diff options
Diffstat (limited to 'arch/x86/entry/vdso')
| -rw-r--r-- | arch/x86/entry/vdso/Makefile | 15 | ||||
| -rw-r--r-- | arch/x86/entry/vdso/vdso2c.c | 4 | ||||
| -rw-r--r-- | arch/x86/entry/vdso/vdso2c.h | 16 | ||||
| -rw-r--r-- | arch/x86/entry/vdso/vma.c | 14 |
4 files changed, 21 insertions, 28 deletions
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile index 433a1259f61d..54e03ab26ff3 100644 --- a/arch/x86/entry/vdso/Makefile +++ b/arch/x86/entry/vdso/Makefile @@ -24,6 +24,8 @@ VDSO32-$(CONFIG_IA32_EMULATION) := y # files to link into the vdso vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o +vobjs32-y := vdso32/note.o vdso32/system_call.o vdso32/sigreturn.o +vobjs32-y += vdso32/vclock_gettime.o # files to link into kernel obj-y += vma.o @@ -37,10 +39,12 @@ vdso_img-$(VDSO32-y) += 32 obj-$(VDSO32-y) += vdso32-setup.o vobjs := $(foreach F,$(vobjs-y),$(obj)/$F) +vobjs32 := $(foreach F,$(vobjs32-y),$(obj)/$F) $(obj)/vdso.o: $(obj)/vdso.so targets += vdso.lds $(vobjs-y) +targets += vdso32/vdso32.lds $(vobjs32-y) # Build the vDSO image C files and link them in. vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o) @@ -130,10 +134,6 @@ $(obj)/vdsox32.so.dbg: $(obj)/vdsox32.lds $(vobjx32s) FORCE CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds) VDSO_LDFLAGS_vdso32.lds = -m elf_i386 -soname linux-gate.so.1 -targets += vdso32/vdso32.lds -targets += vdso32/note.o vdso32/system_call.o vdso32/sigreturn.o -targets += vdso32/vclock_gettime.o - KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) $(obj)/vdso32.so.dbg: asflags-$(CONFIG_X86_64) += -m32 @@ -158,12 +158,7 @@ endif $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) -$(obj)/vdso32.so.dbg: FORCE \ - $(obj)/vdso32/vdso32.lds \ - $(obj)/vdso32/vclock_gettime.o \ - $(obj)/vdso32/note.o \ - $(obj)/vdso32/system_call.o \ - $(obj)/vdso32/sigreturn.o +$(obj)/vdso32.so.dbg: $(obj)/vdso32/vdso32.lds $(vobjs32) FORCE $(call if_changed,vdso_and_check) # diff --git a/arch/x86/entry/vdso/vdso2c.c b/arch/x86/entry/vdso/vdso2c.c index 3842873b3ae3..7380908045c7 100644 --- a/arch/x86/entry/vdso/vdso2c.c +++ b/arch/x86/entry/vdso/vdso2c.c @@ -187,7 +187,7 @@ static void map_input(const char *name, void **addr, size_t *len, int prot) int fd = open(name, O_RDONLY); if (fd == -1) - err(1, "%s", name); + err(1, "open(%s)", name); tmp_len = lseek(fd, 0, SEEK_END); if (tmp_len == (off_t)-1) @@ -240,7 +240,7 @@ int main(int argc, char **argv) outfilename = argv[3]; outfile = fopen(outfilename, "w"); if (!outfile) - err(1, "%s", argv[2]); + err(1, "fopen(%s)", outfilename); go(raw_addr, raw_len, stripped_addr, stripped_len, outfile, name); diff --git a/arch/x86/entry/vdso/vdso2c.h b/arch/x86/entry/vdso/vdso2c.h index a20b134de2a8..6f46e11ce539 100644 --- a/arch/x86/entry/vdso/vdso2c.h +++ b/arch/x86/entry/vdso/vdso2c.h @@ -13,8 +13,7 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len, unsigned long load_size = -1; /* Work around bogus warning */ unsigned long mapping_size; ELF(Ehdr) *hdr = (ELF(Ehdr) *)raw_addr; - int i; - unsigned long j; + unsigned long i, syms_nr; ELF(Shdr) *symtab_hdr = NULL, *strtab_hdr, *secstrings_hdr, *alt_sec = NULL; ELF(Dyn) *dyn = 0, *dyn_end = 0; @@ -86,11 +85,10 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len, strtab_hdr = raw_addr + GET_LE(&hdr->e_shoff) + GET_LE(&hdr->e_shentsize) * GET_LE(&symtab_hdr->sh_link); + syms_nr = GET_LE(&symtab_hdr->sh_size) / GET_LE(&symtab_hdr->sh_entsize); /* Walk the symbol table */ - for (i = 0; - i < GET_LE(&symtab_hdr->sh_size) / GET_LE(&symtab_hdr->sh_entsize); - i++) { - int k; + for (i = 0; i < syms_nr; i++) { + unsigned int k; ELF(Sym) *sym = raw_addr + GET_LE(&symtab_hdr->sh_offset) + GET_LE(&symtab_hdr->sh_entsize) * i; const char *sym_name = raw_addr + @@ -150,11 +148,11 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len, fprintf(outfile, "static unsigned char raw_data[%lu] __ro_after_init __aligned(PAGE_SIZE) = {", mapping_size); - for (j = 0; j < stripped_len; j++) { - if (j % 10 == 0) + for (i = 0; i < stripped_len; i++) { + if (i % 10 == 0) fprintf(outfile, "\n\t"); fprintf(outfile, "0x%02X, ", - (int)((unsigned char *)stripped_addr)[j]); + (int)((unsigned char *)stripped_addr)[i]); } fprintf(outfile, "\n};\n\n"); diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c index 43428cc514c8..ea7c1f0b79df 100644 --- a/arch/x86/entry/vdso/vma.c +++ b/arch/x86/entry/vdso/vma.c @@ -144,7 +144,7 @@ int vdso_join_timens(struct task_struct *task, struct time_namespace *ns) struct mm_struct *mm = task->mm; struct vm_area_struct *vma; - if (down_write_killable(&mm->mmap_sem)) + if (mmap_write_lock_killable(mm)) return -EINTR; for (vma = mm->mmap; vma; vma = vma->vm_next) { @@ -154,7 +154,7 @@ int vdso_join_timens(struct task_struct *task, struct time_namespace *ns) zap_page_range(vma, vma->vm_start, size); } - up_write(&mm->mmap_sem); + mmap_write_unlock(mm); return 0; } #else @@ -268,7 +268,7 @@ static int map_vdso(const struct vdso_image *image, unsigned long addr) unsigned long text_start; int ret = 0; - if (down_write_killable(&mm->mmap_sem)) + if (mmap_write_lock_killable(mm)) return -EINTR; addr = get_unmapped_area(NULL, addr, @@ -311,7 +311,7 @@ static int map_vdso(const struct vdso_image *image, unsigned long addr) } up_fail: - up_write(&mm->mmap_sem); + mmap_write_unlock(mm); return ret; } @@ -373,7 +373,7 @@ int map_vdso_once(const struct vdso_image *image, unsigned long addr) struct mm_struct *mm = current->mm; struct vm_area_struct *vma; - down_write(&mm->mmap_sem); + mmap_write_lock(mm); /* * Check if we have already mapped vdso blob - fail to prevent * abusing from userspace install_speciall_mapping, which may @@ -384,11 +384,11 @@ int map_vdso_once(const struct vdso_image *image, unsigned long addr) for (vma = mm->mmap; vma; vma = vma->vm_next) { if (vma_is_special_mapping(vma, &vdso_mapping) || vma_is_special_mapping(vma, &vvar_mapping)) { - up_write(&mm->mmap_sem); + mmap_write_unlock(mm); return -EEXIST; } } - up_write(&mm->mmap_sem); + mmap_write_unlock(mm); return map_vdso(image, addr); } |