From: Hengqi Chen <hengqi.chen@gmail.com>
To: elfutils-devel@sourceware.org, Mark Wielaard <mark@klomp.org>
Subject: Re: [PATCH] Add support for LoongArch
Date: Mon, 12 Dec 2022 16:12:19 +0800 [thread overview]
Message-ID: <CAEyhmHSRGKKXpqkEPGMKogo1PRyYGpqaH_1gAf_=rrFFkWrBuA@mail.gmail.com> (raw)
In-Reply-To: <20221203134707.2197078-1-hengqi.chen@gmail.com>
Hi, Mark:
Any comments? Thanks.
With this patch, pahole is now able to convert dwarf to BTF on
LoongArch machine.
cheers,
--
Hengqi
On Sat, Dec 3, 2022 at 9:47 PM Hengqi Chen <hengqi.chen@gmail.com> wrote:
>
> This implements initial support for the LoongArch architecture.
>
> Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
> ---
> backends/ChangeLog | 7 ++++
> backends/Makefile.am | 7 +++-
> backends/loongarch_init.c | 50 ++++++++++++++++++++++
> backends/loongarch_reloc.def | 81 ++++++++++++++++++++++++++++++++++++
> backends/loongarch_symbol.c | 74 ++++++++++++++++++++++++++++++++
> libebl/ChangeLog | 4 ++
> libebl/eblopenbackend.c | 2 +
> src/ChangeLog | 4 ++
> src/elflint.c | 2 +-
> 9 files changed, 228 insertions(+), 3 deletions(-)
> create mode 100644 backends/loongarch_init.c
> create mode 100644 backends/loongarch_reloc.def
> create mode 100644 backends/loongarch_symbol.c
>
> diff --git a/backends/ChangeLog b/backends/ChangeLog
> index 5b0daffe..5813ddcc 100644
> --- a/backends/ChangeLog
> +++ b/backends/ChangeLog
> @@ -1,3 +1,10 @@
> +2022-12-02 Hengqi Chen <hengqi.chen@gmail.com>
> +
> + * Makefile.am (modules): Add loongarch.
> + * loongarch_init.c: New file.
> + * loongarch_reloc.def: New file.
> + * loongarch_symbol.c: New file.
> +
> 2022-08-09 Andreas Schwab <schwab@suse.de>
>
> * riscv_init.c (riscv_init): HOOK segment_type_name,
> diff --git a/backends/Makefile.am b/backends/Makefile.am
> index 9566377f..0824123d 100644
> --- a/backends/Makefile.am
> +++ b/backends/Makefile.am
> @@ -37,7 +37,7 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
> noinst_LIBRARIES = libebl_backends.a libebl_backends_pic.a
>
> modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \
> - m68k bpf riscv csky
> + m68k bpf riscv csky loongarch
>
> i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
> i386_retval.c i386_regs.c i386_auxv.c \
> @@ -96,11 +96,14 @@ riscv_SRCS = riscv_init.c riscv_symbol.c riscv_cfi.c riscv_regs.c \
> csky_SRCS = csky_attrs.c csky_init.c csky_symbol.c csky_cfi.c \
> csky_regs.c csky_initreg.c csky_corenote.c
>
> +loongarch_SRCS = loongarch_init.c loongarch_symbol.c
> +
> libebl_backends_a_SOURCES = $(i386_SRCS) $(sh_SRCS) $(x86_64_SRCS) \
> $(ia64_SRCS) $(alpha_SRCS) $(arm_SRCS) \
> $(aarch64_SRCS) $(sparc_SRCS) $(ppc_SRCS) \
> $(ppc64_SRCS) $(s390_SRCS) \
> - $(m68k_SRCS) $(bpf_SRCS) $(riscv_SRCS) $(csky_SRCS)
> + $(m68k_SRCS) $(bpf_SRCS) $(riscv_SRCS) $(csky_SRCS) \
> + $(loongarch_SRCS)
>
> libebl_backends_pic_a_SOURCES =
> am_libebl_backends_pic_a_OBJECTS = $(libebl_backends_a_SOURCES:.c=.os)
> diff --git a/backends/loongarch_init.c b/backends/loongarch_init.c
> new file mode 100644
> index 00000000..a8ed9e81
> --- /dev/null
> +++ b/backends/loongarch_init.c
> @@ -0,0 +1,50 @@
> +/* Initialization of LoongArch specific backend library.
> + Copyright (C) 2022 Hengqi Chen
> + This file is part of elfutils.
> +
> + This file is free software; you can redistribute it and/or modify
> + it under the terms of either
> +
> + * the GNU Lesser General Public License as published by the Free
> + Software Foundation; either version 3 of the License, or (at
> + your option) any later version
> +
> + or
> +
> + * the GNU General Public License as published by the Free
> + Software Foundation; either version 2 of the License, or (at
> + your option) any later version
> +
> + or both in parallel, as here.
> +
> + elfutils is distributed in the hope that it will be useful, but
> + WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + General Public License for more details.
> +
> + You should have received copies of the GNU General Public License and
> + the GNU Lesser General Public License along with this program. If
> + not, see <http://www.gnu.org/licenses/>. */
> +
> +#ifdef HAVE_CONFIG_H
> +# include <config.h>
> +#endif
> +
> +#define BACKEND loongarch_
> +#define RELOC_PREFIX R_LARCH_
> +#include "libebl_CPU.h"
> +
> +/* This defines the common reloc hooks based on loongarch_reloc.def. */
> +#include "common-reloc.c"
> +
> +
> +Ebl *
> +loongarch_init (Elf *elf __attribute__ ((unused)),
> + GElf_Half machine __attribute__ ((unused)),
> + Ebl *eh)
> +{
> + loongarch_init_reloc (eh);
> + HOOK (eh, reloc_simple_type);
> +
> + return eh;
> +}
> diff --git a/backends/loongarch_reloc.def b/backends/loongarch_reloc.def
> new file mode 100644
> index 00000000..dd4a6b6d
> --- /dev/null
> +++ b/backends/loongarch_reloc.def
> @@ -0,0 +1,81 @@
> +/* List the relocation types for LoongArch. -*- C -*-
> + This file is part of elfutils.
> +
> + This file is free software; you can redistribute it and/or modify
> + it under the terms of either
> +
> + * the GNU Lesser General Public License as published by the Free
> + Software Foundation; either version 3 of the License, or (at
> + your option) any later version
> +
> + or
> +
> + * the GNU General Public License as published by the Free
> + Software Foundation; either version 2 of the License, or (at
> + your option) any later version
> +
> + or both in parallel, as here.
> +
> + elfutils is distributed in the hope that it will be useful, but
> + WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + General Public License for more details.
> +
> + You should have received copies of the GNU General Public License and
> + the GNU Lesser General Public License along with this program. If
> + not, see <http://www.gnu.org/licenses/>. */
> +
> +/* NAME, REL|EXEC|DYN */
> +
> +RELOC_TYPE (NONE, EXEC|DYN)
> +RELOC_TYPE (32, REL|EXEC|DYN)
> +RELOC_TYPE (64, REL|EXEC|DYN)
> +RELOC_TYPE (RELATIVE, EXEC|DYN)
> +RELOC_TYPE (COPY, EXEC|DYN)
> +RELOC_TYPE (JUMP_SLOT, EXEC|DYN)
> +RELOC_TYPE (TLS_DTPMOD32, EXEC|DYN)
> +RELOC_TYPE (TLS_DTPMOD64, EXEC|DYN)
> +RELOC_TYPE (TLS_DTPREL32, EXEC|DYN)
> +RELOC_TYPE (TLS_DTPREL64, EXEC|DYN)
> +RELOC_TYPE (TLS_TPREL32, EXEC|DYN)
> +RELOC_TYPE (TLS_TPREL64, EXEC|DYN)
> +RELOC_TYPE (IRELATIVE, EXEC|DYN)
> +RELOC_TYPE (MARK_LA, REL)
> +RELOC_TYPE (MARK_PCREL, REL)
> +RELOC_TYPE (SOP_PUSH_PCREL, REL)
> +RELOC_TYPE (SOP_PUSH_ABSOLUTE, REL)
> +RELOC_TYPE (SOP_PUSH_DUP, REL)
> +RELOC_TYPE (SOP_PUSH_GPREL, REL)
> +RELOC_TYPE (SOP_PUSH_TLS_TPREL, REL)
> +RELOC_TYPE (SOP_PUSH_TLS_GOT, REL)
> +RELOC_TYPE (SOP_PUSH_TLS_GD, REL)
> +RELOC_TYPE (SOP_PUSH_PLT_PCREL, REL)
> +RELOC_TYPE (SOP_ASSERT, REL)
> +RELOC_TYPE (SOP_NOT, REL)
> +RELOC_TYPE (SOP_SUB, REL)
> +RELOC_TYPE (SOP_SL, REL)
> +RELOC_TYPE (SOP_SR, REL)
> +RELOC_TYPE (SOP_ADD, REL)
> +RELOC_TYPE (SOP_AND, REL)
> +RELOC_TYPE (SOP_IF_ELSE, REL)
> +RELOC_TYPE (SOP_POP_32_S_10_5, REL)
> +RELOC_TYPE (SOP_POP_32_U_10_12, REL)
> +RELOC_TYPE (SOP_POP_32_S_10_12, REL)
> +RELOC_TYPE (SOP_POP_32_S_10_16, REL)
> +RELOC_TYPE (SOP_POP_32_S_10_16_S2, REL)
> +RELOC_TYPE (SOP_POP_32_S_5_20, REL)
> +RELOC_TYPE (SOP_POP_32_S_0_5_10_16_S2, REL)
> +RELOC_TYPE (SOP_POP_32_S_0_10_10_16_S2, REL)
> +RELOC_TYPE (SOP_POP_32_U, REL)
> +RELOC_TYPE (ADD8, REL)
> +RELOC_TYPE (ADD16, REL)
> +RELOC_TYPE (ADD24, REL)
> +RELOC_TYPE (ADD32, REL)
> +RELOC_TYPE (ADD64, REL)
> +RELOC_TYPE (SUB8, REL)
> +RELOC_TYPE (SUB16, REL)
> +RELOC_TYPE (SUB24, REL)
> +RELOC_TYPE (SUB32, REL)
> +RELOC_TYPE (SUB64, REL)
> +RELOC_TYPE (GNU_VTINHERIT, REL)
> +RELOC_TYPE (GNU_VTENTRY, REL)
> diff --git a/backends/loongarch_symbol.c b/backends/loongarch_symbol.c
> new file mode 100644
> index 00000000..8ba66a09
> --- /dev/null
> +++ b/backends/loongarch_symbol.c
> @@ -0,0 +1,74 @@
> +/* LoongArch specific symbolic name handling.
> + Copyright (C) 2022 Hengqi Chen
> + This file is part of elfutils.
> +
> + This file is free software; you can redistribute it and/or modify
> + it under the terms of either
> +
> + * the GNU Lesser General Public License as published by the Free
> + Software Foundation; either version 3 of the License, or (at
> + your option) any later version
> +
> + or
> +
> + * the GNU General Public License as published by the Free
> + Software Foundation; either version 2 of the License, or (at
> + your option) any later version
> +
> + or both in parallel, as here.
> +
> + elfutils is distributed in the hope that it will be useful, but
> + WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + General Public License for more details.
> +
> + You should have received copies of the GNU General Public License and
> + the GNU Lesser General Public License along with this program. If
> + not, see <http://www.gnu.org/licenses/>. */
> +
> +#ifdef HAVE_CONFIG_H
> +# include <config.h>
> +#endif
> +
> +#include <assert.h>
> +#include <elf.h>
> +#include <stddef.h>
> +#include <string.h>
> +
> +#define BACKEND loongarch_
> +#include "libebl_CPU.h"
> +
> +
> +/* Check for the simple reloc types. */
> +Elf_Type
> +loongarch_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type,
> + int *addsub)
> +{
> + switch (type)
> + {
> + case R_LARCH_32:
> + return ELF_T_WORD;
> + case R_LARCH_64:
> + return ELF_T_XWORD;
> + case R_LARCH_ADD16:
> + *addsub = 1;
> + return ELF_T_HALF;
> + case R_LARCH_ADD32:
> + *addsub = 1;
> + return ELF_T_WORD;
> + case R_LARCH_ADD64:
> + *addsub = 1;
> + return ELF_T_XWORD;
> + case R_LARCH_SUB16:
> + *addsub = -1;
> + return ELF_T_HALF;
> + case R_LARCH_SUB32:
> + *addsub = -1;
> + return ELF_T_WORD;
> + case R_LARCH_SUB64:
> + *addsub = -1;
> + return ELF_T_XWORD;
> + default:
> + return ELF_T_NUM;
> + }
> +}
> diff --git a/libebl/ChangeLog b/libebl/ChangeLog
> index 6f55a5e7..5f9ea552 100644
> --- a/libebl/ChangeLog
> +++ b/libebl/ChangeLog
> @@ -1,3 +1,7 @@
> +2022-12-02 Hengqi Chen <hengqi.chen@gmail.com>
> +
> + * eblopenbackend.c (machines): Add entries for LoongArch.
> +
> 2022-10-21 Yonggang Luo <luoyonggang@gmail.com>
>
> * eblclosebackend.c: Remove dlfcn.h include.
> diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c
> index 02f80653..b87aef19 100644
> --- a/libebl/eblopenbackend.c
> +++ b/libebl/eblopenbackend.c
> @@ -55,6 +55,7 @@ Ebl *m68k_init (Elf *, GElf_Half, Ebl *);
> Ebl *bpf_init (Elf *, GElf_Half, Ebl *);
> Ebl *riscv_init (Elf *, GElf_Half, Ebl *);
> Ebl *csky_init (Elf *, GElf_Half, Ebl *);
> +Ebl *loongarch_init (Elf *, GElf_Half, Ebl *);
>
> /* This table should contain the complete list of architectures as far
> as the ELF specification is concerned. */
> @@ -150,6 +151,7 @@ static const struct
> { riscv_init, "elf_riscv", "riscv", 5, EM_RISCV, ELFCLASS64, ELFDATA2LSB },
> { riscv_init, "elf_riscv", "riscv", 5, EM_RISCV, ELFCLASS32, ELFDATA2LSB },
> { csky_init, "elf_csky", "csky", 4, EM_CSKY, ELFCLASS32, ELFDATA2LSB },
> + { loongarch_init, "elf_loongarch", "loongarch", 9, EM_LOONGARCH, ELFCLASS64, ELFDATA2LSB },
> };
> #define nmachines (sizeof (machines) / sizeof (machines[0]))
>
> diff --git a/src/ChangeLog b/src/ChangeLog
> index 66428b70..b679f092 100644
> --- a/src/ChangeLog
> +++ b/src/ChangeLog
> @@ -1,3 +1,7 @@
> +2022-12-02 Hengqi Chen <hengqi.chen@gmail.com>
> +
> + * elflint.c (valid_e_machine): Add EM_LOONGARCH.
> +
> 2022-11-03 Mark Wielaard <mark@klomp.org>
>
> * readelf.c (get_dynscn_addrs): Check gelf_getdyn doesn't
> diff --git a/src/elflint.c b/src/elflint.c
> index 565cffdc..b9548862 100644
> --- a/src/elflint.c
> +++ b/src/elflint.c
> @@ -329,7 +329,7 @@ static const int valid_e_machine[] =
> EM_CRIS, EM_JAVELIN, EM_FIREPATH, EM_ZSP, EM_MMIX, EM_HUANY, EM_PRISM,
> EM_AVR, EM_FR30, EM_D10V, EM_D30V, EM_V850, EM_M32R, EM_MN10300,
> EM_MN10200, EM_PJ, EM_OPENRISC, EM_ARC_A5, EM_XTENSA, EM_ALPHA,
> - EM_TILEGX, EM_TILEPRO, EM_AARCH64, EM_BPF, EM_RISCV, EM_CSKY
> + EM_TILEGX, EM_TILEPRO, EM_AARCH64, EM_BPF, EM_RISCV, EM_CSKY, EM_LOONGARCH,
> };
> #define nvalid_e_machine \
> (sizeof (valid_e_machine) / sizeof (valid_e_machine[0]))
> --
> 2.37.3
>
next prev parent reply other threads:[~2022-12-12 8:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-03 13:47 Hengqi Chen
2022-12-12 8:12 ` Hengqi Chen [this message]
2022-12-19 23:06 ` Mark Wielaard
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