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/*
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* AArch64 translation
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*
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* Copyright (c) 2013 Alexander Graf <agraf@suse.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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|
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#include "cpu.h" |
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#include "tcg-op.h" |
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#include "qemu/log.h" |
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#include "translate.h" |
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#include "qemu/host-utils.h" |
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|
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#include "exec/gen-icount.h" |
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#include "helper.h" |
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#define GEN_HELPER 1 |
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#include "helper.h" |
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static TCGv_i64 cpu_X[32]; |
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static TCGv_i64 cpu_pc;
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static TCGv_i32 pstate;
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|
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static const char *regnames[] = { |
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"x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", |
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"x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", |
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"x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", |
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"x24", "x25", "x26", "x27", "x28", "x29", "lr", "sp" |
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}; |
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|
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/* initialize TCG globals. */
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void a64_translate_init(void) |
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{
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int i;
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|
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cpu_pc = tcg_global_mem_new_i64(TCG_AREG0, |
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offsetof(CPUARMState, pc), |
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"pc");
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for (i = 0; i < 32; i++) { |
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cpu_X[i] = tcg_global_mem_new_i64(TCG_AREG0, |
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offsetof(CPUARMState, xregs[i]), |
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regnames[i]); |
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} |
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pstate = tcg_global_mem_new_i32(TCG_AREG0, |
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offsetof(CPUARMState, pstate), |
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"pstate");
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} |
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void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
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fprintf_function cpu_fprintf, int flags)
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{
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ARMCPU *cpu = ARM_CPU(cs); |
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CPUARMState *env = &cpu->env; |
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uint32_t psr = pstate_read(env); |
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int i;
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|
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cpu_fprintf(f, "PC=%016"PRIx64" SP=%016"PRIx64"\n", |
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env->pc, env->xregs[31]);
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for (i = 0; i < 31; i++) { |
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cpu_fprintf(f, "X%02d=%016"PRIx64, i, env->xregs[i]);
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if ((i % 4) == 3) { |
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cpu_fprintf(f, "\n");
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} else {
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cpu_fprintf(f, " ");
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} |
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} |
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cpu_fprintf(f, "PSTATE=%08x (flags %c%c%c%c)\n",
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psr, |
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psr & PSTATE_N ? 'N' : '-', |
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psr & PSTATE_Z ? 'Z' : '-', |
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psr & PSTATE_C ? 'C' : '-', |
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psr & PSTATE_V ? 'V' : '-'); |
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cpu_fprintf(f, "\n");
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} |
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|
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void gen_a64_set_pc_im(uint64_t val)
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{
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tcg_gen_movi_i64(cpu_pc, val); |
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} |
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|
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static void gen_exception(int excp) |
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{
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TCGv_i32 tmp = tcg_temp_new_i32(); |
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tcg_gen_movi_i32(tmp, excp); |
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gen_helper_exception(cpu_env, tmp); |
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tcg_temp_free_i32(tmp); |
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} |
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static void gen_exception_insn(DisasContext *s, int offset, int excp) |
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{
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gen_a64_set_pc_im(s->pc - offset); |
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gen_exception(excp); |
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s->is_jmp = DISAS_EXC; |
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} |
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static inline bool use_goto_tb(DisasContext *s, int n, uint64_t dest) |
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{
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/* No direct tb linking with singlestep or deterministic io */
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if (s->singlestep_enabled || (s->tb->cflags & CF_LAST_IO)) {
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return false; |
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} |
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/* Only link tbs from inside the same guest page */
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if ((s->tb->pc & TARGET_PAGE_MASK) != (dest & TARGET_PAGE_MASK)) {
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return false; |
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} |
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return true; |
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} |
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static inline void gen_goto_tb(DisasContext *s, int n, uint64_t dest) |
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{
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TranslationBlock *tb; |
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tb = s->tb; |
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if (use_goto_tb(s, n, dest)) {
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tcg_gen_goto_tb(n); |
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gen_a64_set_pc_im(dest); |
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tcg_gen_exit_tb((tcg_target_long)tb + n); |
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s->is_jmp = DISAS_TB_JUMP; |
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} else {
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gen_a64_set_pc_im(dest); |
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if (s->singlestep_enabled) {
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gen_exception(EXCP_DEBUG); |
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} |
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tcg_gen_exit_tb(0);
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s->is_jmp = DISAS_JUMP; |
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} |
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} |
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static void unallocated_encoding(DisasContext *s) |
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{
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gen_exception_insn(s, 4, EXCP_UDEF);
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} |
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#define unsupported_encoding(s, insn) \
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do { \
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qemu_log_mask(LOG_UNIMP, \ |
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"%s:%d: unsupported instruction encoding 0x%08x " \
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"at pc=%016" PRIx64 "\n", \ |
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__FILE__, __LINE__, insn, s->pc - 4); \
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unallocated_encoding(s); \ |
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} while (0); |
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static void init_tmp_a64_array(DisasContext *s) |
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{
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#ifdef CONFIG_DEBUG_TCG
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int i;
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for (i = 0; i < ARRAY_SIZE(s->tmp_a64); i++) { |
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TCGV_UNUSED_I64(s->tmp_a64[i]); |
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} |
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#endif
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s->tmp_a64_count = 0;
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} |
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|
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static void free_tmp_a64(DisasContext *s) |
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{
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int i;
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for (i = 0; i < s->tmp_a64_count; i++) { |
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tcg_temp_free_i64(s->tmp_a64[i]); |
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} |
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init_tmp_a64_array(s); |
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} |
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static TCGv_i64 new_tmp_a64(DisasContext *s)
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{
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assert(s->tmp_a64_count < TMP_A64_MAX); |
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return s->tmp_a64[s->tmp_a64_count++] = tcg_temp_new_i64();
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} |
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static TCGv_i64 new_tmp_a64_zero(DisasContext *s)
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{
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TCGv_i64 t = new_tmp_a64(s); |
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tcg_gen_movi_i64(t, 0);
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return t;
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} |
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static TCGv_i64 cpu_reg(DisasContext *s, int reg) |
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{
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if (reg == 31) { |
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return new_tmp_a64_zero(s);
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} else {
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return cpu_X[reg];
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} |
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} |
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/* read a cpu register in 32bit/64bit mode. Returns a TCGv_i64
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* representing the register contents. This TCGv is an auto-freed
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* temporary so it need not be explicitly freed, and may be modified.
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*/
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static TCGv_i64 read_cpu_reg(DisasContext *s, int reg, int sf) |
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{
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TCGv_i64 v = new_tmp_a64(s); |
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if (reg != 31) { |
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if (sf) {
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tcg_gen_mov_i64(v, cpu_X[reg]); |
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} else {
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tcg_gen_ext32u_i64(v, cpu_X[reg]); |
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} |
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} else {
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tcg_gen_movi_i64(v, 0);
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} |
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return v;
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} |
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|
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/*
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* the instruction disassembly implemented here matches
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* the instruction encoding classifications in chapter 3 (C3)
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* of the ARM Architecture Reference Manual (DDI0487A_a)
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*/
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/* C3.2.7 Unconditional branch (immediate)
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* 31 30 26 25 0
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* +----+-----------+-------------------------------------+
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* | op | 0 0 1 0 1 | imm26 |
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* +----+-----------+-------------------------------------+
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*/
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static void disas_uncond_b_imm(DisasContext *s, uint32_t insn) |
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{
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uint64_t addr = s->pc + sextract32(insn, 0, 26) * 4 - 4; |
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|
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if (insn & (1 << 31)) { |
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/* C5.6.26 BL Branch with link */
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tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
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} |
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/* C5.6.20 B Branch / C5.6.26 BL Branch with link */
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gen_goto_tb(s, 0, addr);
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} |
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/* C3.2.1 Compare & branch (immediate)
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* 31 30 25 24 23 5 4 0
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* +----+-------------+----+---------------------+--------+
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* | sf | 0 1 1 0 1 0 | op | imm19 | Rt |
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* +----+-------------+----+---------------------+--------+
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*/
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static void disas_comp_b_imm(DisasContext *s, uint32_t insn) |
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{
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unsigned int sf, op, rt; |
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uint64_t addr; |
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int label_match;
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TCGv_i64 tcg_cmp; |
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sf = extract32(insn, 31, 1); |
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op = extract32(insn, 24, 1); /* 0: CBZ; 1: CBNZ */ |
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rt = extract32(insn, 0, 5); |
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addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; |
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tcg_cmp = read_cpu_reg(s, rt, sf); |
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label_match = gen_new_label(); |
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tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, |
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tcg_cmp, 0, label_match);
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|
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gen_goto_tb(s, 0, s->pc);
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gen_set_label(label_match); |
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gen_goto_tb(s, 1, addr);
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} |
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|
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/* C3.2.5 Test & branch (immediate)
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* 31 30 25 24 23 19 18 5 4 0
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* +----+-------------+----+-------+-------------+------+
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* | b5 | 0 1 1 0 1 1 | op | b40 | imm14 | Rt |
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* +----+-------------+----+-------+-------------+------+
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*/
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static void disas_test_b_imm(DisasContext *s, uint32_t insn) |
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{
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unsigned int bit_pos, op, rt; |
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uint64_t addr; |
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int label_match;
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TCGv_i64 tcg_cmp; |
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bit_pos = (extract32(insn, 31, 1) << 5) | extract32(insn, 19, 5); |
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op = extract32(insn, 24, 1); /* 0: TBZ; 1: TBNZ */ |
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addr = s->pc + sextract32(insn, 5, 14) * 4 - 4; |
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rt = extract32(insn, 0, 5); |
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tcg_cmp = tcg_temp_new_i64(); |
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tcg_gen_andi_i64(tcg_cmp, cpu_reg(s, rt), (1ULL << bit_pos));
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label_match = gen_new_label(); |
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tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, |
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tcg_cmp, 0, label_match);
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tcg_temp_free_i64(tcg_cmp); |
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gen_goto_tb(s, 0, s->pc);
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gen_set_label(label_match); |
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gen_goto_tb(s, 1, addr);
|
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} |
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|
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/* C3.2.2 / C5.6.19 Conditional branch (immediate)
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* 31 25 24 23 5 4 3 0
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* +---------------+----+---------------------+----+------+
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* | 0 1 0 1 0 1 0 | o1 | imm19 | o0 | cond |
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* +---------------+----+---------------------+----+------+
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*/
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static void disas_cond_b_imm(DisasContext *s, uint32_t insn) |
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{
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unsigned int cond; |
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uint64_t addr; |
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|
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if ((insn & (1 << 4)) || (insn & (1 << 24))) { |
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unallocated_encoding(s); |
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return;
|
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} |
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addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; |
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cond = extract32(insn, 0, 4); |
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|
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if (cond < 0x0e) { |
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/* genuinely conditional branches */
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int label_match = gen_new_label();
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arm_gen_test_cc(cond, label_match); |
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gen_goto_tb(s, 0, s->pc);
|
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gen_set_label(label_match); |
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gen_goto_tb(s, 1, addr);
|
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} else {
|
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/* 0xe and 0xf are both "always" conditions */
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gen_goto_tb(s, 0, addr);
|
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} |
| 336 |
} |
| 337 |
|
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/* C5.6.68 HINT */
|
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static void handle_hint(DisasContext *s, uint32_t insn, |
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unsigned int op1, unsigned int op2, unsigned int crm) |
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{
|
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unsigned int selector = crm << 3 | op2; |
| 343 |
|
| 344 |
if (op1 != 3) { |
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unallocated_encoding(s); |
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return;
|
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} |
| 348 |
|
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switch (selector) {
|
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case 0: /* NOP */ |
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return;
|
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case 1: /* YIELD */ |
| 353 |
case 2: /* WFE */ |
| 354 |
case 3: /* WFI */ |
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case 4: /* SEV */ |
| 356 |
case 5: /* SEVL */ |
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/* we treat all as NOP at least for now */
|
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return;
|
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default:
|
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/* default specified as NOP equivalent */
|
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return;
|
| 362 |
} |
| 363 |
} |
| 364 |
|
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/* CLREX, DSB, DMB, ISB */
|
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static void handle_sync(DisasContext *s, uint32_t insn, |
| 367 |
unsigned int op1, unsigned int op2, unsigned int crm) |
| 368 |
{
|
| 369 |
if (op1 != 3) { |
| 370 |
unallocated_encoding(s); |
| 371 |
return;
|
| 372 |
} |
| 373 |
|
| 374 |
switch (op2) {
|
| 375 |
case 2: /* CLREX */ |
| 376 |
unsupported_encoding(s, insn); |
| 377 |
return;
|
| 378 |
case 4: /* DSB */ |
| 379 |
case 5: /* DMB */ |
| 380 |
case 6: /* ISB */ |
| 381 |
/* We don't emulate caches so barriers are no-ops */
|
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return;
|
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default:
|
| 384 |
unallocated_encoding(s); |
| 385 |
return;
|
| 386 |
} |
| 387 |
} |
| 388 |
|
| 389 |
/* C5.6.130 MSR (immediate) - move immediate to processor state field */
|
| 390 |
static void handle_msr_i(DisasContext *s, uint32_t insn, |
| 391 |
unsigned int op1, unsigned int op2, unsigned int crm) |
| 392 |
{
|
| 393 |
unsupported_encoding(s, insn); |
| 394 |
} |
| 395 |
|
| 396 |
/* C5.6.204 SYS */
|
| 397 |
static void handle_sys(DisasContext *s, uint32_t insn, unsigned int l, |
| 398 |
unsigned int op1, unsigned int op2, |
| 399 |
unsigned int crn, unsigned int crm, unsigned int rt) |
| 400 |
{
|
| 401 |
unsupported_encoding(s, insn); |
| 402 |
} |
| 403 |
|
| 404 |
/* C5.6.129 MRS - move from system register */
|
| 405 |
static void handle_mrs(DisasContext *s, uint32_t insn, unsigned int op0, |
| 406 |
unsigned int op1, unsigned int op2, |
| 407 |
unsigned int crn, unsigned int crm, unsigned int rt) |
| 408 |
{
|
| 409 |
unsupported_encoding(s, insn); |
| 410 |
} |
| 411 |
|
| 412 |
/* C5.6.131 MSR (register) - move to system register */
|
| 413 |
static void handle_msr(DisasContext *s, uint32_t insn, unsigned int op0, |
| 414 |
unsigned int op1, unsigned int op2, |
| 415 |
unsigned int crn, unsigned int crm, unsigned int rt) |
| 416 |
{
|
| 417 |
unsupported_encoding(s, insn); |
| 418 |
} |
| 419 |
|
| 420 |
/* C3.2.4 System
|
| 421 |
* 31 22 21 20 19 18 16 15 12 11 8 7 5 4 0
|
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* +---------------------+---+-----+-----+-------+-------+-----+------+
|
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* | 1 1 0 1 0 1 0 1 0 0 | L | op0 | op1 | CRn | CRm | op2 | Rt |
|
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* +---------------------+---+-----+-----+-------+-------+-----+------+
|
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*/
|
| 426 |
static void disas_system(DisasContext *s, uint32_t insn) |
| 427 |
{
|
| 428 |
unsigned int l, op0, op1, crn, crm, op2, rt; |
| 429 |
l = extract32(insn, 21, 1); |
| 430 |
op0 = extract32(insn, 19, 2); |
| 431 |
op1 = extract32(insn, 16, 3); |
| 432 |
crn = extract32(insn, 12, 4); |
| 433 |
crm = extract32(insn, 8, 4); |
| 434 |
op2 = extract32(insn, 5, 3); |
| 435 |
rt = extract32(insn, 0, 5); |
| 436 |
|
| 437 |
if (op0 == 0) { |
| 438 |
if (l || rt != 31) { |
| 439 |
unallocated_encoding(s); |
| 440 |
return;
|
| 441 |
} |
| 442 |
switch (crn) {
|
| 443 |
case 2: /* C5.6.68 HINT */ |
| 444 |
handle_hint(s, insn, op1, op2, crm); |
| 445 |
break;
|
| 446 |
case 3: /* CLREX, DSB, DMB, ISB */ |
| 447 |
handle_sync(s, insn, op1, op2, crm); |
| 448 |
break;
|
| 449 |
case 4: /* C5.6.130 MSR (immediate) */ |
| 450 |
handle_msr_i(s, insn, op1, op2, crm); |
| 451 |
break;
|
| 452 |
default:
|
| 453 |
unallocated_encoding(s); |
| 454 |
break;
|
| 455 |
} |
| 456 |
return;
|
| 457 |
} |
| 458 |
|
| 459 |
if (op0 == 1) { |
| 460 |
/* C5.6.204 SYS */
|
| 461 |
handle_sys(s, insn, l, op1, op2, crn, crm, rt); |
| 462 |
} else if (l) { /* op0 > 1 */ |
| 463 |
/* C5.6.129 MRS - move from system register */
|
| 464 |
handle_mrs(s, insn, op0, op1, op2, crn, crm, rt); |
| 465 |
} else {
|
| 466 |
/* C5.6.131 MSR (register) - move to system register */
|
| 467 |
handle_msr(s, insn, op0, op1, op2, crn, crm, rt); |
| 468 |
} |
| 469 |
} |
| 470 |
|
| 471 |
/* Exception generation */
|
| 472 |
static void disas_exc(DisasContext *s, uint32_t insn) |
| 473 |
{
|
| 474 |
unsupported_encoding(s, insn); |
| 475 |
} |
| 476 |
|
| 477 |
/* C3.2.7 Unconditional branch (register)
|
| 478 |
* 31 25 24 21 20 16 15 10 9 5 4 0
|
| 479 |
* +---------------+-------+-------+-------+------+-------+
|
| 480 |
* | 1 1 0 1 0 1 1 | opc | op2 | op3 | Rn | op4 |
|
| 481 |
* +---------------+-------+-------+-------+------+-------+
|
| 482 |
*/
|
| 483 |
static void disas_uncond_b_reg(DisasContext *s, uint32_t insn) |
| 484 |
{
|
| 485 |
unsigned int opc, op2, op3, rn, op4; |
| 486 |
|
| 487 |
opc = extract32(insn, 21, 4); |
| 488 |
op2 = extract32(insn, 16, 5); |
| 489 |
op3 = extract32(insn, 10, 6); |
| 490 |
rn = extract32(insn, 5, 5); |
| 491 |
op4 = extract32(insn, 0, 5); |
| 492 |
|
| 493 |
if (op4 != 0x0 || op3 != 0x0 || op2 != 0x1f) { |
| 494 |
unallocated_encoding(s); |
| 495 |
return;
|
| 496 |
} |
| 497 |
|
| 498 |
switch (opc) {
|
| 499 |
case 0: /* BR */ |
| 500 |
case 2: /* RET */ |
| 501 |
break;
|
| 502 |
case 1: /* BLR */ |
| 503 |
tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
|
| 504 |
break;
|
| 505 |
case 4: /* ERET */ |
| 506 |
case 5: /* DRPS */ |
| 507 |
if (rn != 0x1f) { |
| 508 |
unallocated_encoding(s); |
| 509 |
} else {
|
| 510 |
unsupported_encoding(s, insn); |
| 511 |
} |
| 512 |
return;
|
| 513 |
default:
|
| 514 |
unallocated_encoding(s); |
| 515 |
return;
|
| 516 |
} |
| 517 |
|
| 518 |
tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn)); |
| 519 |
s->is_jmp = DISAS_JUMP; |
| 520 |
} |
| 521 |
|
| 522 |
/* C3.2 Branches, exception generating and system instructions */
|
| 523 |
static void disas_b_exc_sys(DisasContext *s, uint32_t insn) |
| 524 |
{
|
| 525 |
switch (extract32(insn, 25, 7)) { |
| 526 |
case 0x0a: case 0x0b: |
| 527 |
case 0x4a: case 0x4b: /* Unconditional branch (immediate) */ |
| 528 |
disas_uncond_b_imm(s, insn); |
| 529 |
break;
|
| 530 |
case 0x1a: case 0x5a: /* Compare & branch (immediate) */ |
| 531 |
disas_comp_b_imm(s, insn); |
| 532 |
break;
|
| 533 |
case 0x1b: case 0x5b: /* Test & branch (immediate) */ |
| 534 |
disas_test_b_imm(s, insn); |
| 535 |
break;
|
| 536 |
case 0x2a: /* Conditional branch (immediate) */ |
| 537 |
disas_cond_b_imm(s, insn); |
| 538 |
break;
|
| 539 |
case 0x6a: /* Exception generation / System */ |
| 540 |
if (insn & (1 << 24)) { |
| 541 |
disas_system(s, insn); |
| 542 |
} else {
|
| 543 |
disas_exc(s, insn); |
| 544 |
} |
| 545 |
break;
|
| 546 |
case 0x6b: /* Unconditional branch (register) */ |
| 547 |
disas_uncond_b_reg(s, insn); |
| 548 |
break;
|
| 549 |
default:
|
| 550 |
unallocated_encoding(s); |
| 551 |
break;
|
| 552 |
} |
| 553 |
} |
| 554 |
|
| 555 |
/* Load/store exclusive */
|
| 556 |
static void disas_ldst_excl(DisasContext *s, uint32_t insn) |
| 557 |
{
|
| 558 |
unsupported_encoding(s, insn); |
| 559 |
} |
| 560 |
|
| 561 |
/* Load register (literal) */
|
| 562 |
static void disas_ld_lit(DisasContext *s, uint32_t insn) |
| 563 |
{
|
| 564 |
unsupported_encoding(s, insn); |
| 565 |
} |
| 566 |
|
| 567 |
/* Load/store pair (all forms) */
|
| 568 |
static void disas_ldst_pair(DisasContext *s, uint32_t insn) |
| 569 |
{
|
| 570 |
unsupported_encoding(s, insn); |
| 571 |
} |
| 572 |
|
| 573 |
/* Load/store register (all forms) */
|
| 574 |
static void disas_ldst_reg(DisasContext *s, uint32_t insn) |
| 575 |
{
|
| 576 |
unsupported_encoding(s, insn); |
| 577 |
} |
| 578 |
|
| 579 |
/* AdvSIMD load/store multiple structures */
|
| 580 |
static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn) |
| 581 |
{
|
| 582 |
unsupported_encoding(s, insn); |
| 583 |
} |
| 584 |
|
| 585 |
/* AdvSIMD load/store single structure */
|
| 586 |
static void disas_ldst_single_struct(DisasContext *s, uint32_t insn) |
| 587 |
{
|
| 588 |
unsupported_encoding(s, insn); |
| 589 |
} |
| 590 |
|
| 591 |
/* C3.3 Loads and stores */
|
| 592 |
static void disas_ldst(DisasContext *s, uint32_t insn) |
| 593 |
{
|
| 594 |
switch (extract32(insn, 24, 6)) { |
| 595 |
case 0x08: /* Load/store exclusive */ |
| 596 |
disas_ldst_excl(s, insn); |
| 597 |
break;
|
| 598 |
case 0x18: case 0x1c: /* Load register (literal) */ |
| 599 |
disas_ld_lit(s, insn); |
| 600 |
break;
|
| 601 |
case 0x28: case 0x29: |
| 602 |
case 0x2c: case 0x2d: /* Load/store pair (all forms) */ |
| 603 |
disas_ldst_pair(s, insn); |
| 604 |
break;
|
| 605 |
case 0x38: case 0x39: |
| 606 |
case 0x3c: case 0x3d: /* Load/store register (all forms) */ |
| 607 |
disas_ldst_reg(s, insn); |
| 608 |
break;
|
| 609 |
case 0x0c: /* AdvSIMD load/store multiple structures */ |
| 610 |
disas_ldst_multiple_struct(s, insn); |
| 611 |
break;
|
| 612 |
case 0x0d: /* AdvSIMD load/store single structure */ |
| 613 |
disas_ldst_single_struct(s, insn); |
| 614 |
break;
|
| 615 |
default:
|
| 616 |
unallocated_encoding(s); |
| 617 |
break;
|
| 618 |
} |
| 619 |
} |
| 620 |
|
| 621 |
/* PC-rel. addressing */
|
| 622 |
static void disas_pc_rel_adr(DisasContext *s, uint32_t insn) |
| 623 |
{
|
| 624 |
unsupported_encoding(s, insn); |
| 625 |
} |
| 626 |
|
| 627 |
/* Add/subtract (immediate) */
|
| 628 |
static void disas_add_sub_imm(DisasContext *s, uint32_t insn) |
| 629 |
{
|
| 630 |
unsupported_encoding(s, insn); |
| 631 |
} |
| 632 |
|
| 633 |
/* Logical (immediate) */
|
| 634 |
static void disas_logic_imm(DisasContext *s, uint32_t insn) |
| 635 |
{
|
| 636 |
unsupported_encoding(s, insn); |
| 637 |
} |
| 638 |
|
| 639 |
/* Move wide (immediate) */
|
| 640 |
static void disas_movw_imm(DisasContext *s, uint32_t insn) |
| 641 |
{
|
| 642 |
unsupported_encoding(s, insn); |
| 643 |
} |
| 644 |
|
| 645 |
/* Bitfield */
|
| 646 |
static void disas_bitfield(DisasContext *s, uint32_t insn) |
| 647 |
{
|
| 648 |
unsupported_encoding(s, insn); |
| 649 |
} |
| 650 |
|
| 651 |
/* Extract */
|
| 652 |
static void disas_extract(DisasContext *s, uint32_t insn) |
| 653 |
{
|
| 654 |
unsupported_encoding(s, insn); |
| 655 |
} |
| 656 |
|
| 657 |
/* C3.4 Data processing - immediate */
|
| 658 |
static void disas_data_proc_imm(DisasContext *s, uint32_t insn) |
| 659 |
{
|
| 660 |
switch (extract32(insn, 23, 6)) { |
| 661 |
case 0x20: case 0x21: /* PC-rel. addressing */ |
| 662 |
disas_pc_rel_adr(s, insn); |
| 663 |
break;
|
| 664 |
case 0x22: case 0x23: /* Add/subtract (immediate) */ |
| 665 |
disas_add_sub_imm(s, insn); |
| 666 |
break;
|
| 667 |
case 0x24: /* Logical (immediate) */ |
| 668 |
disas_logic_imm(s, insn); |
| 669 |
break;
|
| 670 |
case 0x25: /* Move wide (immediate) */ |
| 671 |
disas_movw_imm(s, insn); |
| 672 |
break;
|
| 673 |
case 0x26: /* Bitfield */ |
| 674 |
disas_bitfield(s, insn); |
| 675 |
break;
|
| 676 |
case 0x27: /* Extract */ |
| 677 |
disas_extract(s, insn); |
| 678 |
break;
|
| 679 |
default:
|
| 680 |
unallocated_encoding(s); |
| 681 |
break;
|
| 682 |
} |
| 683 |
} |
| 684 |
|
| 685 |
/* Logical (shifted register) */
|
| 686 |
static void disas_logic_reg(DisasContext *s, uint32_t insn) |
| 687 |
{
|
| 688 |
unsupported_encoding(s, insn); |
| 689 |
} |
| 690 |
|
| 691 |
/* Add/subtract (extended register) */
|
| 692 |
static void disas_add_sub_ext_reg(DisasContext *s, uint32_t insn) |
| 693 |
{
|
| 694 |
unsupported_encoding(s, insn); |
| 695 |
} |
| 696 |
|
| 697 |
/* Add/subtract (shifted register) */
|
| 698 |
static void disas_add_sub_reg(DisasContext *s, uint32_t insn) |
| 699 |
{
|
| 700 |
unsupported_encoding(s, insn); |
| 701 |
} |
| 702 |
|
| 703 |
/* Data-processing (3 source) */
|
| 704 |
static void disas_data_proc_3src(DisasContext *s, uint32_t insn) |
| 705 |
{
|
| 706 |
unsupported_encoding(s, insn); |
| 707 |
} |
| 708 |
|
| 709 |
/* Add/subtract (with carry) */
|
| 710 |
static void disas_adc_sbc(DisasContext *s, uint32_t insn) |
| 711 |
{
|
| 712 |
unsupported_encoding(s, insn); |
| 713 |
} |
| 714 |
|
| 715 |
/* Conditional compare (immediate) */
|
| 716 |
static void disas_cc_imm(DisasContext *s, uint32_t insn) |
| 717 |
{
|
| 718 |
unsupported_encoding(s, insn); |
| 719 |
} |
| 720 |
|
| 721 |
/* Conditional compare (register) */
|
| 722 |
static void disas_cc_reg(DisasContext *s, uint32_t insn) |
| 723 |
{
|
| 724 |
unsupported_encoding(s, insn); |
| 725 |
} |
| 726 |
|
| 727 |
/* C3.5.6 Conditional select
|
| 728 |
* 31 30 29 28 21 20 16 15 12 11 10 9 5 4 0
|
| 729 |
* +----+----+---+-----------------+------+------+-----+------+------+
|
| 730 |
* | sf | op | S | 1 1 0 1 0 1 0 0 | Rm | cond | op2 | Rn | Rd |
|
| 731 |
* +----+----+---+-----------------+------+------+-----+------+------+
|
| 732 |
*/
|
| 733 |
static void disas_cond_select(DisasContext *s, uint32_t insn) |
| 734 |
{
|
| 735 |
unsigned int sf, else_inv, rm, cond, else_inc, rn, rd; |
| 736 |
TCGv_i64 tcg_rd, tcg_src; |
| 737 |
|
| 738 |
if (extract32(insn, 29, 1) || extract32(insn, 11, 1)) { |
| 739 |
/* S == 1 or op2<1> == 1 */
|
| 740 |
unallocated_encoding(s); |
| 741 |
return;
|
| 742 |
} |
| 743 |
sf = extract32(insn, 31, 1); |
| 744 |
else_inv = extract32(insn, 30, 1); |
| 745 |
rm = extract32(insn, 16, 5); |
| 746 |
cond = extract32(insn, 12, 4); |
| 747 |
else_inc = extract32(insn, 10, 1); |
| 748 |
rn = extract32(insn, 5, 5); |
| 749 |
rd = extract32(insn, 0, 5); |
| 750 |
|
| 751 |
if (rd == 31) { |
| 752 |
/* silly no-op write; until we use movcond we must special-case
|
| 753 |
* this to avoid a dead temporary across basic blocks.
|
| 754 |
*/
|
| 755 |
return;
|
| 756 |
} |
| 757 |
|
| 758 |
tcg_rd = cpu_reg(s, rd); |
| 759 |
|
| 760 |
if (cond >= 0x0e) { /* condition "always" */ |
| 761 |
tcg_src = read_cpu_reg(s, rn, sf); |
| 762 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
| 763 |
} else {
|
| 764 |
/* OPTME: we could use movcond here, at the cost of duplicating
|
| 765 |
* a lot of the arm_gen_test_cc() logic.
|
| 766 |
*/
|
| 767 |
int label_match = gen_new_label();
|
| 768 |
int label_continue = gen_new_label();
|
| 769 |
|
| 770 |
arm_gen_test_cc(cond, label_match); |
| 771 |
/* nomatch: */
|
| 772 |
tcg_src = cpu_reg(s, rm); |
| 773 |
|
| 774 |
if (else_inv && else_inc) {
|
| 775 |
tcg_gen_neg_i64(tcg_rd, tcg_src); |
| 776 |
} else if (else_inv) { |
| 777 |
tcg_gen_not_i64(tcg_rd, tcg_src); |
| 778 |
} else if (else_inc) { |
| 779 |
tcg_gen_addi_i64(tcg_rd, tcg_src, 1);
|
| 780 |
} else {
|
| 781 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
| 782 |
} |
| 783 |
if (!sf) {
|
| 784 |
tcg_gen_ext32u_i64(tcg_rd, tcg_rd); |
| 785 |
} |
| 786 |
tcg_gen_br(label_continue); |
| 787 |
/* match: */
|
| 788 |
gen_set_label(label_match); |
| 789 |
tcg_src = read_cpu_reg(s, rn, sf); |
| 790 |
tcg_gen_mov_i64(tcg_rd, tcg_src); |
| 791 |
/* continue: */
|
| 792 |
gen_set_label(label_continue); |
| 793 |
} |
| 794 |
} |
| 795 |
|
| 796 |
/* Data-processing (1 source) */
|
| 797 |
static void disas_data_proc_1src(DisasContext *s, uint32_t insn) |
| 798 |
{
|
| 799 |
unsupported_encoding(s, insn); |
| 800 |
} |
| 801 |
|
| 802 |
/* Data-processing (2 source) */
|
| 803 |
static void disas_data_proc_2src(DisasContext *s, uint32_t insn) |
| 804 |
{
|
| 805 |
unsupported_encoding(s, insn); |
| 806 |
} |
| 807 |
|
| 808 |
/* C3.5 Data processing - register */
|
| 809 |
static void disas_data_proc_reg(DisasContext *s, uint32_t insn) |
| 810 |
{
|
| 811 |
switch (extract32(insn, 24, 5)) { |
| 812 |
case 0x0a: /* Logical (shifted register) */ |
| 813 |
disas_logic_reg(s, insn); |
| 814 |
break;
|
| 815 |
case 0x0b: /* Add/subtract */ |
| 816 |
if (insn & (1 << 21)) { /* (extended register) */ |
| 817 |
disas_add_sub_ext_reg(s, insn); |
| 818 |
} else {
|
| 819 |
disas_add_sub_reg(s, insn); |
| 820 |
} |
| 821 |
break;
|
| 822 |
case 0x1b: /* Data-processing (3 source) */ |
| 823 |
disas_data_proc_3src(s, insn); |
| 824 |
break;
|
| 825 |
case 0x1a: |
| 826 |
switch (extract32(insn, 21, 3)) { |
| 827 |
case 0x0: /* Add/subtract (with carry) */ |
| 828 |
disas_adc_sbc(s, insn); |
| 829 |
break;
|
| 830 |
case 0x2: /* Conditional compare */ |
| 831 |
if (insn & (1 << 11)) { /* (immediate) */ |
| 832 |
disas_cc_imm(s, insn); |
| 833 |
} else { /* (register) */ |
| 834 |
disas_cc_reg(s, insn); |
| 835 |
} |
| 836 |
break;
|
| 837 |
case 0x4: /* Conditional select */ |
| 838 |
disas_cond_select(s, insn); |
| 839 |
break;
|
| 840 |
case 0x6: /* Data-processing */ |
| 841 |
if (insn & (1 << 30)) { /* (1 source) */ |
| 842 |
disas_data_proc_1src(s, insn); |
| 843 |
} else { /* (2 source) */ |
| 844 |
disas_data_proc_2src(s, insn); |
| 845 |
} |
| 846 |
break;
|
| 847 |
default:
|
| 848 |
unallocated_encoding(s); |
| 849 |
break;
|
| 850 |
} |
| 851 |
break;
|
| 852 |
default:
|
| 853 |
unallocated_encoding(s); |
| 854 |
break;
|
| 855 |
} |
| 856 |
} |
| 857 |
|
| 858 |
/* C3.6 Data processing - SIMD and floating point */
|
| 859 |
static void disas_data_proc_simd_fp(DisasContext *s, uint32_t insn) |
| 860 |
{
|
| 861 |
unsupported_encoding(s, insn); |
| 862 |
} |
| 863 |
|
| 864 |
/* C3.1 A64 instruction index by encoding */
|
| 865 |
static void disas_a64_insn(CPUARMState *env, DisasContext *s) |
| 866 |
{
|
| 867 |
uint32_t insn; |
| 868 |
|
| 869 |
insn = arm_ldl_code(env, s->pc, s->bswap_code); |
| 870 |
s->insn = insn; |
| 871 |
s->pc += 4;
|
| 872 |
|
| 873 |
switch (extract32(insn, 25, 4)) { |
| 874 |
case 0x0: case 0x1: case 0x2: case 0x3: /* UNALLOCATED */ |
| 875 |
unallocated_encoding(s); |
| 876 |
break;
|
| 877 |
case 0x8: case 0x9: /* Data processing - immediate */ |
| 878 |
disas_data_proc_imm(s, insn); |
| 879 |
break;
|
| 880 |
case 0xa: case 0xb: /* Branch, exception generation and system insns */ |
| 881 |
disas_b_exc_sys(s, insn); |
| 882 |
break;
|
| 883 |
case 0x4: |
| 884 |
case 0x6: |
| 885 |
case 0xc: |
| 886 |
case 0xe: /* Loads and stores */ |
| 887 |
disas_ldst(s, insn); |
| 888 |
break;
|
| 889 |
case 0x5: |
| 890 |
case 0xd: /* Data processing - register */ |
| 891 |
disas_data_proc_reg(s, insn); |
| 892 |
break;
|
| 893 |
case 0x7: |
| 894 |
case 0xf: /* Data processing - SIMD and floating point */ |
| 895 |
disas_data_proc_simd_fp(s, insn); |
| 896 |
break;
|
| 897 |
default:
|
| 898 |
assert(FALSE); /* all 15 cases should be handled above */
|
| 899 |
break;
|
| 900 |
} |
| 901 |
|
| 902 |
/* if we allocated any temporaries, free them here */
|
| 903 |
free_tmp_a64(s); |
| 904 |
} |
| 905 |
|
| 906 |
void gen_intermediate_code_internal_a64(ARMCPU *cpu,
|
| 907 |
TranslationBlock *tb, |
| 908 |
bool search_pc)
|
| 909 |
{
|
| 910 |
CPUState *cs = CPU(cpu); |
| 911 |
CPUARMState *env = &cpu->env; |
| 912 |
DisasContext dc1, *dc = &dc1; |
| 913 |
CPUBreakpoint *bp; |
| 914 |
uint16_t *gen_opc_end; |
| 915 |
int j, lj;
|
| 916 |
target_ulong pc_start; |
| 917 |
target_ulong next_page_start; |
| 918 |
int num_insns;
|
| 919 |
int max_insns;
|
| 920 |
|
| 921 |
pc_start = tb->pc; |
| 922 |
|
| 923 |
dc->tb = tb; |
| 924 |
|
| 925 |
gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE; |
| 926 |
|
| 927 |
dc->is_jmp = DISAS_NEXT; |
| 928 |
dc->pc = pc_start; |
| 929 |
dc->singlestep_enabled = cs->singlestep_enabled; |
| 930 |
dc->condjmp = 0;
|
| 931 |
|
| 932 |
dc->aarch64 = 1;
|
| 933 |
dc->thumb = 0;
|
| 934 |
dc->bswap_code = 0;
|
| 935 |
dc->condexec_mask = 0;
|
| 936 |
dc->condexec_cond = 0;
|
| 937 |
#if !defined(CONFIG_USER_ONLY)
|
| 938 |
dc->user = 0;
|
| 939 |
#endif
|
| 940 |
dc->vfp_enabled = 0;
|
| 941 |
dc->vec_len = 0;
|
| 942 |
dc->vec_stride = 0;
|
| 943 |
|
| 944 |
init_tmp_a64_array(dc); |
| 945 |
|
| 946 |
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; |
| 947 |
lj = -1;
|
| 948 |
num_insns = 0;
|
| 949 |
max_insns = tb->cflags & CF_COUNT_MASK; |
| 950 |
if (max_insns == 0) { |
| 951 |
max_insns = CF_COUNT_MASK; |
| 952 |
} |
| 953 |
|
| 954 |
gen_tb_start(); |
| 955 |
|
| 956 |
tcg_clear_temp_count(); |
| 957 |
|
| 958 |
do {
|
| 959 |
if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
|
| 960 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
|
| 961 |
if (bp->pc == dc->pc) {
|
| 962 |
gen_exception_insn(dc, 0, EXCP_DEBUG);
|
| 963 |
/* Advance PC so that clearing the breakpoint will
|
| 964 |
invalidate this TB. */
|
| 965 |
dc->pc += 2;
|
| 966 |
goto done_generating;
|
| 967 |
} |
| 968 |
} |
| 969 |
} |
| 970 |
|
| 971 |
if (search_pc) {
|
| 972 |
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; |
| 973 |
if (lj < j) {
|
| 974 |
lj++; |
| 975 |
while (lj < j) {
|
| 976 |
tcg_ctx.gen_opc_instr_start[lj++] = 0;
|
| 977 |
} |
| 978 |
} |
| 979 |
tcg_ctx.gen_opc_pc[lj] = dc->pc; |
| 980 |
tcg_ctx.gen_opc_instr_start[lj] = 1;
|
| 981 |
tcg_ctx.gen_opc_icount[lj] = num_insns; |
| 982 |
} |
| 983 |
|
| 984 |
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) { |
| 985 |
gen_io_start(); |
| 986 |
} |
| 987 |
|
| 988 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
|
| 989 |
tcg_gen_debug_insn_start(dc->pc); |
| 990 |
} |
| 991 |
|
| 992 |
disas_a64_insn(env, dc); |
| 993 |
|
| 994 |
if (tcg_check_temp_count()) {
|
| 995 |
fprintf(stderr, "TCG temporary leak before "TARGET_FMT_lx"\n", |
| 996 |
dc->pc); |
| 997 |
} |
| 998 |
|
| 999 |
/* Translation stops when a conditional branch is encountered.
|
| 1000 |
* Otherwise the subsequent code could get translated several times.
|
| 1001 |
* Also stop translation when a page boundary is reached. This
|
| 1002 |
* ensures prefetch aborts occur at the right place.
|
| 1003 |
*/
|
| 1004 |
num_insns++; |
| 1005 |
} while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end &&
|
| 1006 |
!cs->singlestep_enabled && |
| 1007 |
!singlestep && |
| 1008 |
dc->pc < next_page_start && |
| 1009 |
num_insns < max_insns); |
| 1010 |
|
| 1011 |
if (tb->cflags & CF_LAST_IO) {
|
| 1012 |
gen_io_end(); |
| 1013 |
} |
| 1014 |
|
| 1015 |
if (unlikely(cs->singlestep_enabled) && dc->is_jmp != DISAS_EXC) {
|
| 1016 |
/* Note that this means single stepping WFI doesn't halt the CPU.
|
| 1017 |
* For conditional branch insns this is harmless unreachable code as
|
| 1018 |
* gen_goto_tb() has already handled emitting the debug exception
|
| 1019 |
* (and thus a tb-jump is not possible when singlestepping).
|
| 1020 |
*/
|
| 1021 |
assert(dc->is_jmp != DISAS_TB_JUMP); |
| 1022 |
if (dc->is_jmp != DISAS_JUMP) {
|
| 1023 |
gen_a64_set_pc_im(dc->pc); |
| 1024 |
} |
| 1025 |
gen_exception(EXCP_DEBUG); |
| 1026 |
} else {
|
| 1027 |
switch (dc->is_jmp) {
|
| 1028 |
case DISAS_NEXT:
|
| 1029 |
gen_goto_tb(dc, 1, dc->pc);
|
| 1030 |
break;
|
| 1031 |
default:
|
| 1032 |
case DISAS_JUMP:
|
| 1033 |
case DISAS_UPDATE:
|
| 1034 |
/* indicate that the hash table must be used to find the next TB */
|
| 1035 |
tcg_gen_exit_tb(0);
|
| 1036 |
break;
|
| 1037 |
case DISAS_TB_JUMP:
|
| 1038 |
case DISAS_EXC:
|
| 1039 |
case DISAS_SWI:
|
| 1040 |
break;
|
| 1041 |
case DISAS_WFI:
|
| 1042 |
/* This is a special case because we don't want to just halt the CPU
|
| 1043 |
* if trying to debug across a WFI.
|
| 1044 |
*/
|
| 1045 |
gen_helper_wfi(cpu_env); |
| 1046 |
break;
|
| 1047 |
} |
| 1048 |
} |
| 1049 |
|
| 1050 |
done_generating:
|
| 1051 |
gen_tb_end(tb, num_insns); |
| 1052 |
*tcg_ctx.gen_opc_ptr = INDEX_op_end; |
| 1053 |
|
| 1054 |
#ifdef DEBUG_DISAS
|
| 1055 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
| 1056 |
qemu_log("----------------\n");
|
| 1057 |
qemu_log("IN: %s\n", lookup_symbol(pc_start));
|
| 1058 |
log_target_disas(env, pc_start, dc->pc - pc_start, |
| 1059 |
dc->thumb | (dc->bswap_code << 1));
|
| 1060 |
qemu_log("\n");
|
| 1061 |
} |
| 1062 |
#endif
|
| 1063 |
if (search_pc) {
|
| 1064 |
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; |
| 1065 |
lj++; |
| 1066 |
while (lj <= j) {
|
| 1067 |
tcg_ctx.gen_opc_instr_start[lj++] = 0;
|
| 1068 |
} |
| 1069 |
} else {
|
| 1070 |
tb->size = dc->pc - pc_start; |
| 1071 |
tb->icount = num_insns; |
| 1072 |
} |
| 1073 |
} |