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* scripttempl/elf.c: Define __bss_start before the .sbss section.

This commit is contained in:
Ian Lance Taylor 1994-01-08 01:01:23 +00:00
parent fe4e32905b
commit 267a3ab363
2 changed files with 64 additions and 13 deletions
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4
ld/ChangeLog
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@ -1,3 +1,7 @@
Fri Jan 7 20:00:24 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
* scripttempl/elf.c: Define __bss_start before the .sbss section.
Thu Jan 6 00:13:10 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
* ldmain.c (add_to_set): Add bitsize argument.

73
ld/scripttempl/elf.sc
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@ -1,36 +1,83 @@
#
# Unusual variables checked by this code:
# NOP - two byte opcode for no-op (defaults to 0)
# DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
# OTHER_READONLY_SECTIONS - other than .text .init .ctors .rodata ...
# (e.g., .PARISC.milli)
# OTHER_READWRITE_SECTIONS - other than .data .bss .sdata ...
# (e.g., .PARISC.global)
# EXECUTABLE_SYMBOLS - symbols that must be defined for an
# executable (e.g., _DYNAMIC_LINK)
#
# When adding sections, do note that the names of some sections are used
# when specifying the start address of the next.
#
cat <<EOF
OUTPUT_FORMAT("${OUTPUT_FORMAT}")
OUTPUT_ARCH(${ARCH})
${RELOCATING+${LIB_SEARCH_DIRS}}
/* Do we need any of these for elf?
${RELOCATING+__DYNAMIC = 0;}
${STACKZERO+${RELOCATING+${STACKZERO}}}
${SHLIB_PATH+${RELOCATING+${SHLIB_PATH}}} */
${RELOCATING+/* Do we need any of these for elf?
__DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */}
${RELOCATING+${EXECUTABLE_SYMBOLS}}
${RELOCATING- /* For some reason, the Solaris linker makes bad executables
if gld -r is used and the intermediate file has sections starting
at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
bug. But for now assigning the zero vmas works. */}
SECTIONS
{
.text ${RELOCATING+${TEXT_START_ADDR}}:
/* Read-only sections, merged into text segment: */
.text ${RELOCATING+${TEXT_START_ADDR}} ${RELOCATING-0} :
{
CREATE_OBJECT_SYMBOLS
*(.init)
*(.text)
*(.fini)
*(.rodata)
${RELOCATING+_etext = ${DATA_ALIGNMENT};}
CREATE_OBJECT_SYMBOLS
${RELOCATING+_etext = .;}
}
.data ${RELOCATING+${DATA_ALIGNMENT}} :
.init ${RELOCATING+.} ${RELOCATING-0} : { *(.init) } =${NOP-0}
.fini ${RELOCATING+.} ${RELOCATING-0} : { *(.fini) } =${NOP-0}
.ctors ${RELOCATING+.} ${RELOCATING-0} : { *(.ctors) }
.dtors ${RELOCATING+.} ${RELOCATING-0} : { *(.dtors) }
.rodata ${RELOCATING+.} ${RELOCATING-0} : { *(.rodata) }
.rodata1 ${RELOCATING+.} ${RELOCATING-0} : { *(.rodata1) }
${RELOCATING+${OTHER_READONLY_SECTIONS}}
/* also: .hash .dynsym .dynstr .plt(if r/o) .rel.got */
/* Read-write section, merged into data segment: */
.data ${RELOCATING+
${DATA_ADDR- ADDR(.rodata1)+SIZEOF(.rodata1)+${MAXPAGESIZE}}
}
${RELOCATING-0} :
{
*(.data)
${CONSTRUCTING+CONSTRUCTORS}
${RELOCATING+_edata = .;}
}
.bss ${RELOCATING+SIZEOF(.data) + ADDR(.data)} :
.data1 ${RELOCATING+.} ${RELOCATING-0} : { *(.data1) }
${RELOCATING+${OTHER_READWRITE_SECTIONS}}
/* also (before uninitialized portion): .dynamic .got .plt(if r/w)
(or does .dynamic go into its own segment?) */
/* 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 ${RELOCATING+.} ${RELOCATING-0} : { *(.sdata) }
${RELOCATING+__bss_start = .};
.sbss ${RELOCATING+.} ${RELOCATING-0} : { *(.sbss) *(.scommon) }
.bss ${RELOCATING+.} ${RELOCATING-0} :
{
${RELOCATING+ __bss_start = .};
*(.bss)
*(COMMON)
${RELOCATING+_end = . };
${RELOCATING+end = . };
}
/* Debug sections. These should never be loadable, but they must have
zero addresses for the debuggers to work correctly. */
.line 0 : { *(.line) }
.debug 0 : { *(.debug) }
.debug_sfnames 0 : { *(.debug_sfnames) }
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_macinfo 0 : { *(.debug_macinfo) }
.debug_pubnames 0 : { *(.debug_pubnames) }
.debug_aranges 0 : { *(.debug_aranges) }
}
EOF