diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-24 06:42:00 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-24 06:42:00 +0100 |
| commit | a97a2d4d56ea596871b739d63d41b084733bd9fb (patch) | |
| tree | e28c9143d5bd4da978caccd137bd193297d5e13e /arch/sparc/vdso/vdso2c.h | |
| parent | 44786880df196a4200c178945c4d41675faf9fb7 (diff) | |
| parent | 8dbc450f76dc8f3b47fe117cd0cde166e1f21b64 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc updates from David Miller:
"Mostly VDSO cleanups and optimizations"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc: Several small VDSO vclock_gettime.c improvements.
sparc: Validate VDSO for undefined symbols.
sparc: Really use linker with LDFLAGS.
sparc: Improve VDSO CFLAGS.
sparc: Set DISABLE_BRANCH_PROFILING in VDSO CFLAGS.
sparc: Don't bother masking out TICK_PRIV_BIT in VDSO code.
sparc: Inline VDSO gettime code aggressively.
sparc: Improve VDSO instruction patching.
sparc: Fix parport build warnings.
Diffstat (limited to 'arch/sparc/vdso/vdso2c.h')
| -rw-r--r-- | arch/sparc/vdso/vdso2c.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/sparc/vdso/vdso2c.h b/arch/sparc/vdso/vdso2c.h index 808decb0f7be..4df005cf98c0 100644 --- a/arch/sparc/vdso/vdso2c.h +++ b/arch/sparc/vdso/vdso2c.h @@ -17,10 +17,11 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len, unsigned long mapping_size; int i; unsigned long j; - - ELF(Shdr) *symtab_hdr = NULL, *strtab_hdr; + ELF(Shdr) *symtab_hdr = NULL, *strtab_hdr, *secstrings_hdr, + *patch_sec = NULL; ELF(Ehdr) *hdr = (ELF(Ehdr) *)raw_addr; ELF(Dyn) *dyn = 0, *dyn_end = 0; + const char *secstrings; INT_BITS syms[NSYMS] = {}; ELF(Phdr) *pt = (ELF(Phdr) *)(raw_addr + GET_BE(&hdr->e_phoff)); @@ -63,11 +64,18 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len, } /* Walk the section table */ + secstrings_hdr = raw_addr + GET_BE(&hdr->e_shoff) + + GET_BE(&hdr->e_shentsize)*GET_BE(&hdr->e_shstrndx); + secstrings = raw_addr + GET_BE(&secstrings_hdr->sh_offset); for (i = 0; i < GET_BE(&hdr->e_shnum); i++) { ELF(Shdr) *sh = raw_addr + GET_BE(&hdr->e_shoff) + GET_BE(&hdr->e_shentsize) * i; if (GET_BE(&sh->sh_type) == SHT_SYMTAB) symtab_hdr = sh; + + if (!strcmp(secstrings + GET_BE(&sh->sh_name), + ".tick_patch")) + patch_sec = sh; } if (!symtab_hdr) @@ -134,6 +142,12 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len, fprintf(outfile, "const struct vdso_image %s_builtin = {\n", name); fprintf(outfile, "\t.data = raw_data,\n"); fprintf(outfile, "\t.size = %lu,\n", mapping_size); + if (patch_sec) { + fprintf(outfile, "\t.tick_patch = %lu,\n", + (unsigned long)GET_BE(&patch_sec->sh_offset)); + fprintf(outfile, "\t.tick_patch_len = %lu,\n", + (unsigned long)GET_BE(&patch_sec->sh_size)); + } for (i = 0; i < NSYMS; i++) { if (required_syms[i].export && syms[i]) fprintf(outfile, "\t.sym_%s = %" PRIi64 ",\n", |