[PATCH v1 21/30] powerpc/vdso: Remove runtime generated sigtramp offsets
From: Christophe Leroy <hidden>
Date: 2020-09-27 09:17:23
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Signal trampoline offsets are now generated at buildtime. Runtime generated offsets are not used anymore, remove them. Signed-off-by: Christophe Leroy <redacted> --- arch/powerpc/include/asm/vdso.h | 5 --- arch/powerpc/kernel/vdso.c | 59 --------------------------------- 2 files changed, 64 deletions(-)
diff --git a/arch/powerpc/include/asm/vdso.h b/arch/powerpc/include/asm/vdso.h
index f5257b7f17d0..a97384909fe5 100644
--- a/arch/powerpc/include/asm/vdso.h
+++ b/arch/powerpc/include/asm/vdso.h@@ -27,11 +27,6 @@ #define VDSO32_SYMBOL(base, name) ((unsigned long)(base) + (vdso32_offset_##name)) -/* Offsets relative to thread->vdso_base */ -extern unsigned long vdso64_rt_sigtramp; -extern unsigned long vdso32_sigtramp; -extern unsigned long vdso32_rt_sigtramp; - int vdso_getcpu_init(void); #else /* __ASSEMBLY__ */
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index 611977010e2d..ec0f1aae0cad 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c@@ -48,15 +48,10 @@ #define VDSO_ALIGNMENT (1 << 16) static void *vdso32_kbase; -unsigned long vdso32_sigtramp; -unsigned long vdso32_rt_sigtramp; extern char vdso32_start, vdso32_end; extern char vdso64_start, vdso64_end; static void *vdso64_kbase = &vdso64_start; -#ifdef CONFIG_PPC64 -unsigned long vdso64_rt_sigtramp; -#endif /* CONFIG_PPC64 */ static int vdso_ready;
@@ -278,22 +273,6 @@ static Elf32_Sym * __init find_symbol32(struct lib32_elfinfo *lib, return NULL; } -/* Note that we assume the section is .text and the symbol is relative to - * the library base - */ -static unsigned long __init find_function32(struct lib32_elfinfo *lib, - const char *symname) -{ - Elf32_Sym *sym = find_symbol32(lib, symname); - - if (sym == NULL) { - printk(KERN_WARNING "vDSO32: function %s not found !\n", - symname); - return 0; - } - return sym->st_value - VDSO32_LBASE; -} - static int __init vdso_do_func_patch32(struct lib32_elfinfo *v32, struct lib64_elfinfo *v64, const char *orig, const char *fix)
@@ -323,12 +302,6 @@ static int __init vdso_do_func_patch32(struct lib32_elfinfo *v32, return 0; } #else /* !CONFIG_VDSO32 */ -static unsigned long __init find_function32(struct lib32_elfinfo *lib, - const char *symname) -{ - return 0; -} - static int __init vdso_do_func_patch32(struct lib32_elfinfo *v32, struct lib64_elfinfo *v64, const char *orig, const char *fix)
@@ -384,22 +357,6 @@ static Elf64_Sym * __init find_symbol64(struct lib64_elfinfo *lib, return NULL; } -/* Note that we assume the section is .text and the symbol is relative to - * the library base - */ -static unsigned long __init find_function64(struct lib64_elfinfo *lib, - const char *symname) -{ - Elf64_Sym *sym = find_symbol64(lib, symname); - - if (sym == NULL) { - printk(KERN_WARNING "vDSO64: function %s not found !\n", - symname); - return 0; - } - return sym->st_value - VDSO64_LBASE; -} - static int __init vdso_do_func_patch64(struct lib32_elfinfo *v32, struct lib64_elfinfo *v64, const char *orig, const char *fix)
@@ -480,20 +437,6 @@ static __init int vdso_do_find_sections(struct lib32_elfinfo *v32, return 0; } -static __init void vdso_setup_trampolines(struct lib32_elfinfo *v32, - struct lib64_elfinfo *v64) -{ - /* - * Find signal trampolines - */ - -#ifdef CONFIG_PPC64 - vdso64_rt_sigtramp = find_function64(v64, "__kernel_sigtramp_rt64"); -#endif - vdso32_sigtramp = find_function32(v32, "__kernel_sigtramp32"); - vdso32_rt_sigtramp = find_function32(v32, "__kernel_sigtramp_rt32"); -} - static __init int vdso_fixup_features(struct lib32_elfinfo *v32, struct lib64_elfinfo *v64) {
@@ -565,8 +508,6 @@ static __init int vdso_setup(void) if (vdso_fixup_alt_funcs(&v32, &v64)) return -1; - vdso_setup_trampolines(&v32, &v64); - return 0; }
--
2.25.0