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linux-user: Handle tags in lock_user/unlock_user
Resolve the untagged address once, using thread_cpu. Tidy the DEBUG_REMAP code using glib routines. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20210212184902.1251044-20-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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@ -6,36 +6,37 @@
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void *lock_user(int type, abi_ulong guest_addr, size_t len, bool copy)
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{
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void *host_addr;
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guest_addr = cpu_untagged_addr(thread_cpu, guest_addr);
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if (!access_ok_untagged(type, guest_addr, len)) {
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return NULL;
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}
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host_addr = g2h_untagged(guest_addr);
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#ifdef DEBUG_REMAP
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{
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void *addr;
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addr = g_malloc(len);
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if (copy) {
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memcpy(addr, g2h(guest_addr), len);
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} else {
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memset(addr, 0, len);
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}
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return addr;
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if (copy) {
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host_addr = g_memdup(host_addr, len);
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} else {
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host_addr = g_malloc0(len);
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}
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#else
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return g2h_untagged(guest_addr);
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#endif
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return host_addr;
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}
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#ifdef DEBUG_REMAP
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void unlock_user(void *host_ptr, abi_ulong guest_addr, size_t len);
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{
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void *host_ptr_conv;
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if (!host_ptr) {
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return;
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}
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if (host_ptr == g2h_untagged(guest_addr)) {
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host_ptr_conv = g2h(thread_cpu, guest_addr);
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if (host_ptr == host_ptr_conv) {
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return;
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}
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if (len != 0) {
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memcpy(g2h_untagged(guest_addr), host_ptr, len);
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memcpy(host_ptr_conv, host_ptr, len);
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}
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g_free(host_ptr);
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}
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