mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2025-02-11 13:02:10 +08:00
Code Issues Packages Projects Releases Wiki Activity
c144f63833
binutils-gdb/ld/scripttempl/elf.sc
John David Anglin a82e3815df hppa: Implement PA 2.0 symbolic relocations for long displacements 
The PA 2.0 architecture introduced several new load and store
instructions with long displacements.  These include floating
point loads and stores for word mode, and integer and floating
point loads and stores for double words.  Currently, ld does
not correctly support symbolic relocations for these instructions.

If these are used, ld applies the standard R_PARISC_DPREL14R
relocation and corrupts the instruction.  This change uses
bfd_hppa_insn2fmt to determine the correct relocation format.

We need to check the computed displacement as the immediate
value used in these instruction must be a multiple of 4 or 8
depending on whether the access is for a word or double word.

A misaligned offset can potentially occur if the symbol is not
properly aligned or if $global$ (the global pointer) is not
double word aligned.  $global$ is provided as a .data section
start symbol.  The patch adjusts elf.sc and hppalinux.sh to
align .data to a 8-byte boundary in non-shared and non-pie
links.

2024-04-01  John David Anglin  <danglin@gcc.gnu.org>

	PR ld/31503

bfd/ChangeLog:

	* elf32-hppa.c (final_link_relocate): Output

ld/ChangeLog:

	* emulparams/hppalinux.sh (DATA_SECTION_ALIGNMENT): Define.
	* scripttempl/elf.sc: Align .data section to DATA_SECTION_ALIGNMENT
	when relocating.
2024-04-01 23:00:52 +00:00

746 lines
31 KiB
Python
Raw Blame History

# Copyright (C) 2014-2024 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.
#
# Unusual variables checked by this code:
# NOP - four byte opcode for no-op (defaults to none)
# NO_SMALL_DATA - no .sbss/.sbss2/.sdata/.sdata2 sections if not
# empty.
# HAVE_NOINIT - Include a .noinit output section in the script.
# HAVE_PERSISTENT - Include a .persistent output section in the script.
# HAVE_DT_RELR - Include a .relr.dyn output section in the script.
# SMALL_DATA_CTOR - .ctors contains small data.
# SMALL_DATA_DTOR - .dtors contains small data.
# DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
# INITIAL_READONLY_SECTIONS - at start of text segment
# OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
# (e.g., .PARISC.milli)
# OTHER_TEXT_SECTIONS - these get put in .text when relocating
# INITIAL_READWRITE_SECTIONS - at start of data segment (after relro)
# OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
# (e.g., .PARISC.global)
# OTHER_RELRO_SECTIONS - other than .data.rel.ro ...
# (e.g. PPC32 .fixup, .got[12])
# OTHER_RELRO_SECTIONS_2 - as above, but after .dynamic in text segment
# OTHER_BSS_SECTIONS - other than .bss .sbss ...
# ATTRS_SECTIONS - at the end
# OTHER_SECTIONS - at the end
# EXECUTABLE_SYMBOLS - symbols that must be defined for an
# executable (e.g., _DYNAMIC_LINK)
# TEXT_START_ADDR - the first byte of the text segment, after any
# headers.
# TEXT_BASE_ADDRESS - the first byte of the text segment.
# TEXT_START_SYMBOLS - symbols that appear at the start of the
# .text section.
# DATA_START_SYMBOLS - symbols that appear at the start of the
# .data section.
# DATA_END_SYMBOLS - symbols that appear at the end of the
# writeable data sections.
# OTHER_GOT_SYMBOLS - symbols defined just before .got.
# OTHER_GOT_SECTIONS - sections just after .got.
# OTHER_PLT_SECTIONS - sections just after .plt.
# OTHER_SDATA_SECTIONS - sections just after .sdata.
# OTHER_BSS_SYMBOLS - symbols that appear at the start of the
# .bss section besides __bss_start.
# PLT_NEXT_DATA - .plt next to data segment when .plt is in text segment.
# DATA_PLT - .plt should be in data segment, not text segment.
# PLT_BEFORE_GOT - .plt just before .got when .plt is in data segement.
# BSS_PLT - .plt should be in bss segment
# NO_REL_RELOCS - Don't include .rel.* sections in script
# NO_RELA_RELOCS - Don't include .rela.* sections in script
# NON_ALLOC_DYN - Place dynamic sections after data segment.
# TEXT_DYNAMIC - .dynamic in text segment, not data segment.
# EMBEDDED - whether this is for an embedded system.
# SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set
# start address of shared library.
# INPUT_FILES - INPUT command of files to always include
# WRITABLE_RODATA - if set, the .rodata section should be writable
# INIT_START, INIT_END - statements just before and just after
# combination of .init sections.
# FINI_START, FINI_END - statements just before and just after
# combination of .fini sections.
# STACK_ADDR - start of a .stack section.
# OTHER_SYMBOLS - symbols to place right at the end of the script.
# ETEXT_NAME - name of a symbol for the end of the text section,
# normally etext.
# ETEXT_LAST_IN_RODATA_SEGMENT - emit ETEXT_NAME after all sections in
# the read-only data segment (which may or may not be equal to
# the code segment), instead of after just the code parts.
# SEPARATE_CODE - if set, .text and similar sections containing
# actual machine instructions must be in wholly disjoint
# pages from any other data, including headers
# SEPARATE_GOTPLT - if set, .got.plt should be separate output section,
# so that .got can be in the RELRO area. It should be set to
# the number of bytes in the beginning of .got.plt which can be
# in the RELRO area as well.
# USER_LABEL_PREFIX - prefix to add to user-visible symbols.
# RODATA_NAME, SDATA_NAME, SBSS_NAME, BSS_NAME - base parts of names
# for standard sections, without initial "." or suffixes.
# SYMBOL_ABI_ALIGNMENT - minimum alignment in bytes which needs to be
# applied to every symbol definition
#
# When adding sections, do note that the names of some sections are used
# when specifying the start address of the next.
#
# Many sections come in three flavours. There is the 'real' section,
# like ".data". Then there are the per-procedure or per-variable
# sections, generated by -ffunction-sections and -fdata-sections in GCC,
# and useful for --gc-sections, which for a variable "foo" might be
# ".data.foo". Then there are the linkonce sections, for which the linker
# eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
# The exact correspondences are:
#
# Section Linkonce section
# .text .gnu.linkonce.t.foo
# .rodata .gnu.linkonce.r.foo
# .data .gnu.linkonce.d.foo
# .bss .gnu.linkonce.b.foo
# .sdata .gnu.linkonce.s.foo
# .sbss .gnu.linkonce.sb.foo
# .sdata2 .gnu.linkonce.s2.foo
# .sbss2 .gnu.linkonce.sb2.foo
# .debug_info .gnu.linkonce.wi.foo
# .tdata .gnu.linkonce.td.foo
# .tbss .gnu.linkonce.tb.foo
# .lrodata .gnu.linkonce.lr.foo
# .ldata .gnu.linkonce.l.foo
# .lbss .gnu.linkonce.lb.foo
# .noinit .gnu.linkonce.n.foo
# .persistent .gnu.linkonce.p.foo
#
# Each of these can also have corresponding .rel.* and .rela.* sections.
if test -n "$NOP"; then
FILL="=$NOP"
else
FILL=
fi
test -n "$CREATE_SHLIB$CREATE_PIE" && CREATE_PIC=" "
test -z "$RODATA_NAME" && RODATA_NAME=rodata
test -z "$SDATA_NAME" && SDATA_NAME=sdata
test -z "$SBSS_NAME" && SBSS_NAME=sbss
test -z "$BSS_NAME" && BSS_NAME=bss
test -z "$ENTRY" && ENTRY=${USER_LABEL_PREFIX}_start
test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
test -z "${ELFSIZE}" && ELFSIZE=32
test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
test "$LD_FLAG" = "N" && DATA_ADDR=.
test -z "${ETEXT_NAME}" && ETEXT_NAME=${USER_LABEL_PREFIX}etext
test -n "$RELRO_NOW" && unset SEPARATE_GOTPLT
test -z "$ATTRS_SECTIONS" && ATTRS_SECTIONS=".gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }"
if test -z "$DATA_SEGMENT_ALIGN"; then
test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
DATA_SEGMENT_RELRO_END=""
DATA_SEGMENT_END=""
if test -n "${COMMONPAGESIZE}"; then
if test "${SEGMENT_SIZE}" != "${MAXPAGESIZE}"; then
DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
else
DATA_SEGMENT_ALIGN="DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
fi
DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
DATA_SEGMENT_RELRO_END=". = DATA_SEGMENT_RELRO_END (${SEPARATE_GOTPLT-0}, .);"
fi
fi
if test -z "${INITIAL_READONLY_SECTIONS}${CREATE_SHLIB}"; then
INITIAL_READONLY_SECTIONS=".interp ${RELOCATING-0} : { *(.interp) }"
fi
if test -z "$PLT"; then
IPLT=".iplt ${RELOCATING-0} : { *(.iplt) }"
PLT=".plt ${RELOCATING-0} : { *(.plt)${RELOCATING+${IREL_IN_PLT+ *(.iplt)}} }
${IREL_IN_PLT-$IPLT}"
fi
test -n "${DATA_PLT-${BSS_PLT-text}}" && TEXT_PLT=
if test -z "$GOT"; then
if test -z "$SEPARATE_GOTPLT"; then
GOT=".got ${RELOCATING-0} : {${RELOCATING+ *(.got.plt) *(.igot.plt)} *(.got)${RELOCATING+ *(.igot)} }"
else
GOT=".got ${RELOCATING-0} : { *(.got)${RELOCATING+ *(.igot)} }"
GOTPLT=".got.plt ${RELOCATING-0} : { *(.got.plt)${RELOCATING+ *(.igot.plt)} }"
fi
fi
def_symbol()
{
if [ -z "${SYMBOL_ABI_ALIGNMENT}" ]; then
echo "${USER_LABEL_PREFIX}$1 = ."
else
echo "${USER_LABEL_PREFIX}$1 = ALIGN(${SYMBOL_ABI_ALIGNMENT})"
fi
}
REL_IFUNC=".rel.ifunc ${RELOCATING-0} : { *(.rel.ifunc) }"
RELA_IFUNC=".rela.ifunc ${RELOCATING-0} : { *(.rela.ifunc) }"
REL_IPLT=".rel.iplt ${RELOCATING-0} :
{
${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN ($(def_symbol "__rel_iplt_start"));}}
*(.rel.iplt)
${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN ($(def_symbol "__rel_iplt_end"));}}
}"
RELA_IPLT=".rela.iplt ${RELOCATING-0} :
{
${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN ($(def_symbol "__rela_iplt_start"));}}
*(.rela.iplt)
${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN ($(def_symbol "__rela_iplt_end"));}}
}"
DYNAMIC=".dynamic ${RELOCATING-0} : { *(.dynamic) }"
RODATA=".${RODATA_NAME} ${RELOCATING-0} : { *(.${RODATA_NAME}${RELOCATING+ .${RODATA_NAME}.* .gnu.linkonce.r.*}) }"
DATARELRO=".data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro .data.rel.ro.* .gnu.linkonce.d.rel.ro.*) }"
DISCARDED="/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }"
if test -z "${NO_SMALL_DATA}"; then
SBSS=".${SBSS_NAME} ${RELOCATING-0} :
{
${RELOCATING+${SBSS_START_SYMBOLS}}
${CREATE_SHLIB+*(.${SBSS_NAME}2 .${SBSS_NAME}2.* .gnu.linkonce.sb2.*)}
${RELOCATING+*(.dyn${SBSS_NAME})}
*(.${SBSS_NAME}${RELOCATING+ .${SBSS_NAME}.* .gnu.linkonce.sb.*})
${RELOCATING+*(.scommon)}
${RELOCATING+${SBSS_END_SYMBOLS}}
}"
SBSS2=".${SBSS_NAME}2 ${RELOCATING-0} : { *(.${SBSS_NAME}2${RELOCATING+ .${SBSS_NAME}2.* .gnu.linkonce.sb2.*}) }"
SDATA="/* 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_NAME} ${RELOCATING-0} :
{
${RELOCATING+${SDATA_START_SYMBOLS}}
${CREATE_SHLIB+*(.${SDATA_NAME}2 .${SDATA_NAME}2.* .gnu.linkonce.s2.*)}
*(.${SDATA_NAME}${RELOCATING+ .${SDATA_NAME}.* .gnu.linkonce.s.*})
}"
SDATA2=".${SDATA_NAME}2 ${RELOCATING-0} :
{
${RELOCATING+${SDATA2_START_SYMBOLS}}
*(.${SDATA_NAME}2${RELOCATING+ .${SDATA_NAME}2.* .gnu.linkonce.s2.*})
}"
REL_SDATA=".rel.${SDATA_NAME} ${RELOCATING-0} : { *(.rel.${SDATA_NAME}${RELOCATING+ .rel.${SDATA_NAME}.* .rel.gnu.linkonce.s.*}) }
.rela.${SDATA_NAME} ${RELOCATING-0} : { *(.rela.${SDATA_NAME}${RELOCATING+ .rela.${SDATA_NAME}.* .rela.gnu.linkonce.s.*}) }"
REL_SBSS=".rel.${SBSS_NAME} ${RELOCATING-0} : { *(.rel.${SBSS_NAME}${RELOCATING+ .rel.${SBSS_NAME}.* .rel.gnu.linkonce.sb.*}) }
.rela.${SBSS_NAME} ${RELOCATING-0} : { *(.rela.${SBSS_NAME}${RELOCATING+ .rela.${SBSS_NAME}.* .rela.gnu.linkonce.sb.*}) }"
REL_SDATA2=".rel.${SDATA_NAME}2 ${RELOCATING-0} : { *(.rel.${SDATA_NAME}2${RELOCATING+ .rel.${SDATA_NAME}2.* .rel.gnu.linkonce.s2.*}) }
.rela.${SDATA_NAME}2 ${RELOCATING-0} : { *(.rela.${SDATA_NAME}2${RELOCATING+ .rela.${SDATA_NAME}2.* .rela.gnu.linkonce.s2.*}) }"
REL_SBSS2=".rel.${SBSS_NAME}2 ${RELOCATING-0} : { *(.rel.${SBSS_NAME}2${RELOCATING+ .rel.${SBSS_NAME}2.* .rel.gnu.linkonce.sb2.*}) }
.rela.${SBSS_NAME}2 ${RELOCATING-0} : { *(.rela.${SBSS_NAME}2${RELOCATING+ .rela.${SBSS_NAME}2.* .rela.gnu.linkonce.sb2.*}) }"
else
NO_SMALL_DATA=" "
fi
if test -z "${SDATA_GOT}${DATA_GOT}"; then
if test -n "${NO_SMALL_DATA}"; then
DATA_GOT=" "
fi
fi
if test -z "${SDATA_GOT}${DATA_GOT}"; then
if test -z "${NO_SMALL_DATA}"; then
SDATA_GOT=" "
fi
fi
test -n "$SEPARATE_GOTPLT" && SEPARATE_GOTPLT=" "
test "${LARGE_SECTIONS}" = "yes" && REL_LARGE="
.rel.ldata ${RELOCATING-0} : { *(.rel.ldata${RELOCATING+ .rel.ldata.* .rel.gnu.linkonce.l.*}) }
.rela.ldata ${RELOCATING-0} : { *(.rela.ldata${RELOCATING+ .rela.ldata.* .rela.gnu.linkonce.l.*}) }
.rel.lbss ${RELOCATING-0} : { *(.rel.lbss${RELOCATING+ .rel.lbss.* .rel.gnu.linkonce.lb.*}) }
.rela.lbss ${RELOCATING-0} : { *(.rela.lbss${RELOCATING+ .rela.lbss.* .rela.gnu.linkonce.lb.*}) }
.rel.lrodata ${RELOCATING-0} : { *(.rel.lrodata${RELOCATING+ .rel.lrodata.* .rel.gnu.linkonce.lr.*}) }
.rela.lrodata ${RELOCATING-0} : { *(.rela.lrodata${RELOCATING+ .rela.lrodata.* .rela.gnu.linkonce.lr.*}) }"
test "${LARGE_SECTIONS}" = "yes" && LARGE_BSS="
.lbss ${RELOCATING-0} :
{
${RELOCATING+*(.dynlbss)}
*(.lbss${RELOCATING+ .lbss.* .gnu.linkonce.lb.*})
${RELOCATING+*(LARGE_COMMON)}
}"
test "${LARGE_SECTIONS}" = "yes" && LARGE_SECTIONS="
.lrodata ${RELOCATING-0} ${RELOCATING+ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))} :
{
*(.lrodata${RELOCATING+ .lrodata.* .gnu.linkonce.lr.*})
}
.ldata ${RELOCATING-0} ${RELOCATING+ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))} :
{
*(.ldata${RELOCATING+ .ldata.* .gnu.linkonce.l.*})
${RELOCATING+. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
}"
if test "${ENABLE_INITFINI_ARRAY}" = "yes"; then
SORT_INIT_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))"
SORT_FINI_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))"
CTORS_IN_INIT_ARRAY="EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors"
DTORS_IN_FINI_ARRAY="EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors"
else
SORT_INIT_ARRAY="KEEP (*(SORT(.init_array.*)))"
SORT_FINI_ARRAY="KEEP (*(SORT(.fini_array.*)))"
CTORS_IN_INIT_ARRAY=
DTORS_IN_FINI_ARRAY=
fi
PREINIT_ARRAY=".preinit_array :
{
${CREATE_SHLIB-PROVIDE_HIDDEN ($(def_symbol "__preinit_array_start"));}
KEEP (*(.preinit_array))
${CREATE_SHLIB-PROVIDE_HIDDEN ($(def_symbol "__preinit_array_end"));}
}"
INIT_ARRAY=".init_array :
{
${CREATE_SHLIB-PROVIDE_HIDDEN ($(def_symbol "__init_array_start"));}
${SORT_INIT_ARRAY}
KEEP (*(.init_array ${CTORS_IN_INIT_ARRAY}))
${CREATE_SHLIB-PROVIDE_HIDDEN ($(def_symbol "__init_array_end"));}
}"
FINI_ARRAY=".fini_array :
{
${CREATE_SHLIB-PROVIDE_HIDDEN ($(def_symbol "__fini_array_start"));}
${SORT_FINI_ARRAY}
KEEP (*(.fini_array ${DTORS_IN_FINI_ARRAY}))
${CREATE_SHLIB-PROVIDE_HIDDEN ($(def_symbol "__fini_array_end"));}
}"
CTOR=".ctors ${CONSTRUCTING-0} :
{
${CONSTRUCTING+${CTOR_START}}
/* 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 $OTHER_EXCLUDE_FILES) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
${CONSTRUCTING+${CTOR_END}}
}"
DTOR=".dtors ${CONSTRUCTING-0} :
{
${CONSTRUCTING+${DTOR_START}}
KEEP (*crtbegin.o(.dtors))
KEEP (*crtbegin?.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
${CONSTRUCTING+${DTOR_END}}
}"
STACK=".stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
{
${RELOCATING+$(def_symbol "_stack");}
*(.stack)
${RELOCATING+${STACK_SENTINEL}}
}"
test "${HAVE_NOINIT}" = "yes" && NOINIT="
/* This section contains data that is not initialized during load,
or during the application's initialization sequence. */
.noinit ${RELOCATING-0} (NOLOAD) : ${RELOCATING+ALIGN(${ALIGNMENT})}
{
${RELOCATING+PROVIDE (__noinit_start = .);}
*(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
${RELOCATING+. = ALIGN(${ALIGNMENT});}
${RELOCATING+PROVIDE (__noinit_end = .);}
}"
test "${HAVE_PERSISTENT}" = "yes" && PERSISTENT="
/* This section contains data that is initialized during load,
but not during the application's initialization sequence. */
.persistent ${RELOCATING-0} : ${RELOCATING+ALIGN(${ALIGNMENT})}
{
${RELOCATING+PROVIDE (__persistent_start = .);}
*(.persistent${RELOCATING+ .persistent.* .gnu.linkonce.p.*})
${RELOCATING+. = ALIGN(${ALIGNMENT});}
${RELOCATING+PROVIDE (__persistent_end = .);}
}"
TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${TEXT_START_ADDR})"
SHLIB_TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${SHLIB_TEXT_START_ADDR:-0})"
# Don't bother with separate code segment when there are data sections
# between .plt and .text.
if test -z "$TINY_READONLY_SECTION"; then
case "$LD_FLAG" in
*textonly*)
SEPARATE_TEXT=" "
TEXT_SEGMENT_ALIGN=". = ALIGN(${MAXPAGESIZE});"
;;
esac
fi
if [ -z "$SEPARATE_CODE" ]; then
SIZEOF_HEADERS_CODE=" + SIZEOF_HEADERS"
else
SIZEOF_HEADERS_CODE=
fi
# If this is for an embedded system, don't add SIZEOF_HEADERS.
if [ -z "$EMBEDDED" ]; then
test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}${SIZEOF_HEADERS_CODE}"
else
test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
fi
cat <<EOF
/* Copyright (C) 2014-2024 Free Software Foundation, Inc.
Copying and distribution of this script, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved. */
OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
"${LITTLE_OUTPUT_FORMAT}")
OUTPUT_ARCH(${OUTPUT_ARCH})
${RELOCATING+ENTRY(${ENTRY})}
${RELOCATING+${LIB_SEARCH_DIRS}}
${RELOCATING+${CREATE_SHLIB-${EXECUTABLE_SYMBOLS}}}
${RELOCATING+${INPUT_FILES}}
${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
{
${RELOCATING+${SEPARATE_TEXT-/* Read-only sections, merged into text segment: */}}
${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+PROVIDE (__executable_start = ${TEXT_START_ADDR}); . = ${TEXT_BASE_ADDRESS};}}}
${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR}${SIZEOF_HEADERS_CODE};}}
${CREATE_PIE+${RELOCATING+PROVIDE (__executable_start = ${SHLIB_TEXT_START_ADDR}); . = ${SHLIB_TEXT_START_ADDR}${SIZEOF_HEADERS_CODE};}}
EOF
emit_early_ro()
{
cat <<EOF
${INITIAL_READONLY_SECTIONS}
.note.gnu.build-id ${RELOCATING-0}: { *(.note.gnu.build-id) }
EOF
}
test -n "${SEPARATE_CODE}" || emit_early_ro
test -n "${RELOCATING+0}" || unset NON_ALLOC_DYN
test -z "${NON_ALLOC_DYN}" || TEXT_DYNAMIC=
cat > ldscripts/dyntmp.$$ <<EOF
${TEXT_DYNAMIC+${DYNAMIC}}
.hash ${RELOCATING-0} : { *(.hash) }
.gnu.hash ${RELOCATING-0} : { *(.gnu.hash) }
.dynsym ${RELOCATING-0} : { *(.dynsym) }
.dynstr ${RELOCATING-0} : { *(.dynstr) }
.gnu.version ${RELOCATING-0} : { *(.gnu.version) }
.gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
.gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
EOF
if [ "x$COMBRELOC" = x ]; then
COMBRELOCCAT="cat >> ldscripts/dyntmp.$$"
else
COMBRELOCCAT="cat > $COMBRELOC"
fi
eval $COMBRELOCCAT <<EOF
${INITIAL_RELOC_SECTIONS}
.rel.init ${RELOCATING-0} : { *(.rel.init) }
.rela.init ${RELOCATING-0} : { *(.rela.init) }
.rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
.rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
.rel.fini ${RELOCATING-0} : { *(.rel.fini) }
.rela.fini ${RELOCATING-0} : { *(.rela.fini) }
.rel.${RODATA_NAME} ${RELOCATING-0} : { *(.rel.${RODATA_NAME}${RELOCATING+ .rel.${RODATA_NAME}.* .rel.gnu.linkonce.r.*}) }
.rela.${RODATA_NAME} ${RELOCATING-0} : { *(.rela.${RODATA_NAME}${RELOCATING+ .rela.${RODATA_NAME}.* .rela.gnu.linkonce.r.*}) }
${OTHER_READONLY_RELOC_SECTIONS}
.rel.data.rel.ro ${RELOCATING-0} : { *(.rel.data.rel.ro${RELOCATING+ .rel.data.rel.ro.* .rel.gnu.linkonce.d.rel.ro.*}) }
.rela.data.rel.ro ${RELOCATING-0} : { *(.rela.data.rel.ro${RELOCATING+ .rela.data.rel.ro.* .rela.gnu.linkonce.d.rel.ro.*}) }
.rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
.rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
${OTHER_READWRITE_RELOC_SECTIONS}
.rel.tdata ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
.rela.tdata ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
.rel.tbss ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
.rela.tbss ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
.rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
.rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
.rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
.rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
.rel.got ${RELOCATING-0} : { *(.rel.got) }
.rela.got ${RELOCATING-0} : { *(.rela.got) }
${OTHER_GOT_RELOC_SECTIONS}
${REL_SDATA}
${REL_SBSS}
${REL_SDATA2}
${REL_SBSS2}
.rel.${BSS_NAME} ${RELOCATING-0} : { *(.rel.${BSS_NAME}${RELOCATING+ .rel.${BSS_NAME}.* .rel.gnu.linkonce.b.*}) }
.rela.${BSS_NAME} ${RELOCATING-0} : { *(.rela.${BSS_NAME}${RELOCATING+ .rela.${BSS_NAME}.* .rela.gnu.linkonce.b.*}) }
${REL_LARGE}
${IREL_IN_PLT+$REL_IFUNC}
${IREL_IN_PLT+$RELA_IFUNC}
${IREL_IN_PLT-$REL_IPLT}
${IREL_IN_PLT-$RELA_IPLT}
EOF
if [ -n "$COMBRELOC" ]; then
cat >> ldscripts/dyntmp.$$ <<EOF
.rel.dyn ${RELOCATING-0} :
{
EOF
sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;/__rela_iplt_/d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC >> ldscripts/dyntmp.$$
cat >> ldscripts/dyntmp.$$ <<EOF
}
.rela.dyn ${RELOCATING-0} :
{
EOF
sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;/__rel_iplt_/d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC >> ldscripts/dyntmp.$$
cat >> ldscripts/dyntmp.$$ <<EOF
}
EOF
fi
cat >> ldscripts/dyntmp.$$ <<EOF
.rel.plt ${RELOCATING-0} :
{
*(.rel.plt)
${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN ($(def_symbol "__rel_iplt_start"));}}}
${IREL_IN_PLT+${RELOCATING+*(.rel.iplt)}}
${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN ($(def_symbol "__rel_iplt_end"));}}}
}
.rela.plt ${RELOCATING-0} :
{
*(.rela.plt)
${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN ($(def_symbol "__rela_iplt_start"));}}}
${IREL_IN_PLT+${RELOCATING+*(.rela.iplt)}}
${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN ($(def_symbol "__rela_iplt_end"));}}}
}
${OTHER_PLT_RELOC_SECTIONS}
EOF
emit_dyn()
{
if test -z "${NO_REL_RELOCS}${NO_RELA_RELOCS}"; then
cat ldscripts/dyntmp.$$
else
if test -z "${NO_REL_RELOCS}"; then
sed -e '/^[ ]*\.rela\.[^}]*$/,/}/d;/^[ ]*\.rela\./d;/__rela_iplt_/d' ldscripts/dyntmp.$$
fi
if test -z "${NO_RELA_RELOCS}"; then
sed -e '/^[ ]*\.rel\.[^}]*$/,/}/d;/^[ ]*\.rel\./d;/__rel_iplt_/d' ldscripts/dyntmp.$$
fi
fi
rm -f ldscripts/dyntmp.$$
if test -n "${HAVE_DT_RELR}"; then
echo " .relr.dyn : { *(.relr.dyn) }"
fi
}
test -n "${NON_ALLOC_DYN}${SEPARATE_CODE}" || emit_dyn
cat <<EOF
${RELOCATING+${TEXT_SEGMENT_ALIGN}}
.init ${RELOCATING-0}${RELOCATING+${INIT_ADDR}} :
{
${RELOCATING+${INIT_START}}
KEEP (*(SORT_NONE(.init)))
${RELOCATING+${INIT_END}}
} ${FILL}
${TEXT_PLT+${PLT_NEXT_DATA-${PLT} ${OTHER_PLT_SECTIONS}}}
${TINY_READONLY_SECTION}
.text ${RELOCATING-0} :
{
${RELOCATING+${TEXT_START_SYMBOLS}}
${RELOCATING+*(.text.unlikely .text.*_unlikely .text.unlikely.*)}
${RELOCATING+*(.text.exit .text.exit.*)}
${RELOCATING+*(.text.startup .text.startup.*)}
${RELOCATING+*(.text.hot .text.hot.*)}
${RELOCATING+*(SORT(.text.sorted.*))}
*(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
/* .gnu.warning sections are handled specially by elf.em. */
*(.gnu.warning)
${RELOCATING+${OTHER_TEXT_SECTIONS}}
} ${FILL}
.fini ${RELOCATING-0}${RELOCATING+${FINI_ADDR}} :
{
${RELOCATING+${FINI_START}}
KEEP (*(SORT_NONE(.fini)))
${RELOCATING+${FINI_END}}
} ${FILL}
${RELOCATING+${ETEXT_LAST_IN_RODATA_SEGMENT-PROVIDE (__${ETEXT_NAME} = .);}}
${RELOCATING+${ETEXT_LAST_IN_RODATA_SEGMENT-PROVIDE (_${ETEXT_NAME} = .);}}
${RELOCATING+${ETEXT_LAST_IN_RODATA_SEGMENT-PROVIDE (${ETEXT_NAME} = .);}}
${RELOCATING+${TEXT_SEGMENT_ALIGN}}
EOF
if test -n "${SEPARATE_CODE}${SEPARATE_TEXT}"; then
if test -n "${RODATA_ADDR}"; then
RODATA_ADDR="\
SEGMENT_START(\"rodata-segment\", ${RODATA_ADDR}) + SIZEOF_HEADERS"
else
RODATA_ADDR="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
RODATA_ADDR="SEGMENT_START(\"rodata-segment\", ${RODATA_ADDR})"
fi
if test -n "${SHLIB_RODATA_ADDR}"; then
SHLIB_RODATA_ADDR="\
SEGMENT_START(\"rodata-segment\", ${SHLIB_RODATA_ADDR}) + SIZEOF_HEADERS"
else
SHLIB_RODATA_ADDR="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
SHLIB_RODATA_ADDR="SEGMENT_START(\"rodata-segment\", ${SHLIB_RODATA_ADDR})"
fi
cat <<EOF
${RELOCATING+/* Adjust the address for the rodata segment. We want to adjust up to
the same address within the page on the next page up. */
${CREATE_SHLIB-${CREATE_PIE-. = ${RODATA_ADDR};}}
${CREATE_SHLIB+. = ${SHLIB_RODATA_ADDR};}
${CREATE_PIE+. = ${SHLIB_RODATA_ADDR};}}
EOF
if test -n "${SEPARATE_CODE}"; then
emit_early_ro
emit_dyn
fi
fi
cat <<EOF
${WRITABLE_RODATA-${RODATA}}
.${RODATA_NAME}1 ${RELOCATING-0} : { *(.${RODATA_NAME}1) }
${CREATE_SHLIB-${SDATA2}}
${CREATE_SHLIB-${SBSS2}}
${OTHER_READONLY_SECTIONS}
.eh_frame_hdr ${RELOCATING-0} : { *(.eh_frame_hdr)${RELOCATING+ *(.eh_frame_entry .eh_frame_entry.*)} }
.eh_frame ${RELOCATING-0} : ONLY_IF_RO { KEEP (*(.eh_frame))${RELOCATING+ *(.eh_frame.*)} }
.sframe ${RELOCATING-0} : ONLY_IF_RO { *(.sframe)${RELOCATING+ *(.sframe.*)} }
.gcc_except_table ${RELOCATING-0} : ONLY_IF_RO { *(.gcc_except_table${RELOCATING+ .gcc_except_table.*}) }
.gnu_extab ${RELOCATING-0} : ONLY_IF_RO { *(.gnu_extab*) }
/* These sections are generated by the Sun/Oracle C++ compiler. */
.exception_ranges ${RELOCATING-0} : ONLY_IF_RO { *(.exception_ranges${RELOCATING+*}) }
${TEXT_PLT+${PLT_NEXT_DATA+${PLT} ${OTHER_PLT_SECTIONS}}}
${RELOCATING+${ETEXT_LAST_IN_RODATA_SEGMENT+PROVIDE (__${ETEXT_NAME} = .);}}
${RELOCATING+${ETEXT_LAST_IN_RODATA_SEGMENT+PROVIDE (_${ETEXT_NAME} = .);}}
${RELOCATING+${ETEXT_LAST_IN_RODATA_SEGMENT+PROVIDE (${ETEXT_NAME} = .);}}
${RELOCATING+/* Adjust the address for the data segment. We want to adjust up to
the same address within the page on the next page up. */}
${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
${CREATE_SHLIB+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}
${CREATE_PIE+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}
/* Exception handling */
.eh_frame ${RELOCATING-0} : ONLY_IF_RW { KEEP (*(.eh_frame))${RELOCATING+ *(.eh_frame.*)} }
.sframe ${RELOCATING-0} : ONLY_IF_RW { *(.sframe)${RELOCATING+ *(.sframe.*)} }
.gnu_extab ${RELOCATING-0} : ONLY_IF_RW { *(.gnu_extab) }
.gcc_except_table ${RELOCATING-0} : ONLY_IF_RW { *(.gcc_except_table${RELOCATING+ .gcc_except_table.*}) }
.exception_ranges ${RELOCATING-0} : ONLY_IF_RW { *(.exception_ranges${RELOCATING+*}) }
/* Thread Local Storage sections */
.tdata ${RELOCATING-0} :
{
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN ($(def_symbol "__tdata_start"));}}
*(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*})
}
.tbss ${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
${RELOCATING+${PREINIT_ARRAY}}
${RELOCATING+${INIT_ARRAY}}
${RELOCATING+${FINI_ARRAY}}
${SMALL_DATA_CTOR-${RELOCATING+${CTOR}}}
${SMALL_DATA_DTOR-${RELOCATING+${DTOR}}}
.jcr ${RELOCATING-0} : { KEEP (*(.jcr)) }
${RELOCATING+${DATARELRO}}
${OTHER_RELRO_SECTIONS}
${TEXT_DYNAMIC-${DYNAMIC}}
${OTHER_RELRO_SECTIONS_2}
${DATA_GOT+${RELRO_NOW+${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}}}
${DATA_GOT+${RELRO_NOW+${GOT}}}
${DATA_GOT+${RELRO_NOW+${GOTPLT}}}
${DATA_GOT+${RELRO_NOW-${SEPARATE_GOTPLT+${GOT}}}}
${RELOCATING+${DATA_SEGMENT_RELRO_END}}
${INITIAL_READWRITE_SECTIONS}
${DATA_SDATA+${SDATA}}
${DATA_SDATA+${OTHER_SDATA_SECTIONS}}
${DATA_SDATA+${SBSS}}
${DATA_GOT+${RELRO_NOW-${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}}}
${DATA_GOT+${RELRO_NOW-${SEPARATE_GOTPLT-${GOT}}}}
${DATA_GOT+${RELRO_NOW-${GOTPLT}}}
${DATA_PLT+${PLT_BEFORE_GOT-${PLT}}}
.data ${RELOCATING-0}${RELOCATING+${DATA_SECTION_ALIGNMENT}} :
{
${RELOCATING+${DATA_START_SYMBOLS}}
*(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
${CONSTRUCTING+SORT(CONSTRUCTORS)}
}
.data1 ${RELOCATING-0} : { *(.data1) }
${WRITABLE_RODATA+${RODATA}}
${OTHER_READWRITE_SECTIONS}
${SMALL_DATA_CTOR+${RELOCATING+${CTOR}}}
${SMALL_DATA_DTOR+${RELOCATING+${DTOR}}}
${SDATA_GOT+${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}}
${SDATA_GOT+${RELOCATING+${OTHER_GOT_SYMBOLS+. = .; ${OTHER_GOT_SYMBOLS}}}}
${SDATA_GOT+${GOT}}
${SDATA_GOT+${OTHER_GOT_SECTIONS}}
${DATA_SDATA-${SDATA}}
${DATA_SDATA-${OTHER_SDATA_SECTIONS}}
${RELOCATING+${SYMBOL_ABI_ALIGNMENT+. = ALIGN(${SYMBOL_ABI_ALIGNMENT});}}
${RELOCATING+${DATA_END_SYMBOLS-${CREATE_SHLIB+PROVIDE (}$(def_symbol "_edata")${CREATE_SHLIB+)}; PROVIDE ($(def_symbol "edata"));}}
${PERSISTENT}
${RELOCATING+. = ALIGN(ALIGNOF(NEXT_SECTION));}
${RELOCATING+${CREATE_SHLIB+PROVIDE (}$(def_symbol "__bss_start")${CREATE_SHLIB+)};}
${RELOCATING+${OTHER_BSS_SYMBOLS}}
${DATA_SDATA-${SBSS}}
${BSS_PLT+${PLT}}
.${BSS_NAME} ${RELOCATING-0} :
{
${RELOCATING+*(.dynbss)}
*(.${BSS_NAME}${RELOCATING+ .${BSS_NAME}.* .gnu.linkonce.b.*})
${RELOCATING+*(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 do not
pad the .data section. */
. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
}
${OTHER_BSS_SECTIONS}
${LARGE_BSS_AFTER_BSS+${LARGE_BSS}}
${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
${NOINIT}
${RELOCATING+. = ALIGN(${ALIGNMENT});}
EOF
LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\", ${LARGE_DATA_ADDR-.});"
SHLIB_LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\", ${SHLIB_LARGE_DATA_ADDR-.});"
cat <<EOF
${RELOCATING+${CREATE_SHLIB-${CREATE_PIE-${LARGE_DATA_ADDR}}}}
${CREATE_SHLIB+${SHLIB_LARGE_DATA_ADDR}}
${CREATE_PIE+${SHLIB_LARGE_DATA_ADDR}}
${LARGE_SECTIONS}
${LARGE_BSS_AFTER_BSS-${LARGE_BSS}}
${RELOCATING+. = ALIGN(${ALIGNMENT});}
${RELOCATING+${OTHER_END_SYMBOLS}}
${RELOCATING+${END_SYMBOLS-${CREATE_SHLIB+PROVIDE (}$(def_symbol "_end")${CREATE_SHLIB+)}; PROVIDE ($(def_symbol "end"));}}
${RELOCATING+${DATA_SEGMENT_END}}
${TINY_DATA_SECTION}
${TINY_BSS_SECTION}
${STACK_ADDR+${STACK}}
EOF
test -z "${NON_ALLOC_DYN}" || emit_dyn
source_sh $srcdir/scripttempl/misc-sections.sc
source_sh $srcdir/scripttempl/DWARF.sc
cat <<EOF
${ATTRS_SECTIONS}
${OTHER_SECTIONS}
${RELOCATING+${OTHER_SYMBOLS}}
${RELOCATING+${DISCARDED}}
}
EOF
Reference in New Issue View Git Blame Copy Permalink