arch/um/include/sysdep-x86_64/ptrace.h

/*
 * Copyright 2003 PathScale, Inc.
 *
 * Licensed under the GPL
 */

#ifndef __SYSDEP_X86_64_PTRACE_H
#define __SYSDEP_X86_64_PTRACE_H

#include "uml-config.h"
#include "user_constants.h"
#include "sysdep/faultinfo.h"

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

#ifdef UML_CONFIG_MODE_TT
#include "sysdep/sc.h"
#endif

#ifdef UML_CONFIG_MODE_SKAS
#include "skas_ptregs.h"

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

#define REGS_RBX(r) ((r)[HOST_RBX])
#define REGS_RCX(r) ((r)[HOST_RCX])
#define REGS_RDX(r) ((r)[HOST_RDX])
#define REGS_RSI(r) ((r)[HOST_RSI])
#define REGS_RDI(r) ((r)[HOST_RDI])
#define REGS_RBP(r) ((r)[HOST_RBP])
#define REGS_RAX(r) ((r)[HOST_RAX])
#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_RAX])

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

#define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))

#define REGS_SEGV_IS_FIXABLE(r) SEGV_IS_FIXABLE((r)->trap_type)

#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)

#endif

#include "choose-mode.h"

/* XXX */
union uml_pt_regs {
#ifdef UML_CONFIG_MODE_TT
	struct tt_regs {
		long syscall;
		unsigned long orig_rax;
		void *sc;
                struct faultinfo faultinfo;
	} tt;
#endif
#ifdef UML_CONFIG_MODE_SKAS
	struct skas_regs {
		/* x86_64 ptrace uses sizeof(user_regs_struct) as its register
		 * file size, while i386 uses FRAME_SIZE.  Therefore, we need
		 * to use UM_FRAME_SIZE here instead of HOST_FRAME_SIZE.
		 */
		unsigned long regs[UM_FRAME_SIZE];
		unsigned long fp[HOST_FP_SIZE];
                struct faultinfo faultinfo;
		long syscall;
		int is_user;
	} skas;
#endif
};

#define EMPTY_UML_PT_REGS { }

/* XXX */
extern int mode_tt;

#define UPT_RBX(r) __CHOOSE_MODE(SC_RBX(UPT_SC(r)), REGS_RBX((r)->skas.regs))
#define UPT_RCX(r) __CHOOSE_MODE(SC_RCX(UPT_SC(r)), REGS_RCX((r)->skas.regs))
#define UPT_RDX(r) __CHOOSE_MODE(SC_RDX(UPT_SC(r)), REGS_RDX((r)->skas.regs))
#define UPT_RSI(r) __CHOOSE_MODE(SC_RSI(UPT_SC(r)), REGS_RSI((r)->skas.regs))
#define UPT_RDI(r) __CHOOSE_MODE(SC_RDI(UPT_SC(r)), REGS_RDI((r)->skas.regs))
#define UPT_RBP(r) __CHOOSE_MODE(SC_RBP(UPT_SC(r)), REGS_RBP((r)->skas.regs))
#define UPT_RAX(r) __CHOOSE_MODE(SC_RAX(UPT_SC(r)), REGS_RAX((r)->skas.regs))
#define UPT_R8(r) __CHOOSE_MODE(SC_R8(UPT_SC(r)), REGS_R8((r)->skas.regs))
#define UPT_R9(r) __CHOOSE_MODE(SC_R9(UPT_SC(r)), REGS_R9((r)->skas.regs))
#define UPT_R10(r) __CHOOSE_MODE(SC_R10(UPT_SC(r)), REGS_R10((r)->skas.regs))
#define UPT_R11(r) __CHOOSE_MODE(SC_R11(UPT_SC(r)), REGS_R11((r)->skas.regs))
#define UPT_R12(r) __CHOOSE_MODE(SC_R12(UPT_SC(r)), REGS_R12((r)->skas.regs))
#define UPT_R13(r) __CHOOSE_MODE(SC_R13(UPT_SC(r)), REGS_R13((r)->skas.regs))
#define UPT_R14(r) __CHOOSE_MODE(SC_R14(UPT_SC(r)), REGS_R14((r)->skas.regs))
#define UPT_R15(r) __CHOOSE_MODE(SC_R15(UPT_SC(r)), REGS_R15((r)->skas.regs))
#define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
#define UPT_FS_BASE(r) \
	__CHOOSE_MODE(SC_FS_BASE(UPT_SC(r)), REGS_FS_BASE((r)->skas.regs))
#define UPT_FS(r) __CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs))
#define UPT_GS_BASE(r) \
	__CHOOSE_MODE(SC_GS_BASE(UPT_SC(r)), REGS_GS_BASE((r)->skas.regs))
#define UPT_GS(r) __CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs))
#define UPT_DS(r) __CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs))
#define UPT_ES(r) __CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs))
#define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
#define UPT_SS(r) __CHOOSE_MODE(SC_SS(UPT_SC(r)), REGS_SS((r)->skas.regs))
#define UPT_ORIG_RAX(r) \
	__CHOOSE_MODE((r)->tt.orig_rax, REGS_ORIG_RAX((r)->skas.regs))

#define UPT_IP(r) __CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs))
#define UPT_SP(r) __CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs))

#define UPT_EFLAGS(r) \
	__CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs))
#define UPT_SC(r) ((r)->tt.sc)
#define UPT_SYSCALL_NR(r) __CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall)
#define UPT_SYSCALL_RET(r) UPT_RAX(r)

extern int user_context(unsigned long sp);

#define UPT_IS_USER(r) \
	CHOOSE_MODE(user_context(UPT_SP(r)), (r)->skas.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_REG(regs, reg) \
        ({      unsigned long val; \
                switch(reg){ \
		case R8: val = UPT_R8(regs); break; \
		case R9: val = UPT_R9(regs); break; \
		case R10: val = UPT_R10(regs); break; \
		case R11: val = UPT_R11(regs); break; \
		case R12: val = UPT_R12(regs); break; \
		case R13: val = UPT_R13(regs); break; \
		case R14: val = UPT_R14(regs); break; \
		case R15: val = UPT_R15(regs); break; \
                case RIP: val = UPT_IP(regs); break; \
                case RSP: val = UPT_SP(regs); break; \
                case RAX: val = UPT_RAX(regs); break; \
                case RBX: val = UPT_RBX(regs); break; \
                case RCX: val = UPT_RCX(regs); break; \
                case RDX: val = UPT_RDX(regs); break; \
                case RSI: val = UPT_RSI(regs); break; \
                case RDI: val = UPT_RDI(regs); break; \
                case RBP: val = UPT_RBP(regs); break; \
                case ORIG_RAX: val = UPT_ORIG_RAX(regs); break; \
                case CS: val = UPT_CS(regs); break; \
                case SS: val = UPT_SS(regs); break; \
		case FS_BASE: val = UPT_FS_BASE(regs); break; \
                case GS_BASE: val = UPT_GS_BASE(regs); break; \
                case DS: val = UPT_DS(regs); break; \
                case ES: val = UPT_ES(regs); break; \
                case FS : val = UPT_FS (regs); break; \
		case GS: val = UPT_GS(regs); break;	    \
                case EFLAGS: val = UPT_EFLAGS(regs); break; \
                default :  \
                        panic("Bad register in UPT_REG : %d\n", reg);  \
                        val = -1; \
                } \
                val; \
        })


#define UPT_SET(regs, reg, val) \
        ({      unsigned long __upt_val = val; \
                switch(reg){ \
                case R8: UPT_R8(regs) = __upt_val; break; \
                case R9: UPT_R9(regs) = __upt_val; break; \
                case R10: UPT_R10(regs) = __upt_val; break; \
                case R11: UPT_R11(regs) = __upt_val; break; \
                case R12: UPT_R12(regs) = __upt_val; break; \
                case R13: UPT_R13(regs) = __upt_val; break; \
                case R14: UPT_R14(regs) = __upt_val; break; \
                case R15: UPT_R15(regs) = __upt_val; break; \
                case RIP: UPT_IP(regs) = __upt_val; break; \
                case RSP: UPT_SP(regs) = __upt_val; break; \
                case RAX: UPT_RAX(regs) = __upt_val; break; \
                case RBX: UPT_RBX(regs) = __upt_val; break; \
                case RCX: UPT_RCX(regs) = __upt_val; break; \
                case RDX: UPT_RDX(regs) = __upt_val; break; \
                case RSI: UPT_RSI(regs) = __upt_val; break; \
                case RDI: UPT_RDI(regs) = __upt_val; break; \
                case RBP: UPT_RBP(regs) = __upt_val; break; \
                case ORIG_RAX: UPT_ORIG_RAX(regs) = __upt_val; break; \
                case CS: UPT_CS(regs) = __upt_val; break; \
                case SS: UPT_SS(regs) = __upt_val; break; \
                case FS_BASE: UPT_FS_BASE(regs) = __upt_val; break; \
                case GS_BASE: UPT_GS_BASE(regs) = __upt_val; break; \
                case DS: UPT_DS(regs) = __upt_val; break; \
                case ES: UPT_ES(regs) = __upt_val; break; \
                case FS: UPT_FS(regs) = __upt_val; break; \
                case GS: UPT_GS(regs) = __upt_val; break; \
                case EFLAGS: UPT_EFLAGS(regs) = __upt_val; break; \
                default :  \
                        panic("Bad register in UPT_SET : %d\n", reg);  \
			break; \
                } \
                __upt_val; \
        })

#define UPT_SET_SYSCALL_RETURN(r, res) \
	CHOOSE_MODE(SC_SET_SYSCALL_RETURN(UPT_SC(r), (res)), \
                    REGS_SET_SYSCALL_RETURN((r)->skas.regs, (res)))

#define UPT_RESTART_SYSCALL(r) \
	CHOOSE_MODE(SC_RESTART_SYSCALL(UPT_SC(r)), \
		    REGS_RESTART_SYSCALL((r)->skas.regs))

#define UPT_SEGV_IS_FIXABLE(r) \
	CHOOSE_MODE(SC_SEGV_IS_FIXABLE(UPT_SC(r)), \
                    REGS_SEGV_IS_FIXABLE(&r->skas))

#define UPT_FAULTINFO(r) \
        CHOOSE_MODE((&(r)->tt.faultinfo), (&(r)->skas.faultinfo))

#endif