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Add __data_start symbol to all ELF archs to consistently mark the beginning

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of the writable sections. This is useful for garbage collectors such as
boehm-gc to locate these sections in a uniform way.
input and okay drahn@, miod@
This commit is contained in:
kurt 2008-03-13 19:40:56 +00:00
parent fbbb8b44cc
commit d110c1db53
4 changed files with 6 additions and 1 deletions
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1
gnu/usr.bin/binutils/ld/emulparams/elf64btsmip_obsd.sh
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@ -4,3 +4,4 @@ TEXT_START_ADDR="0x10000000"
. ${srcdir}/emulparams/elf_obsd.sh
# XXX causes GOT oflows
NO_PAD_CDTOR=y
DATA_START_SYMBOLS='_fdata = . ; __data_start = . ;'

1
gnu/usr.bin/binutils/ld/emulparams/elf64ltsmip_obsd.sh
View File

@ -4,3 +4,4 @@ TEXT_START_ADDR="0x10000000"
. ${srcdir}/emulparams/elf_obsd.sh
# XXX causes GOT oflows
NO_PAD_CDTOR=y
DATA_START_SYMBOLS='_fdata = . ; __data_start = . ;'

1
gnu/usr.bin/binutils/ld/emulparams/elf_obsd.sh
View File

@ -5,3 +5,4 @@ RODATA_PADSIZE=${MAXPAGESIZE}
RODATA_ALIGN=". = ALIGN(${RODATA_PADSIZE}) + (. & (${RODATA_PADSIZE} - 1))"
PAD_GOT=
PAD_PLT=
DATA_START_SYMBOLS='__data_start = . ;'

4
gnu/usr.bin/binutils/ld/emulparams/hppaobsd.sh
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@ -10,8 +10,10 @@ MAXPAGESIZE=0x1000
ENTRY="__start"
MACHINE=hppa1.1 # We use 1.1 specific features.
OTHER_READONLY_SECTIONS=".PARISC.unwind ${RELOCATING-0} : { *(.PARISC.unwind) }"
DATA_START_SYMBOLS='PROVIDE ($global$ = .);'
DATA_NONEXEC_PLT=
GENERATE_SHLIB_SCRIPT=yes
. ${srcdir}/emulparams/elf_obsd.sh
#override elf_obsd.sh
DATA_START_SYMBOLS='PROVIDE ($global$ = .); __data_start = . ;'