-/* Print SPARC instructions for GDB, the GNU Debugger.
- Copyright 1989, 1991 Free Software Foundation, Inc.
+/* Print sparc instructions for GDB, the GNU debugger.
+ Copyright 1986, 1987, 1989, 1991, 1992, 1993 Free Software Foundation, Inc.
-This file is part of GDB, the GNU disassembler.
+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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
-
#include "defs.h"
-#include "symtab.h"
-#include "opcode/sparc.h"
-#include "gdbcore.h"
-#include "string.h"
-#include "target.h"
-
-extern char *reg_names[];
-#define freg_names (®_names[4 * 8])
-
-union sparc_insn
- {
- unsigned long int code;
- struct
- {
- unsigned int anop:2;
-#define op ldst.anop
- unsigned int anrd:5;
-#define rd ldst.anrd
- unsigned int op3:6;
- unsigned int anrs1:5;
-#define rs1 ldst.anrs1
- unsigned int i:1;
- unsigned int anasi:8;
-#define asi ldst.anasi
- unsigned int anrs2:5;
-#define rs2 ldst.anrs2
-#define shcnt rs2
- } ldst;
- struct
- {
- unsigned int anop:2, anrd:5, op3:6, anrs1:5, i:1;
- unsigned int IMM13:13;
-#define imm13 IMM13.IMM13
- } IMM13;
- struct
- {
- unsigned int anop:2;
- unsigned int a:1;
- unsigned int cond:4;
- unsigned int op2:3;
- unsigned int DISP22:22;
-#define disp22 branch.DISP22
- } branch;
-#define imm22 disp22
- struct
- {
- unsigned int anop:2;
- unsigned int adisp30:30;
-#define disp30 call.adisp30
- } call;
- };
+#include "dis-asm.h"
-/* Nonzero if INSN is the opcode for a delayed branch. */
-static int
-is_delayed_branch (insn)
- union sparc_insn insn;
-{
- unsigned int i;
-
- for (i = 0; i < NUMOPCODES; ++i)
- {
- const struct sparc_opcode *opcode = &sparc_opcodes[i];
- if ((opcode->match & insn.code) == opcode->match
- && (opcode->lose & insn.code) == 0)
- return (opcode->flags & F_DELAYED);
- }
- return 0;
-}
+/* Print the instruction at address MEMADDR in debugged memory,
+ on STREAM. Returns length of the instruction, in bytes. */
-/* Print one instruction from MEMADDR on STREAM. */
int
print_insn (memaddr, stream)
CORE_ADDR memaddr;
- FILE *stream;
+ GDB_FILE *stream;
{
- union sparc_insn insn;
-
- register unsigned int i;
-
- read_memory (memaddr, &insn, sizeof (insn));
-
- for (i = 0; i < NUMOPCODES; ++i)
- {
- const struct sparc_opcode *opcode = &sparc_opcodes[i];
- if ((opcode->match & insn.code) == opcode->match
- && (opcode->lose & insn.code) == 0)
- {
- /* Nonzero means that we have found an instruction which has
- the effect of adding or or'ing the imm13 field to rs1. */
- int imm_added_to_rs1 = 0;
-
- /* Nonzero means that we have found a plus sign in the args
- field of the opcode table. */
- int found_plus = 0;
-
- /* Do we have an 'or' instruction where rs1 is the same
- as rsd, and which has the i bit set? */
- if (opcode->match == 0x80102000
- && insn.rs1 == insn.rd)
- imm_added_to_rs1 = 1;
-
- if (insn.rs1 != insn.rd
- && strchr (opcode->args, 'r') != 0)
- /* Can't do simple format if source and dest are different. */
- continue;
-
- fputs_filtered (opcode->name, stream);
-
- {
- register const char *s;
-
- if (opcode->args[0] != ',')
- fputs_filtered (" ", stream);
- for (s = opcode->args; *s != '\0'; ++s)
- {
- if (*s == ',')
- {
- fputs_filtered (",", stream);
- ++s;
- if (*s == 'a')
- {
- fputs_filtered ("a", stream);
- ++s;
- }
- fputs_filtered (" ", stream);
- }
-
- switch (*s)
- {
- case '+':
- found_plus = 1;
-
- /* note fall-through */
- default:
- fprintf_filtered (stream, "%c", *s);
- break;
-
- case '#':
- fputs_filtered ("0", stream);
- break;
-
-#define reg(n) fprintf_filtered (stream, "%%%s", reg_names[n])
- case '1':
- case 'r':
- reg (insn.rs1);
- break;
-
- case '2':
- reg (insn.rs2);
- break;
-
- case 'd':
- reg (insn.rd);
- break;
-#undef reg
-
-#define freg(n) fprintf_filtered (stream, "%%%s", freg_names[n])
- case 'e':
- freg (insn.rs1);
- break;
-
- case 'f':
- freg (insn.rs2);
- break;
-
- case 'g':
- freg (insn.rd);
- break;
-#undef freg
-
-#define creg(n) fprintf_filtered (stream, "%%c%u", (unsigned int) (n))
- case 'b':
- creg (insn.rs1);
- break;
-
- case 'c':
- creg (insn.rs2);
- break;
-
- case 'D':
- creg (insn.rd);
- break;
-#undef creg
-
- case 'h':
- fprintf_filtered (stream, "%%hi(%#x)",
- (int) insn.imm22 << 10);
- break;
-
- case 'i':
- {
- /* We cannot trust the compiler to sign-extend
- when extracting the bitfield, hence the shifts. */
- int imm = ((int) insn.imm13 << 19) >> 19;
-
- /* Check to see whether we have a 1+i, and take
- note of that fact.
-
- FIXME: No longer true/relavant ???
- Note: because of the way we sort the table,
- we will be matching 1+i rather than i+1,
- so it is OK to assume that i is after +,
- not before it. */
- if (found_plus)
- imm_added_to_rs1 = 1;
-
- if (imm <= 9)
- fprintf_filtered (stream, "%d", imm);
- else
- fprintf_filtered (stream, "%#x", imm);
- }
- break;
-
- case 'L':
- print_address ((CORE_ADDR) memaddr + insn.disp30 * 4,
- stream);
- break;
-
- case 'l':
- if ((insn.code >> 22) == 0)
- /* Special case for `unimp'. Don't try to turn
- it's operand into a function offset. */
- fprintf_filtered (stream, "%#x",
- (int) (((int) insn.disp22 << 10) >> 10));
- else
- /* We cannot trust the compiler to sign-extend
- when extracting the bitfield, hence the shifts. */
- print_address ((CORE_ADDR)
- (memaddr
- + (((int) insn.disp22 << 10) >> 10) * 4),
- stream);
- break;
-
- case 'A':
- fprintf_filtered (stream, "(%d)", (int) insn.asi);
- break;
-
- case 'C':
- fputs_filtered ("%csr", stream);
- break;
-
- case 'F':
- fputs_filtered ("%fsr", stream);
- break;
-
- case 'p':
- fputs_filtered ("%psr", stream);
- break;
-
- case 'q':
- fputs_filtered ("%fq", stream);
- break;
-
- case 'Q':
- fputs_filtered ("%cq", stream);
- break;
-
- case 't':
- fputs_filtered ("%tbr", stream);
- break;
-
- case 'w':
- fputs_filtered ("%wim", stream);
- break;
-
- case 'y':
- fputs_filtered ("%y", stream);
- break;
- }
- }
- }
-
- /* If we are adding or or'ing something to rs1, then
- check to see whether the previous instruction was
- a sethi to the same register as in the sethi.
- If so, attempt to print the result of the add or
- or (in this context add and or do the same thing)
- and its symbolic value. */
- if (imm_added_to_rs1)
- {
- union sparc_insn prev_insn;
- int errcode;
-
- errcode = target_read_memory (memaddr - 4,
- (char *)&prev_insn, sizeof (prev_insn));
-
- if (errcode == 0)
- {
- /* If it is a delayed branch, we need to look at the
- instruction before the delayed branch. This handles
- sequences such as
-
- sethi %o1, %hi(_foo), %o1
- call _printf
- or %o1, %lo(_foo), %o1
- */
-
- if (is_delayed_branch (prev_insn))
- errcode = target_read_memory
- (memaddr - 8, (char *)&prev_insn, sizeof (prev_insn));
- }
-
- /* If there was a problem reading memory, then assume
- the previous instruction was not sethi. */
- if (errcode == 0)
- {
- /* Is it sethi to the same register? */
- if ((prev_insn.code & 0xc1c00000) == 0x01000000
- && prev_insn.rd == insn.rs1)
- {
- fprintf_filtered (stream, "\t! ");
- /* We cannot trust the compiler to sign-extend
- when extracting the bitfield, hence the shifts. */
- print_address (((int) prev_insn.imm22 << 10)
- | (insn.imm13 << 19) >> 19, stream);
- }
- }
- }
+ disassemble_info info;
- return sizeof (insn);
- }
- }
+ GDB_INIT_DISASSEMBLE_INFO(info, stream);
- printf_filtered ("%#8x", insn.code);
- return sizeof (insn);
+ return print_insn_sparc (memaddr, &info);
}