107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
#include <stdint.h>
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "exec/exec-all.h"
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#include "uc_priv.h"
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#include <stdio.h>
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static void raise_mmu_exception(CPUState *cs, target_ulong address,
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int rw, uintptr_t retaddr)
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{
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cs->uc->invalid_error = UC_ERR_EXCEPTION;
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cs->uc->invalid_addr = address;
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cpu_exit(cs->uc->cpu);
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cpu_loop_exit_restore(cs, retaddr);
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}
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static uc_mem_type rw_to_mem_type(int rw)
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{
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switch (rw) {
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case MMU_DATA_LOAD:
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return UC_MEM_READ;
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case MMU_DATA_STORE:
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return UC_MEM_WRITE;
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case MMU_INST_FETCH:
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return UC_MEM_FETCH;
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default:
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return UC_MEM_READ;
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}
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}
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static int perms_to_prot(int perms)
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{
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int ret = 0;
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if (perms & UC_PROT_READ) {
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ret |= PAGE_READ;
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}
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if (perms & UC_PROT_WRITE) {
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ret |= PAGE_WRITE;
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}
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if (perms & UC_PROT_EXEC) {
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ret |= PAGE_EXEC;
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}
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return ret;
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}
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bool unicorn_fill_tlb(CPUState *cs, vaddr address, int size,
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MMUAccessType rw, int mmu_idx,
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bool probe, uintptr_t retaddr)
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{
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bool handled = false;
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bool ret = false;
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struct uc_struct *uc = cs->uc;
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uc_tlb_entry e;
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struct hook *hook;
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HOOK_FOREACH_VAR_DECLARE;
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HOOK_FOREACH(uc, hook, UC_HOOK_TLB_FILL) {
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if (hook->to_delete) {
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continue;
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}
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if (!HOOK_BOUND_CHECK(hook, address)) {
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continue;
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}
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handled = true;
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if ((ret = ((uc_cb_tlbevent_t)hook->callback)(uc, address & TARGET_PAGE_MASK, rw_to_mem_type(rw), &e, hook->user_data))) {
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break;
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}
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}
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if (handled && !ret) {
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goto tlb_miss;
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}
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if (!handled) {
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e.paddr = address & TARGET_PAGE_MASK;
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e.perms = UC_PROT_READ|UC_PROT_WRITE|UC_PROT_EXEC;
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}
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switch (rw) {
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case MMU_DATA_LOAD:
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ret = e.perms & UC_PROT_READ;
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break;
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case MMU_DATA_STORE:
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ret = e.perms & UC_PROT_WRITE;
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break;
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case MMU_INST_FETCH:
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ret = e.perms & UC_PROT_EXEC;
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break;
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default:
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ret = false;
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break;
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}
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if (ret) {
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tlb_set_page(cs, address & TARGET_PAGE_MASK, e.paddr & TARGET_PAGE_MASK, perms_to_prot(e.perms), mmu_idx, TARGET_PAGE_SIZE);
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return true;
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}
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tlb_miss:
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if (probe) {
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return false;
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}
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raise_mmu_exception(cs, address, rw, retaddr);
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return false;
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}
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