Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef __ASM_EXTABLE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define __ASM_EXTABLE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * The exception table consists of pairs of relative offsets: the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * is the relative offset to an instruction that is allowed to fault,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * and the second is the relative offset at which the program should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * continue. No registers are modified, so it is entirely up to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * continuation code to figure out what to do.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * All the routines below use bits of fixup code that are out of line
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  * with the main instruction path.  This means when everything is well,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * we don't even have to jump over them.  Further, they do not intrude
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * on our cache or tlb entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct exception_table_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	int insn, fixup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define ARCH_HAS_RELATIVE_EXTABLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static inline bool in_bpf_jit(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	if (!IS_ENABLED(CONFIG_BPF_JIT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	return regs->pc >= BPF_JIT_REGION_START &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	       regs->pc < BPF_JIT_REGION_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #ifdef CONFIG_BPF_JIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int arm64_bpf_fixup_exception(const struct exception_table_entry *ex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 			      struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #else /* !CONFIG_BPF_JIT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int arm64_bpf_fixup_exception(const struct exception_table_entry *ex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 			      struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #endif /* !CONFIG_BPF_JIT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) extern int fixup_exception(struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #endif