On 6/27/19 5:10 PM, Mitchell Horne wrote:
> Author: mhorne
> Date: Fri Jun 28 00:10:26 2019
> New Revision: 349482
> URL: https://svnweb.freebsd.org/changeset/base/349482
>
> Log:
> readelf: Add support for RISC-V specific e_flags
>
> Reviewed by: markj
> Approved by: markj (mentor)
> MFC after: 3 days
> Differential Revision: https://reviews.freebsd.org/D20767
>
> Modified:
> head/contrib/elftoolchain/common/elfdefinitions.h
> head/contrib/elftoolchain/readelf/readelf.c
>
> Modified: head/contrib/elftoolchain/common/elfdefinitions.h
> ==============================================================================
> --- head/contrib/elftoolchain/common/elfdefinitions.h Fri Jun 28 00:03:29
> 2019 (r349481)
> +++ head/contrib/elftoolchain/common/elfdefinitions.h Fri Jun 28 00:10:26
> 2019 (r349482)
> @@ -426,6 +426,22 @@ _ELF_DEFINE_EF(EF_PPC_RELOCATABLE, 0x00010000UL,
> \
> "-mrelocatable flag") \
> _ELF_DEFINE_EF(EF_PPC_RELOCATABLE_LIB, 0x00008000UL, \
> "-mrelocatable-lib flag") \
> +_ELF_DEFINE_EF(EF_RISCV_RVE, 0x00000008UL, \
> + "Compressed instruction ABI") \
I don't think this description for RVE is quite right. RVE is for RV32E which
is not using compressed ('C') instructions, but using a smaller register file
(16 GPRs instead of 32) which is in theory intended for embedded /
microprocessor
variants. The riscv-elf-psabi-doc describes it as:
EF_RISCV_RVE (0x0008): This bit is set when the binary targets the E ABI.
--
John Baldwin
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