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65 lines
1.7 KiB
65 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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#ifndef __ASM_ASM_EXTABLE_H |
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#define __ASM_ASM_EXTABLE_H |
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#define EX_TYPE_NONE 0 |
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#define EX_TYPE_FIXUP 1 |
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#define EX_TYPE_BPF 2 |
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#define EX_TYPE_UACCESS_ERR_ZERO 3 |
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#ifdef __ASSEMBLY__ |
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#define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ |
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.pushsection __ex_table, "a"; \ |
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.balign 4; \ |
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.long ((insn) - .); \ |
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.long ((fixup) - .); \ |
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.short (type); \ |
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.short (data); \ |
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.popsection; |
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.macro _asm_extable, insn, fixup |
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__ASM_EXTABLE_RAW(\insn, \fixup, EX_TYPE_FIXUP, 0) |
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.endm |
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#else /* __ASSEMBLY__ */ |
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#include <linux/bits.h> |
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#include <linux/stringify.h> |
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#include <asm/gpr-num.h> |
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#define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ |
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".pushsection __ex_table, \"a\"\n" \ |
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".balign 4\n" \ |
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".long ((" insn ") - .)\n" \ |
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".long ((" fixup ") - .)\n" \ |
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".short (" type ")\n" \ |
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".short (" data ")\n" \ |
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".popsection\n" |
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#define _ASM_EXTABLE(insn, fixup) \ |
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__ASM_EXTABLE_RAW(#insn, #fixup, __stringify(EX_TYPE_FIXUP), "0") |
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#define EX_DATA_REG_ERR_SHIFT 0 |
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#define EX_DATA_REG_ERR GENMASK(4, 0) |
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#define EX_DATA_REG_ZERO_SHIFT 5 |
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#define EX_DATA_REG_ZERO GENMASK(9, 5) |
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#define EX_DATA_REG(reg, gpr) \ |
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"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")" |
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#define _ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero) \ |
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__DEFINE_ASM_GPR_NUMS \ |
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__ASM_EXTABLE_RAW(#insn, #fixup, \ |
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__stringify(EX_TYPE_UACCESS_ERR_ZERO), \ |
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"(" \ |
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EX_DATA_REG(ERR, err) " | " \ |
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EX_DATA_REG(ZERO, zero) \ |
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")") |
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#define _ASM_EXTABLE_UACCESS_ERR(insn, fixup, err) \ |
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_ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero) |
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#endif /* __ASSEMBLY__ */ |
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#endif /* __ASM_ASM_EXTABLE_H */
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