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| author | Helge Deller <deller@gmx.de> | 2018-11-10 16:14:59 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2018-12-10 07:47:50 +0100 |
| commit | 8cc28269b9574103aae9088a02a20929ec75f983 (patch) | |
| tree | 17847e628ee8aaf6d6b5dbcd5d1a652211d09adf /arch/parisc/kernel/module.c | |
| parent | 40e020c129cfc991e8ab4736d2665351ffd1468d (diff) | |
| download | lwn-8cc28269b9574103aae9088a02a20929ec75f983.tar.gz lwn-8cc28269b9574103aae9088a02a20929ec75f983.zip | |
parisc: Split out alternative live patching code
Move the alternative implemenation coding to alternative.c and add code to
patch modules while loading.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/kernel/module.c')
| -rw-r--r-- | arch/parisc/kernel/module.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/parisc/kernel/module.c b/arch/parisc/kernel/module.c index b5b3cb00f1fb..43778420614b 100644 --- a/arch/parisc/kernel/module.c +++ b/arch/parisc/kernel/module.c @@ -877,6 +877,8 @@ int module_finalize(const Elf_Ehdr *hdr, int i; unsigned long nsyms; const char *strtab = NULL; + const Elf_Shdr *s; + char *secstrings; Elf_Sym *newptr, *oldptr; Elf_Shdr *symhdr = NULL; #ifdef DEBUG @@ -948,6 +950,18 @@ int module_finalize(const Elf_Ehdr *hdr, nsyms = newptr - (Elf_Sym *)symhdr->sh_addr; DEBUGP("NEW num_symtab %lu\n", nsyms); symhdr->sh_size = nsyms * sizeof(Elf_Sym); + + /* find .altinstructions section */ + secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { + void *aseg = (void *) s->sh_addr; + char *secname = secstrings + s->sh_name; + + if (!strcmp(".altinstructions", secname)) + /* patch .altinstructions */ + apply_alternatives(aseg, aseg + s->sh_size, me->name); + } + return 0; } |