mirror of
https://github.com/espressif/binutils-gdb.git
synced 2025-06-17 07:53:51 +08:00
gdb-3.1
This commit is contained in:
gdb-3.1
@ -33,101 +33,6 @@ anyone else from sharing it farther. Help stamp out software hoarding!
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on STREAM. Returns length of the instruction, in bytes, which
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is always 4. */
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struct op1_fmt
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{
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unsigned op1 : 2;
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unsigned dummy : 30;
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};
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struct op2_fmt
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{
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unsigned dummy1 : 7;
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unsigned op2 : 3;
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unsigned dummy2 : 22;
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};
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struct op3_fmt
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{
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unsigned dummy1 : 7;
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unsigned op3 : 6;
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unsigned dummy2 : 19;
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};
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struct call_fmt
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{
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unsigned op : 2;
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unsigned disp : 30;
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};
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struct sethi_fmt
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{
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unsigned op : 2;
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unsigned rd : 5;
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unsigned op2 : 3;
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unsigned imm : 22;
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};
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struct branch_fmt
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{
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unsigned op : 2;
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unsigned a : 1;
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unsigned cond : 4;
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unsigned op2 : 3;
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unsigned disp : 22; /* this should really be signed. */
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};
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struct ldst_fmt
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{
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unsigned op : 2;
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unsigned rd : 5;
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unsigned op3 : 6;
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unsigned rs1 : 5;
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unsigned i : 1;
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unsigned asi : 8;
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unsigned rs2 : 5;
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};
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struct arith_imm_fmt
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{
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unsigned op : 2;
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unsigned rd : 5;
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unsigned op3 : 6;
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unsigned rs1 : 5;
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unsigned i : 1;
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unsigned simm : 13;
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};
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struct arith_fmt
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{
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unsigned op : 2;
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unsigned rd : 5;
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unsigned op3 : 6;
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unsigned rs1 : 5;
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unsigned i : 1;
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unsigned opf : 8;
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unsigned rs2 : 5;
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};
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union insn_fmt
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{
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struct op1_fmt op1;
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struct op2_fmt op2;
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struct op3_fmt op3;
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struct call_fmt call;
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struct sethi_fmt sethi;
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struct branch_fmt branch;
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struct ldst_fmt ldst;
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struct arith_imm_fmt arith_imm;
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struct arith_fmt arith;
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int intval;
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float floatval; /* ?? */
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};
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typedef enum
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{
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Error, not_branch, bicc, bicca, ba, baa, ticc, ta,
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} branch_type;
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static char *icc_name[] =
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{ "~", "eq", "le", "lt", "leu", "ltu", "neg", "vs",
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"", "ne", "gt", "ge", "gtu", "geu", "pos", "vc"};
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@ -256,12 +161,16 @@ print_insn (memaddr, stream)
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}
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else if (insn.arith.i)
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{
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/* With explicit sign extension. */
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fprintf (stream, "%s%s %s,0x%x,%s",
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name, tmp, rs1, insn.arith_imm.simm, rd);
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name, tmp, rs1,
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(int) (insn.arith_imm.simm << 19) >> 19,
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rd);
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if (last_sethi_target == insn.arith.rd)
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{
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fprintf (stream, "\t! ");
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print_address (sethi_value + insn.arith_imm.simm);
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print_address (sethi_value +
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(int) (insn.arith_imm.simm << 19) >> 19);
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}
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}
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else
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@ -287,7 +196,7 @@ print_insn (memaddr, stream)
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/* tagged add/sub insns and shift insns. */
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if (insn.arith.i)
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{
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int i = insn.arith_imm.simm;
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int i = (int) (insn.arith_imm.simm << 19) >> 19;
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if (op > 4)
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/* Its a shift insn. */
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i &= 31;
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@ -363,7 +272,7 @@ print_insn (memaddr, stream)
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{
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fprintf (stream, "%s %s,0x%x,%s",
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rndop_ptr, rs1,
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((insn.arith_imm.simm << 19) >> 19), rd);
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((int) (insn.arith_imm.simm << 19) >> 19), rd);
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}
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else
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{
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@ -437,7 +346,9 @@ fprint_addr1 (stream, name, insn)
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if (insn.arith.i)
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{
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fprintf (stream, "%s %s,0x%x,%s",
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name, rs1, insn.arith_imm.simm, rd);
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name, rs1,
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(int) (insn.arith_imm.simm << 19) >> 19,
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rd);
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}
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else
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{
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@ -730,82 +641,3 @@ fprint_fpop (stream, insn, op, opcode)
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fprintf (stream, "0x%08x (unimplemented fpop insn)", insn.intval);
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}
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/* Set *target if we find a branch */
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branch_type
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isabranch (addr, target)
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CORE_ADDR addr, *target;
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{
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union insn_fmt instr;
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branch_type val = not_branch;
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long offset; /* Must be signed for sign-extend */
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*target = 0;
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instr.intval = read_memory_integer (addr, 4);
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/* printf("intval = %x\n",instr.intval); */
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switch (instr.op1.op1)
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{
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case 0: /* Format 2 */
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switch(instr.op2.op2)
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{
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case 2: case 6: /* BICC & FBCC */
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if (instr.branch.cond == 8)
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val = instr.branch.a ? baa : ba;
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else
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val = instr.branch.a ? bicca : bicc;
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/* 22 bits, sign extended */
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offset = ((instr.branch.disp << 10) >> 10);
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*target = addr + offset;
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break;
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}
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break;
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}
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/*printf("isabranch ret: %d\n",val); */
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return val;
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}
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CORE_ADDR skip_prologue (pc)
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CORE_ADDR pc;
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{
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union
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{
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struct insn_fmt insn;
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int i;
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} x;
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int dest = -1;
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x.i = read_memory_integer (pc, 4);
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if (x.insn.sethi.op == 0 && x.insn.sethi.op2 == 4)
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{
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dest = x.insn.sethi.rd;
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pc += 4;
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x.i = read_memory_integer (pc, 4);
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}
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if (x.insn.arith_imm.op == 2 && x.insn.arith_imm.i == 1
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&& (x.insn.arith_imm.rd == 1 || x.insn.arith_imm.rd == dest))
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{
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pc += 4;
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x.i = read_memory_integer (pc, 4);
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}
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if (x.insn.arith.op == 2 && (x.insn.arith.op3 ^ 32) == 28)
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{
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pc += 4;
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}
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return pc;
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}
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CORE_ADDR
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frame_saved_pc (frame, next_frame)
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CORE_ADDR frame;
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CORE_ADDR next_frame;
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{
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CORE_ADDR prev_pc;
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if (next_frame)
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prev_pc = GET_RWINDOW_REG (next_frame, rw_in[7]);
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else if (frame)
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prev_pc = GET_RWINDOW_REG (read_register (SP_REGNUM), rw_in[7]);
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else
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error ("frame_saved_pc called without a frame");
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return PC_ADJUST (prev_pc);
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}
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