/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_ASMAXP_PTRACE_H
#define _UAPI_ASMAXP_PTRACE_H


/*
 * This struct defines the way the registers are stored on the
 * kernel stack during a system call or other kernel entry
 *
 * NOTE! I want to minimize the overhead of system calls, so this
 * struct has as little information as possible. It does not have
 *
 *  - floating point regs: the kernel doesn't change those
 *  - r9-15: saved by the C compiler
 *
 * This makes "fork()" and "exec()" a bit more complex, but should
 * give us low system call latency.
 */

struct pt_regs {
        unsigned long r0;
        unsigned long r1;
        unsigned long r2;
        unsigned long r3;
        unsigned long r4;
        unsigned long r5;
        unsigned long r6;
        unsigned long r7;
        unsigned long r8;
        unsigned long r19;
        unsigned long r20;
        unsigned long r21;
        unsigned long r22;
        unsigned long r23;
        unsigned long r24;
        unsigned long r25;
        unsigned long r26;
        unsigned long r27;
        unsigned long r28;
        unsigned long hae;
/* JRP - These are the values provided to a0-a2 by PALcode */
        unsigned long trap_a0;
        unsigned long trap_a1;
        unsigned long trap_a2;
/* This makes the stack 16-byte aligned as GCC expects */
        unsigned long __pad0;
/* These are saved by PAL-code: */
        unsigned long ps;
        unsigned long pc;
        unsigned long gp;
        unsigned long r16;
        unsigned long r17;
        unsigned long r18;
};

/*
 * This is the extended stack used by signal handlers and the context
 * switcher: it's pushed after the normal "struct pt_regs".
 */
struct switch_stack {
        unsigned long r9;
        unsigned long r10;
        unsigned long r11;
        unsigned long r12;
        unsigned long r13;
        unsigned long r14;
        unsigned long r15;
        unsigned long r26;
#ifndef __KERNEL__
        unsigned long fp[32];   /* fp[31] is fpcr */
#endif
};


#endif /* _UAPI_ASMAXP_PTRACE_H */