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Basic implementation of uc_ctl

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lazymio
2021-11-01 00:39:36 +01:00
parent b07baede63
commit 3dd2e0f95d
19 changed files with 459 additions and 52 deletions
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36
qemu/softmmu/cpus.c
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@@ -171,10 +171,28 @@ void cpu_stop_current(struct uc_struct *uc)
}
}
// Unicorn: Why addr - 1?
// 0: INC ecx
// 1: DEC edx <--- We put exit here, then the range of TB is [0, 1)
//
// While tb_invalidate_phys_range invalides [start, end)
//
// This function is designed to used with g_tree_foreach
static inline gboolean uc_exit_invalidate_iter(gpointer key, gpointer val, gpointer data) {
uint64_t exit = *((uint64_t*)key);
uc_engine* uc = (uc_engine*)data;
if (exit != 0) {
uc->uc_invalidate_tb(uc, exit - 1, 1);
}
return false;
}
void resume_all_vcpus(struct uc_struct* uc)
{
CPUState *cpu = uc->cpu;
tb_page_addr_t start, end;
cpu->halted = 0;
cpu->exit_request = 0;
cpu->exception_index = -1;
@@ -187,23 +205,11 @@ void resume_all_vcpus(struct uc_struct* uc)
}
}
// clear the cache of the addr_end address, since the generated code
// clear the cache of the exits address, since the generated code
// at that address is to exit emulation, but not for the instruction there.
// if we dont do this, next time we cannot emulate at that address
if (uc->addr_end != 0) {
// GVA to GPA (GPA -> HVA via page_find, HVA->HPA via host mmu)
end = get_page_addr_code(uc->cpu->env_ptr, uc->addr_end);
// For 32bit target.
start = (end - 1) & (target_ulong)(-1);
end = end & (target_ulong)(-1);
// Unicorn: Why start - 1?
// 0: INC ecx
// 1: DEC edx <--- We put exit here, then the range of TB is [0, 1)
//
// While tb_invalidate_phys_range invalides [start, end)
tb_invalidate_phys_range(uc, start, end);
}
g_tree_foreach(uc->exits, uc_exit_invalidate_iter, (void*)uc);
cpu->created = false;
}