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- #ifndef _ASM_X86_LINKAGE_H
- #define _ASM_X86_LINKAGE_H
- #undef notrace
- #define notrace __attribute__((no_instrument_function))
- #ifdef CONFIG_X86_64
- #define __ALIGN .p2align 4,,15
- #define __ALIGN_STR ".p2align 4,,15"
- #endif
- #ifdef CONFIG_X86_32
- #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
- /*
- * For 32-bit UML - mark functions implemented in assembly that use
- * regparm input parameters:
- */
- #define asmregparm __attribute__((regparm(3)))
- /*
- * Make sure the compiler doesn't do anything stupid with the
- * arguments on the stack - they are owned by the *caller*, not
- * the callee. This just fools gcc into not spilling into them,
- * and keeps it from doing tailcall recursion and/or using the
- * stack slots for temporaries, since they are live and "used"
- * all the way to the end of the function.
- *
- * NOTE! On x86-64, all the arguments are in registers, so this
- * only matters on a 32-bit kernel.
- */
- #define asmlinkage_protect(n, ret, args...) \
- __asmlinkage_protect##n(ret, ##args)
- #define __asmlinkage_protect_n(ret, args...) \
- __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args)
- #define __asmlinkage_protect0(ret) \
- __asmlinkage_protect_n(ret)
- #define __asmlinkage_protect1(ret, arg1) \
- __asmlinkage_protect_n(ret, "g" (arg1))
- #define __asmlinkage_protect2(ret, arg1, arg2) \
- __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2))
- #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \
- __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3))
- #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \
- __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
- "g" (arg4))
- #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \
- __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
- "g" (arg4), "g" (arg5))
- #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \
- __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
- "g" (arg4), "g" (arg5), "g" (arg6))
- #endif
- #ifdef CONFIG_X86_ALIGNMENT_16
- #define __ALIGN .align 16,0x90
- #define __ALIGN_STR ".align 16,0x90"
- #endif
- /*
- * to check ENTRY_X86/END_X86 and
- * KPROBE_ENTRY_X86/KPROBE_END_X86
- * unbalanced-missed-mixed appearance
- */
- #define __set_entry_x86 .set ENTRY_X86_IN, 0
- #define __unset_entry_x86 .set ENTRY_X86_IN, 1
- #define __set_kprobe_x86 .set KPROBE_X86_IN, 0
- #define __unset_kprobe_x86 .set KPROBE_X86_IN, 1
- #define __macro_err_x86 .error "ENTRY_X86/KPROBE_X86 unbalanced,missed,mixed"
- #define __check_entry_x86 \
- .ifdef ENTRY_X86_IN; \
- .ifeq ENTRY_X86_IN; \
- __macro_err_x86; \
- .abort; \
- .endif; \
- .endif
- #define __check_kprobe_x86 \
- .ifdef KPROBE_X86_IN; \
- .ifeq KPROBE_X86_IN; \
- __macro_err_x86; \
- .abort; \
- .endif; \
- .endif
- #define __check_entry_kprobe_x86 \
- __check_entry_x86; \
- __check_kprobe_x86
- #define ENTRY_KPROBE_FINAL_X86 __check_entry_kprobe_x86
- #define ENTRY_X86(name) \
- __check_entry_kprobe_x86; \
- __set_entry_x86; \
- .globl name; \
- __ALIGN; \
- name:
- #define END_X86(name) \
- __unset_entry_x86; \
- __check_entry_kprobe_x86; \
- .size name, .-name
- #define KPROBE_ENTRY_X86(name) \
- __check_entry_kprobe_x86; \
- __set_kprobe_x86; \
- .pushsection .kprobes.text, "ax"; \
- .globl name; \
- __ALIGN; \
- name:
- #define KPROBE_END_X86(name) \
- __unset_kprobe_x86; \
- __check_entry_kprobe_x86; \
- .size name, .-name; \
- .popsection
- #endif /* _ASM_X86_LINKAGE_H */
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