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l---------[-rw-r--r--]gdb/pinsn.c812
1 files changed, 1 insertions, 811 deletions
diff --git a/gdb/pinsn.c b/gdb/pinsn.c
index e7aba32..b7ac88a 100644..120000
--- a/gdb/pinsn.c
+++ b/gdb/pinsn.c
@@ -1,811 +1 @@
-/* Print sparc instructions for GDB, the GNU debugger.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
- Contributed by Michael Tiemann (tiemann@mcc.com)
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
-
-#include <stdio.h>
-
-#include "defs.h"
-#include "param.h"
-#include "symtab.h"
-#include "sparc-opcode.h"
-
-/* sparc instructions are never longer than this many bytes. */
-#define MAXLEN 4
-
-/* Print the sparc instruction at address MEMADDR in debugged memory,
- on STREAM. Returns length of the instruction, in bytes, which
- is always 4. */
-
-struct op1_fmt
-{
- unsigned op1 : 2;
- unsigned dummy : 30;
-};
-
-struct op2_fmt
-{
- unsigned dummy1 : 7;
- unsigned op2 : 3;
- unsigned dummy2 : 22;
-};
-
-struct op3_fmt
-{
- unsigned dummy1 : 7;
- unsigned op3 : 6;
- unsigned dummy2 : 19;
-};
-
-struct call_fmt
-{
- unsigned op : 2;
- unsigned disp : 30;
-};
-
-struct sethi_fmt
-{
- unsigned op : 2;
- unsigned rd : 5;
- unsigned op2 : 3;
- unsigned imm : 22;
-};
-
-struct branch_fmt
-{
- unsigned op : 2;
- unsigned a : 1;
- unsigned cond : 4;
- unsigned op2 : 3;
- unsigned disp : 22; /* this should really be signed. */
-};
-
-struct ldst_fmt
-{
- unsigned op : 2;
- unsigned rd : 5;
- unsigned op3 : 6;
- unsigned rs1 : 5;
- unsigned i : 1;
- unsigned asi : 8;
- unsigned rs2 : 5;
-};
-
-struct arith_imm_fmt
-{
- unsigned op : 2;
- unsigned rd : 5;
- unsigned op3 : 6;
- unsigned rs1 : 5;
- unsigned i : 1;
- unsigned simm : 13;
-};
-
-struct arith_fmt
-{
- unsigned op : 2;
- unsigned rd : 5;
- unsigned op3 : 6;
- unsigned rs1 : 5;
- unsigned i : 1;
- unsigned opf : 8;
- unsigned rs2 : 5;
-};
-
-union insn_fmt
-{
- struct op1_fmt op1;
- struct op2_fmt op2;
- struct op3_fmt op3;
- struct call_fmt call;
- struct sethi_fmt sethi;
- struct branch_fmt branch;
- struct ldst_fmt ldst;
- struct arith_imm_fmt arith_imm;
- struct arith_fmt arith;
- int intval;
- float floatval; /* ?? */
-};
-
-typedef enum
-{
- Error, not_branch, bicc, bicca, ba, baa, ticc, ta,
-} branch_type;
-
-static char *icc_name[] =
-{ "~", "eq", "le", "lt", "leu", "ltu", "neg", "vs",
- "", "ne", "gt", "ge", "gtu", "geu", "pos", "vc"};
-
-static char *fcc_name[] =
-{ "~fb", "fbne", "fblg", "fbul", "fbl", "fbug", "fbg", "fbu",
- "fb", "fbe", "fbue", "fbge", "fbuge", "fble", "fbule", "fbo"};
-
-static char *ccc_name[] =
-{ "~cb", "cb123", "cb12", "cb13", "cb1", "cb23", "cb2", "cb3",
- "cb", "cb0", "cb03", "cb02", "cb023", "cb01", "cb013", "cb012"};
-
-static char *arith_name[] =
-{ "add", "and", "or", "xor", "sub", "andn", "orn", "xnor",
- "addx", 0, 0, 0, "subx", 0, 0, 0};
-
-static char *xarith_name[] =
-{ "taddcc", "tsubcc", "taddcctv", "tsubcctv", "mulscc", "sll", "srl", "sra"};
-
-static char *state_reg_name[] =
-{ "%y", "%psr", "%wim", "%tbr", 0, 0, 0, 0};
-
-static char *ldst_i_name[] =
-{ "ld", "ldub", "lduh", "ldd", "st", "stb", "sth", "std",
- 0, "ldsb", "ldsh", 0, 0, "ldstub", 0, "swap",
- "lda", "lduba", "lduha", "ldda", "sta", "stba", "stha", "stda",
- 0, "ldsba", "ldsha", 0, 0, "ldstuba", 0, "swapa"};
-
-static char *ldst_f_name[] =
-{ "ldf", "ldfsr", 0, "lddf", "stf", "stfsr", "stdfq", "stdf"};
-
-static char *ldst_c_name[] =
-{ "ldc", "ldcsr", 0, "lddc", "stc", "stcsr", "stdcq", "stdc"};
-
-static int this_sethi_target = -1;
-static int last_sethi_target = -1;
-static int sethi_value = 0;
-
-static void fprint_addr1 ();
-static void fprint_ldst ();
-static void fprint_f_ldst ();
-static void fprint_c_ldst ();
-static void fprint_fpop ();
-
-int
-print_insn (memaddr, stream)
- CORE_ADDR memaddr;
- FILE *stream;
-{
- union insn_fmt insn;
- int disp22;
-
- read_memory (memaddr, &insn, MAXLEN);
-
- this_sethi_target = -1;
- switch (insn.op1.op1)
- {
- case 1:
- /* CALL format. */
- fprintf (stream, "call ");
- print_address (memaddr + (insn.call.disp << 2), stream);
- break;
- case 0:
- /* Bicc, FBfcc, CBccc, SETHI format. */
- switch (insn.op2.op2)
- {
- case 0:
- fprintf (stream, "unimp");
- break;
- case 2:
- /* Bicc. */
- fprintf (stream, "b%s", icc_name[insn.branch.cond]);
- if (insn.branch.a) fprintf (stream, ",a ");
- else fprintf (stream, " ");
- disp22 = insn.branch.disp;
- disp22 = ((disp22 << 10) >> 10);
- print_address (memaddr + (disp22 << 2), stream);
- break;
- case 4:
- /* SETHI. */
- fprintf (stream, "sethi %%hi(0x%x),%s",
- insn.sethi.imm << 10, reg_names[insn.sethi.rd]);
- this_sethi_target = insn.sethi.rd;
- sethi_value = insn.sethi.imm << 12;
- break;
- case 6:
- /* FBdfcc. */
- fprintf (stream, "fb%s", fcc_name[insn.branch.cond]);
- if (insn.branch.a) fprintf (stream, ",a ");
- else fprintf (stream, " ");
- disp22 = insn.branch.disp;
- disp22 = ((disp22 << 10) >> 10);
- print_address (memaddr + (disp22 << 2), stream);
- break;
- case 7:
- /* CBccc. */
- fprintf (stream, "cb%s", ccc_name[insn.branch.cond]);
- if (insn.branch.a) fprintf (stream, ",a ");
- else fprintf (stream, " ");
- disp22 = insn.branch.disp;
- disp22 = ((disp22 << 10) >> 10);
- print_address (memaddr + (disp22 << 2), stream);
- break;
- default:
- fprintf (stream, "0x%x (illegal op2 format)", insn.intval);
- break;
- }
- break;
- case 2:
- {
- /* vaguely arithmetic insns. */
- char *rd = reg_names[insn.arith.rd];
- char *rs1 = reg_names[insn.arith.rs1];
-
- if (insn.op3.op3 <= 28)
- {
- /* Arithmetic insns, with a few unimplemented. */
- register int affect_cc = insn.op3.op3 & 16;
- char *name = arith_name[insn.op3.op3 ^ affect_cc];
- char *tmp = affect_cc ? "cc" : "";
-
- if (name == 0)
- {
- fprintf (stream, "0x%08x (unimplemented arithmetic insn)",
- insn.intval);
- }
- else if (insn.arith.i)
- {
- fprintf (stream, "%s%s %s,0x%x,%s",
- name, tmp, rs1, insn.arith_imm.simm, rd);
- if (last_sethi_target == insn.arith.rd)
- {
- fprintf (stream, "\t! ");
- print_address (sethi_value + insn.arith_imm.simm);
- }
- }
- else
- {
- fprintf (stream, "%s%s %s,%s,%s",
- name, tmp, rs1, reg_names[insn.arith.rs2], rd);
- }
- break;
- }
- if (insn.op3.op3 < 32)
- {
- fprintf (stream, "0x%08x (unimplemented arithmetic insn)",
- insn.intval);
- break;
- }
- else
- {
- int op = insn.op3.op3 ^ 32;
-
- if (op < 8)
- {
- char *name = xarith_name[op];
- /* tagged add/sub insns and shift insns. */
- if (insn.arith.i)
- {
- int i = insn.arith_imm.simm;
- if (op > 4)
- /* Its a shift insn. */
- i &= 31;
-
- fprintf (stream, "%s %s,0x%x,%s",
- name, rs1, i, rd);
- }
- else
- {
- fprintf (stream, "%s %s,%s,%s",
- name, rs1, reg_names[insn.arith.rs2], rd);
- }
- break;
- }
- if (op < 20)
- {
- /* read/write state registers. */
- char *sr = state_reg_name[op & 7];
- if (sr == 0)
- fprintf (stream, "0x%08x (unimplemented state register insn",
- insn.intval);
- else
- fprintf (stream, "%s %s,%s", op & 16 ? "wr" : "rd", sr, rd);
- break;
- }
- if (op < 22)
- {
- /* floating point insns. */
- int opcode = insn.arith.opf;
-
- fprint_fpop (stream, insn, op & 3, opcode);
- break;
- }
- if (op < 24)
- {
- /* coprocessor insns. */
- char *rs2 = reg_names[insn.arith.rs2];
- int opcode = insn.arith.opf;
-
- fprintf (stream, "cpop%d rs1=%s,rs2=%s,op=0x%x,rd=%s",
- op & 1, rs1, rs2, opcode, rd);
- break;
- }
-
- switch (op)
- {
- char *rndop_ptr;
-
- case 24:
- fprint_addr1 (stream, "jumpl", insn);
- break;
- case 25:
- fprint_addr1 (stream, "rett", insn);
- break;
- case 26:
- {
- char rndop_buf[32];
- sprintf (rndop_buf, "t%s", icc_name[insn.branch.cond]);
- fprint_addr1 (stream, rndop_buf, insn);
- }
- break;
- case 27:
- fprint_addr1 (stream, "iflush", insn);
- break;
-
- case 28:
- rndop_ptr = "save";
- case 29:
- if (op == 29)
- rndop_ptr = "restore";
-
- if (insn.arith.i)
- {
- fprintf (stream, "%s %s,0x%x,%s",
- rndop_ptr, rs1,
- ((insn.arith_imm.simm << 19) >> 19), rd);
- }
- else
- {
- fprintf (stream, "%s %s,%s,%s",
- rndop_ptr, rs1, reg_names[insn.arith.rs2], rd);
- }
- break;
- case 30:
- case 31:
- fprintf (stream, "0x%08x (unimplemented op3 insn)",
- insn.intval);
- break;
- }
- break;
- }
- }
- case 3:
- /* load and store insns. */
- {
- char *rd = reg_names[insn.arith.rd];
- char *rs1 = reg_names[insn.arith.rs1];
- int op = insn.arith.op3;
-
- if ((op & 32) == 0)
- {
- /* Integer ops. */
- fprint_ldst (stream, insn, op);
- break;
- }
- if ((op & 16) == 0)
- {
- /* Float ops. */
- op ^= 32;
- if (op <= 7)
- {
- fprint_f_ldst (stream, insn, op);
- }
- else
- fprintf (stream, "0x%08x (unimplemented float load/store insn)",
- insn.intval);
- }
- else
- {
- /* Coprocessor ops. */
- op ^= (32+16);
- if (op <= 7)
- {
- fprint_c_ldst (stream, insn, op);
- }
- else
- fprintf (stream, "0x%08x (unimplemented coprocessor load/store insn)",
- insn.intval);
- }
- break;
- }
- }
- return 4;
-}
-
-/* It would be nice if this routine could print out a symbolic address
- when appropriate. */
-static void
-fprint_addr1 (stream, name, insn)
- FILE *stream;
- char *name;
- union insn_fmt insn;
-{
- char *rs1 = reg_names[insn.arith.rs1];
- char *rd = reg_names[insn.arith.rd];
-
- if (insn.arith.i)
- {
- fprintf (stream, "%s %s,0x%x,%s",
- name, rs1, insn.arith_imm.simm, rd);
- }
- else
- {
- fprintf (stream, "%s %s,%s,%s",
- name, rs1, reg_names[insn.arith.rs2], rd);
- }
-}
-
-static void
-fprint_mem (stream, insn)
- FILE *stream;
- union insn_fmt insn;
-{
- char *reg_name = reg_names[insn.arith.rs1];
- if (insn.arith.i)
- {
- if (insn.arith_imm.simm == 0)
- fprintf (stream, "[%s]", reg_name);
- else if (insn.arith_imm.simm & 0x1000)
- fprintf (stream, "[%s-0x%x]", reg_name,
- - (insn.arith_imm.simm | 0xffffe000));
- else
- fprintf (stream, "[%s+0x%x]", reg_name, insn.arith_imm.simm);
- }
- else
- {
- if (insn.arith.rs2 == 0)
- fprintf (stream, "[%s]", reg_name);
- else
- fprintf (stream, "[%s,%s]", reg_names[insn.arith.rs2], reg_name);
- }
-}
-
-static void
-fprint_ldst (stream, insn, op)
- FILE *stream;
- union insn_fmt insn;
- int op;
-{
- char *name = ldst_i_name[op];
- char *rd = reg_names[insn.arith.rd];
-
- if (name)
- {
- if (name[0] == 's')
- {
- fprintf (stream, "%s %s,", name, rd);
- fprint_mem (stream, insn);
- }
- else
- {
- fprintf (stream, "%s ", name);
- fprint_mem (stream, insn);
- fprintf (stream, ",%s", rd);
- }
- }
- else
- fprintf (stream, "0x%08x (unimplemented load/store insn)", insn.intval);
-}
-
-static void
-fprint_f_ldst (stream, insn, op)
- FILE *stream;
- union insn_fmt insn;
- int op;
-{
- char *name = ldst_f_name[op];
- if (name)
- {
- char *rd = reg_names[insn.arith.rd + 32];
-
- if (name[0] == 's')
- {
- fprintf (stream, "%s %s,", name, rd);
- fprint_mem (stream, insn);
- }
- else
- {
- fprintf (stream, "%s ", name);
- fprint_mem (stream, insn);
- fprintf (stream, ",%s", rd);
- }
- }
- else
- fprintf (stream, "0x%08x (unimplemented float load/store insn)", insn.intval);
-}
-
-static void
-fprint_c_ldst (stream, insn, op)
- FILE *stream;
- union insn_fmt insn;
- int op;
-{
- char *name = ldst_c_name[op];
- if (name)
- {
- if (name[0] == 's')
- {
- fprintf (stream, "%s %%cpreg(%d),", name, insn.arith.rs1);
- fprint_mem (stream, insn);
- }
- else
- {
- fprintf (stream, "%s ");
- fprint_mem (stream, insn);
- fprintf (stream, ",%%cpreg(%d)", insn.arith.rd);
- }
- }
- else
- fprintf (stream, "0x%08x (unimplemented coprocessor load/store insn)",
- insn.intval);
-}
-
-static void
-fprint_fpop (stream, insn, op, opcode)
- FILE *stream;
- union insn_fmt insn;
- int op, opcode;
-{
- char *name;
- char *rs1, *rs2, *rd;
-
- switch (op)
- {
- case 0:
- rs2 = reg_names[insn.arith.rs2 + 32];
- rd = reg_names[insn.arith.rd + 32];
- if ((opcode ^ 0x2f) <= 0x2f)
- {
- switch (opcode)
- {
- case 0x1:
- name = "fmovs";
- break;
- case 0x5:
- name = "fnegs";
- break;
- case 0x9:
- name = "fabss";
- break;
- case 0x29:
- name = "fsqrts";
- break;
- case 0x2a:
- name = "fsqrtd";
- break;
- case 0x2b:
- name = "fsqrtx";
- break;
- }
- fprintf (stream, "%s %s,%s", name, rs2, rd);
- return;
- }
- if ((opcode ^ 0x5f) <= 0x5f)
- {
- rs1 = reg_names[insn.arith.rs1 + 32];
- switch (opcode)
- {
- case 0x41:
- name = "fadds";
- break;
- case 0x42:
- name = "faddd";
- break;
- case 0x43:
- name = "faddx";
- break;
- case 0x45:
- name = "fsubs";
- break;
- case 0x46:
- name = "fsubd";
- break;
- case 0x47:
- name = "fsubx";
- break;
- case 0x49:
- name = "fmuls";
- break;
- case 0x4a:
- name = "fmuld";
- break;
- case 0x4b:
- name = "fmulx";
- break;
- case 0x4d:
- name = "fdivs";
- break;
- case 0x4e:
- name = "fdivd";
- break;
- case 0x4f:
- name = "fdivx";
- break;
- default:
- goto unimplemented;
- }
- if ((opcode & 0x10) == 0)
- fprintf (stream, "%s %s,%s,%s", name, rs1, rs2, rd);
- else
- fprintf (stream, "%s %s,%s", name, rs1, rs2);
- return;
- }
- if ((opcode ^ 0xdf) <= 0xdf)
- {
- switch (opcode)
- {
- case 0xc4:
- name = "fitos";
- break;
- case 0xc8:
- name = "fitod";
- break;
- case 0xcc:
- name = "fitox";
- break;
- case 0xd1:
- name = "fstoi";
- break;
- case 0xd2:
- name = "fdtoi";
- break;
- case 0xd3:
- name = "fxtoi";
- break;
- case 0xc9:
- name = "fstod";
- break;
- case 0xcd:
- name = "fstox";
- break;
- case 0xc6:
- name = "fdtos";
- break;
- case 0xce:
- name = "fdtox";
- break;
- case 0xc7:
- name = "fxtos";
- break;
- case 0xcb:
- name = "fxtod";
- break;
- default:
- goto unimplemented;
- }
- fprintf (stream, "%s %s,%s", name, rs2, rd);
- return;
- }
- goto unimplemented;
-
- case 1:
- rs1 = reg_names[insn.arith.rs1 + 32];
- rs2 = reg_names[insn.arith.rs2 + 32];
- if ((opcode ^ 0x57) <= 0x57)
- {
- switch (opcode)
- {
- case 0x51:
- name = "fcmps";
- break;
- case 0x52:
- name = "fcmpd";
- break;
- case 0x53:
- name = "fcmpx";
- break;
- case 0x55:
- name = "fcmpes";
- break;
- case 0x56:
- name = "fcmped";
- break;
- case 0x57:
- name = "fcmpex";
- break;
- default:
- goto unimplemented;
- }
- fprintf (stream, "%s %s,%s", name, rs1, rs2);
- return;
- }
- else goto unimplemented;
-
- case 2:
- case 3:
- goto unimplemented;
- }
- unimplemented:
- fprintf (stream, "0x%08x (unimplemented fpop insn)", insn.intval);
-}
-
-/* Set *target if we find a branch */
-branch_type
-isabranch (addr, target)
- CORE_ADDR addr, *target;
-{
- union insn_fmt instr;
- branch_type val = not_branch;
- long offset; /* Must be signed for sign-extend */
-
- *target = 0;
- instr.intval = read_memory_integer (addr, 4);
- /* printf("intval = %x\n",instr.intval); */
- switch (instr.op1.op1)
- {
- case 0: /* Format 2 */
- switch(instr.op2.op2)
- {
- case 2: case 6: /* BICC & FBCC */
- if (instr.branch.cond == 8)
- val = instr.branch.a ? baa : ba;
- else
- val = instr.branch.a ? bicca : bicc;
- /* 22 bits, sign extended */
- offset = ((instr.branch.disp << 10) >> 10);
- *target = addr + offset;
- break;
- }
- break;
- }
- /*printf("isabranch ret: %d\n",val); */
- return val;
-}
-
-CORE_ADDR skip_prologue (pc)
- CORE_ADDR pc;
-{
- union
- {
- struct insn_fmt insn;
- int i;
- } x;
- int dest = -1;
-
- x.i = read_memory_integer (pc, 4);
- if (x.insn.sethi.op == 0 && x.insn.sethi.op2 == 4)
- {
- dest = x.insn.sethi.rd;
- pc += 4;
- x.i = read_memory_integer (pc, 4);
- }
- if (x.insn.arith_imm.op == 2 && x.insn.arith_imm.i == 1
- && (x.insn.arith_imm.rd == 1 || x.insn.arith_imm.rd == dest))
- {
- pc += 4;
- x.i = read_memory_integer (pc, 4);
- }
- if (x.insn.arith.op == 2 && (x.insn.arith.op3 ^ 32) == 28)
- {
- pc += 4;
- }
- return pc;
-}
-
-CORE_ADDR
-frame_saved_pc (frame, next_frame)
- CORE_ADDR frame;
- CORE_ADDR next_frame;
-{
- CORE_ADDR prev_pc;
-
- if (next_frame)
- prev_pc = GET_RWINDOW_REG (next_frame, rw_in[7]);
- else if (frame)
- prev_pc = GET_RWINDOW_REG (read_register (SP_REGNUM), rw_in[7]);
- else
- error ("frame_saved_pc called without a frame");
-
- return PC_ADJUST (prev_pc);
-}
+sparc-pinsn.c \ No newline at end of file
generated by cgit v1.1 at 2024-12-15 12:36:08 +0000