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Diffstat (limited to 'ld/scripttempl/ppcpe.sc')
| -rw-r--r-- | ld/scripttempl/ppcpe.sc | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/ld/scripttempl/ppcpe.sc b/ld/scripttempl/ppcpe.sc new file mode 100644 index 0000000..f67cab8 --- /dev/null +++ b/ld/scripttempl/ppcpe.sc @@ -0,0 +1,213 @@ +# A PE linker script for PowerPC. +# Loosely based on Steve Chamberlain's pe.sc. +# All new mistakes should be credited to Kim Knuttila (krk@cygnus.com) +# +# Copyright (C) 2014 Free Software Foundation, Inc. +# +# Copying and distribution of this file, with or without modification, +# are permitted in any medium without royalty provided the copyright +# notice and this notice are preserved. +# +# These are substituted in as variables in order to get '}' in a shell +# conditional expansion. + +INIT='.init : { *(.init) }' +FINI='.fini : { *(.fini) }' + +cat <<EOF +/* Copyright (C) 2014 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(${OUTPUT_FORMAT}) +${LIB_SEARCH_DIRS} + +/* Much of this layout was determined by delving into .exe files for + the box generated by other compilers/linkers/etc. This means that + if a particular feature did not happen to appear in one of the + subject files, then it may not be yet supported. +*/ + +/* It's "mainCRTStartup", not "_mainCRTStartup", and it's located in + one of the two .lib files (libc.lib and kernel32.lib) that currently + must be present on the link line. This means that you must use + "-u mainCRTStartup" to make sure it gets included in the link. +*/ + +${RELOCATING+ENTRY (mainCRTStartup)} + +SECTIONS +{ + + /* text - the usual meaning */ + .text ${RELOCATING+ __image_base__ + __section_alignment__ } : + { + ${RELOCATING+ *(.init);} + *(.text) + ${RELOCATING+ *(.text.*)} + *(.gcc_except_table) + ${CONSTRUCTING+ ___CTOR_LIST__ = .; __CTOR_LIST__ = . ; + LONG (-1); *(.ctors); *(.ctor); LONG (0); } + ${CONSTRUCTING+ ___DTOR_LIST__ = .; __DTOR_LIST__ = . ; + LONG (-1); *(.dtors); *(.dtor); LONG (0); } + ${RELOCATING+ *(.fini);} + ${RELOCATING+ etext = .}; + } + + /* rdata - Read Only Runtime Data + CTR sections: All of the CRT (read only C runtime data) sections + appear at the start of the .rdata (read only runtime data) + section, in the following order. Don't know if it matters or not. + Not all sections are always present either. + .rdata: compiler generated read only data + .xdata: compiler generated exception handling table. (Most docs + seem to suggest that this section is now deprecated infavor + of the ydata section) + .edata: The exported names table. + */ + .rdata BLOCK(__section_alignment__) : + { + *(.CRT\$XCA); + *(.CRT\$XCC); + *(.CRT\$XCZ); + *(.CRT\$XIA); + *(.CRT\$XIC); + *(.CRT\$XIZ); + *(.CRT\$XLA); + *(.CRT\$XLZ); + *(.CRT\$XPA); + *(.CRT\$XPX); + *(.CRT\$XPZ); + *(.CRT\$XTA); + *(.CRT\$XTZ); + *(.rdata); + *(.xdata); + } + + .edata BLOCK(__section_alignment__) : + { + *(.edata); + } + + /* data - initialized data + .ydata: exception handling information. + .data: the usual meaning. + .data2: more of the same. + .bss: For some reason, bss appears to be included in the data + section, as opposed to being given a section of it's own. + COMMON: + */ + .data BLOCK(__section_alignment__) : + { + __data_start__ = . ; + *(.ydata); + *(.data); + *(.data2); + __bss_start__ = . ; + *(.bss) ; + *(COMMON); + __bss_end__ = . ; + ${RELOCATING+ end = .}; + __data_end__ = . ; + } + + /* The exception handling table. A sequence of 5 word entries. Section + address and extent are placed in the DataDirectory. + */ + .pdata BLOCK(__section_alignment__) : + { + *(.pdata) + ; + } + + /* The idata section is chock full of magic bits. + 1. Boundaries around various idata parts are used to initialize + some of the fields of the DataDirectory. In particular, the + magic for 2, 4 and 5 are known to be used. Some compilers + appear to generate magic section symbols for this purpose. + Where we can, we catch such symbols and use our own. This of + course is something less than a perfect strategy. + 2. The table of contents is placed immediately after idata4. + The ".private.toc" sections are generated by the ppc bfd. The + .toc variable is generated by gas, and resolved here. It is + used to initialized function descriptors (and anyone else who + needs the address of the module's toc). The only thing + interesting about it at all? Most ppc instructions using it + have a 16bit displacement field. The convention for addressing + is to initialize the .toc value to 32K past the start of the + actual toc, and subtract 32K from all references, thus using + the entire 64K range. Naturally, the reloc code must agree + on this number or you get pretty stupid results. + */ + .idata BLOCK(__section_alignment__) : + { + __idata2_magic__ = .; + *(.idata\$2); + __idata3_magic__ = .; + *(.idata\$3); + __idata4_magic__ = .; + *(.idata\$4); + . = ALIGN(4); + .toc = . + 32768; + *(.private.toc); + __idata5_magic__ = .; + *(.idata\$5); + __idata6_magic__ = .; + *(.idata\$6); + __idata7_magic__ = .; + *(.idata\$7); + ; + } + + /* reldata -- data that requires relocation + */ + .reldata BLOCK(__section_alignment__) : + { + *(.reldata) + ; + } + + + /* Resources */ + .rsrc BLOCK(__section_alignment__) : + { + *(.rsrc\$01) + *(.rsrc\$02) + ; + } + + .stab BLOCK(__section_alignment__) ${RELOCATING+(NOLOAD)} : + { + [ .stab ] + } + + .stabstr BLOCK(__section_alignment__) ${RELOCATING+(NOLOAD)} : + { + [ .stabstr ] + } + + /* The .reloc section is currently generated by the dlltool from Steve + Chamberlain in a second pass of linking. Section address and extent + are placed in the DataDirectory. + */ + .reloc BLOCK(__section_alignment__) : + { + *(.reloc) + ; + } + + /* We don't do anything useful with codeview debugger support or the + directive section (yet). Hopefully, we junk them correctly. + */ + /DISCARD/ BLOCK(__section_alignment__) : + { + *(.debug\$S) + *(.debug\$T) + *(.debug\$F) + *(.drectve) + ; + } +} +EOF |