linux-stable/lib/ubsan.h
Nathan Chancellor 28abcc9631 ubsan: implement __ubsan_handle_alignment_assumption
When building ARCH=mips 32r2el_defconfig with CONFIG_UBSAN_ALIGNMENT:

  ld.lld: error: undefined symbol: __ubsan_handle_alignment_assumption
     referenced by slab.h:557 (include/linux/slab.h:557)
                   main.o:(do_initcalls) in archive init/built-in.a
     referenced by slab.h:448 (include/linux/slab.h:448)
                   do_mounts_rd.o:(rd_load_image) in archive init/built-in.a
     referenced by slab.h:448 (include/linux/slab.h:448)
                   do_mounts_rd.o:(identify_ramdisk_image) in archive init/built-in.a
     referenced 1579 more times

Implement this for the kernel based on LLVM's
handleAlignmentAssumptionImpl because the kernel is not linked against
the compiler runtime.

Link: https://github.com/ClangBuiltLinux/linux/issues/1245
Link: https://github.com/llvm/llvm-project/blob/llvmorg-11.0.1/compiler-rt/lib/ubsan/ubsan_handlers.cpp#L151-L190
Link: https://lkml.kernel.org/r/20210127224451.2587372-1-nathan@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-05 11:03:47 -08:00

95 lines
1.8 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIB_UBSAN_H
#define _LIB_UBSAN_H
enum {
type_kind_int = 0,
type_kind_float = 1,
type_unknown = 0xffff
};
struct type_descriptor {
u16 type_kind;
u16 type_info;
char type_name[1];
};
struct source_location {
const char *file_name;
union {
unsigned long reported;
struct {
u32 line;
u32 column;
};
};
};
struct overflow_data {
struct source_location location;
struct type_descriptor *type;
};
struct type_mismatch_data {
struct source_location location;
struct type_descriptor *type;
unsigned long alignment;
unsigned char type_check_kind;
};
struct type_mismatch_data_v1 {
struct source_location location;
struct type_descriptor *type;
unsigned char log_alignment;
unsigned char type_check_kind;
};
struct type_mismatch_data_common {
struct source_location *location;
struct type_descriptor *type;
unsigned long alignment;
unsigned char type_check_kind;
};
struct nonnull_arg_data {
struct source_location location;
struct source_location attr_location;
int arg_index;
};
struct out_of_bounds_data {
struct source_location location;
struct type_descriptor *array_type;
struct type_descriptor *index_type;
};
struct shift_out_of_bounds_data {
struct source_location location;
struct type_descriptor *lhs_type;
struct type_descriptor *rhs_type;
};
struct unreachable_data {
struct source_location location;
};
struct invalid_value_data {
struct source_location location;
struct type_descriptor *type;
};
struct alignment_assumption_data {
struct source_location location;
struct source_location assumption_location;
struct type_descriptor *type;
};
#if defined(CONFIG_ARCH_SUPPORTS_INT128)
typedef __int128 s_max;
typedef unsigned __int128 u_max;
#else
typedef s64 s_max;
typedef u64 u_max;
#endif
#endif