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- /* SPDX-License-Identifier: GPL-2.0 */
- #include <linux/stringify.h>
- #include <linux/linkage.h>
- #include <asm/dwarf2.h>
- #include <asm/cpufeatures.h>
- #include <asm/alternative-asm.h>
- #include <asm-generic/export.h>
- #include <asm/nospec-branch.h>
- .macro THUNK reg
- .section .text.__x86.indirect_thunk
- ENTRY(__x86_indirect_thunk_\reg)
- CFI_STARTPROC
- JMP_NOSPEC %\reg
- CFI_ENDPROC
- ENDPROC(__x86_indirect_thunk_\reg)
- .endm
- /*
- * Despite being an assembler file we can't just use .irp here
- * because __KSYM_DEPS__ only uses the C preprocessor and would
- * only see one instance of "__x86_indirect_thunk_\reg" rather
- * than one per register with the correct names. So we do it
- * the simple and nasty way...
- */
- #define __EXPORT_THUNK(sym) _ASM_NOKPROBE(sym); EXPORT_SYMBOL(sym)
- #define EXPORT_THUNK(reg) __EXPORT_THUNK(__x86_indirect_thunk_ ## reg)
- #define GENERATE_THUNK(reg) THUNK reg ; EXPORT_THUNK(reg)
- GENERATE_THUNK(_ASM_AX)
- GENERATE_THUNK(_ASM_BX)
- GENERATE_THUNK(_ASM_CX)
- GENERATE_THUNK(_ASM_DX)
- GENERATE_THUNK(_ASM_SI)
- GENERATE_THUNK(_ASM_DI)
- GENERATE_THUNK(_ASM_BP)
- #ifdef CONFIG_64BIT
- GENERATE_THUNK(r8)
- GENERATE_THUNK(r9)
- GENERATE_THUNK(r10)
- GENERATE_THUNK(r11)
- GENERATE_THUNK(r12)
- GENERATE_THUNK(r13)
- GENERATE_THUNK(r14)
- GENERATE_THUNK(r15)
- #endif
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