/* 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 */
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