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Refresh ARM FDPIC ldso with XIP-aware relocation #17

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Merged
jserv merged 1 commit into from
May 4, 2026
+2,425 −0
Merged

Refresh ARM FDPIC ldso with XIP-aware relocation #17

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8 changes: 8 additions & 0 deletions build.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -433,6 +433,14 @@ build_uClibc() {
cp configs/uClibc-ng-${UCLIBC_NG_VERSION}-${FLAVOR}.config uClibc-ng-${UCLIBC_NG_VERSION}/.config
cd uClibc-ng-${UCLIBC_NG_VERSION}

# FDPIC ldso refresh: descriptor allocator, eager binding, XIP policy
# plus 0022 follow-up that broadens the writable-text gate and
# replaces additive end-address checks with subtraction-based bounds.
for p in ../patches/0021-ldso-arm-fdpic-*.patch ../patches/0022-ldso-arm-fdpic-*.patch; do
[ -f "${p}" ] || continue
apply_patch_once "${p}"
done

TOOLCHAIN_ESCAPED=$(echo ${TOOLCHAIN}/${TARGET} | sed 's/\//\\\//g')
sed -i "s/^KERNEL_HEADERS=.*\$/KERNEL_HEADERS=\"${TOOLCHAIN_ESCAPED}\/include\"/" .config
# Use a target-relative runtime prefix so PT_INTERP inside built ELFs
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