static inline void gen_intermediate_code_internal(UniCore32CPU *cpu, TranslationBlock *tb, bool search_pc) { CPUState *cs = CPU(cpu); CPUUniCore32State *env = &cpu->env; DisasContext dc1, *dc = &dc1; CPUBreakpoint *bp; uint16_t *gen_opc_end; int j, lj; target_ulong pc_start; uint32_t next_page_start; int num_insns; int max_insns; /* generate intermediate code */ num_temps = 0; pc_start = tb->pc; dc->tb = tb; gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE; dc->is_jmp = DISAS_NEXT; dc->pc = pc_start; dc->singlestep_enabled = cs->singlestep_enabled; dc->condjmp = 0; cpu_F0s = tcg_temp_new_i32(); cpu_F1s = tcg_temp_new_i32(); cpu_F0d = tcg_temp_new_i64(); cpu_F1d = tcg_temp_new_i64(); next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; lj = -1; num_insns = 0; max_insns = tb->cflags & CF_COUNT_MASK; if (max_insns == 0) { max_insns = CF_COUNT_MASK; } #ifndef CONFIG_USER_ONLY if ((env->uncached_asr & ASR_M) == ASR_MODE_USER) { dc->user = 1; } else { dc->user = 0; } #endif gen_tb_start(); do { if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) { QTAILQ_FOREACH(bp, &cs->breakpoints, entry) { if (bp->pc == dc->pc) { gen_set_pc_im(dc->pc); gen_exception(EXCP_DEBUG); dc->is_jmp = DISAS_JUMP; /* Advance PC so that clearing the breakpoint will invalidate this TB. */ dc->pc += 2; /* FIXME */ goto done_generating; } } } if (search_pc) { j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; if (lj < j) { lj++; while (lj < j) { tcg_ctx.gen_opc_instr_start[lj++] = 0; } } tcg_ctx.gen_opc_pc[lj] = dc->pc; tcg_ctx.gen_opc_instr_start[lj] = 1; tcg_ctx.gen_opc_icount[lj] = num_insns; } if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) { gen_io_start(); } disas_uc32_insn(env, dc); if (num_temps) { fprintf(stderr, "Internal resource leak before %08x\n", dc->pc); num_temps = 0; } if (dc->condjmp && !dc->is_jmp) { gen_set_label(dc->condlabel); dc->condjmp = 0; } /* Translation stops when a conditional branch is encountered. * Otherwise the subsequent code could get translated several times. * Also stop translation when a page boundary is reached. This * ensures prefetch aborts occur at the right place. */ num_insns++; } while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end && !cs->singlestep_enabled && !singlestep && dc->pc < next_page_start && num_insns < max_insns); if (tb->cflags & CF_LAST_IO) { if (dc->condjmp) { /* FIXME: This can theoretically happen with self-modifying code. */ cpu_abort(cs, "IO on conditional branch instruction"); } gen_io_end(); } /* At this stage dc->condjmp will only be set when the skipped instruction was a conditional branch or trap, and the PC has already been written. */ if (unlikely(cs->singlestep_enabled)) { /* Make sure the pc is updated, and raise a debug exception. */ if (dc->condjmp) { if (dc->is_jmp == DISAS_SYSCALL) { gen_exception(UC32_EXCP_PRIV); } else { gen_exception(EXCP_DEBUG); } gen_set_label(dc->condlabel); } if (dc->condjmp || !dc->is_jmp) { gen_set_pc_im(dc->pc); dc->condjmp = 0; } if (dc->is_jmp == DISAS_SYSCALL && !dc->condjmp) { gen_exception(UC32_EXCP_PRIV); } else { gen_exception(EXCP_DEBUG); } } else { /* While branches must always occur at the end of an IT block, there are a few other things that can cause us to terminate the TB in the middel of an IT block: - Exception generating instructions (bkpt, swi, undefined). - Page boundaries. - Hardware watchpoints. Hardware breakpoints have already been handled and skip this code. */ switch (dc->is_jmp) { case DISAS_NEXT: gen_goto_tb(dc, 1, dc->pc); break; default: case DISAS_JUMP: case DISAS_UPDATE: /* indicate that the hash table must be used to find the next TB */ tcg_gen_exit_tb(0); break; case DISAS_TB_JUMP: /* nothing more to generate */ break; case DISAS_SYSCALL: gen_exception(UC32_EXCP_PRIV); break; } if (dc->condjmp) { gen_set_label(dc->condlabel); gen_goto_tb(dc, 1, dc->pc); dc->condjmp = 0; } } done_generating: gen_tb_end(tb, num_insns); *tcg_ctx.gen_opc_ptr = INDEX_op_end; #ifdef DEBUG_DISAS if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) { qemu_log("----------------\n"); qemu_log("IN: %s\n", lookup_symbol(pc_start)); log_target_disas(env, pc_start, dc->pc - pc_start, 0); qemu_log("\n"); } #endif if (search_pc) { j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; lj++; while (lj <= j) { tcg_ctx.gen_opc_instr_start[lj++] = 0; } } else { tb->size = dc->pc - pc_start; tb->icount = num_insns; } }