From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-alpha/ptrace.h | 82 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 include/asm-alpha/ptrace.h (limited to 'include/asm-alpha/ptrace.h') diff --git a/include/asm-alpha/ptrace.h b/include/asm-alpha/ptrace.h new file mode 100644 index 00000000000..d462c5e14c1 --- /dev/null +++ b/include/asm-alpha/ptrace.h @@ -0,0 +1,82 @@ +#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 user_mode(regs) (((regs)->ps & 8) != 0) +#define instruction_pointer(regs) ((regs)->pc) +#define profile_pc(regs) instruction_pointer(regs) +extern void show_regs(struct pt_regs *); + +#define alpha_task_regs(task) \ + ((struct pt_regs *) ((long) (task)->thread_info + 2*PAGE_SIZE) - 1) + +#define force_successful_syscall_return() (alpha_task_regs(current)->r0 = 0) + +#endif + +#endif -- cgit v1.2.3