diff options
Diffstat (limited to 'arch/x86/um/vdso')
| -rw-r--r-- | arch/x86/um/vdso/Makefile | 12 | ||||
| -rw-r--r-- | arch/x86/um/vdso/checkundef.sh | 11 | ||||
| -rw-r--r-- | arch/x86/um/vdso/um_vdso.c | 10 | ||||
| -rw-r--r-- | arch/x86/um/vdso/vma.c | 12 |
4 files changed, 18 insertions, 27 deletions
diff --git a/arch/x86/um/vdso/Makefile b/arch/x86/um/vdso/Makefile index b86d634730b2..7478d11dacb7 100644 --- a/arch/x86/um/vdso/Makefile +++ b/arch/x86/um/vdso/Makefile @@ -3,12 +3,6 @@ # Building vDSO images for x86. # -# do not instrument on vdso because KASAN is not compatible with user mode -KASAN_SANITIZE := n - -# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. -KCOV_INSTRUMENT := n - VDSO64-y := y vdso-install-$(VDSO64-y) += vdso.so @@ -62,8 +56,6 @@ CFLAGS_REMOVE_um_vdso.o = -pg -fprofile-arcs -ftest-coverage quiet_cmd_vdso = VDSO $@ cmd_vdso = $(CC) -nostdlib -o $@ \ $(CC_FLAGS_LTO) $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \ - -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \ - sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@' + -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) -VDSO_LDFLAGS = -fPIC -shared -Wl,--hash-style=sysv -z noexecstack -GCOV_PROFILE := n +VDSO_LDFLAGS = -fPIC -shared -Wl,--hash-style=sysv -z noexecstack -Wl,--no-undefined diff --git a/arch/x86/um/vdso/checkundef.sh b/arch/x86/um/vdso/checkundef.sh deleted file mode 100644 index 8e3ea6bb956f..000000000000 --- a/arch/x86/um/vdso/checkundef.sh +++ /dev/null @@ -1,11 +0,0 @@ -#!/bin/sh -# SPDX-License-Identifier: GPL-2.0 -nm="$1" -file="$2" -$nm "$file" | grep '^ *U' > /dev/null 2>&1 -if [ $? -eq 1 ]; then - exit 0 -else - echo "$file: undefined symbols found" >&2 - exit 1 -fi diff --git a/arch/x86/um/vdso/um_vdso.c b/arch/x86/um/vdso/um_vdso.c index ff0f3b4b6c45..cbae2584124f 100644 --- a/arch/x86/um/vdso/um_vdso.c +++ b/arch/x86/um/vdso/um_vdso.c @@ -13,6 +13,12 @@ #include <linux/getcpu.h> #include <asm/unistd.h> +/* workaround for -Wmissing-prototypes warnings */ +int __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts); +int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz); +__kernel_old_time_t __vdso_time(__kernel_old_time_t *t); +long __vdso_getcpu(unsigned int *cpu, unsigned int *node, struct getcpu_cache *unused); + int __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts) { long ret; @@ -54,7 +60,7 @@ __kernel_old_time_t __vdso_time(__kernel_old_time_t *t) __kernel_old_time_t time(__kernel_old_time_t *t) __attribute__((weak, alias("__vdso_time"))); long -__vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused) +__vdso_getcpu(unsigned int *cpu, unsigned int *node, struct getcpu_cache *unused) { /* * UML does not support SMP, we can cheat here. :) @@ -68,5 +74,5 @@ __vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused) return 0; } -long getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache) +long getcpu(unsigned int *cpu, unsigned int *node, struct getcpu_cache *tcache) __attribute__((weak, alias("__vdso_getcpu"))); diff --git a/arch/x86/um/vdso/vma.c b/arch/x86/um/vdso/vma.c index 76d9f6ce7a3d..f238f7b33cdd 100644 --- a/arch/x86/um/vdso/vma.c +++ b/arch/x86/um/vdso/vma.c @@ -52,8 +52,11 @@ subsys_initcall(init_vdso); int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) { - int err; + struct vm_area_struct *vma; struct mm_struct *mm = current->mm; + static struct vm_special_mapping vdso_mapping = { + .name = "[vdso]", + }; if (!vdso_enabled) return 0; @@ -61,12 +64,13 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) if (mmap_write_lock_killable(mm)) return -EINTR; - err = install_special_mapping(mm, um_vdso_addr, PAGE_SIZE, + vdso_mapping.pages = vdsop; + vma = _install_special_mapping(mm, um_vdso_addr, PAGE_SIZE, VM_READ|VM_EXEC| VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, - vdsop); + &vdso_mapping); mmap_write_unlock(mm); - return err; + return IS_ERR(vma) ? PTR_ERR(vma) : 0; } |