diff options
Diffstat (limited to 'gdb/sparc-pinsn.c')
| -rw-r--r-- | gdb/sparc-pinsn.c | 190 |
1 files changed, 11 insertions, 179 deletions
diff --git a/gdb/sparc-pinsn.c b/gdb/sparc-pinsn.c index e7aba32..f7ba376 100644 --- a/gdb/sparc-pinsn.c +++ b/gdb/sparc-pinsn.c @@ -33,101 +33,6 @@ anyone else from sharing it farther. Help stamp out software hoarding! 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"}; @@ -256,12 +161,16 @@ print_insn (memaddr, stream) } else if (insn.arith.i) { + /* With explicit sign extension. */ fprintf (stream, "%s%s %s,0x%x,%s", - name, tmp, rs1, insn.arith_imm.simm, rd); + name, tmp, rs1, + (int) (insn.arith_imm.simm << 19) >> 19, + rd); if (last_sethi_target == insn.arith.rd) { fprintf (stream, "\t! "); - print_address (sethi_value + insn.arith_imm.simm); + print_address (sethi_value + + (int) (insn.arith_imm.simm << 19) >> 19); } } else @@ -287,7 +196,7 @@ print_insn (memaddr, stream) /* tagged add/sub insns and shift insns. */ if (insn.arith.i) { - int i = insn.arith_imm.simm; + int i = (int) (insn.arith_imm.simm << 19) >> 19; if (op > 4) /* Its a shift insn. */ i &= 31; @@ -363,7 +272,7 @@ print_insn (memaddr, stream) { fprintf (stream, "%s %s,0x%x,%s", rndop_ptr, rs1, - ((insn.arith_imm.simm << 19) >> 19), rd); + ((int) (insn.arith_imm.simm << 19) >> 19), rd); } else { @@ -437,7 +346,9 @@ fprint_addr1 (stream, name, insn) if (insn.arith.i) { fprintf (stream, "%s %s,0x%x,%s", - name, rs1, insn.arith_imm.simm, rd); + name, rs1, + (int) (insn.arith_imm.simm << 19) >> 19, + rd); } else { @@ -730,82 +641,3 @@ fprint_fpop (stream, insn, op, opcode) 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); -} |