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cpu: Move cpu_copy() into linux-user 

It is only used there and is deemed very fragile if not incorrect in its
current memcpy() form. Moving it into linux-user will allow to move
parts into target_cpu.h headers and only copy what the ABI mandates.

Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Andreas Färber 2013-07-02 17:43:21 +02:00
parent 812586405c
commit 30ba0ee52d
2 changed files with 31 additions and 32 deletions
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32
exec.c
View File

@ -625,38 +625,6 @@ void cpu_abort(CPUArchState *env, const char *fmt, ...)
abort();
}
CPUArchState *cpu_copy(CPUArchState *env)
{
CPUArchState *new_env = cpu_init(env->cpu_model_str);
#if defined(TARGET_HAS_ICE)
CPUBreakpoint *bp;
CPUWatchpoint *wp;
#endif
/* Reset non arch specific state */
cpu_reset(ENV_GET_CPU(new_env));
/* Copy arch specific state into the new CPU */
memcpy(new_env, env, sizeof(CPUArchState));
/* Clone all break/watchpoints.
Note: Once we support ptrace with hw-debug register access, make sure
BP_CPU break/watchpoints are handled correctly on clone. */
QTAILQ_INIT(&env->breakpoints);
QTAILQ_INIT(&env->watchpoints);
#if defined(TARGET_HAS_ICE)
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL);
}
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1,
wp->flags, NULL);
}
#endif
return new_env;
}
#if !defined(CONFIG_USER_ONLY)
static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t end,
uintptr_t length)

31
linux-user/main.c
View File

@ -3285,6 +3285,37 @@ void init_task_state(TaskState *ts)
ts->sigqueue_table[i].next = NULL;
}
CPUArchState *cpu_copy(CPUArchState *env)
{
CPUArchState *new_env = cpu_init(env->cpu_model_str);
#if defined(TARGET_HAS_ICE)
CPUBreakpoint *bp;
CPUWatchpoint *wp;
#endif
/* Reset non arch specific state */
cpu_reset(ENV_GET_CPU(new_env));
memcpy(new_env, env, sizeof(CPUArchState));
/* Clone all break/watchpoints.
Note: Once we support ptrace with hw-debug register access, make sure
BP_CPU break/watchpoints are handled correctly on clone. */
QTAILQ_INIT(&env->breakpoints);
QTAILQ_INIT(&env->watchpoints);
#if defined(TARGET_HAS_ICE)
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL);
}
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1,
wp->flags, NULL);
}
#endif
return new_env;
}
static void handle_arg_help(const char *arg)
{
usage();