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https://github.com/yuzu-emu/unicorn.git
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tcg: Rearrange tb_link_page() to avoid forward declaration
Backports commit e90d96b158665a684ab89b4f002838034b5fafc8 from qemu
This commit is contained in:
Sergey Fedorov
Lioncash
parent
fbc0a1105f
commit
87f2bb42d4
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@ -118,8 +118,6 @@ static intptr_t qemu_real_host_page_mask;
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static uintptr_t qemu_host_page_size;
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static intptr_t qemu_host_page_mask;
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static void tb_link_page(struct uc_struct *uc, TranslationBlock *tb,
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tb_page_addr_t phys_pc, tb_page_addr_t phys_page2);
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static TranslationBlock *tb_find_pc(struct uc_struct *uc, uintptr_t tc_ptr);
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// Unicorn: for cleaning up memory later.
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@ -1161,6 +1159,106 @@ static void build_page_bitmap(PageDesc *p)
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}
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}
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/* add the tb in the target page and protect it if necessary */
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static inline void tb_alloc_page(struct uc_struct *uc, TranslationBlock *tb,
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unsigned int n, tb_page_addr_t page_addr)
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{
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PageDesc *p;
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#ifndef CONFIG_USER_ONLY
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bool page_already_protected;
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#endif
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tb->page_addr[n] = page_addr;
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p = page_find_alloc(uc, page_addr >> TARGET_PAGE_BITS, 1);
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tb->page_next[n] = p->first_tb;
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#ifndef CONFIG_USER_ONLY
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page_already_protected = p->first_tb != NULL;
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#endif
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p->first_tb = (TranslationBlock *)((uintptr_t)tb | n);
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invalidate_page_bitmap(p);
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#if defined(CONFIG_USER_ONLY)
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if (p->flags & PAGE_WRITE) {
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target_ulong addr;
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PageDesc *p2;
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int prot;
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/* force the host page as non writable (writes will have a
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page fault + mprotect overhead) */
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page_addr &= qemu_host_page_mask;
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prot = 0;
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for (addr = page_addr; addr < page_addr + qemu_host_page_size;
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addr += TARGET_PAGE_SIZE) {
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p2 = page_find(addr >> TARGET_PAGE_BITS);
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if (!p2) {
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continue;
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}
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prot |= p2->flags;
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p2->flags &= ~PAGE_WRITE;
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}
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mprotect(g2h(page_addr), qemu_host_page_size,
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(prot & PAGE_BITS) & ~PAGE_WRITE);
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#ifdef DEBUG_TB_INVALIDATE
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printf("protecting code page: 0x" TARGET_FMT_lx "\n",
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page_addr);
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#endif
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}
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#else
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/* if some code is already present, then the pages are already
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protected. So we handle the case where only the first TB is
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allocated in a physical page */
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if (!page_already_protected) {
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tlb_protect_code(uc, page_addr);
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}
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#endif
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}
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/* add a new TB and link it to the physical page tables. phys_page2 is
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(-1) to indicate that only one page contains the TB. */
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static void tb_link_page(struct uc_struct *uc,
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TranslationBlock *tb, tb_page_addr_t phys_pc, tb_page_addr_t phys_page2)
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{
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TCGContext *tcg_ctx = uc->tcg_ctx;
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unsigned int h;
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TranslationBlock **ptb;
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/* Grab the mmap lock to stop another thread invalidating this TB
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before we are done. */
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mmap_lock();
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/* add in the physical hash table */
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h = tb_phys_hash_func(phys_pc);
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ptb = &tcg_ctx->tb_ctx.tb_phys_hash[h];
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tb->phys_hash_next = *ptb;
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*ptb = tb;
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/* add in the page list */
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tb_alloc_page(uc, tb, 0, phys_pc & TARGET_PAGE_MASK);
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if (phys_page2 != -1) {
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tb_alloc_page(uc, tb, 1, phys_page2);
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} else {
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tb->page_addr[1] = -1;
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}
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assert(((uintptr_t)tb & 3) == 0);
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tb->jmp_list_first = (uintptr_t)tb | 2;
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tb->jmp_list_next[0] = (uintptr_t)NULL;
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tb->jmp_list_next[1] = (uintptr_t)NULL;
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/* init original jump addresses */
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if (tb->jmp_reset_offset[0] != TB_JMP_RESET_OFFSET_INVALID) {
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tb_reset_jump(tb, 0);
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}
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if (tb->jmp_reset_offset[1] != TB_JMP_RESET_OFFSET_INVALID) {
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tb_reset_jump(tb, 1);
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}
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#ifdef DEBUG_TB_CHECK
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tb_page_check();
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#endif
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mmap_unlock();
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}
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TranslationBlock *tb_gen_code(CPUState *cpu,
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target_ulong pc, target_ulong cs_base,
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uint32_t flags, int cflags)
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@ -1486,61 +1584,6 @@ static void tb_invalidate_phys_page(struct uc_struct *uc, tb_page_addr_t addr,
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}
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#endif
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/* add the tb in the target page and protect it if necessary */
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static inline void tb_alloc_page(struct uc_struct *uc, TranslationBlock *tb,
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unsigned int n, tb_page_addr_t page_addr)
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{
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PageDesc *p;
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#ifndef CONFIG_USER_ONLY
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bool page_already_protected;
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#endif
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tb->page_addr[n] = page_addr;
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p = page_find_alloc(uc, page_addr >> TARGET_PAGE_BITS, 1);
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tb->page_next[n] = p->first_tb;
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#ifndef CONFIG_USER_ONLY
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page_already_protected = p->first_tb != NULL;
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#endif
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p->first_tb = (TranslationBlock *)((uintptr_t)tb | n);
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invalidate_page_bitmap(p);
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#if defined(CONFIG_USER_ONLY)
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if (p->flags & PAGE_WRITE) {
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target_ulong addr;
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PageDesc *p2;
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int prot;
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/* force the host page as non writable (writes will have a
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page fault + mprotect overhead) */
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page_addr &= qemu_host_page_mask;
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prot = 0;
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for (addr = page_addr; addr < page_addr + qemu_host_page_size;
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addr += TARGET_PAGE_SIZE) {
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p2 = page_find(addr >> TARGET_PAGE_BITS);
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if (!p2) {
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continue;
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}
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prot |= p2->flags;
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p2->flags &= ~PAGE_WRITE;
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}
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mprotect(g2h(page_addr), qemu_host_page_size,
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(prot & PAGE_BITS) & ~PAGE_WRITE);
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#ifdef DEBUG_TB_INVALIDATE
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printf("protecting code page: 0x" TARGET_FMT_lx "\n",
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page_addr);
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#endif
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}
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#else
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/* if some code is already present, then the pages are already
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protected. So we handle the case where only the first TB is
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allocated in a physical page */
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if (!page_already_protected) {
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tlb_protect_code(uc, page_addr);
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}
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#endif
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}
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void tb_invalidate_phys_page_fast(struct uc_struct* uc, tb_page_addr_t start, int len)
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{
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PageDesc *p;
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@ -1578,51 +1621,6 @@ void tb_invalidate_phys_page_fast(struct uc_struct* uc, tb_page_addr_t start, in
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}
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}
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/* add a new TB and link it to the physical page tables. phys_page2 is
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(-1) to indicate that only one page contains the TB. */
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static void tb_link_page(struct uc_struct *uc,
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TranslationBlock *tb, tb_page_addr_t phys_pc, tb_page_addr_t phys_page2)
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{
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TCGContext *tcg_ctx = uc->tcg_ctx;
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unsigned int h;
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TranslationBlock **ptb;
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/* Grab the mmap lock to stop another thread invalidating this TB
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before we are done. */
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mmap_lock();
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/* add in the physical hash table */
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h = tb_phys_hash_func(phys_pc);
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ptb = &tcg_ctx->tb_ctx.tb_phys_hash[h];
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tb->phys_hash_next = *ptb;
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*ptb = tb;
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/* add in the page list */
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tb_alloc_page(uc, tb, 0, phys_pc & TARGET_PAGE_MASK);
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if (phys_page2 != -1) {
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tb_alloc_page(uc, tb, 1, phys_page2);
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} else {
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tb->page_addr[1] = -1;
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}
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assert(((uintptr_t)tb & 3) == 0);
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tb->jmp_list_first = (uintptr_t)tb | 2;
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tb->jmp_list_next[0] = (uintptr_t)NULL;
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tb->jmp_list_next[1] = (uintptr_t)NULL;
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/* init original jump addresses */
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if (tb->jmp_reset_offset[0] != TB_JMP_RESET_OFFSET_INVALID) {
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tb_reset_jump(tb, 0);
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}
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if (tb->jmp_reset_offset[1] != TB_JMP_RESET_OFFSET_INVALID) {
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tb_reset_jump(tb, 1);
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}
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#ifdef DEBUG_TB_CHECK
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tb_page_check();
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#endif
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mmap_unlock();
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}
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/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
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tb[1].tc_ptr. Return NULL if not found */
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static TranslationBlock *tb_find_pc(struct uc_struct *uc, uintptr_t tc_ptr)
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