package/gcc: transition PowerPC 32 to secureplt
PowerPC has two PLT models: BSS-PLT and Secure-PLT. BSS-PLT uses runtime code generation to generate the PLT stubs. Secure-PLT was introduced with GCC 4.1 and Binutils 2.17 (base has GCC 4.2.1 and Binutils 2.17), and is a more secure PLT format, using a read-only linkage table, with the dynamic linker populating a non-executable index table. References to other distro/BSD transitions: https://patchwork.openembedded.org/patch/106621/ https://reviews.freebsd.org/D20598 Fixes a bug observed when creating SELinux policy where all apps require execmem because the heap requires execute before this change. Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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@ -223,6 +223,13 @@ HOST_GCC_COMMON_CONF_OPTS += \
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--with-long-double-128
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endif
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# Set default to Secure-PLT to prevent run-time
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# generation of PLT stubs (supports RELRO and
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# SELinux non-exemem capabilities)
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ifeq ($(BR2_powerpc),y)
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HOST_GCC_COMMON_CONF_OPTS += --enable-secureplt
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endif
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# PowerPC64 big endian by default uses the elfv1 ABI, and PowerPC 64
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# little endian by default uses the elfv2 ABI. However, musl has
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# decided to use the elfv2 ABI for both, so we force the elfv2 ABI for
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