mirror of
https://github.com/dynup/kpatch
synced 2025-01-10 15:19:26 +00:00
b1cdc83d57
Introduce a second phase in the kpatch-build process that creates kpatch modules or livepatch modules that use the new klp rela sections depending on the kernel version being worked on. This change uses the two new programs to either create a patch module that uses dynrelas (create-kpatch-module) or a patch module that uses klp rela and arch sections + klp symbols marked with the correct Elf flags (create-klp-module). For klp patch modules, the --unique flag for ld is needed to prevent .parainstructions and .altinstructions sections from different objects from being merged, as arch_klp_init_object_loaded() applies these sections per-object.
38 lines
1.1 KiB
ArmAsm
38 lines
1.1 KiB
ArmAsm
__kpatch_funcs = ADDR(.kpatch.funcs);
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__kpatch_funcs_end = ADDR(.kpatch.funcs) + SIZEOF(.kpatch.funcs);
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#ifdef __KPATCH_MODULE__
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__kpatch_dynrelas = ADDR(.kpatch.dynrelas);
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__kpatch_dynrelas_end = ADDR(.kpatch.dynrelas) + SIZEOF(.kpatch.dynrelas);
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__kpatch_checksum = ADDR(.kpatch.checksum);
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#endif
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SECTIONS
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{
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.kpatch.hooks.load : {
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__kpatch_hooks_load = . ;
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*(.kpatch.hooks.load)
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__kpatch_hooks_load_end = . ;
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/*
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* Pad the end of the section with zeros in case the section is empty.
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* This prevents the kernel from discarding the section at module
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* load time. __kpatch_hooks_load_end will still point to the end of
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* the section before the padding. If the .kpatch.hooks.load section
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* is empty, __kpatch_hooks_load equals __kpatch_hooks_load_end.
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*/
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QUAD(0);
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}
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.kpatch.hooks.unload : {
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__kpatch_hooks_unload = . ;
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*(.kpatch.hooks.unload)
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__kpatch_hooks_unload_end = . ;
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QUAD(0);
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}
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.kpatch.force : {
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__kpatch_force_funcs = . ;
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*(.kpatch.force)
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__kpatch_force_funcs_end = . ;
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QUAD(0);
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}
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}
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