LoongArch bfd support

2021-10-22  Chenghua Xu  <xuchenghua@loongson.cn>
	    Zhensong Liu  <liuzhensong@loongson.cn>
	    Weinan Liu  <liuweinan@loongson.cn>
bfd/
	* Makefile.am: Add LoongArch.
	* archures.c: Likewise.
	* config.bfd: Likewise.
	* configure.ac: Likewise.
	* cpu-loongarch.c: New.
	* elf-bfd.h: Add LoongArch.
	* elf.c: Add LoongArch elfcore_grok_xxx.
	* elfnn-loongarch.c: New.
	* elfxx-loongarch.c: New.
	* elfxx-loongarch.h: New.
	* reloc.c: Add LoongArch BFD RELOC ENUM.
	* targets.c: Add LoongArch target.
	* Makefile.in: Regenerate.
	* bfd-in2.h: Regenerate.
	* configure: Regenerate.
	* libbfd.h: Regenerate.
	* po/BLD-POTFILES.in: Regenerate.
	* po/SRC-POTFILES.in: Regenerate.

include/
	* elf/common.h: Add NT_LARCH_{CPUCFG,CSR,LSX,LASX}.
	* elf/loongarch.h: New.

2 files changed, 130 insertions, 1 deletions

diff --git a/include/elf/common.h b/include/elf/common.h
index efb7ff0..42dadbb 100644
--- a/include/elf/common.h
+++ b/include/elf/common.h
@@ -686,8 +686,18 @@
 					/*   note name must be "LINUX".  */
 #define NT_ARC_V2	0x600		/* ARC HS accumulator/extra registers.  */
 					/*   note name must be "LINUX".  */
-#define NT_RISCV_CSR    0x900		/* RISC-V Control and Status Registers */
+#define NT_LARCH_CPUCFG 0xa00		/* LoongArch CPU config registers */
+					/*   note name must be "LINUX".  */
+#define NT_LARCH_CSR    0xa01		/* LoongArch Control State Registers */
+					/*   note name must be "LINUX".  */
+#define NT_LARCH_LSX    0xa02		/* LoongArch SIMD eXtension registers */
+					/*   note name must be "LINUX".  */
+#define NT_LARCH_LASX   0xa03		/* LoongArch Advanced SIMD eXtension registers */
+					/*   note name must be "LINUX".  */
+#define NT_LARCH_LBT    0xa04		/* LoongArch Binary Translation registers */
 					/*   note name must be "CORE".  */
+#define NT_RISCV_CSR    0x900		/* RISC-V Control and Status Registers */
+					/*   note name must be "LINUX".  */
 #define NT_SIGINFO	0x53494749	/* Fields of siginfo_t.  */
 #define NT_FILE		0x46494c45	/* Description of mapped files.  */
 
diff --git a/include/elf/loongarch.h b/include/elf/loongarch.h
new file mode 100644
index 0000000..b4d801a
--- /dev/null
+++ b/include/elf/loongarch.h
@@ -0,0 +1,119 @@
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+   Contributed by Loongson Ltd.
+
+   This file is part of GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the license, or
+   (at your option) any later version.
+
+   This program 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 a copy of the GNU General Public License
+   along with this program; see the file COPYING3.  If not,
+   see <http://www.gnu.org/licenses/>.  */
+
+#ifndef _ELF_LOONGARCH_H
+#define _ELF_LOONGARCH_H
+
+#include "elf/reloc-macros.h"
+#include "libiberty.h"
+
+START_RELOC_NUMBERS (elf_loongarch_reloc_type)
+/* Used by the dynamic linker.  */
+RELOC_NUMBER (R_LARCH_NONE, 0)
+RELOC_NUMBER (R_LARCH_32, 1)
+RELOC_NUMBER (R_LARCH_64, 2)
+RELOC_NUMBER (R_LARCH_RELATIVE, 3)
+RELOC_NUMBER (R_LARCH_COPY, 4)
+RELOC_NUMBER (R_LARCH_JUMP_SLOT, 5)
+RELOC_NUMBER (R_LARCH_TLS_DTPMOD32, 6)
+RELOC_NUMBER (R_LARCH_TLS_DTPMOD64, 7)
+RELOC_NUMBER (R_LARCH_TLS_DTPREL32, 8)
+RELOC_NUMBER (R_LARCH_TLS_DTPREL64, 9)
+RELOC_NUMBER (R_LARCH_TLS_TPREL32, 10)
+RELOC_NUMBER (R_LARCH_TLS_TPREL64, 11)
+RELOC_NUMBER (R_LARCH_IRELATIVE, 12)
+
+/* Reserved for future relocs that the dynamic linker must understand.  */
+
+/* Used by the static linker for relocating .text.  */
+RELOC_NUMBER (R_LARCH_MARK_LA, 20)
+RELOC_NUMBER (R_LARCH_MARK_PCREL, 21)
+
+RELOC_NUMBER (R_LARCH_SOP_PUSH_PCREL, 22)
+
+RELOC_NUMBER (R_LARCH_SOP_PUSH_ABSOLUTE, 23)
+
+RELOC_NUMBER (R_LARCH_SOP_PUSH_DUP, 24)
+RELOC_NUMBER (R_LARCH_SOP_PUSH_GPREL, 25)
+RELOC_NUMBER (R_LARCH_SOP_PUSH_TLS_TPREL, 26)
+RELOC_NUMBER (R_LARCH_SOP_PUSH_TLS_GOT, 27)
+RELOC_NUMBER (R_LARCH_SOP_PUSH_TLS_GD, 28)
+RELOC_NUMBER (R_LARCH_SOP_PUSH_PLT_PCREL, 29)
+
+RELOC_NUMBER (R_LARCH_SOP_ASSERT, 30)
+RELOC_NUMBER (R_LARCH_SOP_NOT, 31)
+RELOC_NUMBER (R_LARCH_SOP_SUB, 32)
+RELOC_NUMBER (R_LARCH_SOP_SL, 33)
+RELOC_NUMBER (R_LARCH_SOP_SR, 34)
+RELOC_NUMBER (R_LARCH_SOP_ADD, 35)
+RELOC_NUMBER (R_LARCH_SOP_AND, 36)
+RELOC_NUMBER (R_LARCH_SOP_IF_ELSE, 37)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_S_10_5, 38)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_U_10_12, 39)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_S_10_12, 40)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_S_10_16, 41)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_S_10_16_S2, 42)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_S_5_20, 43)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_S_0_5_10_16_S2, 44)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_S_0_10_10_16_S2, 45)
+RELOC_NUMBER (R_LARCH_SOP_POP_32_U, 46)
+
+/* Used by the static linker for relocating non .text.  */
+RELOC_NUMBER (R_LARCH_ADD8, 47)
+RELOC_NUMBER (R_LARCH_ADD16, 48)
+RELOC_NUMBER (R_LARCH_ADD24, 49)
+RELOC_NUMBER (R_LARCH_ADD32, 50)
+RELOC_NUMBER (R_LARCH_ADD64, 51)
+RELOC_NUMBER (R_LARCH_SUB8, 52)
+RELOC_NUMBER (R_LARCH_SUB16, 53)
+RELOC_NUMBER (R_LARCH_SUB24, 54)
+RELOC_NUMBER (R_LARCH_SUB32, 55)
+RELOC_NUMBER (R_LARCH_SUB64, 56)
+
+/* I don't know what it is.  Existing in almost all other arch.  */
+RELOC_NUMBER (R_LARCH_GNU_VTINHERIT, 57)
+RELOC_NUMBER (R_LARCH_GNU_VTENTRY, 58)
+
+END_RELOC_NUMBERS (R_LARCH_count)
+
+/* Processor specific flags for the ELF header e_flags field.  */
+#define EF_LOONGARCH_ABI_ILP32	    0b01
+#define EF_LOONGARCH_ABI_LP64	    0b11
+#define EF_LOONGARCH_ABI_MASK	    0b11
+
+#define EF_LOONGARCH_FLOAT_ABI_SOFT    0b001100
+#define EF_LOONGARCH_FLOAT_ABI_SINGLE  0b001000
+#define EF_LOONGARCH_FLOAT_ABI_DOUBLE  0b000000
+#define EF_LOONGARCH_FLOAT_ABI_MASK    0b111100
+
+#define EF_LOONGARCH_IS_LP64(abi) \
+  ((abi & EF_LOONGARCH_ABI_MASK) == EF_LOONGARCH_ABI_LP64)
+#define EF_LOONGARCH_IS_ILP32(abi) \
+  ((abi & EF_LOONGARCH_ABI_MASK) == EF_LOONGARCH_ABI_ILP32)
+
+#define EF_LOONGARCH_IS_SOFT_FLOAT(abi) \
+  ((abi & EF_LOONGARCH_FLOAT_ABI_MASK) == EF_LOONGARCH_FLOAT_ABI_SOFT)
+#define EF_LOONGARCH_IS_SINGLE_FLOAT(abi) \
+  ((abi & EF_LOONGARCH_FLOAT_ABI_MASK) == EF_LOONGARCH_FLOAT_ABI_SINGLE)
+#define EF_LOONGARCH_IS_DOUBLE_FLOAT(abi) \
+  ((abi & EF_LOONGARCH_FLOAT_ABI_MASK) == EF_LOONGARCH_FLOAT_ABI_DOUBLE)
+
+#define EF_LOONGARCH_ABI (EF_LOONGARCH_ABI_MASK | EF_LOONGARCH_FLOAT_ABI_MASK)
+
+#endif /* _ELF_LOONGARCH_H */