/* Instruction printing code for Score Copyright 2006 Free Software Foundation, Inc. Contributed by: Mei Ligang (ligang@sunnorth.com.cn) Pei-Lin Tsai (pltsai@sunplus.com) This file is part of libopcodes. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include "sysdep.h" #include "dis-asm.h" #define DEFINE_TABLE #include "score-opc.h" #include "opintl.h" #include "bfd.h" /* FIXME: This shouldn't be done here. */ #include "elf-bfd.h" #include "elf/internal.h" #include "elf/score.h" #ifndef streq #define streq(a,b) (strcmp ((a), (b)) == 0) #endif #ifndef strneq #define strneq(a,b,n) (strncmp ((a), (b), (n)) == 0) #endif #ifndef NUM_ELEM #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) #endif typedef struct { const char *name; const char *description; const char *reg_names[32]; } score_regname; static score_regname regnames[] = { {"gcc", "Select register names used by GCC", {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "gp", "r29", "r30", "r31"}}, }; static unsigned int regname_selected = 0; #define NUM_SCORE_REGNAMES NUM_ELEM (regnames) #define score_regnames regnames[regname_selected].reg_names /* Print one instruction from PC on INFO->STREAM. Return the size of the instruction. */ static int print_insn_score32 (bfd_vma pc, struct disassemble_info *info, long given) { struct score_opcode *insn; void *stream = info->stream; fprintf_ftype func = info->fprintf_func; for (insn = score_opcodes; insn->assembler; insn++) { if ((insn->mask & 0xffff0000) && (given & insn->mask) == insn->value) { char *c; for (c = insn->assembler; *c; c++) { if (*c == '%') { switch (*++c) { case 'j': { int target; if (info->flags & INSN_HAS_RELOC) pc = 0; target = (pc & 0xfe000000) | (given & 0x01fffffe); (*info->print_address_func) (target, info); } break; case 'b': { /* Sign-extend a 20-bit number. */ #define SEXT20(x) ((((x) & 0xfffff) ^ (~ 0x7ffff)) + 0x80000) int disp = ((given & 0x01ff8000) >> 5) | (given & 0x3fe); int target = (pc + SEXT20 (disp)); (*info->print_address_func) (target, info); } break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { int bitstart = *c++ - '0'; int bitend = 0; while (*c >= '0' && *c <= '9') bitstart = (bitstart * 10) + *c++ - '0'; switch (*c) { case '-': c++; while (*c >= '0' && *c <= '9') bitend = (bitend * 10) + *c++ - '0'; if (!bitend) abort (); switch (*c) { case 'r': { long reg; reg = given >> bitstart; reg &= (2 << (bitend - bitstart)) - 1; func (stream, "%s", score_regnames[reg]); } break; case 'd': { long reg; reg = given >> bitstart; reg &= (2 << (bitend - bitstart)) - 1; func (stream, "%ld", reg); } break; case 'i': { long reg; reg = given >> bitstart; reg &= (2 << (bitend - bitstart)) - 1; reg = ((reg ^ (1 << (bitend - bitstart))) - (1 << (bitend - bitstart))); if (((given & insn->mask) == 0x0c00000a) /* ldc1 */ || ((given & insn->mask) == 0x0c000012) /* ldc2 */ || ((given & insn->mask) == 0x0c00001c) /* ldc3 */ || ((given & insn->mask) == 0x0c00000b) /* stc1 */ || ((given & insn->mask) == 0x0c000013) /* stc2 */ || ((given & insn->mask) == 0x0c00001b)) /* stc3 */ reg <<= 2; func (stream, "%ld", reg); } break; case 'x': { long reg; reg = given >> bitstart; reg &= (2 << (bitend - bitstart)) - 1; func (stream, "%lx", reg); } break; default: abort (); } break; case '`': c++; if ((given & (1 << bitstart)) == 0) func (stream, "%c", *c); break; case '\'': c++; if ((given & (1 << bitstart)) != 0) func (stream, "%c", *c); break; default: abort (); } break; default: abort (); } } } else func (stream, "%c", *c); } return 4; } } #if (SCORE_SIMULATOR_ACTIVE) func (stream, _("")); return 4; #endif abort (); } static void print_insn_parallel_sym (struct disassemble_info *info) { void *stream = info->stream; fprintf_ftype func = info->fprintf_func; /* 10: 0000 nop! 4 space + 1 colon + 1 space + 1 tab + 8 opcode + 2 space + 1 tab. FIXME: the space number is not accurate. */ func (stream, "%s", " ||\n \t \t"); } /* Print one instruction from PC on INFO->STREAM. Return the size of the instruction. */ static int print_insn_score16 (bfd_vma pc, struct disassemble_info *info, long given) { struct score_opcode *insn; void *stream = info->stream; fprintf_ftype func = info->fprintf_func; given &= 0xffff; for (insn = score_opcodes; insn->assembler; insn++) { if (!(insn->mask & 0xffff0000) && (given & insn->mask) == insn->value) { char *c = insn->assembler; info->bytes_per_chunk = 2; info->bytes_per_line = 4; given &= 0xffff; for (; *c; c++) { if (*c == '%') { switch (*++c) { case 'j': { int target; if (info->flags & INSN_HAS_RELOC) pc = 0; target = (pc & 0xfffff000) | (given & 0x00000ffe); (*info->print_address_func) (target, info); } break; case 'b': { /* Sign-extend a 9-bit number. */ #define SEXT9(x) ((((x) & 0x1ff) ^ (~ 0xff)) + 0x100) int disp = (given & 0xff) << 1; int target = (pc + SEXT9 (disp)); (*info->print_address_func) (target, info); } break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { int bitstart = *c++ - '0'; int bitend = 0; while (*c >= '0' && *c <= '9') bitstart = (bitstart * 10) + *c++ - '0'; switch (*c) { case '-': { long reg; c++; while (*c >= '0' && *c <= '9') bitend = (bitend * 10) + *c++ - '0'; if (!bitend) abort (); reg = given >> bitstart; reg &= (2 << (bitend - bitstart)) - 1; switch (*c) { case 'R': func (stream, "%s", score_regnames[reg + 16]); break; case 'r': func (stream, "%s", score_regnames[reg]); break; case 'd': if (*(c + 1) == '\0') func (stream, "%ld", reg); else { c++; if (*c == '1') func (stream, "%ld", reg << 1); else if (*c == '2') func (stream, "%ld", reg << 2); } break; case 'x': if (*(c + 1) == '\0') func (stream, "%lx", reg); else { c++; if (*c == '1') func (stream, "%lx", reg << 1); else if (*c == '2') func (stream, "%lx", reg << 2); } break; case 'i': reg = ((reg ^ (1 << bitend)) - (1 << bitend)); func (stream, "%ld", reg); break; default: abort (); } } break; case '\'': c++; if ((given & (1 << bitstart)) != 0) func (stream, "%c", *c); break; default: abort (); } } break; default: abort (); } } else func (stream, "%c", *c); } return 2; } } #if (SCORE_SIMULATOR_ACTIVE) func (stream, _("")); return 2; #endif /* No match. */ abort (); } /* NOTE: There are no checks in these routines that the relevant number of data bytes exist. */ static int print_insn (bfd_vma pc, struct disassemble_info *info, bfd_boolean little) { unsigned char b[4]; long given; long ridparity; int status; bfd_boolean insn_pce_p = FALSE; bfd_boolean insn_16_p = FALSE; info->display_endian = little ? BFD_ENDIAN_LITTLE : BFD_ENDIAN_BIG; if (pc & 0x2) { info->bytes_per_chunk = 2; status = info->read_memory_func (pc, (bfd_byte *) b, 2, info); b[3] = b[2] = 0; insn_16_p = TRUE; } else { info->bytes_per_chunk = 4; status = info->read_memory_func (pc, (bfd_byte *) & b[0], 4, info); if (status != 0) { info->bytes_per_chunk = 2; status = info->read_memory_func (pc, (bfd_byte *) b, 2, info); b[3] = b[2] = 0; insn_16_p = TRUE; } } if (status != 0) { info->memory_error_func (status, pc, info); return -1; } if (little) { given = (b[0]) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24); } else { given = (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | (b[3]); } if ((given & 0x80008000) == 0x80008000) { insn_pce_p = FALSE; insn_16_p = FALSE; } else if ((given & 0x8000) == 0x8000) { insn_pce_p = TRUE; } else { insn_16_p = TRUE; } /* 16 bit instruction. */ if (insn_16_p) { if (little) { given = b[0] | (b[1] << 8); } else { given = (b[0] << 8) | b[1]; } status = print_insn_score16 (pc, info, given); } /* pce instruction. */ else if (insn_pce_p) { long other; other = given & 0xFFFF; given = (given & 0xFFFF0000) >> 16; status = print_insn_score16 (pc, info, given); print_insn_parallel_sym (info); status += print_insn_score16 (pc, info, other); /* disassemble_bytes() will output 4 byte per chunk for pce instructio. */ info->bytes_per_chunk = 4; } /* 32 bit instruction. */ else { /* Get rid of parity. */ ridparity = (given & 0x7FFF); ridparity |= (given & 0x7FFF0000) >> 1; given = ridparity; status = print_insn_score32 (pc, info, given); } return status; } int print_insn_big_score (bfd_vma pc, struct disassemble_info *info) { return print_insn (pc, info, FALSE); } int print_insn_little_score (bfd_vma pc, struct disassemble_info *info) { return print_insn (pc, info, TRUE); }