diff options
Diffstat (limited to 'gdb/v850-tdep.c')
| -rw-r--r-- | gdb/v850-tdep.c | 307 |
1 files changed, 293 insertions, 14 deletions
diff --git a/gdb/v850-tdep.c b/gdb/v850-tdep.c index 0824724..b98a4bd 100644 --- a/gdb/v850-tdep.c +++ b/gdb/v850-tdep.c @@ -28,6 +28,36 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "gdbcore.h" #include "symfile.h" + +static char *v850_generic_reg_names[] = REGISTER_NAMES; + +static char *v850e_reg_names[] = +{ + "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", "r28", "r29", "r30", "r31", + "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7", + "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", + "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23", + "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31", + "pc", "fp" +}; + +char **v850_register_names = v850_generic_reg_names; + +struct +{ + char **regnames; + int mach; +} v850_processor_type_table[] = +{ + { v850_generic_reg_names, bfd_mach_v850 }, + { v850e_reg_names, bfd_mach_v850e }, + { v850e_reg_names, bfd_mach_v850ea }, + { NULL, 0 } +}; + /* Info gleaned from scanning a function's prologue. */ struct pifsr /* Info about one saved reg */ @@ -60,6 +90,189 @@ v850_use_struct_convention (gcc_p, type) } + +/* Structure for mapping bits in register lists to register numbers. */ +struct reg_list +{ + long mask; + int regno; +}; + +/* Helper function for v850_scan_prologue to handle prepare instruction. */ + +static void +handle_prepare (int insn, int insn2, CORE_ADDR *current_pc_ptr, + struct prologue_info *pi, struct pifsr **pifsr_ptr) + +{ + CORE_ADDR current_pc = *current_pc_ptr; + struct pifsr *pifsr = *pifsr_ptr; + long next = insn2 & 0xffff; + long list12 = ((insn & 1) << 16) + (next & 0xffe0); + long offset = (insn & 0x3e) << 1; + static struct reg_list reg_table [] = + { + { 0x00800, 20 }, /* r20 */ + { 0x00400, 21 }, /* r21 */ + { 0x00200, 22 }, /* r22 */ + { 0x00100, 23 }, /* r23 */ + { 0x08000, 24 }, /* r24 */ + { 0x04000, 25 }, /* r25 */ + { 0x02000, 26 }, /* r26 */ + { 0x01000, 27 }, /* r27 */ + { 0x00080, 28 }, /* r28 */ + { 0x00040, 29 }, /* r29 */ + { 0x10000, 30 }, /* ep */ + { 0x00020, 31 }, /* lp */ + { 0, 0 } /* end of table */ + }; + int i; + + if ((next & 0x1f) == 0x0b) /* skip imm16 argument */ + current_pc += 2; + else if ((next & 0x1f) == 0x13) /* skip imm16 argument */ + current_pc += 2; + else if ((next & 0x1f) == 0x1b) /* skip imm32 argument */ + current_pc += 4; + + /* Calculate the total size of the saved registers, and add it + it to the immediate value used to adjust SP. */ + for (i = 0; reg_table[i].mask != 0; i++) + if (list12 & reg_table[i].mask) + offset += REGISTER_RAW_SIZE (regtable[i].regno); + pi->frameoffset -= offset; + + /* Calculate the offsets of the registers relative to the value + the SP will have after the registers have been pushed and the + imm5 value has been subtracted from it. */ + if (pifsr) + { + for (i = 0; reg_table[i].mask != 0; i++) + { + if (list12 & reg_table[i].mask) + { + int reg = reg_table[i].regno; + offset -= REGISTER_RAW_SIZE (reg); + pifsr->reg = reg; + pifsr->offset = offset; + pifsr->cur_frameoffset = pi->frameoffset; + #ifdef DEBUG + printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); + #endif + pifsr++; + } + } + } +#ifdef DEBUG + printf_filtered ("\tfound ctret after regsave func"); +#endif + + /* Set result parameters. */ + *current_pc_ptr = current_pc; + *pifsr_ptr = pifsr; +} + + +/* Helper function for v850_scan_prologue to handle pushm/pushl instructions. + FIXME: the SR bit of the register list is not supported; must check + that the compiler does not ever generate this bit. */ + +static void +handle_pushm (int insn, int insn2, struct prologue_info *pi, + struct pifsr **pifsr_ptr) + +{ + struct pifsr *pifsr = *pifsr_ptr; + long list12 = ((insn & 0x0f) << 16) + (insn2 & 0xfff0); + long offset = 0; + static struct reg_list pushml_reg_table [] = + { + { 0x80000, PS_REGNUM }, /* PSW */ + { 0x40000, 1 }, /* r1 */ + { 0x20000, 2 }, /* r2 */ + { 0x10000, 3 }, /* r3 */ + { 0x00800, 4 }, /* r4 */ + { 0x00400, 5 }, /* r5 */ + { 0x00200, 6 }, /* r6 */ + { 0x00100, 7 }, /* r7 */ + { 0x08000, 8 }, /* r8 */ + { 0x04000, 9 }, /* r9 */ + { 0x02000, 10 }, /* r10 */ + { 0x01000, 11 }, /* r11 */ + { 0x00080, 12 }, /* r12 */ + { 0x00040, 13 }, /* r13 */ + { 0x00020, 14 }, /* r14 */ + { 0x00010, 15 }, /* r15 */ + { 0, 0 } /* end of table */ + }; + static struct reg_list pushmh_reg_table [] = + { + { 0x80000, 16 }, /* r16 */ + { 0x40000, 17 }, /* r17 */ + { 0x20000, 18 }, /* r18 */ + { 0x10000, 19 }, /* r19 */ + { 0x00800, 20 }, /* r20 */ + { 0x00400, 21 }, /* r21 */ + { 0x00200, 22 }, /* r22 */ + { 0x00100, 23 }, /* r23 */ + { 0x08000, 24 }, /* r24 */ + { 0x04000, 25 }, /* r25 */ + { 0x02000, 26 }, /* r26 */ + { 0x01000, 27 }, /* r27 */ + { 0x00080, 28 }, /* r28 */ + { 0x00040, 29 }, /* r29 */ + { 0x00010, 30 }, /* r30 */ + { 0x00020, 31 }, /* r31 */ + { 0, 0 } /* end of table */ + }; + struct reg_list *reg_table; + int i; + + /* Is this a pushml or a pushmh? */ + if ((insn2 & 7) == 1) + reg_table = pushml_reg_table; + else + reg_table = pushmh_reg_table; + + /* Calculate the total size of the saved registers, and add it + it to the immediate value used to adjust SP. */ + for (i = 0; reg_table[i].mask != 0; i++) + if (list12 & reg_table[i].mask) + offset += REGISTER_RAW_SIZE (regtable[i].regno); + pi->frameoffset -= offset; + + /* Calculate the offsets of the registers relative to the value + the SP will have after the registers have been pushed and the + imm5 value is subtracted from it. */ + if (pifsr) + { + for (i = 0; reg_table[i].mask != 0; i++) + { + if (list12 & reg_table[i].mask) + { + int reg = reg_table[i].regno; + offset -= REGISTER_RAW_SIZE (reg); + pifsr->reg = reg; + pifsr->offset = offset; + pifsr->cur_frameoffset = pi->frameoffset; + #ifdef DEBUG + printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); + #endif + pifsr++; + } + } + } +#ifdef DEBUG + printf_filtered ("\tfound ctret after regsave func"); +#endif + + /* Set result parameters. */ + *pifsr_ptr = pifsr; +} + + + + /* Function: scan_prologue Scan the prologue of the function that contains PC, and record what we find in PI. PI->fsr must be zeroed by the called. Returns the @@ -81,7 +294,6 @@ v850_scan_prologue (pc, pi) int reg; CORE_ADDR save_pc, save_end; int regsave_func_p; - int current_sp_size; int r12_tmp; /* First, figure out the bounds of the prologue so that we can limit the @@ -134,9 +346,9 @@ v850_scan_prologue (pc, pi) (long)func_addr, (long)prologue_end); #endif - for (current_pc = func_addr; current_pc < prologue_end; current_pc += 2) + for (current_pc = func_addr; current_pc < prologue_end; ) { - int insn; + int insn, insn2; #ifdef DEBUG printf_filtered ("0x%.8lx ", (long)current_pc); @@ -144,17 +356,23 @@ v850_scan_prologue (pc, pi) #endif insn = read_memory_unsigned_integer (current_pc, 2); + current_pc += 2; + if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */ + { + insn2 = read_memory_unsigned_integer (current_pc, 2); + current_pc += 2; + } if ((insn & 0xffc0) == ((10 << 11) | 0x0780) && !regsave_func_p) { /* jarl <func>,10 */ - long low_disp = read_memory_unsigned_integer (current_pc + 2, 2) & ~ (long) 1; + long low_disp = insn2 & ~ (long) 1; long disp = (((((insn & 0x3f) << 16) + low_disp) & ~ (long) 1) ^ 0x00200000) - 0x00200000; save_pc = current_pc; save_end = prologue_end; regsave_func_p = 1; - current_pc += disp - 2; + current_pc += disp - 4; prologue_end = (current_pc + (2 * 3) /* moves to/from ep */ + 4 /* addi <const>,sp,sp */ @@ -168,14 +386,55 @@ v850_scan_prologue (pc, pi) #endif continue; } + else if ((insn & 0xffc0) == 0x0200 && !regsave_func_p) + { /* callt <imm6> */ + long ctbp = read_register (CTBP_REGNUM); + long adr = ctbp + ((insn & 0x3f) << 1); + + save_pc = current_pc; + save_end = prologue_end; + regsave_func_p = 1; + current_pc = ctbp + (read_memory_unsigned_integer (adr, 2) & 0xffff); + prologue_end = (current_pc + + (2 * 3) /* prepare list2,imm5,sp/imm */ + + 4 /* ctret */ + + 20); /* slop area */ + +#ifdef DEBUG + printf_filtered ("\tfound callt, ctbp = 0x%.8lx, adr = %.8lx, new pc = 0x%.8lx\n", + ctbp, adr, (long)current_pc); +#endif + continue; + } + else if ((insn & 0xffc0) == 0x0780) /* prepare list2,imm5 */ + { + handle_prepare (insn, insn2, ¤t_pc, pi, &pifsr); + continue; + } + else if (insn == 0x07e0 && regsave_func_p && insn2 == 0x0144) + { /* ctret after processing register save function */ + current_pc = save_pc; + prologue_end = save_end; + regsave_func_p = 0; +#ifdef DEBUG + printf_filtered ("\tfound ctret after regsave func"); +#endif + continue; + } + else if ((insn & 0xfff0) == 0x07e0 && (insn2 & 5) == 1) + { /* pushml, pushmh */ + handle_pushm (insn, insn2, pi, &pifsr); + continue; + } else if ((insn & 0xffe0) == 0x0060 && regsave_func_p) { /* jmp after processing register save function */ - current_pc = save_pc + 2; + current_pc = save_pc; prologue_end = save_end; regsave_func_p = 0; #ifdef DEBUG printf_filtered ("\tfound jmp after regsave func"); #endif + continue; } else if ((insn & 0x07c0) == 0x0780 /* jarl or jr */ || (insn & 0xffe0) == 0x0060 /* jmp */ @@ -190,7 +449,7 @@ v850_scan_prologue (pc, pi) else if ((insn & 0xffe0) == ((SP_REGNUM << 11) | 0x0240)) /* add <imm>,sp */ pi->frameoffset += ((insn & 0x1f) ^ 0x10) - 0x10; else if (insn == ((SP_REGNUM << 11) | 0x0600 | SP_REGNUM)) /* addi <imm>,sp,sp */ - pi->frameoffset += read_memory_integer (current_pc + 2, 2); + pi->frameoffset += insn2; else if (insn == ((FP_RAW_REGNUM << 11) | 0x0000 | SP_REGNUM)) /* mov sp,fp */ { fp_used = 1; @@ -198,9 +457,9 @@ v850_scan_prologue (pc, pi) } else if (insn == ((R12_REGNUM << 11) | 0x0640 | R0_REGNUM)) /* movhi hi(const),r0,r12 */ - r12_tmp = read_memory_integer (current_pc + 2, 2) << 16; + r12_tmp = insn2 << 16; else if (insn == ((R12_REGNUM << 11) | 0x0620 | R12_REGNUM)) /* movea lo(const),r12,r12 */ - r12_tmp += read_memory_integer (current_pc + 2, 2); + r12_tmp += insn2; else if (insn == ((SP_REGNUM << 11) | 0x01c0 | R12_REGNUM) && r12_tmp) /* add r12,sp */ pi->frameoffset = r12_tmp; else if (insn == ((EP_REGNUM << 11) | 0x0000 | SP_REGNUM)) /* mov sp,ep */ @@ -216,7 +475,7 @@ v850_scan_prologue (pc, pi) || (reg >= SAVE3_START_REGNUM && reg <= SAVE3_END_REGNUM))) { pifsr->reg = reg; - pifsr->offset = read_memory_integer (current_pc + 2, 2) & ~1; + pifsr->offset = insn2 & ~1; pifsr->cur_frameoffset = pi->frameoffset; #ifdef DEBUG printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); @@ -240,9 +499,6 @@ v850_scan_prologue (pc, pi) pifsr++; } - if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */ - current_pc += 2; - #ifdef DEBUG printf_filtered ("\n"); #endif @@ -290,7 +546,6 @@ v850_init_extra_frame_info (fi) { struct prologue_info pi; struct pifsr pifsrs[NUM_REGS + 1], *pifsr; - int reg; if (fi->next) fi->pc = FRAME_SAVED_PC (fi->next); @@ -598,8 +853,32 @@ v850_fix_call_dummy (dummy, sp, fun, nargs, args, type, gcc_p) return 0; } +/* Change the register names based on the current machine type. */ + +static int +v850_target_architecture_hook (ap) + const bfd_arch_info_type *ap; +{ + int i, j; + + if (ap->arch != bfd_arch_v850) + return 0; + + for (i = 0; v850_processor_type_table[i].regnames != NULL; i++) + { + if (v850_processor_type_table[i].mach == ap->mach) + { + v850_register_names = v850_processor_type_table[i].regnames; + return 1; + } + } + + fatal ("Architecture `%s' unreconized", ap->printable_name); +} + void _initialize_v850_tdep () { tm_print_insn = print_insn_v850; + target_architecture_hook = v850_target_architecture_hook; } |