diff options
| -rw-r--r-- | disas/riscv.c | 209 |
1 files changed, 92 insertions, 117 deletions
diff --git a/disas/riscv.c b/disas/riscv.c index 297cfa2f63..90d6b26de9 100644 --- a/disas/riscv.c +++ b/disas/riscv.c @@ -4820,272 +4820,249 @@ static size_t inst_length(rv_inst inst) /* format instruction */ -static void append(char *s1, const char *s2, size_t n) -{ - size_t l1 = strlen(s1); - if (n - l1 - 1 > 0) { - strncat(s1, s2, n - l1); - } -} - -static void format_inst(char *buf, size_t buflen, size_t tab, rv_decode *dec) +static GString *format_inst(size_t tab, rv_decode *dec) { const rv_opcode_data *opcode_data = dec->opcode_data; - char tmp[64]; + GString *buf = g_string_sized_new(64); const char *fmt; fmt = opcode_data[dec->op].format; while (*fmt) { switch (*fmt) { case 'O': - append(buf, opcode_data[dec->op].name, buflen); + g_string_append(buf, opcode_data[dec->op].name); break; case '(': - append(buf, "(", buflen); - break; case ',': - append(buf, ",", buflen); - break; case ')': - append(buf, ")", buflen); - break; case '-': - append(buf, "-", buflen); + g_string_append_c(buf, *fmt); break; case 'b': - snprintf(tmp, sizeof(tmp), "%d", dec->bs); - append(buf, tmp, buflen); + g_string_append_printf(buf, "%d", dec->bs); break; case 'n': - snprintf(tmp, sizeof(tmp), "%d", dec->rnum); - append(buf, tmp, buflen); + g_string_append_printf(buf, "%d", dec->rnum); break; case '0': - append(buf, rv_ireg_name_sym[dec->rd], buflen); + g_string_append(buf, rv_ireg_name_sym[dec->rd]); break; case '1': - append(buf, rv_ireg_name_sym[dec->rs1], buflen); + g_string_append(buf, rv_ireg_name_sym[dec->rs1]); break; case '2': - append(buf, rv_ireg_name_sym[dec->rs2], buflen); + g_string_append(buf, rv_ireg_name_sym[dec->rs2]); break; case '3': - append(buf, dec->cfg->ext_zfinx ? rv_ireg_name_sym[dec->rd] : - rv_freg_name_sym[dec->rd], - buflen); + if (dec->cfg->ext_zfinx) { + g_string_append(buf, rv_ireg_name_sym[dec->rd]); + } else { + g_string_append(buf, rv_freg_name_sym[dec->rd]); + } break; case '4': - append(buf, dec->cfg->ext_zfinx ? rv_ireg_name_sym[dec->rs1] : - rv_freg_name_sym[dec->rs1], - buflen); + if (dec->cfg->ext_zfinx) { + g_string_append(buf, rv_ireg_name_sym[dec->rs1]); + } else { + g_string_append(buf, rv_freg_name_sym[dec->rs1]); + } break; case '5': - append(buf, dec->cfg->ext_zfinx ? rv_ireg_name_sym[dec->rs2] : - rv_freg_name_sym[dec->rs2], - buflen); + if (dec->cfg->ext_zfinx) { + g_string_append(buf, rv_ireg_name_sym[dec->rs2]); + } else { + g_string_append(buf, rv_freg_name_sym[dec->rs2]); + } break; case '6': - append(buf, dec->cfg->ext_zfinx ? rv_ireg_name_sym[dec->rs3] : - rv_freg_name_sym[dec->rs3], - buflen); + if (dec->cfg->ext_zfinx) { + g_string_append(buf, rv_ireg_name_sym[dec->rs3]); + } else { + g_string_append(buf, rv_freg_name_sym[dec->rs3]); + } break; case '7': - snprintf(tmp, sizeof(tmp), "%d", dec->rs1); - append(buf, tmp, buflen); + g_string_append_printf(buf, "%d", dec->rs1); break; case 'i': - snprintf(tmp, sizeof(tmp), "%d", dec->imm); - append(buf, tmp, buflen); + g_string_append_printf(buf, "%d", dec->imm); break; case 'u': - snprintf(tmp, sizeof(tmp), "%u", ((uint32_t)dec->imm & 0b111111)); - append(buf, tmp, buflen); + g_string_append_printf(buf, "%u", ((uint32_t)dec->imm & 0b111111)); break; case 'j': - snprintf(tmp, sizeof(tmp), "%d", dec->imm1); - append(buf, tmp, buflen); + g_string_append_printf(buf, "%d", dec->imm1); break; case 'o': - snprintf(tmp, sizeof(tmp), "%d", dec->imm); - append(buf, tmp, buflen); - while (strlen(buf) < tab * 2) { - append(buf, " ", buflen); + g_string_append_printf(buf, "%d", dec->imm); + while (buf->len < tab * 2) { + g_string_append_c(buf, ' '); } - snprintf(tmp, sizeof(tmp), "# 0x%" PRIx64, - dec->pc + dec->imm); - append(buf, tmp, buflen); + g_string_append_printf(buf, "# 0x%" PRIx64, dec->pc + dec->imm); break; case 'U': fmt++; - snprintf(tmp, sizeof(tmp), "%d", dec->imm >> 12); - append(buf, tmp, buflen); + g_string_append_printf(buf, "%d", dec->imm >> 12); if (*fmt == 'o') { - while (strlen(buf) < tab * 2) { - append(buf, " ", buflen); + while (buf->len < tab * 2) { + g_string_append_c(buf, ' '); } - snprintf(tmp, sizeof(tmp), "# 0x%" PRIx64, - dec->pc + dec->imm); - append(buf, tmp, buflen); + g_string_append_printf(buf, "# 0x%" PRIx64, dec->pc + dec->imm); } break; case 'c': { const char *name = csr_name(dec->imm & 0xfff); if (name) { - append(buf, name, buflen); + g_string_append(buf, name); } else { - snprintf(tmp, sizeof(tmp), "0x%03x", dec->imm & 0xfff); - append(buf, tmp, buflen); + g_string_append_printf(buf, "0x%03x", dec->imm & 0xfff); } break; } case 'r': switch (dec->rm) { case rv_rm_rne: - append(buf, "rne", buflen); + g_string_append(buf, "rne"); break; case rv_rm_rtz: - append(buf, "rtz", buflen); + g_string_append(buf, "rtz"); break; case rv_rm_rdn: - append(buf, "rdn", buflen); + g_string_append(buf, "rdn"); break; case rv_rm_rup: - append(buf, "rup", buflen); + g_string_append(buf, "rup"); break; case rv_rm_rmm: - append(buf, "rmm", buflen); + g_string_append(buf, "rmm"); break; case rv_rm_dyn: - append(buf, "dyn", buflen); + g_string_append(buf, "dyn"); break; default: - append(buf, "inv", buflen); + g_string_append(buf, "inv"); break; } break; case 'p': if (dec->pred & rv_fence_i) { - append(buf, "i", buflen); + g_string_append_c(buf, 'i'); } if (dec->pred & rv_fence_o) { - append(buf, "o", buflen); + g_string_append_c(buf, 'o'); } if (dec->pred & rv_fence_r) { - append(buf, "r", buflen); + g_string_append_c(buf, 'r'); } if (dec->pred & rv_fence_w) { - append(buf, "w", buflen); + g_string_append_c(buf, 'w'); } break; case 's': if (dec->succ & rv_fence_i) { - append(buf, "i", buflen); + g_string_append_c(buf, 'i'); } if (dec->succ & rv_fence_o) { - append(buf, "o", buflen); + g_string_append_c(buf, 'o'); } if (dec->succ & rv_fence_r) { - append(buf, "r", buflen); + g_string_append_c(buf, 'r'); } if (dec->succ & rv_fence_w) { - append(buf, "w", buflen); + g_string_append_c(buf, 'w'); } break; case '\t': - while (strlen(buf) < tab) { - append(buf, " ", buflen); + while (buf->len < tab) { + g_string_append_c(buf, ' '); } break; case 'A': if (dec->aq) { - append(buf, ".aq", buflen); + g_string_append(buf, ".aq"); } break; case 'R': if (dec->rl) { - append(buf, ".rl", buflen); + g_string_append(buf, ".rl"); } break; case 'l': - append(buf, ",v0", buflen); + g_string_append(buf, ",v0"); break; case 'm': if (dec->vm == 0) { - append(buf, ",v0.t", buflen); + g_string_append(buf, ",v0.t"); } break; case 'D': - append(buf, rv_vreg_name_sym[dec->rd], buflen); + g_string_append(buf, rv_vreg_name_sym[dec->rd]); break; case 'E': - append(buf, rv_vreg_name_sym[dec->rs1], buflen); + g_string_append(buf, rv_vreg_name_sym[dec->rs1]); break; case 'F': - append(buf, rv_vreg_name_sym[dec->rs2], buflen); + g_string_append(buf, rv_vreg_name_sym[dec->rs2]); break; case 'G': - append(buf, rv_vreg_name_sym[dec->rs3], buflen); + g_string_append(buf, rv_vreg_name_sym[dec->rs3]); break; case 'v': { - char nbuf[32] = {0}; const int sew = 1 << (((dec->vzimm >> 3) & 0b111) + 3); - sprintf(nbuf, "%d", sew); const int lmul = dec->vzimm & 0b11; const int flmul = (dec->vzimm >> 2) & 1; const char *vta = (dec->vzimm >> 6) & 1 ? "ta" : "tu"; const char *vma = (dec->vzimm >> 7) & 1 ? "ma" : "mu"; - append(buf, "e", buflen); - append(buf, nbuf, buflen); - append(buf, ",m", buflen); + + g_string_append_printf(buf, "e%d,m", sew); if (flmul) { switch (lmul) { case 3: - sprintf(nbuf, "f2"); + g_string_append(buf, "f2"); break; case 2: - sprintf(nbuf, "f4"); + g_string_append(buf, "f4"); break; case 1: - sprintf(nbuf, "f8"); - break; + g_string_append(buf, "f8"); + break; } - append(buf, nbuf, buflen); } else { - sprintf(nbuf, "%d", 1 << lmul); - append(buf, nbuf, buflen); + g_string_append_printf(buf, "%d", 1 << lmul); } - append(buf, ",", buflen); - append(buf, vta, buflen); - append(buf, ",", buflen); - append(buf, vma, buflen); + g_string_append_c(buf, ','); + g_string_append(buf, vta); + g_string_append_c(buf, ','); + g_string_append(buf, vma); break; } case 'x': { switch (dec->rlist) { case 4: - snprintf(tmp, sizeof(tmp), "{ra}"); + g_string_append(buf, "{ra}"); break; case 5: - snprintf(tmp, sizeof(tmp), "{ra, s0}"); + g_string_append(buf, "{ra, s0}"); break; case 15: - snprintf(tmp, sizeof(tmp), "{ra, s0-s11}"); + g_string_append(buf, "{ra, s0-s11}"); break; default: - snprintf(tmp, sizeof(tmp), "{ra, s0-s%d}", dec->rlist - 5); + g_string_append_printf(buf, "{ra, s0-s%d}", dec->rlist - 5); break; } - append(buf, tmp, buflen); break; } case 'h': - append(buf, rv_fli_name_const[dec->imm], buflen); + g_string_append(buf, rv_fli_name_const[dec->imm]); break; default: break; } fmt++; } + + return buf; } /* lift instruction to pseudo-instruction */ @@ -5171,9 +5148,8 @@ static void decode_inst_decompress(rv_decode *dec, rv_isa isa) /* disassemble instruction */ -static void -disasm_inst(char *buf, size_t buflen, rv_isa isa, uint64_t pc, rv_inst inst, - RISCVCPUConfig *cfg) +static GString *disasm_inst(rv_isa isa, uint64_t pc, rv_inst inst, + RISCVCPUConfig *cfg) { rv_decode dec = { 0 }; dec.pc = pc; @@ -5220,7 +5196,7 @@ disasm_inst(char *buf, size_t buflen, rv_isa isa, uint64_t pc, rv_inst inst, decode_inst_operands(&dec, isa); decode_inst_decompress(&dec, isa); decode_inst_lift_pseudo(&dec); - format_inst(buf, buflen, 24, &dec); + return format_inst(24, &dec); } #define INST_FMT_2 "%04" PRIx64 " " @@ -5231,7 +5207,6 @@ disasm_inst(char *buf, size_t buflen, rv_isa isa, uint64_t pc, rv_inst inst, static int print_insn_riscv(bfd_vma memaddr, struct disassemble_info *info, rv_isa isa) { - char buf[128] = { 0 }; bfd_byte packet[2]; rv_inst inst = 0; size_t len = 2; @@ -5272,9 +5247,9 @@ print_insn_riscv(bfd_vma memaddr, struct disassemble_info *info, rv_isa isa) } } - disasm_inst(buf, sizeof(buf), isa, memaddr, inst, - (RISCVCPUConfig *)info->target_info); - (*info->fprintf_func)(info->stream, "%s", buf); + g_autoptr(GString) str = + disasm_inst(isa, memaddr, inst, (RISCVCPUConfig *)info->target_info); + (*info->fprintf_func)(info->stream, "%s", str->str); return len; } |