1 /* 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Licensed under the GPL 4 */ 5 6 #ifndef __SYSDEP_I386_PTRACE_H 7 #define __SYSDEP_I386_PTRACE_H 8 9 #include <generated/user_constants.h> 10 #include "sysdep/faultinfo.h" 11 12 #define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long)) 13 #define MAX_REG_OFFSET (UM_FRAME_SIZE) 14 15 static inline void update_debugregs(int seq) {} 16 17 /* syscall emulation path in ptrace */ 18 19 #ifndef PTRACE_SYSEMU 20 #define PTRACE_SYSEMU 31 21 #endif 22 23 void set_using_sysemu(int value); 24 int get_using_sysemu(void); 25 extern int sysemu_supported; 26 27 #define REGS_IP(r) ((r)[HOST_IP]) 28 #define REGS_SP(r) ((r)[HOST_SP]) 29 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS]) 30 #define REGS_EAX(r) ((r)[HOST_AX]) 31 #define REGS_EBX(r) ((r)[HOST_BX]) 32 #define REGS_ECX(r) ((r)[HOST_CX]) 33 #define REGS_EDX(r) ((r)[HOST_DX]) 34 #define REGS_ESI(r) ((r)[HOST_SI]) 35 #define REGS_EDI(r) ((r)[HOST_DI]) 36 #define REGS_EBP(r) ((r)[HOST_BP]) 37 #define REGS_CS(r) ((r)[HOST_CS]) 38 #define REGS_SS(r) ((r)[HOST_SS]) 39 #define REGS_DS(r) ((r)[HOST_DS]) 40 #define REGS_ES(r) ((r)[HOST_ES]) 41 #define REGS_FS(r) ((r)[HOST_FS]) 42 #define REGS_GS(r) ((r)[HOST_GS]) 43 44 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_EAX(r) = (res) 45 46 #define IP_RESTART_SYSCALL(ip) ((ip) -= 2) 47 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r)) 48 49 #ifndef PTRACE_SYSEMU_SINGLESTEP 50 #define PTRACE_SYSEMU_SINGLESTEP 32 51 #endif 52 53 struct uml_pt_regs { 54 unsigned long gp[MAX_REG_NR]; 55 unsigned long fp[HOST_FPX_SIZE]; 56 struct faultinfo faultinfo; 57 long syscall; 58 int is_user; 59 }; 60 61 #define EMPTY_UML_PT_REGS { } 62 63 #define UPT_IP(r) REGS_IP((r)->gp) 64 #define UPT_SP(r) REGS_SP((r)->gp) 65 #define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp) 66 #define UPT_EAX(r) REGS_EAX((r)->gp) 67 #define UPT_EBX(r) REGS_EBX((r)->gp) 68 #define UPT_ECX(r) REGS_ECX((r)->gp) 69 #define UPT_EDX(r) REGS_EDX((r)->gp) 70 #define UPT_ESI(r) REGS_ESI((r)->gp) 71 #define UPT_EDI(r) REGS_EDI((r)->gp) 72 #define UPT_EBP(r) REGS_EBP((r)->gp) 73 #define UPT_ORIG_EAX(r) ((r)->syscall) 74 #define UPT_CS(r) REGS_CS((r)->gp) 75 #define UPT_SS(r) REGS_SS((r)->gp) 76 #define UPT_DS(r) REGS_DS((r)->gp) 77 #define UPT_ES(r) REGS_ES((r)->gp) 78 #define UPT_FS(r) REGS_FS((r)->gp) 79 #define UPT_GS(r) REGS_GS((r)->gp) 80 81 #define UPT_SYSCALL_ARG1(r) UPT_EBX(r) 82 #define UPT_SYSCALL_ARG2(r) UPT_ECX(r) 83 #define UPT_SYSCALL_ARG3(r) UPT_EDX(r) 84 #define UPT_SYSCALL_ARG4(r) UPT_ESI(r) 85 #define UPT_SYSCALL_ARG5(r) UPT_EDI(r) 86 #define UPT_SYSCALL_ARG6(r) UPT_EBP(r) 87 88 extern int user_context(unsigned long sp); 89 90 #define UPT_IS_USER(r) ((r)->is_user) 91 92 struct syscall_args { 93 unsigned long args[6]; 94 }; 95 96 #define SYSCALL_ARGS(r) ((struct syscall_args) \ 97 { .args = { UPT_SYSCALL_ARG1(r), \ 98 UPT_SYSCALL_ARG2(r), \ 99 UPT_SYSCALL_ARG3(r), \ 100 UPT_SYSCALL_ARG4(r), \ 101 UPT_SYSCALL_ARG5(r), \ 102 UPT_SYSCALL_ARG6(r) } } ) 103 104 #define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp) 105 106 #define UPT_ORIG_SYSCALL(r) UPT_EAX(r) 107 #define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r) 108 #define UPT_SYSCALL_RET(r) UPT_EAX(r) 109 110 #define UPT_FAULTINFO(r) (&(r)->faultinfo) 111 112 extern void arch_init_registers(int pid); 113 114 #endif 115