| 1 |
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| 2 | #ifndef __S390_EXTABLE_H
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| 3 | #define __S390_EXTABLE_H
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| 4 |
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| 5 | #include <asm/ptrace.h>
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| 6 | #include <linux/compiler.h>
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| 7 |
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| 8 | |
| 9 | * struct exception_table_entry - entry in exception table
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| 10 | * @insn: Relative pointer to faulting instruction
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| 11 | * @fixup: Relative pointer to instruction where execution resumes
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| 12 | * @type: Exception type
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| 13 | * @data: handler-specific data
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| 14 |
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| 15 | struct exception_table_entry {
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| 16 | int insn, fixup;
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| 17 | short type, data;
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| 18 | };
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| 19 |
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| 20 | extern struct exception_table_entry *__start_amode31_ex_table;
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| 21 | extern struct exception_table_entry *__stop_amode31_ex_table;
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| 22 |
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| 23 | const struct exception_table_entry *s390_search_extables(unsigned long addr);
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| 24 |
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| 25 | static inline unsigned long extable_fixup(const struct exception_table_entry *x)
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| 26 | {
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| 27 | return (unsigned long)&x->fixup + x->fixup;
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| 28 | }
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| 29 |
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| 30 | #define ARCH_HAS_RELATIVE_EXTABLE
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| 31 |
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| 32 | static inline void swap_ex_entry_fixup(struct exception_table_entry *a,
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| 33 | struct exception_table_entry *b,
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| 34 | struct exception_table_entry tmp,
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| 35 | int delta)
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| 36 | {
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| 37 | a->fixup = b->fixup + delta;
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| 38 | b->fixup = tmp.fixup - delta;
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| 39 | a->type = b->type;
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| 40 | b->type = tmp.type;
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| 41 | a->data = b->data;
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| 42 | b->data = tmp.data;
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| 43 | }
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| 44 | #define swap_ex_entry_fixup swap_ex_entry_fixup
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| 45 |
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| 46 | #ifdef CONFIG_BPF_JIT
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| 47 |
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| 48 | bool ex_handler_bpf(const struct exception_table_entry *ex, struct pt_regs *regs);
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| 49 |
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| 50 | #else
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| 51 |
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| 52 | static inline bool ex_handler_bpf(const struct exception_table_entry *ex, struct pt_regs *regs)
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| 53 | {
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| 54 | return false;
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| 55 | }
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| 56 |
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| 57 | #endif
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| 58 |
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| 59 | bool fixup_exception(struct pt_regs *regs);
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| 60 |
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| 61 | #endif
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