 'c/src/lib/libbsp/i386/pc386/startup/linkcmds') diff --git a/c/src/lib/libbsp/i386/pc386/startup/linkcmds b/c/src/lib/libbsp/i386/pc386/startup/linkcmds index 96de268523..aeb347af0c 100644 --- a/c/src/lib/libbsp/i386/pc386/startup/linkcmds +++ b/c/src/lib/libbsp/i386/pc386/startup/linkcmds @@ -1,54 +1,72 @@ -/*-------------------------------------------------------------------------+ -| linkcmds v1.1 - PC386 BSP - 1997/08/07 -+--------------------------------------------------------------------------+ -| This file contains directives for the GNU linker which are specific to the -| PC386 bsp. -+--------------------------------------------------------------------------+ -| (C) Copyright 1997 - -| - NavIST Group - Real-Time Distributed Systems and Industrial Automation -| -| http://pandora.ist.utl.pt -| -| Instituto Superior Tecnico * Lisboa * PORTUGAL -+--------------------------------------------------------------------------+ -| Disclaimer: -| -| This file is provided "AS IS" without warranty of any kind, either -| expressed or implied. -+--------------------------------------------------------------------------+ -| This code is based on: -| linkcmds,v 1.3 1995/12/19 20:06:58 joel Exp - FORCE CPU386 BSP -| With the following copyright notice: -| ************************************************************************** -| * COPYRIGHT (c) 1989-1999. -| * On-Line Applications Research Corporation (OAR). -| * -| * The license and distribution terms for this file may be -| * found in found in the file LICENSE in this distribution or at -| * http://www.rtems.com/license/LICENSE. -| ************************************************************************** -| -| $Id$ -+--------------------------------------------------------------------------*/ - +/* + * Copy of default "default linker script, for normal executables" + * provided with binutils 2.18 with minor modifications for use + * as pc386 linkcmds. These changes include: + * + * + sections commented out marked with "XXX commented out --joel" + * + addition of m_hdr section + * + addition of FreeBSD sysctl sections + * + * $Id$ + */ +/* + * XXX commented out --joel +OUTPUT_FORMAT("elf32-i386", "elf32-i386", + "elf32-i386") +OUTPUT_ARCH(i386) +ENTRY(_start) +*/ SECTIONS { -/* .m_hdr : - { - . = ALIGN(4); - *(.m_hdr) - } + /* Read-only sections, merged into text segment: */ +/* + * XXX commented out --joel + PROVIDE (__executable_start = 0x08048000); . = 0x08048000 + SIZEOF_HEADERS; */ - .text : + .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) } + .rel.init : { *(.rel.init) } + .rela.init : { *(.rela.init) } + .rel.text : { *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) } + .rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) } + .rel.fini : { *(.rel.fini) } + .rela.fini : { *(.rela.fini) } + .rel.rodata : { *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) } + .rela.rodata : { *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) } + .rel.data.rel.ro : { *(.rel.data.rel.ro* .rel.gnu.linkonce.d.rel.ro.*) } + .rela.data.rel.ro : { *(.rela.data.rel.ro* .rela.gnu.linkonce.d.rel.ro.*) } + .rel.data : { *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) } + .rela.data : { *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) } + .rel.tdata : { *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) } + .rela.tdata : { *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*) } + .rel.tbss : { *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) } + .rela.tbss : { *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*) } + .rel.ctors : { *(.rel.ctors) } + .rela.ctors : { *(.rela.ctors) } + .rel.dtors : { *(.rel.dtors) } + .rela.dtors : { *(.rela.dtors) } + .rel.got : { *(.rel.got) } + .rela.got : { *(.rela.got) } + .rel.bss : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) } + .rela.bss : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) } + .rel.plt : { *(.rel.plt) } + .rela.plt : { *(.rela.plt) } + .plt : { *(.plt) } + .text : { - _text_start = . ; - . = ALIGN(4); - *(.m_hdr) - *(.text) - *(.text.*) - . = ALIGN (16); - + *(.m_hdr) + *(.text .stub .text.* .gnu.linkonce.t.*) + KEEP (*(.text.*personality*)) + /* .gnu.warning sections are handled specially by elf32.em. */ + *(.gnu.warning) /* * Special FreeBSD sysctl sections. */ @@ -59,94 +77,149 @@ SECTIONS *(set_domain_*); *(set_pseudo_*); - *(.eh_frame) - . = ALIGN (16); - - *(.gnu.linkonce.t*) - - /* - * C++ constructors - */ - __CTOR_LIST__ = .; - LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2) - *(.ctors) - LONG(0) - __CTOR_END__ = .; - __DTOR_LIST__ = .; - LONG((__DTOR_END__ - __DTOR_LIST__) / 4 - 2) - *(.dtors) - LONG(0) - __DTOR_END__ = .; + } =0x90909090 - _rodata_start = . ; - *(.rodata*) - *(.gnu.linkonce.r*) - _erodata = ALIGN( 0x10 ) ; - - *(.jcr) - _etext = ALIGN( 0x10 ) ; + .init : + { + KEEP (*(.init)) + } =0x90909090 + .fini : + { + KEEP (*(.fini)) + } =0x90909090 + PROVIDE (__etext = .); + PROVIDE (_etext = .); + PROVIDE (etext = .); + .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) } + .rodata1 : { *(.rodata1) } + .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 : { *(.init) } = 0x9090 - .fini : { *(.fini) } = 0x9090 - .data ADDR( .fini ) + SIZEOF( .fini ): + .init_array : { - _data_start = . ; - *(.data) - *(.data.*) - *(.gnu.linkonce.d*) - *(.gcc_except_table*) - _edata = ALIGN( 0x10 ) ; + PROVIDE_HIDDEN (__init_array_start = .); + KEEP (*(SORT(.init_array.*))) + KEEP (*(.init_array)) + PROVIDE_HIDDEN (__init_array_end = .); } - - .bss ADDR( .data ) + SIZEOF( .data ): + .fini_array : { - _bss_start = . ; - *(.bss) - *(.bss.*) - *(COMMON) - _end = . ; - __end = . ; + 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.*) } + .dynamic : { *(.dynamic) } + .got : { *(.got) } + . = DATA_SEGMENT_RELRO_END (12, .); + .got.plt : { *(.got.plt) } + .data : + { + *(.data .data.* .gnu.linkonce.d.*) + KEEP (*(.gnu.linkonce.d.*personality*)) + SORT(CONSTRUCTORS) + } + .data1 : { *(.data1) } + _edata = .; PROVIDE (edata = .); + __bss_start = .; + .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 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) } - + .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) } + .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) } - /* These must appear regardless of . */ + /* DWARF 3 */ + .debug_pubtypes 0 : { *(.debug_pubtypes) } + .debug_ranges 0 : { *(.debug_ranges) } + .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) } + /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) } } - -- cgit v1.2.3