b55266b5a2
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5275 c046a42c-6fe2-441c-8c8c-71466251a162
71 lines
2 KiB
C
71 lines
2 KiB
C
/*
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* Helper routines to provide target memory access for semihosting
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* syscalls in system emulation mode.
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*
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* Copyright (c) 2007 CodeSourcery.
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*
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* This code is licenced under the GPL
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*/
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static inline uint32_t softmmu_tget32(CPUState *env, uint32_t addr)
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{
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uint32_t val;
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cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 0);
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return tswap32(val);
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}
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static inline uint32_t softmmu_tget8(CPUState *env, uint32_t addr)
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{
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uint8_t val;
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cpu_memory_rw_debug(env, addr, &val, 1, 0);
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return val;
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}
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#define get_user_u32(arg, p) ({ arg = softmmu_tget32(env, p) ; 0; })
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#define get_user_u8(arg, p) ({ arg = softmmu_tget8(env, p) ; 0; })
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#define get_user_ual(arg, p) get_user_u32(arg, p)
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static inline void softmmu_tput32(CPUState *env, uint32_t addr, uint32_t val)
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{
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val = tswap32(val);
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cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 1);
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}
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#define put_user_u32(arg, p) ({ softmmu_tput32(env, p, arg) ; 0; })
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#define put_user_ual(arg, p) put_user_u32(arg, p)
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static void *softmmu_lock_user(CPUState *env, uint32_t addr, uint32_t len,
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int copy)
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{
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uint8_t *p;
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/* TODO: Make this something that isn't fixed size. */
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p = malloc(len);
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if (copy)
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cpu_memory_rw_debug(env, addr, p, len, 0);
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return p;
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}
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#define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)
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static char *softmmu_lock_user_string(CPUState *env, uint32_t addr)
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{
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char *p;
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char *s;
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uint8_t c;
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/* TODO: Make this something that isn't fixed size. */
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s = p = malloc(1024);
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do {
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cpu_memory_rw_debug(env, addr, &c, 1, 0);
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addr++;
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*(p++) = c;
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} while (c);
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return s;
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}
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#define lock_user_string(p) softmmu_lock_user_string(env, p)
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static void softmmu_unlock_user(CPUState *env, void *p, target_ulong addr,
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target_ulong len)
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{
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if (len)
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cpu_memory_rw_debug(env, addr, p, len, 1);
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free(p);
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}
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#define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)
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