linux/lib/ubsan.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIB_UBSAN_H
#define _LIB_UBSAN_H

/*
 * ABI defined by Clang's UBSAN enum SanitizerHandler:
 * https://github.com/llvm/llvm-project/blob/release/16.x/clang/lib/CodeGen/CodeGenFunction.h#L113
 */
enum ubsan_checks { … };

enum { … };

struct type_descriptor { … };

struct source_location { … };

struct overflow_data { … };

struct type_mismatch_data { … };

struct type_mismatch_data_v1 { … };

struct type_mismatch_data_common { … };

struct nonnull_arg_data { … };

struct out_of_bounds_data { … };

struct shift_out_of_bounds_data { … };

struct unreachable_data { … };

struct invalid_value_data { … };

struct alignment_assumption_data { … };

#if defined(CONFIG_ARCH_SUPPORTS_INT128)
s_max;
u_max;
#else
typedef s64 s_max;
typedef u64 u_max;
#endif

/*
 * When generating Runtime Calls, Clang doesn't respect the -mregparm=3
 * option used on i386: https://github.com/llvm/llvm-project/issues/89670
 * Fix this for earlier Clang versions by forcing the calling convention
 * to use non-register arguments.
 */
#if defined(CONFIG_X86_32) && \
    defined(CONFIG_CC_IS_CLANG) && CONFIG_CLANG_VERSION < 190000
#define ubsan_linkage …
#else
#define ubsan_linkage
#endif

void ubsan_linkage __ubsan_handle_add_overflow(void *data, void *lhs, void *rhs);
void ubsan_linkage __ubsan_handle_sub_overflow(void *data, void *lhs, void *rhs);
void ubsan_linkage __ubsan_handle_mul_overflow(void *data, void *lhs, void *rhs);
void ubsan_linkage __ubsan_handle_negate_overflow(void *_data, void *old_val);
void ubsan_linkage __ubsan_handle_divrem_overflow(void *_data, void *lhs, void *rhs);
void ubsan_linkage __ubsan_handle_type_mismatch(struct type_mismatch_data *data, void *ptr);
void ubsan_linkage __ubsan_handle_type_mismatch_v1(void *_data, void *ptr);
void ubsan_linkage __ubsan_handle_out_of_bounds(void *_data, void *index);
void ubsan_linkage __ubsan_handle_shift_out_of_bounds(void *_data, void *lhs, void *rhs);
void ubsan_linkage __ubsan_handle_builtin_unreachable(void *_data);
void ubsan_linkage __ubsan_handle_load_invalid_value(void *_data, void *val);
void ubsan_linkage __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,
						       unsigned long align,
						       unsigned long offset);

#endif