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module: switch to execmem API for remapping as RW and restoring ROX

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Instead of using writable copy for module text sections, temporarily remap
the memory allocated from execmem's ROX cache as writable and restore its
ROX permissions after the module is formed.

This will allow removing nasty games with writable copy in alternatives
patching on x86.

Signed-off-by: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250126074733.1384926-7-rppt@kernel.org
This commit is contained in:
Mike Rapoport (Microsoft)
2025-01-26 09:47:30 +02:00
committed by Peter Zijlstra
parent 05e555b817
commit c287c07233
4 changed files with 27 additions and 72 deletions
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4
include/linux/moduleloader.h
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@@ -108,10 +108,6 @@ int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *mod);
int module_post_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *mod);
#ifdef CONFIG_MODULES
void flush_module_init_free_work(void);
#else