linux-stable-rt/arch/x86/um/shared/sysdep/ptrace_64.h

/*
 * Copyright 2003 PathScale, Inc.
 * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 *
 * Licensed under the GPL
 */

#ifndef __SYSDEP_X86_64_PTRACE_H
#define __SYSDEP_X86_64_PTRACE_H

#include <generated/user_constants.h>
#include "sysdep/faultinfo.h"

#define MAX_REG_OFFSET (UM_FRAME_SIZE)
#define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long))

#define REGS_IP(r) ((r)[HOST_IP])
#define REGS_SP(r) ((r)[HOST_SP])

#define REGS_RBX(r) ((r)[HOST_BX])
#define REGS_RCX(r) ((r)[HOST_CX])
#define REGS_RDX(r) ((r)[HOST_DX])
#define REGS_RSI(r) ((r)[HOST_SI])
#define REGS_RDI(r) ((r)[HOST_DI])
#define REGS_RBP(r) ((r)[HOST_BP])
#define REGS_RAX(r) ((r)[HOST_AX])
#define REGS_R8(r) ((r)[HOST_R8])
#define REGS_R9(r) ((r)[HOST_R9])
#define REGS_R10(r) ((r)[HOST_R10])
#define REGS_R11(r) ((r)[HOST_R11])
#define REGS_R12(r) ((r)[HOST_R12])
#define REGS_R13(r) ((r)[HOST_R13])
#define REGS_R14(r) ((r)[HOST_R14])
#define REGS_R15(r) ((r)[HOST_R15])
#define REGS_CS(r) ((r)[HOST_CS])
#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
#define REGS_SS(r) ((r)[HOST_SS])

#define HOST_FS_BASE 21
#define HOST_GS_BASE 22
#define HOST_DS 23
#define HOST_ES 24
#define HOST_FS 25
#define HOST_GS 26

/* Also defined in asm/ptrace-x86_64.h, but not in libc headers.  So, these
 * are already defined for kernel code, but not for userspace code.
 */
#ifndef FS_BASE
/* These aren't defined in ptrace.h, but exist in struct user_regs_struct,
 * which is what x86_64 ptrace actually uses.
 */
#define FS_BASE (HOST_FS_BASE * sizeof(long))
#define GS_BASE (HOST_GS_BASE * sizeof(long))
#define DS (HOST_DS * sizeof(long))
#define ES (HOST_ES * sizeof(long))
#define FS (HOST_FS * sizeof(long))
#define GS (HOST_GS * sizeof(long))
#endif

#define REGS_FS_BASE(r) ((r)[HOST_FS_BASE])
#define REGS_GS_BASE(r) ((r)[HOST_GS_BASE])
#define REGS_DS(r) ((r)[HOST_DS])
#define REGS_ES(r) ((r)[HOST_ES])
#define REGS_FS(r) ((r)[HOST_FS])
#define REGS_GS(r) ((r)[HOST_GS])

#define REGS_ORIG_RAX(r) ((r)[HOST_ORIG_AX])

#define REGS_SET_SYSCALL_RETURN(r, res) REGS_RAX(r) = (res)

#define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
#define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))

#define REGS_FAULT_ADDR(r) ((r)->fault_addr)

#define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)

#define REGS_TRAP(r) ((r)->trap_type)

#define REGS_ERR(r) ((r)->fault_type)

struct uml_pt_regs {
	unsigned long gp[MAX_REG_NR];
	unsigned long fp[HOST_FP_SIZE];
	struct faultinfo faultinfo;
	long syscall;
	int is_user;
};

#define EMPTY_UML_PT_REGS { }

#define UPT_RBX(r) REGS_RBX((r)->gp)
#define UPT_RCX(r) REGS_RCX((r)->gp)
#define UPT_RDX(r) REGS_RDX((r)->gp)
#define UPT_RSI(r) REGS_RSI((r)->gp)
#define UPT_RDI(r) REGS_RDI((r)->gp)
#define UPT_RBP(r) REGS_RBP((r)->gp)
#define UPT_RAX(r) REGS_RAX((r)->gp)
#define UPT_R8(r) REGS_R8((r)->gp)
#define UPT_R9(r) REGS_R9((r)->gp)
#define UPT_R10(r) REGS_R10((r)->gp)
#define UPT_R11(r) REGS_R11((r)->gp)
#define UPT_R12(r) REGS_R12((r)->gp)
#define UPT_R13(r) REGS_R13((r)->gp)
#define UPT_R14(r) REGS_R14((r)->gp)
#define UPT_R15(r) REGS_R15((r)->gp)
#define UPT_CS(r) REGS_CS((r)->gp)
#define UPT_FS_BASE(r) REGS_FS_BASE((r)->gp)
#define UPT_FS(r) REGS_FS((r)->gp)
#define UPT_GS_BASE(r) REGS_GS_BASE((r)->gp)
#define UPT_GS(r) REGS_GS((r)->gp)
#define UPT_DS(r) REGS_DS((r)->gp)
#define UPT_ES(r) REGS_ES((r)->gp)
#define UPT_CS(r) REGS_CS((r)->gp)
#define UPT_SS(r) REGS_SS((r)->gp)
#define UPT_ORIG_RAX(r) REGS_ORIG_RAX((r)->gp)

#define UPT_IP(r) REGS_IP((r)->gp)
#define UPT_SP(r) REGS_SP((r)->gp)

#define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp)
#define UPT_SYSCALL_NR(r) ((r)->syscall)
#define UPT_SYSCALL_RET(r) UPT_RAX(r)

extern int user_context(unsigned long sp);

#define UPT_IS_USER(r) ((r)->is_user)

#define UPT_SYSCALL_ARG1(r) UPT_RDI(r)
#define UPT_SYSCALL_ARG2(r) UPT_RSI(r)
#define UPT_SYSCALL_ARG3(r) UPT_RDX(r)
#define UPT_SYSCALL_ARG4(r) UPT_R10(r)
#define UPT_SYSCALL_ARG5(r) UPT_R8(r)
#define UPT_SYSCALL_ARG6(r) UPT_R9(r)

struct syscall_args {
	unsigned long args[6];
};

#define SYSCALL_ARGS(r) ((struct syscall_args) \
			 { .args = { UPT_SYSCALL_ARG1(r),	 \
				     UPT_SYSCALL_ARG2(r),	 \
				     UPT_SYSCALL_ARG3(r),	 \
				     UPT_SYSCALL_ARG4(r),	 \
				     UPT_SYSCALL_ARG5(r),	 \
				     UPT_SYSCALL_ARG6(r) } } )

#define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp)

#define UPT_FAULTINFO(r) (&(r)->faultinfo)

static inline void arch_init_registers(int pid)
{
}

#endif