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| author | Eduard Zingerman <eddyz87@gmail.com> | 2026-09-04 17:05:56 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 18:17:30 -0700 |
| commit | 506ada89629ec7059b96ecfb0dc7d33ece0103ca (patch) | |
| tree | 0b07297409b68d2333fb4f0eae7f3b072eb68d4c /tools/perf/util/genelf.h | |
| download | linux-stable-506ada89629ec7059b96ecfb0dc7d33ece0103ca.tar.gz linux-stable-506ada89629ec7059b96ecfb0dc7d33ece0103ca.zip | |
bpf: mark a NULL kfunc argument precisegrafted
check_kfunc_arg() allows bpf_register_is_null() for nullable arguments
w/o marking the underlying scalar register precise. Hence a checkpoint
created on such a path would prune against arbitrary scalar value.
Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)")
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/perf/util/genelf.h')
| -rw-r--r-- | tools/perf/util/genelf.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/tools/perf/util/genelf.h b/tools/perf/util/genelf.h new file mode 100644 index 000000000..9f0b875d6 --- /dev/null +++ b/tools/perf/util/genelf.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __GENELF_H__ +#define __GENELF_H__ + +#include <linux/math.h> + +/* genelf.c */ +int jit_write_elf(int fd, uint64_t code_addr, const char *sym, + const void *code, int csize, void *debug, int nr_debug_entries, + void *unwinding, uint64_t unwinding_header_size, uint64_t unwinding_size); +#ifdef HAVE_LIBDW_SUPPORT +/* genelf_debug.c */ +int jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries); +#endif + +#if defined(__arm__) +#define GEN_ELF_ARCH EM_ARM +#define GEN_ELF_CLASS ELFCLASS32 +#elif defined(__aarch64__) +#define GEN_ELF_ARCH EM_AARCH64 +#define GEN_ELF_CLASS ELFCLASS64 +#elif defined(__x86_64__) +#define GEN_ELF_ARCH EM_X86_64 +#define GEN_ELF_CLASS ELFCLASS64 +#elif defined(__i386__) +#define GEN_ELF_ARCH EM_386 +#define GEN_ELF_CLASS ELFCLASS32 +#elif defined(__powerpc64__) +#define GEN_ELF_ARCH EM_PPC64 +#define GEN_ELF_CLASS ELFCLASS64 +#elif defined(__powerpc__) +#define GEN_ELF_ARCH EM_PPC +#define GEN_ELF_CLASS ELFCLASS32 +#elif defined(__sparc__) && defined(__arch64__) +#define GEN_ELF_ARCH EM_SPARCV9 +#define GEN_ELF_CLASS ELFCLASS64 +#elif defined(__sparc__) +#define GEN_ELF_ARCH EM_SPARC +#define GEN_ELF_CLASS ELFCLASS32 +#elif defined(__s390x__) +#define GEN_ELF_ARCH EM_S390 +#define GEN_ELF_CLASS ELFCLASS64 +#elif defined(__riscv) && __riscv_xlen == 64 +#define GEN_ELF_ARCH EM_RISCV +#define GEN_ELF_CLASS ELFCLASS64 +#elif defined(__riscv) && __riscv_xlen == 32 +#define GEN_ELF_ARCH EM_RISCV +#define GEN_ELF_CLASS ELFCLASS32 +#elif defined(__loongarch__) +#define GEN_ELF_ARCH EM_LOONGARCH +#define GEN_ELF_CLASS ELFCLASS64 +#else +#error "unsupported architecture" +#endif + +#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ +#define GEN_ELF_ENDIAN ELFDATA2MSB +#else +#define GEN_ELF_ENDIAN ELFDATA2LSB +#endif + +#if GEN_ELF_CLASS == ELFCLASS64 +#define elf_newehdr elf64_newehdr +#define elf_newphdr elf64_newphdr +#define elf_getshdr elf64_getshdr +#define Elf_Ehdr Elf64_Ehdr +#define Elf_Phdr Elf64_Phdr +#define Elf_Shdr Elf64_Shdr +#define Elf_Sym Elf64_Sym +#define ELF_ST_TYPE(a) ELF64_ST_TYPE(a) +#define ELF_ST_BIND(a) ELF64_ST_BIND(a) +#define ELF_ST_VIS(a) ELF64_ST_VISIBILITY(a) +#else +#define elf_newehdr elf32_newehdr +#define elf_newphdr elf32_newphdr +#define elf_getshdr elf32_getshdr +#define Elf_Ehdr Elf32_Ehdr +#define Elf_Phdr Elf32_Phdr +#define Elf_Shdr Elf32_Shdr +#define Elf_Sym Elf32_Sym +#define ELF_ST_TYPE(a) ELF32_ST_TYPE(a) +#define ELF_ST_BIND(a) ELF32_ST_BIND(a) +#define ELF_ST_VIS(a) ELF32_ST_VISIBILITY(a) +#endif + +/* The .text section is directly after the ELF header */ +#define GEN_ELF_TEXT_OFFSET round_up(sizeof(Elf_Ehdr) + sizeof(Elf_Phdr), 16) + +#endif |