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/*
* Helper routines to provide target memory access for semihosting
* syscalls in system emulation mode.
*
* Copyright (c) 2007 CodeSourcery.
*
* This code is licensed under the GPL
*/
#include "qemu/osdep.h"
#include "semihosting/softmmu-uaccess.h"
void *softmmu_lock_user(CPUArchState *env, target_ulong addr,
target_ulong len, bool copy)
{
void *p = malloc(len);
if (p && copy) {
if (cpu_memory_rw_debug(env_cpu(env), addr, p, len, 0)) {
free(p);
p = NULL;
}
}
return p;
}
char *softmmu_lock_user_string(CPUArchState *env, target_ulong addr)
{
/* TODO: Make this something that isn't fixed size. */
char *s = malloc(1024);
size_t len = 0;
if (!s) {
return NULL;
}
do {
if (cpu_memory_rw_debug(env_cpu(env), addr++, s + len, 1, 0)) {
free(s);
return NULL;
}
} while (s[len++]);
return s;
}
void softmmu_unlock_user(CPUArchState *env, void *p,
target_ulong addr, target_ulong len)
{
if (len) {
cpu_memory_rw_debug(env_cpu(env), addr, p, len, 1);
}
free(p);
}
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