arch/um/include/sysdep-i386/ptrace.h

/*
 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Licensed under the GPL
 */

#ifndef __SYSDEP_I386_PTRACE_H
#define __SYSDEP_I386_PTRACE_H

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

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

static inline void update_debugregs(int seq) {}

/* syscall emulation path in ptrace */

#ifndef PTRACE_SYSEMU
#define PTRACE_SYSEMU 31
#endif

void set_using_sysemu(int value);
int get_using_sysemu(void);
extern int sysemu_supported;

#include "skas_ptregs.h"

#define REGS_IP(r) ((r)[HOST_IP])
#define REGS_SP(r) ((r)[HOST_SP])
#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
#define REGS_EAX(r) ((r)[HOST_EAX])
#define REGS_EBX(r) ((r)[HOST_EBX])
#define REGS_ECX(r) ((r)[HOST_ECX])
#define REGS_EDX(r) ((r)[HOST_EDX])
#define REGS_ESI(r) ((r)[HOST_ESI])
#define REGS_EDI(r) ((r)[HOST_EDI])
#define REGS_EBP(r) ((r)[HOST_EBP])
#define REGS_CS(r) ((r)[HOST_CS])
#define REGS_SS(r) ((r)[HOST_SS])
#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_SET_SYSCALL_RETURN(r, res) REGS_EAX(r) = (res)

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

#ifndef PTRACE_SYSEMU_SINGLESTEP
#define PTRACE_SYSEMU_SINGLESTEP 32
#endif

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

#define EMPTY_UML_PT_REGS { }

#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_EAX(r) REGS_EAX((r)->gp)
#define UPT_EBX(r) REGS_EBX((r)->gp)
#define UPT_ECX(r) REGS_ECX((r)->gp)
#define UPT_EDX(r) REGS_EDX((r)->gp)
#define UPT_ESI(r) REGS_ESI((r)->gp)
#define UPT_EDI(r) REGS_EDI((r)->gp)
#define UPT_EBP(r) REGS_EBP((r)->gp)
#define UPT_ORIG_EAX(r) ((r)->syscall)
#define UPT_CS(r) REGS_CS((r)->gp)
#define UPT_SS(r) REGS_SS((r)->gp)
#define UPT_DS(r) REGS_DS((r)->gp)
#define UPT_ES(r) REGS_ES((r)->gp)
#define UPT_FS(r) REGS_FS((r)->gp)
#define UPT_GS(r) REGS_GS((r)->gp)

#define UPT_SYSCALL_ARG1(r) UPT_EBX(r)
#define UPT_SYSCALL_ARG2(r) UPT_ECX(r)
#define UPT_SYSCALL_ARG3(r) UPT_EDX(r)
#define UPT_SYSCALL_ARG4(r) UPT_ESI(r)
#define UPT_SYSCALL_ARG5(r) UPT_EDI(r)
#define UPT_SYSCALL_ARG6(r) UPT_EBP(r)

extern int user_context(unsigned long sp);

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

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 EIP: val = UPT_IP(regs); break; \
		case UESP: val = UPT_SP(regs); break; \
		case EAX: val = UPT_EAX(regs); break; \
		case EBX: val = UPT_EBX(regs); break; \
		case ECX: val = UPT_ECX(regs); break; \
		case EDX: val = UPT_EDX(regs); break; \
		case ESI: val = UPT_ESI(regs); break; \
		case EDI: val = UPT_EDI(regs); break; \
		case EBP: val = UPT_EBP(regs); break; \
		case ORIG_EAX: val = UPT_ORIG_EAX(regs); break; \
		case CS: val = UPT_CS(regs); break; \
		case SS: val = UPT_SS(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 EFL: val = UPT_EFLAGS(regs); break; \
		default :  \
			panic("Bad register in UPT_REG : %d\n", reg);  \
			val = -1; \
		} \
	        val; \
	})

#define UPT_SET(regs, reg, val) \
	do { \
		switch(reg){ \
		case EIP: UPT_IP(regs) = val; break; \
		case UESP: UPT_SP(regs) = val; break; \
		case EAX: UPT_EAX(regs) = val; break; \
		case EBX: UPT_EBX(regs) = val; break; \
		case ECX: UPT_ECX(regs) = val; break; \
		case EDX: UPT_EDX(regs) = val; break; \
		case ESI: UPT_ESI(regs) = val; break; \
		case EDI: UPT_EDI(regs) = val; break; \
		case EBP: UPT_EBP(regs) = val; break; \
		case ORIG_EAX: UPT_ORIG_EAX(regs) = val; break; \
		case CS: UPT_CS(regs) = val; break; \
		case SS: UPT_SS(regs) = val; break; \
		case DS: UPT_DS(regs) = val; break; \
		case ES: UPT_ES(regs) = val; break; \
		case FS: UPT_FS(regs) = val; break; \
		case GS: UPT_GS(regs) = val; break; \
		case EFL: UPT_EFLAGS(regs) = val; break; \
		default :  \
			panic("Bad register in UPT_SET : %d\n", reg);  \
			break; \
		} \
	} while (0)

#define UPT_SET_SYSCALL_RETURN(r, res) \
	REGS_SET_SYSCALL_RETURN((r)->regs, (res))

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

#define UPT_ORIG_SYSCALL(r) UPT_EAX(r)
#define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r)
#define UPT_SYSCALL_RET(r) UPT_EAX(r)

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

extern void arch_init_registers(int pid);

#endif