Re: [PATCH 02/13] elf-em.h: add EM_ARC

Alexey Brodkin
2018-11-09T14:21:01Z

Hi Dmitry,

On Fri, 2018-11-09 at 06:15 +0300, Dmitry V. Levin wrote:
> The uapi/linux/audit.h header is going to use EM_ARC in order
> to define AUDIT_ARCH_ARC which is needed to implement
> syscall_get_arch() which in turn is required to extend
> the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
>
> The value for EM_ARC has been taken from
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sco.com_developers_gabi_2012-2D12-2D31_ch4.eheader.html&d=DwICAg&c=DPL6_X_6JkXFx7AXWqB0tg&r=lqdeeSSEes0GFDDl656eViXO7breS55ytWkhpk5R81I&m=Xh7PO9ZcwtbHwzwugwhu0NZypO9ObM5zMkXiQ2ja-QI&s=23pqjp37UXKSxQC0AFzqBjPquJdrh_4FjSW00FLRf4k&e=
>
> Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
> ---
> include/uapi/linux/elf-em.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/include/uapi/linux/elf-em.h b/include/uapi/linux/elf-em.h
> index ba3696e3d694..56ff3f9d9633 100644
> --- a/include/uapi/linux/elf-em.h
> +++ b/
> @@ -26,6 +26,7 @@
> #define EM_ARM 40 /* ARM 32 bit */
> #define EM_SH 42 /* SuperH */
> #define EM_SPARCV9 43 /* SPARC v9 64-bit */
> +#define EM_ARC 45 /* Argonaut RISC Core */
> #define EM_H8_300 46 /* Renesas H8/300 */
> #define EM_IA_64 50 /* HP/Intel IA-64 */
> #define EM_X86_64 62 /* AMD x86-64 */

I guess we need to add ARCv2 here as well like that:
------------------------>8-----------------------
diff --git a/include/uapi/linux/elf-em.h b/include/uapi/linux/elf-em.h
index 31aa10178335..5c6c263d5c69 100644
--- a/include/uapi/linux/elf-em.h
+++ b/include/uapi/linux/elf-em.h
@@ -41,6 +41,7 @@
#define EM_TILEPRO 188 /* Tilera TILEPro */
#define EM_MICROBLAZE 189 /* Xilinx MicroBlaze */
#define EM_TILEGX 191 /* Tilera TILE-Gx */
+#define EM_ARCV2 195 /* Synopsys ARCv2 ISA */
#define EM_BPF 247 /* Linux BPF - in-kernel virtual machine */
#define EM_FRV 0x5441 /* Fujitsu FR-V */
------------------------>8-----------------------

See https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=include/elf/common.h;hb=HEAD#l309
Note though that we're moving from EM_ARC_COMPACT2 to EM_ARCV2 name
so it matches real ISA name. This is what we use in Glibc port we're
upstreaming now.

-Alexey