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ld: Don't define __rel[a]_iplt_start/__rel[a]_iplt_end in PIE

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__rel[a]_iplt_start and __rel[a]_iplt_end are defined to handle IFUNC in
static executables.  For PIE, since IFUNC is handled as the part of the
normal dynamic relocation processing, there is no need to define these
symbols in PIE.

	* scripttempl/elf.sc (CREATE_PIC): New.  Set for CREATE_SHLIB or
	CREATE_PIE.
	(__rel_iplt_start): Don't define for CREATE_PIC.
	(__rel_iplt_end): Likewise.
	(__rela_iplt_start): Likewise.
	(__rela_iplt_end): Likewise.
This commit is contained in:
H.J. Lu
2019-04-10 18:36:05 -07:00
parent 3f52fdbcb5
commit 795e3bb7de
2 changed files with 18 additions and 8 deletions
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17
ld/scripttempl/elf.sc
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@@ -109,6 +109,7 @@ 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
@@ -160,15 +161,15 @@ REL_IFUNC=".rel.ifunc ${RELOCATING-0} : { *(.rel.ifunc) }"
RELA_IFUNC=".rela.ifunc ${RELOCATING-0} : { *(.rela.ifunc) }"
REL_IPLT=".rel.iplt ${RELOCATING-0} :
{
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_start = .);}}
${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_start = .);}}
*(.rel.iplt)
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_end = .);}}
${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_end = .);}}
}"
RELA_IPLT=".rela.iplt ${RELOCATING-0} :
{
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_start = .);}}
${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_start = .);}}
*(.rela.iplt)
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_end = .);}}
${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_end = .);}}
}"
DYNAMIC=".dynamic ${RELOCATING-0} : { *(.dynamic) }"
RODATA=".${RODATA_NAME} ${RELOCATING-0} : { *(.${RODATA_NAME}${RELOCATING+ .${RODATA_NAME}.* .gnu.linkonce.r.*}) }"
@@ -463,16 +464,16 @@ cat >> ldscripts/dyntmp.$$ <<EOF
.rel.plt ${RELOCATING-0} :
{
*(.rel.plt)
${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_start = .);}}}
${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_start = .);}}}
${IREL_IN_PLT+${RELOCATING+*(.rel.iplt)}}
${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_end = .);}}}
${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rel_iplt_end = .);}}}
}
.rela.plt ${RELOCATING-0} :
{
*(.rela.plt)
${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_start = .);}}}
${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_start = .);}}}
${IREL_IN_PLT+${RELOCATING+*(.rela.iplt)}}
${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_end = .);}}}
${IREL_IN_PLT+${RELOCATING+${CREATE_PIC-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__rela_iplt_end = .);}}}
}
${OTHER_PLT_RELOC_SECTIONS}
EOF