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2922d21da1
We've decided to standardize on two flags for RISC-V: "-march" sets the
target architecture (which determines which instructions can be
generated), and "-mabi" sets the target ABI. We needed to rework this
because the old flag set didn't support soft-float or single-float ABIs,
and didn't support an x32-style ABI on RISC-V.
Additionally, we've changed the behavior of the -march flag: it's now a
lot stricter and only parses things we can actually understand.
Additionally, it's now lowercase-only: the rationale is that while the
RISC-V ISA manual specifies that ISA strings are case-insensitive, in
Linux-land things are usually case-sensitive. Since this flag can be
used to determine library paths, we didn't want to bake some
case-insensitivity in there that would case trouble later.
This patch implements these two new flags and removes the old flags that
could conflict with these. There wasn't a RISC-V release before, so we
want to just support a clean flag set.
include/
* elf/riscv.h (EF_RISCV_SOFT_FLOAT): Don't define.
(EF_RISCV_FLOAT_ABI, EF_RISCV_FLOAT_ABI_SOFT): Define.
(EF_RISCV_FLOAT_ABI_SINGLE, EF_RISCV_FLOAT_ABI_DOUBLE): Define.
(EF_RISCV_FLOAT_ABI_QUAD): Define.
bfd/
* elfnn-riscv.c (_bfd_riscv_elf_merge_private_bfd_data): Use
EF_RISCV_FLOAT_ABI_SOFT instead of EF_RISCV_SOFT_FLOAT.
binutils/
* readelf.c (get_machine_flags): Use
EF_RISCV_FLOAT_ABI_{SOFT,SINGLE,DOBULE,QUAD) instead of
EF_RISCV_{SOFT,HARD}_FLOAT.
gas/
* config/tc-riscv.h (xlen): Delete.
* config/tc-riscv.c (xlen): Make static.
(abi_xlen): New variable.
(options): Replace OPTION_{M32,M64,MSOFT_FLOAT,MHARD_FLOAT,MRVC}
with OPTION_MABI.
(md_longopts): Likewise.
(md_parse_option): Likewise.
(riscv_elf_final_processing): Likewise.
* doc/as.texinfo (Target RISC-V options): Likewise.
* doc/c-riscv.texi (OPTIONS): Likewise.
* config/tc-riscv.c (float_mode): Removed.
(float_abi): New type, specifies the floating-point ABI.
(riscv_set_abi): New function.
(riscv_add_subset): Only allow lower-case ISA names and require
them to start with "rv".
(riscv_after_parse_args): Likewise.
opcodes/
* riscv-dis.c (riscv_disassemble_insn): Default to the ELF's
XLEN when none is provided.
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| .. | ||
| aarch64.h | ||
| alpha.h | ||
| arc-reloc.def | ||
| arc.h | ||
| arm.h | ||
| avr.h | ||
| bfin.h | ||
| ChangeLog-0415 | ||
| ChangeLog-9103 | ||
| common.h | ||
| cr16.h | ||
| cr16c.h | ||
| cris.h | ||
| crx.h | ||
| d10v.h | ||
| d30v.h | ||
| dlx.h | ||
| dwarf.h | ||
| epiphany.h | ||
| external.h | ||
| fr30.h | ||
| frv.h | ||
| ft32.h | ||
| h8.h | ||
| hppa.h | ||
| i370.h | ||
| i386.h | ||
| i860.h | ||
| i960.h | ||
| ia64.h | ||
| internal.h | ||
| ip2k.h | ||
| iq2000.h | ||
| lm32.h | ||
| m32c.h | ||
| m32r.h | ||
| m68hc11.h | ||
| m68k.h | ||
| mcore.h | ||
| mep.h | ||
| metag.h | ||
| microblaze.h | ||
| mips.h | ||
| mmix.h | ||
| mn10200.h | ||
| mn10300.h | ||
| moxie.h | ||
| msp430.h | ||
| mt.h | ||
| nds32.h | ||
| nios2.h | ||
| or1k.h | ||
| pj.h | ||
| ppc.h | ||
| ppc64.h | ||
| reloc-macros.h | ||
| riscv.h | ||
| rl78.h | ||
| rx.h | ||
| s390.h | ||
| score.h | ||
| sh.h | ||
| sparc.h | ||
| spu.h | ||
| tic6x-attrs.h | ||
| tic6x.h | ||
| tilegx.h | ||
| tilepro.h | ||
| v850.h | ||
| vax.h | ||
| visium.h | ||
| vxworks.h | ||
| x86-64.h | ||
| xc16x.h | ||
| xgate.h | ||
| xstormy16.h | ||
| xtensa.h | ||