Unknown instructions are currently just dumped as .long 1234. On
S/390 we can do a bit better since the instruction length is encoded
in the opcode. That way also unknown instructions can be skipped
according to their real length. That way we can continue correctly
after that instruction. However, there are also some drawbacks with
that behavior when dumping data. So for now that behavior is only
enabled for text section but even there it might mess things up when
having a literal pool embedded in the code. Therefore I've left the
feature disabled by default and have added the -Minsnlength option to
enable it explicitely.
opcodes/ChangeLog:
2016-06-10 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* s390-dis.c (option_use_insn_len_bits_p): New file scope
variable.
(init_disasm): Handle new command line option "insnlength".
(print_s390_disassembler_options): Mention new option in help
output.
(print_insn_s390): Use the encoded insn length when dumping
unknown instructions.
- 32 128 bit vector registers (overlapping with the existing 16 64 bit
floating point registers)
- vector double instructions
- vector integer instructions
- scalar vector instructions (allowing to have more floating point
registers for scalar operations)
- vector string instructions
gas/ChangeLog:
* config/tc-s390.c (struct pd_reg): Remove.
(pre_defined_registers): Remove.
(REG_NAME_CNT): Remove.
(reg_name_search): Calculate the register number instead of doing
a lookup.
(register_name, tc_s390_regname_to_dw2regnum): Adopt to the new
reg_name_search signature.
(s390_parse_cpu): Support the new arch string z13.
(s390_insert_operand): Support for vector registers with the extra
field for the fifth bit of each vector register operand.
(md_gather_operand): Adjust to the new handling of optional
parameters.
* doc/as.texinfo: Document the z13 cpu string.
gas/testsuite/ChangeLog:
* gas/s390/esa-g5.d: Add a variant without the optional operand.
* gas/s390/esa-g5.s: Likewise.
* gas/s390/esa-z9-109.d: Likewise.
* gas/s390/esa-z9-109.s: Likewise.
* gas/s390/zarch-z9-109.d: Likewise.
* gas/s390/zarch-z9-109.s: Likewise.
* gas/s390/zarch-z10.d: For variants with a zero optional argument
it is not dumped by objdump anymore.
* gas/s390/zarch-zEC12.d: Likewise.
* gas/s390/zarch-z13.d: New file.
* gas/s390/zarch-z13.s: New file.
* gas/s390/s390.exp: Run the test for the z13 files.
include/opcode/ChangeLog:
* s390.h (s390_opcode_cpu_val): Add S390_OPCODE_Z13.
ld/testsuite/ChangeLog:
* ld-s390/tlsbin.dd: The nopr register operand is optional and not
printed if 0 anymore.
opcodes/ChangeLog:
* s390-dis.c (s390_extract_operand): Support vector register
operands.
(s390_print_insn_with_opcode): Support new operands types and add
new handling of optional operands.
* s390-mkopc.c (s390_opcode_mode_val, s390_opcode_cpu_val): Remove
and include opcode/s390.h instead.
(struct op_struct): New field `flags'.
(insertOpcode, insertExpandedMnemonic): New parameter `flags'.
(dumpTable): Dump flags.
(main): Parse flags from the s390-opc.txt file. Add z13 as cpu
string.
* s390-opc.c: Add new operands types, instruction formats, and
instruction masks.
(s390_opformats): Add new formats for .insn.
* s390-opc.txt: Add new instructions.
readability and also fixes some minor issues.
S/390: Split disassembler routine into smaller functions
S/390: Fix disassembler's treatment of signed/unsigned operands
S/390: Fix off-by-one error in disassembler initialization
S/390: Simplify opcode search loop in disassembler
S/390: Drop function pointer dereferences in disassembler
S/390: Various minor simplifications in disassembler
Currently the disassembler for s390 (by default) assumes that a 31-bit
binary was compiled in "ESA" mode -- and then only disassembles a
limited opcode set. The change upgrades the default to the full "zarch"
opcode set even for 31-bit binaries.
opcodes/
* s390-dis.c (init_disasm): Default to full 'zarch' opcode
availability even for 31-bit programs.
* s390-mkopc.c (s390_opcode_cpu_val): Add support for cpu type z9-109.
(main): Likewise.
* s390-opc.c (I32_16, U32_16, M_16): Add defines 32 bit immediates
and 4 bit optional masks.
(INSTR_RIL_RI, INSTR_RIL_RU, INSTR_RRF_M0RR, INSTR_RSE_CCRD,
INSTR_RSY_CCRD, INSTR_SSF_RRDRD): Add new instruction formats.
(MASK_RIL_RI, MASK_RIL_RU, MASK_RRF_M0RR, MASK_RSE_CCRD,
MASK_RSY_CCRD, MASK_SSF_RRDRD): Likewise.
(s390_opformats): Likewise.
* s390-opc.txt: Add new instructions for cpu type z9-109.
S390_OPCODE_ZARCH.
(print_insn_s390): Use new modes field of s390_opcodes.
* s390-mkopc.c (ARCHBITS_ESAONLY, ARCHBITS_ESA, ARCHBITS_ESAME): Remove.
(s390_opcode_mode_val, s390_opcode_cpu_val): New enums.
(struct op_struct): Remove archbits. Add mode_bits and min_cpu.
(insertOpcode): Replace archbits by min_cpu and mode_bits.
(dumpTable): Write mode_bits and min_cpu instead of archbits.
(main): Adapt to new format in s390-opcode.txt.
* s390-opc.c (s390_opformats): Replace archbits by min_cpu and
mode_bits.
* s390-opc.txt: Replace archbits by min_cpu and mode_bits.
Alan Modra
Andreas Krebbel
Andreas Arnez
Nick Clifton
Andreas Krebbel
Martin Schwidefsky
Andreas Jaeger
Kazu Hirata