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Message-Id: <27d75debd6e4ddeaffe1d66ffed1e7526684a004.1601197618.git.christophe.leroy@csgroup.eu>
Date: Sun, 27 Sep 2020 09:16:39 +0000 (UTC)
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>
Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v1 22/30] powerpc/vdso: Remove vdso_patches[] and associated
functions
vdso_patches[] is now empty, remove it and remove
all functions that depends on it.
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
arch/powerpc/kernel/vdso.c | 161 -------------------------------------
1 file changed, 161 deletions(-)
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index ec0f1aae0cad..5e4e3546f034 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -41,9 +41,6 @@
#define DBG(fmt...)
#endif
-/* Max supported size for symbol names */
-#define MAX_SYMNAME 64
-
/* The alignment of the vDSO */
#define VDSO_ALIGNMENT (1 << 16)
@@ -66,22 +63,6 @@ static union {
} vdso_data_store __page_aligned_data;
struct vdso_arch_data *vdso_data = &vdso_data_store.data;
-/* Format of the patch table */
-struct vdso_patch_def
-{
- unsigned long ftr_mask, ftr_value;
- const char *gen_name;
- const char *fix_name;
-};
-
-/* Table of functions to patch based on the CPU type/revision
- *
- * Currently, we only change sync_dicache to do nothing on processors
- * with a coherent icache
- */
-static struct vdso_patch_def vdso_patches[] = {
-};
-
/*
* Some infos carried around for each of them during parsing at
* boot time.
@@ -252,62 +233,6 @@ static void * __init find_section32(Elf32_Ehdr *ehdr, const char *secname,
*size = 0;
return NULL;
}
-
-static Elf32_Sym * __init find_symbol32(struct lib32_elfinfo *lib,
- const char *symname)
-{
- unsigned int i;
- char name[MAX_SYMNAME], *c;
-
- for (i = 0; i < (lib->dynsymsize / sizeof(Elf32_Sym)); i++) {
- if (lib->dynsym[i].st_name == 0)
- continue;
- strlcpy(name, lib->dynstr + lib->dynsym[i].st_name,
- MAX_SYMNAME);
- c = strchr(name, '@');
- if (c)
- *c = 0;
- if (strcmp(symname, name) == 0)
- return &lib->dynsym[i];
- }
- return NULL;
-}
-
-static int __init vdso_do_func_patch32(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64,
- const char *orig, const char *fix)
-{
- Elf32_Sym *sym32_gen, *sym32_fix;
-
- sym32_gen = find_symbol32(v32, orig);
- if (sym32_gen == NULL) {
- printk(KERN_ERR "vDSO32: Can't find symbol %s !\n", orig);
- return -1;
- }
- if (fix == NULL) {
- sym32_gen->st_name = 0;
- return 0;
- }
- sym32_fix = find_symbol32(v32, fix);
- if (sym32_fix == NULL) {
- printk(KERN_ERR "vDSO32: Can't find symbol %s !\n", fix);
- return -1;
- }
- sym32_gen->st_value = sym32_fix->st_value;
- sym32_gen->st_size = sym32_fix->st_size;
- sym32_gen->st_info = sym32_fix->st_info;
- sym32_gen->st_other = sym32_fix->st_other;
- sym32_gen->st_shndx = sym32_fix->st_shndx;
-
- return 0;
-}
-#else /* !CONFIG_VDSO32 */
-static int __init vdso_do_func_patch32(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64,
- const char *orig, const char *fix)
-{
- return 0;
-}
#endif /* CONFIG_VDSO32 */
@@ -336,56 +261,6 @@ static void * __init find_section64(Elf64_Ehdr *ehdr, const char *secname,
*size = 0;
return NULL;
}
-
-static Elf64_Sym * __init find_symbol64(struct lib64_elfinfo *lib,
- const char *symname)
-{
- unsigned int i;
- char name[MAX_SYMNAME], *c;
-
- for (i = 0; i < (lib->dynsymsize / sizeof(Elf64_Sym)); i++) {
- if (lib->dynsym[i].st_name == 0)
- continue;
- strlcpy(name, lib->dynstr + lib->dynsym[i].st_name,
- MAX_SYMNAME);
- c = strchr(name, '@');
- if (c)
- *c = 0;
- if (strcmp(symname, name) == 0)
- return &lib->dynsym[i];
- }
- return NULL;
-}
-
-static int __init vdso_do_func_patch64(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64,
- const char *orig, const char *fix)
-{
- Elf64_Sym *sym64_gen, *sym64_fix;
-
- sym64_gen = find_symbol64(v64, orig);
- if (sym64_gen == NULL) {
- printk(KERN_ERR "vDSO64: Can't find symbol %s !\n", orig);
- return -1;
- }
- if (fix == NULL) {
- sym64_gen->st_name = 0;
- return 0;
- }
- sym64_fix = find_symbol64(v64, fix);
- if (sym64_fix == NULL) {
- printk(KERN_ERR "vDSO64: Can't find symbol %s !\n", fix);
- return -1;
- }
- sym64_gen->st_value = sym64_fix->st_value;
- sym64_gen->st_size = sym64_fix->st_size;
- sym64_gen->st_info = sym64_fix->st_info;
- sym64_gen->st_other = sym64_fix->st_other;
- sym64_gen->st_shndx = sym64_fix->st_shndx;
-
- return 0;
-}
-
#endif /* CONFIG_PPC64 */
#define VDSO_DO_FIXUPS(type, value, bits, sec) do { \
@@ -459,39 +334,6 @@ static __init int vdso_fixup_features(struct lib32_elfinfo *v32,
return 0;
}
-static __init int vdso_fixup_alt_funcs(struct lib32_elfinfo *v32,
- struct lib64_elfinfo *v64)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(vdso_patches); i++) {
- struct vdso_patch_def *patch = &vdso_patches[i];
- int match = (cur_cpu_spec->cpu_features & patch->ftr_mask)
- == patch->ftr_value;
- if (!match)
- continue;
-
- DBG("replacing %s with %s...\n", patch->gen_name,
- patch->fix_name ? "NONE" : patch->fix_name);
-
- /*
- * Patch the 32 bits and 64 bits symbols. Note that we do not
- * patch the "." symbol on 64 bits.
- * It would be easy to do, but doesn't seem to be necessary,
- * patching the OPD symbol is enough.
- */
- vdso_do_func_patch32(v32, v64, patch->gen_name,
- patch->fix_name);
-#ifdef CONFIG_PPC64
- vdso_do_func_patch64(v32, v64, patch->gen_name,
- patch->fix_name);
-#endif /* CONFIG_PPC64 */
- }
-
- return 0;
-}
-
-
static __init int vdso_setup(void)
{
struct lib32_elfinfo v32;
@@ -505,9 +347,6 @@ static __init int vdso_setup(void)
if (vdso_fixup_features(&v32, &v64))
return -1;
- if (vdso_fixup_alt_funcs(&v32, &v64))
- return -1;
-
return 0;
}
--
2.25.0
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