/* * ARM translation * * Copyright (c) 2003 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include "cpu.h" #include "exec-all.h" #include "disas.h" /* internal defines */ typedef struct DisasContext { uint8_t *pc; int is_jmp; struct TranslationBlock *tb; } DisasContext; #define DISAS_JUMP_NEXT 4 /* XXX: move that elsewhere */ static uint16_t *gen_opc_ptr; static uint32_t *gen_opparam_ptr; extern FILE *logfile; extern int loglevel; enum { #define DEF(s, n, copy_size) INDEX_op_ ## s, #include "opc.h" #undef DEF NB_OPS, }; #include "gen-op.h" static GenOpFunc2 *gen_test_cc[14] = { gen_op_test_eq, gen_op_test_ne, gen_op_test_cs, gen_op_test_cc, gen_op_test_mi, gen_op_test_pl, gen_op_test_vs, gen_op_test_vc, gen_op_test_hi, gen_op_test_ls, gen_op_test_ge, gen_op_test_lt, gen_op_test_gt, gen_op_test_le, }; const uint8_t table_logic_cc[16] = { 1, /* and */ 1, /* xor */ 0, /* sub */ 0, /* rsb */ 0, /* add */ 0, /* adc */ 0, /* sbc */ 0, /* rsc */ 1, /* andl */ 1, /* xorl */ 0, /* cmp */ 0, /* cmn */ 1, /* orr */ 1, /* mov */ 1, /* bic */ 1, /* mvn */ }; static GenOpFunc1 *gen_shift_T1_im[4] = { gen_op_shll_T1_im, gen_op_shrl_T1_im, gen_op_sarl_T1_im, gen_op_rorl_T1_im, }; static GenOpFunc1 *gen_shift_T2_im[4] = { gen_op_shll_T2_im, gen_op_shrl_T2_im, gen_op_sarl_T2_im, gen_op_rorl_T2_im, }; static GenOpFunc1 *gen_shift_T1_im_cc[4] = { gen_op_shll_T1_im_cc, gen_op_shrl_T1_im_cc, gen_op_sarl_T1_im_cc, gen_op_rorl_T1_im_cc, }; static GenOpFunc *gen_shift_T1_T0[4] = { gen_op_shll_T1_T0, gen_op_shrl_T1_T0, gen_op_sarl_T1_T0, gen_op_rorl_T1_T0, }; static GenOpFunc *gen_shift_T1_T0_cc[4] = { gen_op_shll_T1_T0_cc, gen_op_shrl_T1_T0_cc, gen_op_sarl_T1_T0_cc, gen_op_rorl_T1_T0_cc, }; static GenOpFunc *gen_op_movl_TN_reg[3][16] = { { gen_op_movl_T0_r0, gen_op_movl_T0_r1, gen_op_movl_T0_r2, gen_op_movl_T0_r3, gen_op_movl_T0_r4, gen_op_movl_T0_r5, gen_op_movl_T0_r6, gen_op_movl_T0_r7, gen_op_movl_T0_r8, gen_op_movl_T0_r9, gen_op_movl_T0_r10, gen_op_movl_T0_r11, gen_op_movl_T0_r12, gen_op_movl_T0_r13, gen_op_movl_T0_r14, gen_op_movl_T0_r15, }, { gen_op_movl_T1_r0, gen_op_movl_T1_r1, gen_op_movl_T1_r2, gen_op_movl_T1_r3, gen_op_movl_T1_r4, gen_op_movl_T1_r5, gen_op_movl_T1_r6, gen_op_movl_T1_r7, gen_op_movl_T1_r8, gen_op_movl_T1_r9, gen_op_movl_T1_r10, gen_op_movl_T1_r11, gen_op_movl_T1_r12, gen_op_movl_T1_r13, gen_op_movl_T1_r14, gen_op_movl_T1_r15, }, { gen_op_movl_T2_r0, gen_op_movl_T2_r1, gen_op_movl_T2_r2, gen_op_movl_T2_r3, gen_op_movl_T2_r4, gen_op_movl_T2_r5, gen_op_movl_T2_r6, gen_op_movl_T2_r7, gen_op_movl_T2_r8, gen_op_movl_T2_r9, gen_op_movl_T2_r10, gen_op_movl_T2_r11, gen_op_movl_T2_r12, gen_op_movl_T2_r13, gen_op_movl_T2_r14, gen_op_movl_T2_r15, }, }; static GenOpFunc *gen_op_movl_reg_TN[2][16] = { { gen_op_movl_r0_T0, gen_op_movl_r1_T0, gen_op_movl_r2_T0, gen_op_movl_r3_T0, gen_op_movl_r4_T0, gen_op_movl_r5_T0, gen_op_movl_r6_T0, gen_op_movl_r7_T0, gen_op_movl_r8_T0, gen_op_movl_r9_T0, gen_op_movl_r10_T0, gen_op_movl_r11_T0, gen_op_movl_r12_T0, gen_op_movl_r13_T0, gen_op_movl_r14_T0, gen_op_movl_r15_T0, }, { gen_op_movl_r0_T1, gen_op_movl_r1_T1, gen_op_movl_r2_T1, gen_op_movl_r3_T1, gen_op_movl_r4_T1, gen_op_movl_r5_T1, gen_op_movl_r6_T1, gen_op_movl_r7_T1, gen_op_movl_r8_T1, gen_op_movl_r9_T1, gen_op_movl_r10_T1, gen_op_movl_r11_T1, gen_op_movl_r12_T1, gen_op_movl_r13_T1, gen_op_movl_r14_T1, gen_op_movl_r15_T1, }, }; static GenOpFunc1 *gen_op_movl_TN_im[3] = { gen_op_movl_T0_im, gen_op_movl_T1_im, gen_op_movl_T2_im, }; static inline void gen_movl_TN_reg(DisasContext *s, int reg, int t) { int val; if (reg == 15) { /* normaly, since we updated PC, we need only to add 4 */ val = (long)s->pc + 4; gen_op_movl_TN_im[t](val); } else { gen_op_movl_TN_reg[t][reg](); } } static inline void gen_movl_T0_reg(DisasContext *s, int reg) { gen_movl_TN_reg(s, reg, 0); } static inline void gen_movl_T1_reg(DisasContext *s, int reg) { gen_movl_TN_reg(s, reg, 1); } static inline void gen_movl_T2_reg(DisasContext *s, int reg) { gen_movl_TN_reg(s, reg, 2); } static inline void gen_movl_reg_TN(DisasContext *s, int reg, int t) { gen_op_movl_reg_TN[t][reg](); if (reg == 15) { s->is_jmp = DISAS_JUMP; } } static inline void gen_movl_reg_T0(DisasContext *s, int reg) { gen_movl_reg_TN(s, reg, 0); } static inline void gen_movl_reg_T1(DisasContext *s, int reg) { gen_movl_reg_TN(s, reg, 1); } static inline void gen_add_data_offset(DisasContext *s, unsigned int insn) { int val, rm, shift; if (!(insn & (1 << 25))) { /* immediate */ val = insn & 0xfff; if (!(insn & (1 << 23))) val = -val; gen_op_addl_T1_im(val); } else { /* shift/register */ rm = (insn) & 0xf; shift = (insn >> 7) & 0x1f; gen_movl_T2_reg(s, rm); if (shift != 0) { gen_shift_T2_im[(insn >> 5) & 3](shift); } if (!(insn & (1 << 23))) gen_op_subl_T1_T2(); else gen_op_addl_T1_T2(); } } static inline void gen_add_datah_offset(DisasContext *s, unsigned int insn) { int val, rm; if (insn & (1 << 22)) { /* immediate */ val = (insn & 0xf) | ((insn >> 4) & 0xf0); if (!(insn & (1 << 23))) val = -val; gen_op_addl_T1_im(val); } else { /* register */ rm = (insn) & 0xf; gen_movl_T2_reg(s, rm); if (!(insn & (1 << 23))) gen_op_subl_T1_T2(); else gen_op_addl_T1_T2(); } } static void disas_arm_insn(DisasContext *s) { unsigned int cond, insn, val, op1, i, shift, rm, rs, rn, rd, sh; insn = ldl(s->pc); s->pc += 4; cond = insn >> 28; if (cond == 0xf) goto illegal_op; if (cond != 0xe) { /* if not always execute, we generate a conditional jump to next instruction */ gen_test_cc[cond ^ 1]((long)s->tb, (long)s->pc); s->is_jmp = DISAS_JUMP_NEXT; } if (((insn & 0x0e000000) == 0 && (insn & 0x00000090) != 0x90) || ((insn & 0x0e000000) == (1 << 25))) { int set_cc, logic_cc, shiftop; op1 = (insn >> 21) & 0xf; set_cc = (insn >> 20) & 1; logic_cc = table_logic_cc[op1] & set_cc; /* data processing instruction */ if (insn & (1 << 25)) { /* immediate operand */ val = insn & 0xff; shift = ((insn >> 8) & 0xf) * 2; if (shift) val = (val >> shift) | (val << (32 - shift)); gen_op_movl_T1_im(val); /* XXX: is CF modified ? */ } else { /* register */ rm = (insn) & 0xf; gen_movl_T1_reg(s, rm); shiftop = (insn >> 5) & 3; if (!(insn & (1 << 4))) { shift = (insn >> 7) & 0x1f; if (shift != 0) { if (logic_cc) { gen_shift_T1_im_cc[shiftop](shift); } else { gen_shift_T1_im[shiftop](shift); } } } else { rs = (insn >> 8) & 0xf; gen_movl_T0_reg(s, rs); if (logic_cc) { gen_shift_T1_T0_cc[shiftop](); } else { gen_shift_T1_T0[shiftop](); } } } if (op1 != 0x0f && op1 != 0x0d) { rn = (insn >> 16) & 0xf; gen_movl_T0_reg(s, rn); } rd = (insn >> 12) & 0xf; switch(op1) { case 0x00: gen_op_andl_T0_T1(); gen_movl_reg_T0(s, rd); if (logic_cc) gen_op_logic_T0_cc(); break; case 0x01: gen_op_xorl_T0_T1(); gen_movl_reg_T0(s, rd); if (logic_cc) gen_op_logic_T0_cc(); break; case 0x02: if (set_cc) gen_op_subl_T0_T1_cc(); else gen_op_subl_T0_T1(); gen_movl_reg_T0(s, rd); break; case 0x03: if (set_cc) gen_op_rsbl_T0_T1_cc(); else gen_op_rsbl_T0_T1(); gen_movl_reg_T0(s, rd); break; case 0x04: if (set_cc) gen_op_addl_T0_T1_cc(); else gen_op_addl_T0_T1(); gen_movl_reg_T0(s, rd); break; case 0x05: if (set_cc) gen_op_adcl_T0_T1_cc(); else gen_op_adcl_T0_T1(); gen_movl_reg_T0(s, rd); break; case 0x06: if (set_cc) gen_op_sbcl_T0_T1_cc(); else gen_op_sbcl_T0_T1(); gen_movl_reg_T0(s, rd); break; case 0x07: if (set_cc) gen_op_rscl_T0_T1_cc(); else gen_op_rscl_T0_T1(); gen_movl_reg_T0(s, rd); break; case 0x08: if (set_cc) { gen_op_andl_T0_T1(); gen_op_logic_T0_cc(); } break; case 0x09: if (set_cc) { gen_op_xorl_T0_T1(); gen_op_logic_T0_cc(); } break; case 0x0a: if (set_cc) { gen_op_subl_T0_T1_cc(); } break; case 0x0b: if (set_cc) { gen_op_addl_T0_T1_cc(); } break; case 0x0c: gen_op_orl_T0_T1(); gen_movl_reg_T0(s, rd); if (logic_cc) gen_op_logic_T0_cc(); break; case 0x0d: gen_movl_reg_T1(s, rd); if (logic_cc) gen_op_logic_T1_cc(); break; case 0x0e: gen_op_bicl_T0_T1(); gen_movl_reg_T0(s, rd); if (logic_cc) gen_op_logic_T0_cc(); break; default: case 0x0f: gen_op_notl_T1(); gen_movl_reg_T1(s, rd); if (logic_cc) gen_op_logic_T1_cc(); break; } } else { /* other instructions */ op1 = (insn >> 24) & 0xf; switch(op1) { case 0x0: case 0x1: sh = (insn >> 5) & 3; if (sh == 0) { if (op1 == 0x0) { rd = (insn >> 16) & 0xf; rn = (insn >> 12) & 0xf; rs = (insn >> 8) & 0xf; rm = (insn) & 0xf; if (!(insn & (1 << 23))) { /* 32 bit mul */ gen_movl_T0_reg(s, rs); gen_movl_T1_reg(s, rm); gen_op_mul_T0_T1(); if (insn & (1 << 21)) { gen_movl_T1_reg(s, rn); gen_op_addl_T0_T1(); } if (insn & (1 << 20)) gen_op_logic_T0_cc(); gen_movl_reg_T0(s, rd); } else { /* 64 bit mul */ gen_movl_T0_reg(s, rs); gen_movl_T1_reg(s, rm); if (insn & (1 << 22)) gen_op_imull_T0_T1(); else gen_op_mull_T0_T1(); if (insn & (1 << 21)) gen_op_addq_T0_T1(rn, rd); if (insn & (1 << 20)) gen_op_logicq_cc(); gen_movl_reg_T0(s, rn); gen_movl_reg_T1(s, rd); } } else { /* SWP instruction */ rn = (insn >> 16) & 0xf; rd = (insn >> 12) & 0xf; rm = (insn) & 0xf; gen_movl_T0_reg(s, rm); gen_movl_T1_reg(s, rn); if (insn & (1 << 22)) { gen_op_swpb_T0_T1(); } else { gen_op_swpl_T0_T1(); } gen_movl_reg_T0(s, rd); } } else { /* load/store half word */ rn = (insn >> 16) & 0xf; rd = (insn >> 12) & 0xf; gen_movl_T1_reg(s, rn); gen_add_datah_offset(s, insn); if (insn & (1 << 20)) { /* load */ switch(sh) { case 1: gen_op_lduw_T0_T1(); break; case 2: gen_op_ldsb_T0_T1(); break; default: case 3: gen_op_ldsw_T0_T1(); break; } gen_movl_reg_T0(s, rd); } else { /* store */ gen_movl_T0_reg(s, rd); gen_op_stw_T0_T1(); } if (!(insn & (1 << 24))) { gen_add_datah_offset(s, insn); gen_movl_reg_T1(s, rn); } else if (insn & (1 << 21)) { gen_movl_reg_T1(s, rn); } } break; case 0x4: case 0x5: case 0x6: case 0x7: /* load/store byte/word */ rn = (insn >> 16) & 0xf; rd = (insn >> 12) & 0xf; gen_movl_T1_reg(s, rn); if (insn & (1 << 24)) gen_add_data_offset(s, insn); if (insn & (1 << 20)) { /* load */ if (insn & (1 << 22)) gen_op_ldub_T0_T1(); else gen_op_ldl_T0_T1(); gen_movl_reg_T0(s, rd); } else { /* store */ gen_movl_T0_reg(s, rd); if (insn & (1 << 22)) gen_op_stb_T0_T1(); else gen_op_stl_T0_T1(); } if (!(insn & (1 << 24))) { gen_add_data_offset(s, insn); gen_movl_reg_T1(s, rn); } else if (insn & (1 << 21)) gen_movl_reg_T1(s, rn); { } break; case 0x08: case 0x09: { int j, n; /* load/store multiple words */ /* XXX: store correct base if write back */ if (insn & (1 << 22)) goto illegal_op; /* only usable in supervisor mode */ rn = (insn >> 16) & 0xf; gen_movl_T1_reg(s, rn); /* compute total size */ n = 0; for(i=0;i<16;i++) { if (insn & (1 << i)) n++; } /* XXX: test invalid n == 0 case ? */ if (insn & (1 << 23)) { if (insn & (1 << 24)) { /* pre increment */ gen_op_addl_T1_im(4); } else { /* post increment */ } } else { if (insn & (1 << 24)) { /* pre decrement */ gen_op_addl_T1_im(-(n * 4)); } else { /* post decrement */ if (n != 1) gen_op_addl_T1_im(-((n - 1) * 4)); } } j = 0; for(i=0;i<16;i++) { if (insn & (1 << i)) { if (insn & (1 << 20)) { /* load */ gen_op_ldl_T0_T1(); gen_movl_reg_T0(s, i); } else { /* store */ if (i == 15) { /* special case: r15 = PC + 12 */ val = (long)s->pc + 8; gen_op_movl_TN_im[0](val); } else { gen_movl_T0_reg(s, i); } gen_op_stl_T0_T1(); } j++; /* no need to add after the last transfer */ if (j != n) gen_op_addl_T1_im(4); } } if (insn & (1 << 21)) { /* write back */ if (insn & (1 << 23)) { if (insn & (1 << 24)) { /* pre increment */ } else { /* post increment */ gen_op_addl_T1_im(4); } } else { if (insn & (1 << 24)) { /* pre decrement */ if (n != 1) gen_op_addl_T1_im(-((n - 1) * 4)); } else { /* post decrement */ gen_op_addl_T1_im(-(n * 4)); } } gen_movl_reg_T1(s, rn); } } break; case 0xa: case 0xb: { int offset; /* branch (and link) */ val = (int)s->pc; if (insn & (1 << 24)) { gen_op_movl_T0_im(val); gen_op_movl_reg_TN[0][14](); } offset = (((int)insn << 8) >> 8); val += (offset << 2) + 4; gen_op_jmp((long)s->tb, val); s->is_jmp = DISAS_TB_JUMP; } break; case 0xf: /* swi */ gen_op_movl_T0_im((long)s->pc); gen_op_movl_reg_TN[0][15](); gen_op_swi(); s->is_jmp = DISAS_JUMP; break; case 0xc: case 0xd: rd = (insn >> 12) & 0x7; rn = (insn >> 16) & 0xf; gen_movl_T1_reg(s, rn); val = (insn) & 0xff; if (!(insn & (1 << 23))) val = -val; switch((insn >> 8) & 0xf) { case 0x1: /* load/store */ if ((insn & (1 << 24))) gen_op_addl_T1_im(val); /* XXX: do it */ if (!(insn & (1 << 24))) gen_op_addl_T1_im(val); if (insn & (1 << 21)) gen_movl_reg_T1(s, rn); break; case 0x2: { int n, i; /* load store multiple */ if ((insn & (1 << 24))) gen_op_addl_T1_im(val); switch(insn & 0x00408000) { case 0x00008000: n = 1; break; case 0x00400000: n = 2; break; case 0x00408000: n = 3; break; default: n = 4; break; } for(i = 0;i < n; i++) { /* XXX: do it */ } if (!(insn & (1 << 24))) gen_op_addl_T1_im(val); if (insn & (1 << 21)) gen_movl_reg_T1(s, rn); } break; default: goto illegal_op; } break; case 0x0e: /* float ops */ /* XXX: do it */ switch((insn >> 20) & 0xf) { case 0x2: /* wfs */ break; case 0x3: /* rfs */ break; case 0x4: /* wfc */ break; case 0x5: /* rfc */ break; default: goto illegal_op; } break; default: illegal_op: gen_op_movl_T0_im((long)s->pc - 4); gen_op_movl_reg_TN[0][15](); gen_op_undef_insn(); s->is_jmp = DISAS_JUMP; break; } } } /* generate intermediate code in gen_opc_buf and gen_opparam_buf for basic block 'tb'. If search_pc is TRUE, also generate PC information for each intermediate instruction. */ static inline int gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb, int search_pc) { DisasContext dc1, *dc = &dc1; uint16_t *gen_opc_end; int j, lj; uint8_t *pc_start; /* generate intermediate code */ pc_start = (uint8_t *)tb->pc; dc->tb = tb; gen_opc_ptr = gen_opc_buf; gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; gen_opparam_ptr = gen_opparam_buf; dc->is_jmp = DISAS_NEXT; dc->pc = pc_start; lj = -1; do { if (search_pc) { j = gen_opc_ptr - gen_opc_buf; if (lj < j) { lj++; while (lj < j) gen_opc_instr_start[lj++] = 0; } gen_opc_pc[lj] = (uint32_t)dc->pc; gen_opc_instr_start[lj] = 1; } disas_arm_insn(dc); } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end && (dc->pc - pc_start) < (TARGET_PAGE_SIZE - 32)); switch(dc->is_jmp) { case DISAS_JUMP_NEXT: case DISAS_NEXT: gen_op_jmp((long)dc->tb, (long)dc->pc); break; default: case DISAS_JUMP: /* indicate that the hash table must be used to find the next TB */ gen_op_movl_T0_0(); gen_op_exit_tb(); break; case DISAS_TB_JUMP: /* nothing more to generate */ break; } *gen_opc_ptr = INDEX_op_end; #ifdef DEBUG_DISAS if (loglevel) { fprintf(logfile, "----------------\n"); fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start)); disas(logfile, pc_start, dc->pc - pc_start, 0, 0); fprintf(logfile, "\n"); fprintf(logfile, "OP:\n"); dump_ops(gen_opc_buf, gen_opparam_buf); fprintf(logfile, "\n"); } #endif if (!search_pc) tb->size = dc->pc - pc_start; return 0; } int gen_intermediate_code(CPUState *env, TranslationBlock *tb) { return gen_intermediate_code_internal(env, tb, 0); } int gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb) { return gen_intermediate_code_internal(env, tb, 1); } CPUARMState *cpu_arm_init(void) { CPUARMState *env; cpu_exec_init(); env = malloc(sizeof(CPUARMState)); if (!env) return NULL; memset(env, 0, sizeof(CPUARMState)); return env; } void cpu_arm_close(CPUARMState *env) { free(env); } void cpu_arm_dump_state(CPUARMState *env, FILE *f, int flags) { int i; for(i=0;i<16;i++) { fprintf(f, "R%02d=%08x", i, env->regs[i]); if ((i % 4) == 3) fprintf(f, "\n"); else fprintf(f, " "); } fprintf(f, "PSR=%08x %c%c%c%c\n", env->cpsr, env->cpsr & (1 << 31) ? 'N' : '-', env->cpsr & (1 << 30) ? 'Z' : '-', env->cpsr & (1 << 29) ? 'C' : '-', env->cpsr & (1 << 28) ? 'V' : '-'); } target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr) { return addr; }