| /* Disassemble SH instructions. |
| Copyright 1993, 1994, 1995, 1997, 1998, 2000 |
| Free Software Foundation, Inc. |
| |
| 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include <stdio.h> |
| #include "sysdep.h" |
| #define STATIC_TABLE |
| #define DEFINE_TABLE |
| |
| #include "sh-opc.h" |
| #include "dis-asm.h" |
| |
| #define LITTLE_BIT 2 |
| |
| static void |
| print_movxy (op, rn, rm, fprintf_fn, stream) |
| sh_opcode_info *op; |
| int rn, rm; |
| fprintf_ftype fprintf_fn; |
| void *stream; |
| { |
| int n; |
| |
| fprintf_fn (stream, "%s\t", op->name); |
| for (n = 0; n < 2; n++) |
| { |
| switch (op->arg[n]) |
| { |
| case A_IND_N: |
| fprintf_fn (stream, "@r%d", rn); |
| break; |
| case A_INC_N: |
| fprintf_fn (stream, "@r%d+", rn); |
| break; |
| case A_PMOD_N: |
| fprintf_fn (stream, "@r%d+r8", rn); |
| break; |
| case A_PMODY_N: |
| fprintf_fn (stream, "@r%d+r9", rn); |
| break; |
| case DSP_REG_M: |
| fprintf_fn (stream, "a%c", '0' + rm); |
| break; |
| case DSP_REG_X: |
| fprintf_fn (stream, "x%c", '0' + rm); |
| break; |
| case DSP_REG_Y: |
| fprintf_fn (stream, "y%c", '0' + rm); |
| break; |
| default: |
| abort (); |
| } |
| if (n == 0) |
| fprintf_fn (stream, ","); |
| } |
| } |
| |
| /* Print a double data transfer insn. INSN is just the lower three |
| nibbles of the insn, i.e. field a and the bit that indicates if |
| a parallel processing insn follows. |
| Return nonzero if a field b of a parallel processing insns follows. */ |
| |
| static void |
| print_insn_ddt (insn, info) |
| int insn; |
| struct disassemble_info *info; |
| { |
| fprintf_ftype fprintf_fn = info->fprintf_func; |
| void *stream = info->stream; |
| |
| /* If this is just a nop, make sure to emit something. */ |
| if (insn == 0x000) |
| fprintf_fn (stream, "nopx\tnopy"); |
| |
| /* If a parallel processing insn was printed before, |
| and we got a non-nop, emit a tab. */ |
| if ((insn & 0x800) && (insn & 0x3ff)) |
| fprintf_fn (stream, "\t"); |
| |
| /* Check if either the x or y part is invalid. */ |
| if (((insn & 0xc) == 0 && (insn & 0x2a0)) |
| || ((insn & 3) == 0 && (insn & 0x150))) |
| fprintf_fn (stream, ".word 0x%x", insn); |
| else |
| { |
| static sh_opcode_info *first_movx, *first_movy; |
| sh_opcode_info *opx, *opy; |
| unsigned int insn_x, insn_y; |
| |
| if (! first_movx) |
| { |
| for (first_movx = sh_table; first_movx->nibbles[1] != MOVX;) |
| first_movx++; |
| for (first_movy = first_movx; first_movy->nibbles[1] != MOVY;) |
| first_movy++; |
| } |
| insn_x = (insn >> 2) & 0xb; |
| if (insn_x) |
| { |
| for (opx = first_movx; opx->nibbles[2] != insn_x;) |
| opx++; |
| print_movxy (opx, ((insn >> 9) & 1) + 4, (insn >> 7) & 1, |
| fprintf_fn, stream); |
| } |
| insn_y = (insn & 3) | ((insn >> 1) & 8); |
| if (insn_y) |
| { |
| if (insn_x) |
| fprintf_fn (stream, "\t"); |
| for (opy = first_movy; opy->nibbles[2] != insn_y;) |
| opy++; |
| print_movxy (opy, ((insn >> 8) & 1) + 6, (insn >> 6) & 1, |
| fprintf_fn, stream); |
| } |
| } |
| } |
| |
| static void |
| print_dsp_reg (rm, fprintf_fn, stream) |
| int rm; |
| fprintf_ftype fprintf_fn; |
| void *stream; |
| { |
| switch (rm) |
| { |
| case A_A1_NUM: |
| fprintf_fn (stream, "a1"); |
| break; |
| case A_A0_NUM: |
| fprintf_fn (stream, "a0"); |
| break; |
| case A_X0_NUM: |
| fprintf_fn (stream, "x0"); |
| break; |
| case A_X1_NUM: |
| fprintf_fn (stream, "x1"); |
| break; |
| case A_Y0_NUM: |
| fprintf_fn (stream, "y0"); |
| break; |
| case A_Y1_NUM: |
| fprintf_fn (stream, "y1"); |
| break; |
| case A_M0_NUM: |
| fprintf_fn (stream, "m0"); |
| break; |
| case A_A1G_NUM: |
| fprintf_fn (stream, "a1g"); |
| break; |
| case A_M1_NUM: |
| fprintf_fn (stream, "m1"); |
| break; |
| case A_A0G_NUM: |
| fprintf_fn (stream, "a0g"); |
| break; |
| default: |
| fprintf_fn (stream, "0x%x", rm); |
| break; |
| } |
| } |
| |
| static void |
| print_insn_ppi (field_b, info) |
| int field_b; |
| struct disassemble_info *info; |
| { |
| static char *sx_tab[] = { "x0", "x1", "a0", "a1" }; |
| static char *sy_tab[] = { "y0", "y1", "m0", "m1" }; |
| fprintf_ftype fprintf_fn = info->fprintf_func; |
| void *stream = info->stream; |
| unsigned int nib1, nib2, nib3; |
| char *dc = NULL; |
| sh_opcode_info *op; |
| |
| if ((field_b & 0xe800) == 0) |
| { |
| fprintf_fn (stream, "psh%c\t#%d,", |
| field_b & 0x1000 ? 'a' : 'l', |
| (field_b >> 4) & 127); |
| print_dsp_reg (field_b & 0xf, fprintf_fn, stream); |
| return; |
| } |
| if ((field_b & 0xc000) == 0x4000 && (field_b & 0x3000) != 0x1000) |
| { |
| static char *du_tab[] = { "x0", "y0", "a0", "a1" }; |
| static char *se_tab[] = { "x0", "x1", "y0", "a1" }; |
| static char *sf_tab[] = { "y0", "y1", "x0", "a1" }; |
| static char *sg_tab[] = { "m0", "m1", "a0", "a1" }; |
| |
| if (field_b & 0x2000) |
| { |
| fprintf_fn (stream, "p%s %s,%s,%s\t", |
| (field_b & 0x1000) ? "add" : "sub", |
| sx_tab[(field_b >> 6) & 3], |
| sy_tab[(field_b >> 4) & 3], |
| du_tab[(field_b >> 0) & 3]); |
| } |
| fprintf_fn (stream, "pmuls%c%s,%s,%s", |
| field_b & 0x2000 ? ' ' : '\t', |
| se_tab[(field_b >> 10) & 3], |
| sf_tab[(field_b >> 8) & 3], |
| sg_tab[(field_b >> 2) & 3]); |
| return; |
| } |
| |
| nib1 = PPIC; |
| nib2 = field_b >> 12 & 0xf; |
| nib3 = field_b >> 8 & 0xf; |
| switch (nib3 & 0x3) |
| { |
| case 0: |
| dc = ""; |
| nib1 = PPI3; |
| break; |
| case 1: |
| dc = ""; |
| break; |
| case 2: |
| dc = "dct "; |
| nib3 -= 1; |
| break; |
| case 3: |
| dc = "dcf "; |
| nib3 -= 2; |
| break; |
| } |
| for (op = sh_table; op->name; op++) |
| { |
| if (op->nibbles[1] == nib1 |
| && op->nibbles[2] == nib2 |
| && op->nibbles[3] == nib3) |
| { |
| int n; |
| |
| fprintf_fn (stream, "%s%s\t", dc, op->name); |
| for (n = 0; n < 3 && op->arg[n] != A_END; n++) |
| { |
| if (n && op->arg[1] != A_END) |
| fprintf_fn (stream, ","); |
| switch (op->arg[n]) |
| { |
| case DSP_REG_N: |
| print_dsp_reg (field_b & 0xf, fprintf_fn, stream); |
| break; |
| case DSP_REG_X: |
| fprintf_fn (stream, sx_tab[(field_b >> 6) & 3]); |
| break; |
| case DSP_REG_Y: |
| fprintf_fn (stream, sy_tab[(field_b >> 4) & 3]); |
| break; |
| case A_MACH: |
| fprintf_fn (stream, "mach"); |
| break; |
| case A_MACL: |
| fprintf_fn (stream, "macl"); |
| break; |
| default: |
| abort (); |
| } |
| } |
| return; |
| } |
| } |
| /* Not found. */ |
| fprintf_fn (stream, ".word 0x%x", field_b); |
| } |
| |
| static int |
| print_insn_shx (memaddr, info) |
| bfd_vma memaddr; |
| struct disassemble_info *info; |
| { |
| fprintf_ftype fprintf_fn = info->fprintf_func; |
| void *stream = info->stream; |
| unsigned char insn[2]; |
| unsigned char nibs[4]; |
| int status; |
| bfd_vma relmask = ~(bfd_vma) 0; |
| sh_opcode_info *op; |
| int target_arch; |
| |
| switch (info->mach) |
| { |
| case bfd_mach_sh: |
| target_arch = arch_sh1; |
| break; |
| case bfd_mach_sh2: |
| target_arch = arch_sh2; |
| break; |
| case bfd_mach_sh_dsp: |
| target_arch = arch_sh_dsp; |
| break; |
| case bfd_mach_sh3: |
| target_arch = arch_sh3; |
| break; |
| case bfd_mach_sh3_dsp: |
| target_arch = arch_sh3_dsp; |
| break; |
| case bfd_mach_sh3e: |
| target_arch = arch_sh3e; |
| break; |
| case bfd_mach_sh4: |
| target_arch = arch_sh4; |
| break; |
| default: |
| abort (); |
| } |
| |
| status = info->read_memory_func (memaddr, insn, 2, info); |
| |
| if (status != 0) |
| { |
| info->memory_error_func (status, memaddr, info); |
| return -1; |
| } |
| |
| if (info->flags & LITTLE_BIT) |
| { |
| nibs[0] = (insn[1] >> 4) & 0xf; |
| nibs[1] = insn[1] & 0xf; |
| |
| nibs[2] = (insn[0] >> 4) & 0xf; |
| nibs[3] = insn[0] & 0xf; |
| } |
| else |
| { |
| nibs[0] = (insn[0] >> 4) & 0xf; |
| nibs[1] = insn[0] & 0xf; |
| |
| nibs[2] = (insn[1] >> 4) & 0xf; |
| nibs[3] = insn[1] & 0xf; |
| } |
| |
| if (nibs[0] == 0xf && (nibs[1] & 4) == 0 && target_arch & arch_sh_dsp_up) |
| { |
| if (nibs[1] & 8) |
| { |
| int field_b; |
| |
| status = info->read_memory_func (memaddr + 2, insn, 2, info); |
| |
| if (status != 0) |
| { |
| info->memory_error_func (status, memaddr + 2, info); |
| return -1; |
| } |
| |
| if (info->flags & LITTLE_BIT) |
| field_b = insn[1] << 8 | insn[0]; |
| else |
| field_b = insn[0] << 8 | insn[1]; |
| |
| print_insn_ppi (field_b, info); |
| print_insn_ddt ((nibs[1] << 8) | (nibs[2] << 4) | nibs[3], info); |
| return 4; |
| } |
| print_insn_ddt ((nibs[1] << 8) | (nibs[2] << 4) | nibs[3], info); |
| return 2; |
| } |
| for (op = sh_table; op->name; op++) |
| { |
| int n; |
| int imm = 0; |
| int rn = 0; |
| int rm = 0; |
| int rb = 0; |
| int disp_pc; |
| bfd_vma disp_pc_addr = 0; |
| |
| if ((op->arch & target_arch) == 0) |
| goto fail; |
| for (n = 0; n < 4; n++) |
| { |
| int i = op->nibbles[n]; |
| |
| if (i < 16) |
| { |
| if (nibs[n] == i) |
| continue; |
| goto fail; |
| } |
| switch (i) |
| { |
| case BRANCH_8: |
| imm = (nibs[2] << 4) | (nibs[3]); |
| if (imm & 0x80) |
| imm |= ~0xff; |
| imm = ((char) imm) * 2 + 4; |
| goto ok; |
| case BRANCH_12: |
| imm = ((nibs[1]) << 8) | (nibs[2] << 4) | (nibs[3]); |
| if (imm & 0x800) |
| imm |= ~0xfff; |
| imm = imm * 2 + 4; |
| goto ok; |
| case IMM0_4: |
| case IMM1_4: |
| imm = nibs[3]; |
| goto ok; |
| case IMM0_4BY2: |
| case IMM1_4BY2: |
| imm = nibs[3] << 1; |
| goto ok; |
| case IMM0_4BY4: |
| case IMM1_4BY4: |
| imm = nibs[3] << 2; |
| goto ok; |
| case IMM0_8: |
| case IMM1_8: |
| imm = (nibs[2] << 4) | nibs[3]; |
| goto ok; |
| case PCRELIMM_8BY2: |
| imm = ((nibs[2] << 4) | nibs[3]) << 1; |
| relmask = ~(bfd_vma) 1; |
| goto ok; |
| case PCRELIMM_8BY4: |
| imm = ((nibs[2] << 4) | nibs[3]) << 2; |
| relmask = ~(bfd_vma) 3; |
| goto ok; |
| case IMM0_8BY2: |
| case IMM1_8BY2: |
| imm = ((nibs[2] << 4) | nibs[3]) << 1; |
| goto ok; |
| case IMM0_8BY4: |
| case IMM1_8BY4: |
| imm = ((nibs[2] << 4) | nibs[3]) << 2; |
| goto ok; |
| case REG_N: |
| rn = nibs[n]; |
| break; |
| case REG_M: |
| rm = nibs[n]; |
| break; |
| case REG_NM: |
| rn = (nibs[n] & 0xc) >> 2; |
| rm = (nibs[n] & 0x3); |
| break; |
| case REG_B: |
| rb = nibs[n] & 0x07; |
| break; |
| case SDT_REG_N: |
| /* sh-dsp: single data transfer. */ |
| rn = nibs[n]; |
| if ((rn & 0xc) != 4) |
| goto fail; |
| rn = rn & 0x3; |
| rn |= (!(rn & 2)) << 2; |
| break; |
| case PPI: |
| case REPEAT: |
| goto fail; |
| default: |
| abort (); |
| } |
| } |
| |
| ok: |
| fprintf_fn (stream, "%s\t", op->name); |
| disp_pc = 0; |
| for (n = 0; n < 3 && op->arg[n] != A_END; n++) |
| { |
| if (n && op->arg[1] != A_END) |
| fprintf_fn (stream, ","); |
| switch (op->arg[n]) |
| { |
| case A_IMM: |
| fprintf_fn (stream, "#%d", (char) (imm)); |
| break; |
| case A_R0: |
| fprintf_fn (stream, "r0"); |
| break; |
| case A_REG_N: |
| fprintf_fn (stream, "r%d", rn); |
| break; |
| case A_INC_N: |
| fprintf_fn (stream, "@r%d+", rn); |
| break; |
| case A_DEC_N: |
| fprintf_fn (stream, "@-r%d", rn); |
| break; |
| case A_IND_N: |
| fprintf_fn (stream, "@r%d", rn); |
| break; |
| case A_DISP_REG_N: |
| fprintf_fn (stream, "@(%d,r%d)", imm, rn); |
| break; |
| case A_PMOD_N: |
| fprintf_fn (stream, "@r%d+r8", rn); |
| break; |
| case A_REG_M: |
| fprintf_fn (stream, "r%d", rm); |
| break; |
| case A_INC_M: |
| fprintf_fn (stream, "@r%d+", rm); |
| break; |
| case A_DEC_M: |
| fprintf_fn (stream, "@-r%d", rm); |
| break; |
| case A_IND_M: |
| fprintf_fn (stream, "@r%d", rm); |
| break; |
| case A_DISP_REG_M: |
| fprintf_fn (stream, "@(%d,r%d)", imm, rm); |
| break; |
| case A_REG_B: |
| fprintf_fn (stream, "r%d_bank", rb); |
| break; |
| case A_DISP_PC: |
| disp_pc = 1; |
| disp_pc_addr = imm + 4 + (memaddr & relmask); |
| (*info->print_address_func) (disp_pc_addr, info); |
| break; |
| case A_IND_R0_REG_N: |
| fprintf_fn (stream, "@(r0,r%d)", rn); |
| break; |
| case A_IND_R0_REG_M: |
| fprintf_fn (stream, "@(r0,r%d)", rm); |
| break; |
| case A_DISP_GBR: |
| fprintf_fn (stream, "@(%d,gbr)", imm); |
| break; |
| case A_R0_GBR: |
| fprintf_fn (stream, "@(r0,gbr)"); |
| break; |
| case A_BDISP12: |
| case A_BDISP8: |
| (*info->print_address_func) (imm + memaddr, info); |
| break; |
| case A_SR: |
| fprintf_fn (stream, "sr"); |
| break; |
| case A_GBR: |
| fprintf_fn (stream, "gbr"); |
| break; |
| case A_VBR: |
| fprintf_fn (stream, "vbr"); |
| break; |
| case A_DSR: |
| fprintf_fn (stream, "dsr"); |
| break; |
| case A_MOD: |
| fprintf_fn (stream, "mod"); |
| break; |
| case A_RE: |
| fprintf_fn (stream, "re"); |
| break; |
| case A_RS: |
| fprintf_fn (stream, "rs"); |
| break; |
| case A_A0: |
| fprintf_fn (stream, "a0"); |
| break; |
| case A_X0: |
| fprintf_fn (stream, "x0"); |
| break; |
| case A_X1: |
| fprintf_fn (stream, "x1"); |
| break; |
| case A_Y0: |
| fprintf_fn (stream, "y0"); |
| break; |
| case A_Y1: |
| fprintf_fn (stream, "y1"); |
| break; |
| case DSP_REG_M: |
| print_dsp_reg (rm, fprintf_fn, stream); |
| break; |
| case A_SSR: |
| fprintf_fn (stream, "ssr"); |
| break; |
| case A_SPC: |
| fprintf_fn (stream, "spc"); |
| break; |
| case A_MACH: |
| fprintf_fn (stream, "mach"); |
| break; |
| case A_MACL: |
| fprintf_fn (stream, "macl"); |
| break; |
| case A_PR: |
| fprintf_fn (stream, "pr"); |
| break; |
| case A_SGR: |
| fprintf_fn (stream, "sgr"); |
| break; |
| case A_DBR: |
| fprintf_fn (stream, "dbr"); |
| break; |
| case F_REG_N: |
| fprintf_fn (stream, "fr%d", rn); |
| break; |
| case F_REG_M: |
| fprintf_fn (stream, "fr%d", rm); |
| break; |
| case DX_REG_N: |
| if (rn & 1) |
| { |
| fprintf_fn (stream, "xd%d", rn & ~1); |
| break; |
| } |
| case D_REG_N: |
| fprintf_fn (stream, "dr%d", rn); |
| break; |
| case DX_REG_M: |
| if (rm & 1) |
| { |
| fprintf_fn (stream, "xd%d", rm & ~1); |
| break; |
| } |
| case D_REG_M: |
| fprintf_fn (stream, "dr%d", rm); |
| break; |
| case FPSCR_M: |
| case FPSCR_N: |
| fprintf_fn (stream, "fpscr"); |
| break; |
| case FPUL_M: |
| case FPUL_N: |
| fprintf_fn (stream, "fpul"); |
| break; |
| case F_FR0: |
| fprintf_fn (stream, "fr0"); |
| break; |
| case V_REG_N: |
| fprintf_fn (stream, "fv%d", rn * 4); |
| break; |
| case V_REG_M: |
| fprintf_fn (stream, "fv%d", rm * 4); |
| break; |
| case XMTRX_M4: |
| fprintf_fn (stream, "xmtrx"); |
| break; |
| default: |
| abort (); |
| } |
| } |
| |
| #if 0 |
| /* This code prints instructions in delay slots on the same line |
| as the instruction which needs the delay slots. This can be |
| confusing, since other disassembler don't work this way, and |
| it means that the instructions are not all in a line. So I |
| disabled it. Ian. */ |
| if (!(info->flags & 1) |
| && (op->name[0] == 'j' |
| || (op->name[0] == 'b' |
| && (op->name[1] == 'r' |
| || op->name[1] == 's')) |
| || (op->name[0] == 'r' && op->name[1] == 't') |
| || (op->name[0] == 'b' && op->name[2] == '.'))) |
| { |
| info->flags |= 1; |
| fprintf_fn (stream, "\t(slot "); |
| print_insn_shx (memaddr + 2, info); |
| info->flags &= ~1; |
| fprintf_fn (stream, ")"); |
| return 4; |
| } |
| #endif |
| |
| if (disp_pc && strcmp (op->name, "mova") != 0) |
| { |
| int size; |
| bfd_byte bytes[4]; |
| |
| if (relmask == ~(bfd_vma) 1) |
| size = 2; |
| else |
| size = 4; |
| status = info->read_memory_func (disp_pc_addr, bytes, size, info); |
| if (status == 0) |
| { |
| unsigned int val; |
| |
| if (size == 2) |
| { |
| if ((info->flags & LITTLE_BIT) != 0) |
| val = bfd_getl16 (bytes); |
| else |
| val = bfd_getb16 (bytes); |
| } |
| else |
| { |
| if ((info->flags & LITTLE_BIT) != 0) |
| val = bfd_getl32 (bytes); |
| else |
| val = bfd_getb32 (bytes); |
| } |
| fprintf_fn (stream, "\t! 0x%x", val); |
| } |
| } |
| |
| return 2; |
| fail: |
| ; |
| |
| } |
| fprintf_fn (stream, ".word 0x%x%x%x%x", nibs[0], nibs[1], nibs[2], nibs[3]); |
| return 2; |
| } |
| |
| int |
| print_insn_shl (memaddr, info) |
| bfd_vma memaddr; |
| struct disassemble_info *info; |
| { |
| int r; |
| |
| info->flags = LITTLE_BIT; |
| r = print_insn_shx (memaddr, info); |
| return r; |
| } |
| |
| int |
| print_insn_sh (memaddr, info) |
| bfd_vma memaddr; |
| struct disassemble_info *info; |
| { |
| int r; |
| |
| info->flags = 0; |
| r = print_insn_shx (memaddr, info); |
| return r; |
| } |
