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Emit nop1,nop5 instructions for x86_64 usdt probe #15

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Merged
anakryiko merged 1 commit into from
Feb 9, 2026
Merged

Emit nop1,nop5 instructions for x86_64 usdt probe #15

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2 changes: 2 additions & 0 deletions usdt.h
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Original file line number Diff line number Diff line change
Expand Up @@ -312,6 +312,8 @@ struct usdt_sema { volatile unsigned short active; };
#ifndef USDT_NOP
#if defined(__ia64__) || defined(__s390__) || defined(__s390x__)
#define USDT_NOP nop 0
#elif defined(__x86_64__)
#define USDT_NOP .byte 0x90, 0x0f, 0x1f, 0x44, 0x00, 0x0 /* nop, nop5 */
#else
#define USDT_NOP nop
#endif
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