52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
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/*
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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 licensed under the GPL
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*/
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#include "qemu/osdep.h"
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#include "semihosting/softmmu-uaccess.h"
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void *softmmu_lock_user(CPUArchState *env, target_ulong addr,
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target_ulong len, bool copy)
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{
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void *p = malloc(len);
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if (p && copy) {
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if (cpu_memory_rw_debug(env_cpu(env), addr, p, len, 0)) {
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free(p);
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p = NULL;
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}
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}
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return p;
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}
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char *softmmu_lock_user_string(CPUArchState *env, target_ulong addr)
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{
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/* TODO: Make this something that isn't fixed size. */
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char *s = malloc(1024);
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size_t len = 0;
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if (!s) {
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return NULL;
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}
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do {
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if (cpu_memory_rw_debug(env_cpu(env), addr++, s + len, 1, 0)) {
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free(s);
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return NULL;
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}
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} while (s[len++]);
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return s;
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}
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void softmmu_unlock_user(CPUArchState *env, void *p,
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target_ulong addr, target_ulong len)
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{
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if (len) {
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cpu_memory_rw_debug(env_cpu(env), addr, p, len, 1);
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}
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free(p);
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}
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