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- #ifndef _ASMAXP_PTRACE_H
- #define _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. I 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;
- /* 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;
- unsigned long fp[32]; /* fp[31] is fpcr */
- };
- #ifdef __KERNEL__
- #define arch_has_single_step() (1)
- #define user_mode(regs) (((regs)->ps & 8) != 0)
- #define instruction_pointer(regs) ((regs)->pc)
- #define profile_pc(regs) instruction_pointer(regs)
- #define task_pt_regs(task) \
- ((struct pt_regs *) (task_stack_page(task) + 2*PAGE_SIZE) - 1)
- #define force_successful_syscall_return() (task_pt_regs(current)->r0 = 0)
- #endif
- #endif
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