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8ce5c64499
We were reporting unconditional success for these functions; pass on any failure from cpu_memory_rw_debug. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
88 lines
3 KiB
C
88 lines
3 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 licensed under the GPL
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*/
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#ifndef SEMIHOSTING_SOFTMMU_UACCESS_H
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#define SEMIHOSTING_SOFTMMU_UACCESS_H
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#include "cpu.h"
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#define get_user_u64(val, addr) \
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({ uint64_t val_ = 0; \
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int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr), \
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&val_, sizeof(val_), 0); \
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(val) = tswap64(val_); ret_; })
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#define get_user_u32(val, addr) \
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({ uint32_t val_ = 0; \
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int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr), \
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&val_, sizeof(val_), 0); \
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(val) = tswap32(val_); ret_; })
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#define get_user_u8(val, addr) \
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({ uint8_t val_ = 0; \
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int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr), \
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&val_, sizeof(val_), 0); \
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(val) = val_; ret_; })
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#define get_user_ual(arg, p) get_user_u32(arg, p)
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#define put_user_u64(val, addr) \
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({ uint64_t val_ = tswap64(val); \
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cpu_memory_rw_debug(env_cpu(env), (addr), &val_, sizeof(val_), 1); })
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#define put_user_u32(val, addr) \
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({ uint32_t val_ = tswap32(val); \
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cpu_memory_rw_debug(env_cpu(env), (addr), &val_, sizeof(val_), 1); })
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#define put_user_ual(arg, p) put_user_u32(arg, p)
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static 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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#define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)
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static 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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#define lock_user_string(p) softmmu_lock_user_string(env, p)
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static void softmmu_unlock_user(CPUArchState *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_cpu(env), addr, p, len, 1);
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}
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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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#endif /* SEMIHOSTING_SOFTMMU_UACCESS_H */
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