/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * arch/wasm32/include/uapi/asm/ptrace.h
 *
 * wasm32 has no introspectable hardware register file: each Worker is a
 * private VM with no abstraction for "the registers" outside the
 * function-call WebAssembly model. We expose a minimal user_regs_struct
 * for ptrace() ABI completeness; in practice the only field that ever
 * varies meaningfully is `pc`, which we use as a logical instruction
 * pointer carried by HardwareJS (== the call-stack frame the Worker is
 * currently executing inside).
 */
#ifndef _ASM_WASM32_PTRACE_H
#define _ASM_WASM32_PTRACE_H

#ifndef __ASSEMBLY__
#include <linux/types.h>

struct user_regs_struct {
	__u32 pc;	/* logical instruction pointer (HardwareJS-provided) */
	__u32 sp;	/* logical stack pointer in memory 0 */
	__u32 a0;
	__u32 a1;
	__u32 a2;
	__u32 a3;
	__u32 a4;
	__u32 a5;	/* the six syscall arg registers */
	__u32 ret;	/* syscall return value */
};

#endif /* !__ASSEMBLY__ */
#endif /* _ASM_WASM32_PTRACE_H */