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 "exec/user/thunk.h"
  22 #include "exec/exec-all.h"
  23 #include "qemu/log.h"
  24
  25 extern char *exec_path;
  26 void init_task_state(TaskState *ts);
  27 void task_settid(TaskState *);
  28 void stop_all_tasks(void);
  29 extern const char *qemu_uname_release;
  30 extern unsigned long mmap_min_addr;
  31
  32 typedef struct IOCTLEntry IOCTLEntry;
  33
  34 typedef abi_long do_ioctl_fn(const IOCTLEntry *ie, uint8_t *buf_temp,
  35                              int fd, int cmd, abi_long arg);
  36
  37 struct IOCTLEntry {
  38     int target_cmd;
  39     unsigned int host_cmd;
  40     const char *name;
  41     int access;
  42     do_ioctl_fn *do_ioctl;
  43     const argtype arg_type[5];
  44 };
  45
  46 extern IOCTLEntry ioctl_entries[];
  47
  48 #define IOC_R 0x0001
  49 #define IOC_W 0x0002
  50 #define IOC_RW (IOC_R | IOC_W)
  51
  52 /*
  53  * Returns true if the image uses the FDPIC ABI. If this is the case,
  54  * we have to provide some information (loadmap, pt_dynamic_info) such
  55  * that the program can be relocated adequately. This is also useful
  56  * when handling signals.
  57  */
  58 int info_is_fdpic(struct image_info *info);
  59
  60 void target_set_brk(abi_ulong new_brk);
  61 void syscall_init(void);
  62 abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
  63                     abi_long arg2, abi_long arg3, abi_long arg4,
  64                     abi_long arg5, abi_long arg6, abi_long arg7,
  65                     abi_long arg8);
  66 extern __thread CPUState *thread_cpu;
  67 void QEMU_NORETURN cpu_loop(CPUArchState *env);
  68 const char *target_strerror(int err);
  69 int get_osversion(void);
  70 void init_qemu_uname_release(void);
  71 void fork_start(void);
  72 void fork_end(int child);
  73
  74 /**
  75  * probe_guest_base:
  76  * @image_name: the executable being loaded
  77  * @loaddr: the lowest fixed address in the executable
  78  * @hiaddr: the highest fixed address in the executable
  79  *
  80  * Creates the initial guest address space in the host memory space.
  81  *
  82  * If @loaddr == 0, then no address in the executable is fixed,
  83  * i.e. it is fully relocatable.  In that case @hiaddr is the size
  84  * of the executable.
  85  *
  86  * This function will not return if a valid value for guest_base
  87  * cannot be chosen.  On return, the executable loader can expect
  88  *
  89  *    target_mmap(loaddr, hiaddr - loaddr, ...)
  90  *
  91  * to succeed.
  92  */
  93 void probe_guest_base(const char *image_name,
  94                       abi_ulong loaddr, abi_ulong hiaddr);
  95
  96 /* syscall.c */
  97 int host_to_target_waitstatus(int status);
  98
  99 #ifdef TARGET_I386
 100 /* vm86.c */
 101 void save_v86_state(CPUX86State *env);
 102 void handle_vm86_trap(CPUX86State *env, int trapno);
 103 void handle_vm86_fault(CPUX86State *env);
 104 int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr);
 105 #elif defined(TARGET_SPARC64)
 106 void sparc64_set_context(CPUSPARCState *env);
 107 void sparc64_get_context(CPUSPARCState *env);
 108 #endif
 109
 110 static inline int is_error(abi_long ret)
 111 {
 112     return (abi_ulong)ret >= (abi_ulong)(-4096);
 113 }
 114
 115 #if TARGET_ABI_BITS == 32
 116 static inline uint64_t target_offset64(uint32_t word0, uint32_t word1)
 117 {
 118 #ifdef TARGET_WORDS_BIGENDIAN
 119     return ((uint64_t)word0 << 32) | word1;
 120 #else
 121     return ((uint64_t)word1 << 32) | word0;
 122 #endif
 123 }
 124 #else /* TARGET_ABI_BITS == 32 */
 125 static inline uint64_t target_offset64(uint64_t word0, uint64_t word1)
 126 {
 127     return word0;
 128 }
 129 #endif /* TARGET_ABI_BITS != 32 */
 130
 131 void print_termios(void *arg);
 132
 133 /* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */
 134 #ifdef TARGET_ARM
 135 static inline int regpairs_aligned(void *cpu_env, int num)
 136 {
 137     return ((((CPUARMState *)cpu_env)->eabi) == 1) ;
 138 }
 139 #elif defined(TARGET_MIPS) && (TARGET_ABI_BITS == 32)
 140 static inline int regpairs_aligned(void *cpu_env, int num) { return 1; }
 141 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
 142 /*
 143  * SysV AVI for PPC32 expects 64bit parameters to be passed on odd/even pairs
 144  * of registers which translates to the same as ARM/MIPS, because we start with
 145  * r3 as arg1
 146  */
 147 static inline int regpairs_aligned(void *cpu_env, int num) { return 1; }
 148 #elif defined(TARGET_SH4)
 149 /* SH4 doesn't align register pairs, except for p{read,write}64 */
 150 static inline int regpairs_aligned(void *cpu_env, int num)
 151 {
 152     switch (num) {
 153     case TARGET_NR_pread64:
 154     case TARGET_NR_pwrite64:
 155         return 1;
 156
 157     default:
 158         return 0;
 159     }
 160 }
 161 #elif defined(TARGET_XTENSA)
 162 static inline int regpairs_aligned(void *cpu_env, int num) { return 1; }
 163 #elif defined(TARGET_HEXAGON)
 164 static inline int regpairs_aligned(void *cpu_env, int num) { return 1; }
 165 #else
 166 static inline int regpairs_aligned(void *cpu_env, int num) { return 0; }
 167 #endif
 168
 169 /**
 170  * preexit_cleanup: housekeeping before the guest exits
 171  *
 172  * env: the CPU state
 173  * code: the exit code
 174  */
 175 void preexit_cleanup(CPUArchState *env, int code);
 176
 177 /*
 178  * Include target-specific struct and function definitions;
 179  * they may need access to the target-independent structures
 180  * above, so include them last.
 181  */
 182 #include "target_cpu.h"
 183 #include "target_structs.h"
 184
 185 #endif