File:  [Qemu by Fabrice Bellard] / qemu / softmmu-semi.h
Revision 1.1.1.3 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 18:56:38 2018 UTC (3 years, 3 months ago) by root
Branches: qemu, MAIN
CVS tags: qemu1001, qemu1000, qemu0151, HEAD
qemu 0.15.1

    1: /*
    2:  * Helper routines to provide target memory access for semihosting
    3:  * syscalls in system emulation mode.
    4:  *
    5:  * Copyright (c) 2007 CodeSourcery.
    6:  *
    7:  * This code is licensed under the GPL
    8:  */
    9: 
   10: static inline uint32_t softmmu_tget32(CPUState *env, uint32_t addr)
   11: {
   12:     uint32_t val;
   13: 
   14:     cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 0);
   15:     return tswap32(val);
   16: }
   17: static inline uint32_t softmmu_tget8(CPUState *env, uint32_t addr)
   18: {
   19:     uint8_t val;
   20: 
   21:     cpu_memory_rw_debug(env, addr, &val, 1, 0);
   22:     return val;
   23: }
   24: 
   25: #define get_user_u32(arg, p) ({ arg = softmmu_tget32(env, p) ; 0; })
   26: #define get_user_u8(arg, p) ({ arg = softmmu_tget8(env, p) ; 0; })
   27: #define get_user_ual(arg, p) get_user_u32(arg, p)
   28: 
   29: static inline void softmmu_tput32(CPUState *env, uint32_t addr, uint32_t val)
   30: {
   31:     val = tswap32(val);
   32:     cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 1);
   33: }
   34: #define put_user_u32(arg, p) ({ softmmu_tput32(env, p, arg) ; 0; })
   35: #define put_user_ual(arg, p) put_user_u32(arg, p)
   36: 
   37: static void *softmmu_lock_user(CPUState *env, uint32_t addr, uint32_t len,
   38:                                int copy)
   39: {
   40:     uint8_t *p;
   41:     /* TODO: Make this something that isn't fixed size.  */
   42:     p = malloc(len);
   43:     if (copy)
   44:         cpu_memory_rw_debug(env, addr, p, len, 0);
   45:     return p;
   46: }
   47: #define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)
   48: static char *softmmu_lock_user_string(CPUState *env, uint32_t addr)
   49: {
   50:     char *p;
   51:     char *s;
   52:     uint8_t c;
   53:     /* TODO: Make this something that isn't fixed size.  */
   54:     s = p = malloc(1024);
   55:     do {
   56:         cpu_memory_rw_debug(env, addr, &c, 1, 0);
   57:         addr++;
   58:         *(p++) = c;
   59:     } while (c);
   60:     return s;
   61: }
   62: #define lock_user_string(p) softmmu_lock_user_string(env, p)
   63: static void softmmu_unlock_user(CPUState *env, void *p, target_ulong addr,
   64:                                 target_ulong len)
   65: {
   66:     if (len)
   67:         cpu_memory_rw_debug(env, addr, p, len, 1);
   68:     free(p);
   69: }
   70: #define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)

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