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Diffstat (limited to 'gdb/pyr-tdep.c')
| -rw-r--r-- | gdb/pyr-tdep.c | 452 |
1 files changed, 452 insertions, 0 deletions
diff --git a/gdb/pyr-tdep.c b/gdb/pyr-tdep.c new file mode 100644 index 0000000..85e9a07 --- /dev/null +++ b/gdb/pyr-tdep.c @@ -0,0 +1,452 @@ +/* Pyramid target-dependent code for GDB. + Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. + +This file is part of GDB. + +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 "defs.h" + +/*** Prettier register printing. ***/ + +/* Print registers in the same format as pyramid's dbx, adb, sdb. */ +pyr_print_registers(reg_buf, regnum) + long *reg_buf[]; +{ + register int regno; + int usp, ksp; + struct user u; + + for (regno = 0; regno < 16; regno++) { + printf_unfiltered/*_filtered*/ ("%6.6s: %8x %6.6s: %8x %6s: %8x %6s: %8x\n", + REGISTER_NAME (regno), reg_buf[regno], + REGISTER_NAME (regno+16), reg_buf[regno+16], + REGISTER_NAME (regno+32), reg_buf[regno+32], + REGISTER_NAME (regno+48), reg_buf[regno+48]); + } + usp = ptrace (3, inferior_pid, + (PTRACE_ARG3_TYPE) ((char *)&u.u_pcb.pcb_usp) - + ((char *)&u), 0); + ksp = ptrace (3, inferior_pid, + (PTRACE_ARG3_TYPE) ((char *)&u.u_pcb.pcb_ksp) - + ((char *)&u), 0); + printf_unfiltered/*_filtered*/ ("\n%6.6s: %8x %6.6s: %8x (%08x) %6.6s %8x\n", + REGISTER_NAME (CSP_REGNUM),reg_buf[CSP_REGNUM], + REGISTER_NAME (KSP_REGNUM), reg_buf[KSP_REGNUM], ksp, + "usp", usp); +} + +/* Print the register regnum, or all registers if regnum is -1. + fpregs is currently ignored. */ + +pyr_do_registers_info (regnum, fpregs) + int regnum; + int fpregs; +{ + /* On a pyr, we know a virtual register can always fit in an long. + Here (and elsewhere) we take advantage of that. Yuk. */ + long raw_regs[MAX_REGISTER_RAW_SIZE*NUM_REGS]; + register int i; + + for (i = 0 ; i < 64 ; i++) { + read_relative_register_raw_bytes(i, raw_regs+i); + } + if (regnum == -1) + pyr_print_registers (raw_regs, regnum); + else + for (i = 0; i < NUM_REGS; i++) + if (i == regnum) { + long val = raw_regs[i]; + + fputs_filtered (REGISTER_NAME (i), gdb_stdout); + printf_filtered(":"); + print_spaces_filtered (6 - strlen (REGISTER_NAME (i)), gdb_stdout); + if (val == 0) + printf_filtered ("0"); + else + printf_filtered ("%s %d", local_hex_string_custom(val,"08"), val); + printf_filtered("\n"); + } +} + +/*** Debugging editions of various macros from m-pyr.h ****/ + +CORE_ADDR frame_locals_address (frame) + struct frame_info *frame; +{ + register int addr = find_saved_register (frame,CFP_REGNUM); + register int result = read_memory_integer (addr, 4); +#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING + fprintf_unfiltered (gdb_stderr, + "\t[[..frame_locals:%8x, %s= %x @%x fcfp= %x foo= %x\n\t gr13=%x pr13=%x tr13=%x @%x]]\n", + frame->frame, + REGISTER_NAME (CFP_REGNUM), + result, addr, + frame->frame_cfp, (CFP_REGNUM), + + + read_register(13), read_register(29), read_register(61), + find_saved_register(frame, 61)); +#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */ + + /* FIXME: I thought read_register (CFP_REGNUM) should be the right answer; + or at least CFP_REGNUM relative to FRAME (ie, result). + There seems to be a bug in the way the innermost frame is set up. */ + + return ((frame->next) ? result: frame->frame_cfp); +} + +CORE_ADDR frame_args_addr (frame) + struct frame_info *frame; +{ + register int addr = find_saved_register (frame,CFP_REGNUM); + register int result = read_memory_integer (addr, 4); + +#ifdef PYRAMID_CONTROL_FRAME_DEBUGGING + fprintf_unfiltered (gdb_stderr, + "\t[[..frame_args:%8x, %s= %x @%x fcfp= %x r_r= %x\n\t gr13=%x pr13=%x tr13=%x @%x]]\n", + frame->frame, + REGISTER_NAME (CFP_REGNUM), + result, addr, + frame->frame_cfp, read_register(CFP_REGNUM), + + read_register(13), read_register(29), read_register(61), + find_saved_register(frame, 61)); +#endif /* PYRAMID_CONTROL_FRAME_DEBUGGING */ + + /* FIXME: I thought read_register (CFP_REGNUM) should be the right answer; + or at least CFP_REGNUM relative to FRAME (ie, result). + There seems to be a bug in the way the innermost frame is set up. */ + return ((frame->next) ? result: frame->frame_cfp); +} + +#include "symtab.h" +#include "opcode/pyr.h" +#include "gdbcore.h" + + +/* A couple of functions used for debugging frame-handling on + Pyramids. (The Pyramid-dependent handling of register values for + windowed registers is known to be buggy.) + + When debugging, these functions can supplant the normal definitions of some + of the macros in tm-pyramid.h The quantity of information produced + when these functions are used makes the gdb unusable as a + debugger for user programs. */ + +extern unsigned pyr_saved_pc(), pyr_frame_chain(); + +CORE_ADDR pyr_frame_chain(frame) + CORE_ADDR frame; +{ + int foo=frame - CONTROL_STACK_FRAME_SIZE; + /* printf_unfiltered ("...following chain from %x: got %x\n", frame, foo);*/ + return foo; +} + +CORE_ADDR pyr_saved_pc(frame) + CORE_ADDR frame; +{ + int foo=0; + foo = read_memory_integer (((CORE_ADDR)(frame))+60, 4); + printf_unfiltered ("..reading pc from frame 0x%0x+%d regs: got %0x\n", + frame, 60/4, foo); + return foo; +} + +/* Pyramid instructions are never longer than this many bytes. */ +#define MAXLEN 24 + +/* Number of elements in the opcode table. */ +/*const*/ static int nopcodes = (sizeof (pyr_opcodes) / sizeof( pyr_opcodes[0])); +#define NOPCODES (nopcodes) + +/* Let's be byte-independent so we can use this as a cross-assembler. */ + +#define NEXTLONG(p) \ + (p += 4, (((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]) + +/* Print one instruction at address MEMADDR in debugged memory, + on STREAM. Returns length of the instruction, in bytes. */ + +int +pyr_print_insn (memaddr, stream) + CORE_ADDR memaddr; + GDB_FILE *stream; +{ + unsigned char buffer[MAXLEN]; + register int i, nargs, insn_size =4; + register unsigned char *p; + register char *d; + register int insn_opcode, operand_mode; + register int index_multiplier, index_reg_regno, op_1_regno, op_2_regno ; + long insn; /* first word of the insn, not broken down. */ + pyr_insn_format insn_decode; /* the same, broken out into op{code,erands} */ + long extra_1, extra_2; + + read_memory (memaddr, buffer, MAXLEN); + insn_decode = *((pyr_insn_format *) buffer); + insn = * ((int *) buffer); + insn_opcode = insn_decode.operator; + operand_mode = insn_decode.mode; + index_multiplier = insn_decode.index_scale; + index_reg_regno = insn_decode.index_reg; + op_1_regno = insn_decode.operand_1; + op_2_regno = insn_decode.operand_2; + + + if (*((int *)buffer) == 0x0) { + /* "halt" looks just like an invalid "jump" to the insn decoder, + so is dealt with as a special case */ + fprintf_unfiltered (stream, "halt"); + return (4); + } + + for (i = 0; i < NOPCODES; i++) + if (pyr_opcodes[i].datum.code == insn_opcode) + break; + + if (i == NOPCODES) + /* FIXME: Handle unrecognised instructions better. */ + fprintf_unfiltered (stream, "???\t#%08x\t(op=%x mode =%x)", + insn, insn_decode.operator, insn_decode.mode); + else + { + /* Print the mnemonic for the instruction. Pyramid insn operands + are so regular that we can deal with almost all of them + separately. + Unconditional branches are an exception: they are encoded as + conditional branches (branch if false condition, I think) + with no condition specified. The average user will not be + aware of this. To maintain their illusion that an + unconditional branch insn exists, we will have to FIXME to + treat the insn mnemnonic of all branch instructions here as a + special case: check the operands of branch insn and print an + appropriate mnemonic. */ + + fprintf_unfiltered (stream, "%s\t", pyr_opcodes[i].name); + + /* Print the operands of the insn (as specified in + insn.operand_mode). + Branch operands of branches are a special case: they are a word + offset, not a byte offset. */ + + if (insn_decode.operator == 0x01 || insn_decode.operator == 0x02) { + register int bit_codes=(insn >> 16)&0xf; + register int i; + register int displacement = (insn & 0x0000ffff) << 2; + + static char cc_bit_names[] = "cvzn"; /* z,n,c,v: strange order? */ + + /* Is bfc and no bits specified an unconditional branch?*/ + for (i=0;i<4;i++) { + if ((bit_codes) & 0x1) + fputc_unfiltered (cc_bit_names[i], stream); + bit_codes >>= 1; + } + + fprintf_unfiltered (stream, ",%0x", + displacement + memaddr); + return (insn_size); + } + + switch (operand_mode) { + case 0: + fprintf_unfiltered (stream, "%s,%s", + REGISTER_NAME (op_1_regno), + REGISTER_NAME (op_2_regno)); + break; + + case 1: + fprintf_unfiltered (stream, " 0x%0x,%s", + op_1_regno, + REGISTER_NAME (op_2_regno)); + break; + + case 2: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + fprintf_unfiltered (stream, " $0x%0x,%s", + extra_1, + REGISTER_NAME (op_2_regno)); + break; + case 3: + fprintf_unfiltered (stream, " (%s),%s", + REGISTER_NAME (op_1_regno), + REGISTER_NAME (op_2_regno)); + break; + + case 4: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + fprintf_unfiltered (stream, " 0x%0x(%s),%s", + extra_1, + REGISTER_NAME (op_1_regno), + REGISTER_NAME (op_2_regno)); + break; + + /* S1 destination mode */ + case 5: + fprintf_unfiltered (stream, + ((index_reg_regno) ? "%s,(%s)[%s*%1d]" : "%s,(%s)"), + REGISTER_NAME (op_1_regno), + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + + case 6: + fprintf_unfiltered (stream, + ((index_reg_regno) ? " $%#0x,(%s)[%s*%1d]" + : " $%#0x,(%s)"), + op_1_regno, + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + + case 7: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + fprintf_unfiltered (stream, + ((index_reg_regno) ? " $%#0x,(%s)[%s*%1d]" + : " $%#0x,(%s)"), + extra_1, + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + + case 8: + fprintf_unfiltered (stream, + ((index_reg_regno) ? " (%s),(%s)[%s*%1d]" : " (%s),(%s)"), + REGISTER_NAME (op_1_regno), + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + + case 9: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + fprintf_unfiltered (stream, + ((index_reg_regno) + ? "%#0x(%s),(%s)[%s*%1d]" + : "%#0x(%s),(%s)"), + extra_1, + REGISTER_NAME (op_1_regno), + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + + /* S2 destination mode */ + case 10: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + fprintf_unfiltered (stream, + ((index_reg_regno) ? "%s,%#0x(%s)[%s*%1d]" : "%s,%#0x(%s)"), + REGISTER_NAME (op_1_regno), + extra_1, + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + case 11: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + fprintf_unfiltered (stream, + ((index_reg_regno) ? + " $%#0x,%#0x(%s)[%s*%1d]" : " $%#0x,%#0x(%s)"), + op_1_regno, + extra_1, + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + case 12: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + read_memory (memaddr+8, buffer, MAXLEN); + insn_size += 4; + extra_2 = * ((int *) buffer); + fprintf_unfiltered (stream, + ((index_reg_regno) ? + " $%#0x,%#0x(%s)[%s*%1d]" : " $%#0x,%#0x(%s)"), + extra_1, + extra_2, + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + + case 13: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + fprintf_unfiltered (stream, + ((index_reg_regno) + ? " (%s),%#0x(%s)[%s*%1d]" + : " (%s),%#0x(%s)"), + REGISTER_NAME (op_1_regno), + extra_1, + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + case 14: + read_memory (memaddr+4, buffer, MAXLEN); + insn_size += 4; + extra_1 = * ((int *) buffer); + read_memory (memaddr+8, buffer, MAXLEN); + insn_size += 4; + extra_2 = * ((int *) buffer); + fprintf_unfiltered (stream, + ((index_reg_regno) ? "%#0x(%s),%#0x(%s)[%s*%1d]" + : "%#0x(%s),%#0x(%s) "), + extra_1, + REGISTER_NAME (op_1_regno), + extra_2, + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + break; + + default: + fprintf_unfiltered (stream, + ((index_reg_regno) ? "%s,%s [%s*%1d]" : "%s,%s"), + REGISTER_NAME (op_1_regno), + REGISTER_NAME (op_2_regno), + REGISTER_NAME (index_reg_regno), + index_multiplier); + fprintf_unfiltered (stream, + "\t\t# unknown mode in %08x", + insn); + break; + } /* switch */ + } + + { + return insn_size; + } + abort (); +} |