52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
|
|
* 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);
|
|
}
|