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Diffstat (limited to 'arch/alpha/include/uapi/asm/ptrace.h')
| -rw-r--r-- | arch/alpha/include/uapi/asm/ptrace.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/alpha/include/uapi/asm/ptrace.h b/arch/alpha/include/uapi/asm/ptrace.h new file mode 100644 index 000000000..c29194181 --- /dev/null +++ b/arch/alpha/include/uapi/asm/ptrace.h @@ -0,0 +1,71 @@ +/* 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; +/* 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 */ +}; + + +#endif /* _UAPI_ASMAXP_PTRACE_H */ |