72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_ASMAXP_PTRACE_H
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#define _UAPI_ASMAXP_PTRACE_H
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/*
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* This struct defines the way the registers are stored on the
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* kernel stack during a system call or other kernel entry
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*
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* NOTE! I want to minimize the overhead of system calls, so this
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* struct has as little information as possible. It does not have
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*
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* - floating point regs: the kernel doesn't change those
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* - r9-15: saved by the C compiler
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*
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* This makes "fork()" and "exec()" a bit more complex, but should
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* give us low system call latency.
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*/
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struct pt_regs {
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unsigned long r0;
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unsigned long r1;
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unsigned long r2;
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unsigned long r3;
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unsigned long r4;
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unsigned long r5;
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unsigned long r6;
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unsigned long r7;
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unsigned long r8;
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unsigned long r19;
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unsigned long r20;
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unsigned long r21;
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unsigned long r22;
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unsigned long r23;
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unsigned long r24;
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unsigned long r25;
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unsigned long r26;
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unsigned long r27;
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unsigned long r28;
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unsigned long hae;
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/* JRP - These are the values provided to a0-a2 by PALcode */
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unsigned long trap_a0;
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unsigned long trap_a1;
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unsigned long trap_a2;
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/* These are saved by PAL-code: */
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unsigned long ps;
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unsigned long pc;
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unsigned long gp;
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unsigned long r16;
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unsigned long r17;
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unsigned long r18;
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};
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/*
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* This is the extended stack used by signal handlers and the context
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* switcher: it's pushed after the normal "struct pt_regs".
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*/
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struct switch_stack {
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unsigned long r9;
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unsigned long r10;
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unsigned long r11;
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unsigned long r12;
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unsigned long r13;
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unsigned long r14;
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unsigned long r15;
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unsigned long r26;
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unsigned long fp[32]; /* fp[31] is fpcr */
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};
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#endif /* _UAPI_ASMAXP_PTRACE_H */
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