diff options
| -rw-r--r-- | accel/tcg/translator.c | 55 | ||||
| -rw-r--r-- | include/exec/translator.h | 23 |
2 files changed, 78 insertions, 0 deletions
diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c index aa9f36aaa0..01e1f0977b 100644 --- a/accel/tcg/translator.c +++ b/accel/tcg/translator.c @@ -354,6 +354,61 @@ static void record_save(DisasContextBase *db, vaddr pc, memcpy(db->record + (offset - db->record_start), from, size); } +size_t translator_st_len(const DisasContextBase *db) +{ + return db->fake_insn ? db->record_len : db->tb->size; +} + +bool translator_st(const DisasContextBase *db, void *dest, + vaddr addr, size_t len) +{ + size_t offset, offset_end; + + if (addr < db->pc_first) { + return false; + } + offset = addr - db->pc_first; + offset_end = offset + len; + if (offset_end > translator_st_len(db)) { + return false; + } + + if (!db->fake_insn) { + size_t offset_page1 = -(db->pc_first | TARGET_PAGE_MASK); + + /* Get all the bytes from the first page. */ + if (db->host_addr[0]) { + if (offset_end <= offset_page1) { + memcpy(dest, db->host_addr[0] + offset, len); + return true; + } + if (offset < offset_page1) { + size_t len0 = offset_page1 - offset; + memcpy(dest, db->host_addr[0] + offset, len0); + offset += len0; + dest += len0; + } + } + + /* Get any bytes from the second page. */ + if (db->host_addr[1] && offset >= offset_page1) { + memcpy(dest, db->host_addr[1] + (offset - offset_page1), + offset_end - offset); + return true; + } + } + + /* Else get recorded bytes. */ + if (db->record_len != 0 && + offset >= db->record_start && + offset_end <= db->record_start + db->record_len) { + memcpy(dest, db->record + (offset - db->record_start), + offset_end - offset); + return true; + } + return false; +} + static void plugin_insn_append(vaddr pc, const void *from, size_t size) { #ifdef CONFIG_PLUGIN diff --git a/include/exec/translator.h b/include/exec/translator.h index 70cef2c0be..fff857a0cc 100644 --- a/include/exec/translator.h +++ b/include/exec/translator.h @@ -246,6 +246,29 @@ translator_ldq_swap(CPUArchState *env, DisasContextBase *db, */ void translator_fake_ldb(DisasContextBase *db, vaddr pc, uint8_t insn8); +/** + * translator_st + * @db: disassembly context + * @dest: address to copy into + * @addr: virtual address within TB + * @len: length + * + * Copy @len bytes from @addr into @dest. + * All bytes must have been read during translation. + * Return true on success or false on failure. + */ +bool translator_st(const DisasContextBase *db, void *dest, + vaddr addr, size_t len); + +/** + * translator_st_len + * @db: disassembly context + * + * Return the number of bytes available to copy from the + * current translation block with translator_st. + */ +size_t translator_st_len(const DisasContextBase *db); + #ifdef COMPILING_PER_TARGET /* * Return whether addr is on the same page as where disassembly started. |