linux-kernel - Re: [PATCH V9 03/24] LoongArch: Add elf-related definitions

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Date:   Sun, 1 May 2022 22:27:47 +0800
From:   Huacai Chen <chenhuacai@...il.com>
To:     WANG Xuerui <kernel@...0n.name>
Cc:     Huacai Chen <chenhuacai@...ngson.cn>,
        Arnd Bergmann <arnd@...db.de>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Airlie <airlied@...ux.ie>,
        Jonathan Corbet <corbet@....net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        Yanteng Si <siyanteng@...ngson.cn>,
        Guo Ren <guoren@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: Re: [PATCH V9 03/24] LoongArch: Add elf-related definitions

Hi, Xuerui,

On Sun, May 1, 2022 at 5:41 PM WANG Xuerui <kernel@...0n.name> wrote:
>
> Hi,
>
> Commit message title could be "ELF" -- proper capitalization.
OK, thanks.

Huacai
>
> On 4/30/22 17:04, Huacai Chen wrote:
> > Add elf-related definitions for LoongArch, including: EM_LOONGARCH,
> > KEXEC_ARCH_LOONGARCH, AUDIT_ARCH_LOONGARCH32, AUDIT_ARCH_LOONGARCH64
> > and NT_LOONGARCH_*.
> >
> > Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
> > ---
> >   include/uapi/linux/audit.h  | 2 ++
> >   include/uapi/linux/elf-em.h | 1 +
> >   include/uapi/linux/elf.h    | 5 +++++
> >   include/uapi/linux/kexec.h  | 1 +
> >   scripts/sorttable.c         | 5 +++++
> >   5 files changed, 14 insertions(+)
> >
> > diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
> > index 8eda133ca4c1..7c1dc818b1d5 100644
> > --- a/include/uapi/linux/audit.h
> > +++ b/include/uapi/linux/audit.h
> > @@ -439,6 +439,8 @@ enum {
> >   #define AUDIT_ARCH_UNICORE  (EM_UNICORE|__AUDIT_ARCH_LE)
> >   #define AUDIT_ARCH_X86_64   (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
> >   #define AUDIT_ARCH_XTENSA   (EM_XTENSA)
> > +#define AUDIT_ARCH_LOONGARCH32       (EM_LOONGARCH|__AUDIT_ARCH_LE)
> > +#define AUDIT_ARCH_LOONGARCH64       (EM_LOONGARCH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
> >
> >   #define AUDIT_PERM_EXEC             1
> >   #define AUDIT_PERM_WRITE    2
> > diff --git a/include/uapi/linux/elf-em.h b/include/uapi/linux/elf-em.h
> > index f47e853546fa..ef38c2bc5ab7 100644
> > --- a/include/uapi/linux/elf-em.h
> > +++ b/include/uapi/linux/elf-em.h
> > @@ -51,6 +51,7 @@
> >   #define EM_RISCV    243     /* RISC-V */
> >   #define EM_BPF              247     /* Linux BPF - in-kernel virtual machine */
> >   #define EM_CSKY             252     /* C-SKY */
> > +#define EM_LOONGARCH 258     /* LoongArch */
> >   #define EM_FRV              0x5441  /* Fujitsu FR-V */
> >
> >   /*
> > diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
> > index 7ce993e6786c..1e0ae3f554f6 100644
> > --- a/include/uapi/linux/elf.h
> > +++ b/include/uapi/linux/elf.h
> > @@ -436,6 +436,11 @@ typedef struct elf64_shdr {
> >   #define NT_MIPS_DSP 0x800           /* MIPS DSP ASE registers */
> >   #define NT_MIPS_FP_MODE     0x801           /* MIPS floating-point mode */
> >   #define NT_MIPS_MSA 0x802           /* MIPS SIMD registers */
> > +#define NT_LOONGARCH_CPUCFG  0xa00   /* LoongArch CPU config registers */
> > +#define NT_LOONGARCH_CSR     0xa01   /* LoongArch control and status registers */
> > +#define NT_LOONGARCH_LSX     0xa02   /* LoongArch Loongson SIMD Extension registers */
> > +#define NT_LOONGARCH_LASX    0xa03   /* LoongArch Loongson Advanced SIMD Extension registers */
> > +#define NT_LOONGARCH_LBT     0xa04   /* LoongArch Loongson Binary Translation registers */
> These are named NT_LARCH_* in binutils source, better keep consistent?
> >
> >   /* Note types with note name "GNU" */
> >   #define NT_GNU_PROPERTY_TYPE_0      5
> > diff --git a/include/uapi/linux/kexec.h b/include/uapi/linux/kexec.h
> > index fb7e2ef60825..981016e05cfa 100644
> > --- a/include/uapi/linux/kexec.h
> > +++ b/include/uapi/linux/kexec.h
> > @@ -43,6 +43,7 @@
> >   #define KEXEC_ARCH_MIPS    ( 8 << 16)
> >   #define KEXEC_ARCH_AARCH64 (183 << 16)
> >   #define KEXEC_ARCH_RISCV   (243 << 16)
> > +#define KEXEC_ARCH_LOONGARCH (258 << 16)
> >
> >   /* The artificial cap on the number of segments passed to kexec_load. */
> >   #define KEXEC_SEGMENT_MAX 16
> > diff --git a/scripts/sorttable.c b/scripts/sorttable.c
> > index d00504c5f530..fba40e99f354 100644
> > --- a/scripts/sorttable.c
> > +++ b/scripts/sorttable.c
> > @@ -60,6 +60,10 @@
> >   #define EM_RISCV    243
> >   #endif
> >
> > +#ifndef EM_LOONGARCH
> > +#define EM_LOONGARCH 258
> > +#endif
> > +
> >   static uint32_t (*r)(const uint32_t *);
> >   static uint16_t (*r2)(const uint16_t *);
> >   static uint64_t (*r8)(const uint64_t *);
> > @@ -313,6 +317,7 @@ static int do_file(char const *const fname, void *addr)
> >       case EM_ARCOMPACT:
> >       case EM_ARCV2:
> >       case EM_ARM:
> > +     case EM_LOONGARCH:
> >       case EM_MICROBLAZE:
> >       case EM_MIPS:
> >       case EM_XTENSA: