linux-user/user-internals.h

   1 /*
   2  * user-internals.h: prototypes etc internal to the linux-user implementation
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef LINUX_USER_USER_INTERNALS_H
  19 #define LINUX_USER_USER_INTERNALS_H
  20
  21 #include "hostdep.h"
  22 #include "exec/user/thunk.h"
  23 #include "exec/exec-all.h"
  24 #include "qemu/log.h"
  25
  26 extern char *exec_path;
  27 void init_task_state(TaskState *ts);
  28 void task_settid(TaskState *);
  29 void stop_all_tasks(void);
  30 extern const char *qemu_uname_release;
  31 extern unsigned long mmap_min_addr;
  32
  33 typedef struct IOCTLEntry IOCTLEntry;
  34
  35 typedef abi_long do_ioctl_fn(const IOCTLEntry *ie, uint8_t *buf_temp,
  36                              int fd, int cmd, abi_long arg);
  37
  38 struct IOCTLEntry {
  39     int target_cmd;
  40     unsigned int host_cmd;
  41     const char *name;
  42     int access;
  43     do_ioctl_fn *do_ioctl;
  44     const argtype arg_type[5];
  45 };
  46
  47 extern IOCTLEntry ioctl_entries[];
  48
  49 #define IOC_R 0x0001
  50 #define IOC_W 0x0002
  51 #define IOC_RW (IOC_R | IOC_W)
  52
  53 /*
  54  * Returns true if the image uses the FDPIC ABI. If this is the case,
  55  * we have to provide some information (loadmap, pt_dynamic_info) such
  56  * that the program can be relocated adequately. This is also useful
  57  * when handling signals.
  58  */
  59 int info_is_fdpic(struct image_info *info);
  60
  61 void target_set_brk(abi_ulong new_brk);
  62 void syscall_init(void);
  63 abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
  64                     abi_long arg2, abi_long arg3, abi_long arg4,
  65                     abi_long arg5, abi_long arg6, abi_long arg7,
  66                     abi_long arg8);
  67 extern __thread CPUState *thread_cpu;
  68 void cpu_loop(CPUArchState *env);
  69 const char *target_strerror(int err);
  70 int get_osversion(void);
  71 void init_qemu_uname_release(void);
  72 void fork_start(void);
  73 void fork_end(int child);
  74
  75 /**
  76  * probe_guest_base:
  77  * @image_name: the executable being loaded
  78  * @loaddr: the lowest fixed address in the executable
  79  * @hiaddr: the highest fixed address in the executable
  80  *
  81  * Creates the initial guest address space in the host memory space.
  82  *
  83  * If @loaddr == 0, then no address in the executable is fixed,
  84  * i.e. it is fully relocatable.  In that case @hiaddr is the size
  85  * of the executable.
  86  *
  87  * This function will not return if a valid value for guest_base
  88  * cannot be chosen.  On return, the executable loader can expect
  89  *
  90  *    target_mmap(loaddr, hiaddr - loaddr, ...)
  91  *
  92  * to succeed.
  93  */
  94 void probe_guest_base(const char *image_name,
  95                       abi_ulong loaddr, abi_ulong hiaddr);
  96
  97 /* syscall.c */
  98 int host_to_target_waitstatus(int status);
  99
 100 #ifdef TARGET_I386
 101 /* vm86.c */
 102 void save_v86_state(CPUX86State *env);
 103 void handle_vm86_trap(CPUX86State *env, int trapno);
 104 void handle_vm86_fault(CPUX86State *env);
 105 int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr);
 106 #elif defined(TARGET_SPARC64)
 107 void sparc64_set_context(CPUSPARCState *env);
 108 void sparc64_get_context(CPUSPARCState *env);
 109 #endif
 110
 111 static inline int is_error(abi_long ret)
 112 {
 113     return (abi_ulong)ret >= (abi_ulong)(-4096);
 114 }
 115
 116 #if TARGET_ABI_BITS == 32
 117 static inline uint64_t target_offset64(uint32_t word0, uint32_t word1)
 118 {
 119 #ifdef TARGET_WORDS_BIGENDIAN
 120     return ((uint64_t)word0 << 32) | word1;
 121 #else
 122     return ((uint64_t)word1 << 32) | word0;
 123 #endif
 124 }
 125 #else /* TARGET_ABI_BITS == 32 */
 126 static inline uint64_t target_offset64(uint64_t word0, uint64_t word1)
 127 {
 128     return word0;
 129 }
 130 #endif /* TARGET_ABI_BITS != 32 */
 131
 132 void print_termios(void *arg);
 133
 134 /* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */
 135 #ifdef TARGET_ARM
 136 static inline int regpairs_aligned(void *cpu_env, int num)
 137 {
 138     return ((((CPUARMState *)cpu_env)->eabi) == 1) ;
 139 }
 140 #elif defined(TARGET_MIPS) && (TARGET_ABI_BITS == 32)
 141 static inline int regpairs_aligned(void *cpu_env, int num) { return 1; }
 142 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
 143 /*
 144  * SysV AVI for PPC32 expects 64bit parameters to be passed on odd/even pairs
 145  * of registers which translates to the same as ARM/MIPS, because we start with
 146  * r3 as arg1
 147  */
 148 static inline int regpairs_aligned(void *cpu_env, int num) { return 1; }
 149 #elif defined(TARGET_SH4)
 150 /* SH4 doesn't align register pairs, except for p{read,write}64 */
 151 static inline int regpairs_aligned(void *cpu_env, int num)
 152 {
 153     switch (num) {
 154     case TARGET_NR_pread64:
 155     case TARGET_NR_pwrite64:
 156         return 1;
 157
 158     default:
 159         return 0;
 160     }
 161 }
 162 #elif defined(TARGET_XTENSA)
 163 static inline int regpairs_aligned(void *cpu_env, int num) { return 1; }
 164 #elif defined(TARGET_HEXAGON)
 165 static inline int regpairs_aligned(void *cpu_env, int num) { return 1; }
 166 #else
 167 static inline int regpairs_aligned(void *cpu_env, int num) { return 0; }
 168 #endif
 169
 170 /**
 171  * preexit_cleanup: housekeeping before the guest exits
 172  *
 173  * env: the CPU state
 174  * code: the exit code
 175  */
 176 void preexit_cleanup(CPUArchState *env, int code);
 177
 178 /*
 179  * Include target-specific struct and function definitions;
 180  * they may need access to the target-independent structures
 181  * above, so include them last.
 182  */
 183 #include "target_cpu.h"
 184 #include "target_structs.h"
 185
 186 #endif