opcodes: add support for eBPF

This patch adds support for the Linux kernel eBPF architecture to the
opcodes.  The port is based on CGEN.

opcodes/ChangeLog:

2019-05-23  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* configure.ac (SHARED_DEPENDENCIES): Add case for bfd_bpf_arch.
	* configure: Regenerated.
	* Makefile.am: Add rules for the files generated from cpu/bpf.cpu
	and cpu/bpf.opc.
	(HFILES): Add bpf-desc.h and bpf-opc.h.
	(TARGET_LIBOPCODES_CFILES): Add bpf-asm.c, bpf-desc.c, bpf-dis.c,
	bpf-ibld.c and bpf-opc.c.
	(BPF_DEPS): Define.
	* Makefile.in: Regenerated.
	* disassemble.c (ARCH_bpf): Define.
	(disassembler): Add case for bfd_arch_bpf.
	(disassemble_init_for_target): Likewise.
	(enum epbf_isa_attr): Define.
	* disassemble.h: extern print_insn_bpf.
	* bpf-asm.c: Generated.
	* bpf-opc.h: Likewise.
	* bpf-opc.c: Likewise.
	* bpf-ibld.c: Likewise.
	* bpf-dis.c: Likewise.
	* bpf-desc.h: Likewise.
	* bpf-desc.c: Likewise.

1 files changed, 266 insertions, 0 deletions

diff --git a/opcodes/bpf-desc.h b/opcodes/bpf-desc.h
new file mode 100644
index 0000000..5293517
--- /dev/null
+++ b/opcodes/bpf-desc.h
@@ -0,0 +1,266 @@
+/* DO NOT EDIT!  -*- buffer-read-only: t -*- vi:set ro:  */
+/* CPU data header for bpf.
+
+THIS FILE IS MACHINE GENERATED WITH CGEN.
+
+Copyright (C) 1996-2019 Free Software Foundation, Inc.
+
+This file is part of the GNU Binutils and/or GDB, the GNU debugger.
+
+   This file 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, or (at your option)
+   any later version.
+
+   It 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; if not, write to the Free Software Foundation, Inc.,
+   51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+
+*/
+
+#ifndef BPF_CPU_H
+#define BPF_CPU_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define CGEN_ARCH bpf
+
+/* Given symbol S, return bpf_cgen_<S>.  */
+#define CGEN_SYM(s) bpf##_cgen_##s
+
+
+/* Selected cpu families.  */
+#define HAVE_CPU_BPFBF
+
+#define CGEN_INSN_LSB0_P 1
+
+/* Minimum size of any insn (in bytes).  */
+#define CGEN_MIN_INSN_SIZE 8
+
+/* Maximum size of any insn (in bytes).  */
+#define CGEN_MAX_INSN_SIZE 16
+
+#define CGEN_INT_INSN_P 0
+
+/* Maximum number of syntax elements in an instruction.  */
+#define CGEN_ACTUAL_MAX_SYNTAX_ELEMENTS 16
+
+/* CGEN_MNEMONIC_OPERANDS is defined if mnemonics have operands.
+   e.g. In "b,a foo" the ",a" is an operand.  If mnemonics have operands
+   we can't hash on everything up to the space.  */
+#define CGEN_MNEMONIC_OPERANDS
+
+/* Maximum number of fields in an instruction.  */
+#define CGEN_ACTUAL_MAX_IFMT_OPERANDS 7
+
+/* Enums.  */
+
+/* Enum declaration for eBPF instruction codes.  */
+typedef enum insn_op_code_alu {
+  OP_CODE_ADD = 0, OP_CODE_SUB = 1, OP_CODE_MUL = 2, OP_CODE_DIV = 3
+ , OP_CODE_OR = 4, OP_CODE_AND = 5, OP_CODE_LSH = 6, OP_CODE_RSH = 7
+ , OP_CODE_NEG = 8, OP_CODE_MOD = 9, OP_CODE_XOR = 10, OP_CODE_MOV = 11
+ , OP_CODE_ARSH = 12, OP_CODE_END = 13, OP_CODE_JA = 0, OP_CODE_JEQ = 1
+ , OP_CODE_JGT = 2, OP_CODE_JGE = 3, OP_CODE_JSET = 4, OP_CODE_JNE = 5
+ , OP_CODE_JSGT = 6, OP_CODE_JSGE = 7, OP_CODE_CALL = 8, OP_CODE_EXIT = 9
+ , OP_CODE_JLT = 10, OP_CODE_JLE = 11, OP_CODE_JSLT = 12, OP_CODE_JSLE = 13
+} INSN_OP_CODE_ALU;
+
+/* Enum declaration for eBPF instruction source.  */
+typedef enum insn_op_src {
+  OP_SRC_K, OP_SRC_X
+} INSN_OP_SRC;
+
+/* Enum declaration for eBPF instruction class.  */
+typedef enum insn_op_class {
+  OP_CLASS_LD = 0, OP_CLASS_LDX = 1, OP_CLASS_ST = 2, OP_CLASS_STX = 3
+ , OP_CLASS_ALU = 4, OP_CLASS_JMP = 5, OP_CLASS_ALU64 = 7
+} INSN_OP_CLASS;
+
+/* Enum declaration for eBPF load/store instruction modes.  */
+typedef enum insn_op_mode {
+  OP_MODE_IMM = 0, OP_MODE_ABS = 1, OP_MODE_IND = 2, OP_MODE_MEM = 3
+ , OP_MODE_XADD = 6
+} INSN_OP_MODE;
+
+/* Enum declaration for eBPF load/store instruction sizes.  */
+typedef enum insn_op_size {
+  OP_SIZE_W, OP_SIZE_H, OP_SIZE_B, OP_SIZE_DW
+} INSN_OP_SIZE;
+
+/* Attributes.  */
+
+/* Enum declaration for machine type selection.  */
+typedef enum mach_attr {
+  MACH_BASE, MACH_BPF, MACH_MAX
+} MACH_ATTR;
+
+/* Enum declaration for instruction set selection.  */
+typedef enum isa_attr {
+  ISA_EBPFLE, ISA_EBPFBE, ISA_MAX
+} ISA_ATTR;
+
+/* Number of architecture variants.  */
+#define MAX_ISAS  ((int) ISA_MAX)
+#define MAX_MACHS ((int) MACH_MAX)
+
+/* Ifield support.  */
+
+/* Ifield attribute indices.  */
+
+/* Enum declaration for cgen_ifld attrs.  */
+typedef enum cgen_ifld_attr {
+  CGEN_IFLD_VIRTUAL, CGEN_IFLD_PCREL_ADDR, CGEN_IFLD_ABS_ADDR, CGEN_IFLD_RESERVED
+ , CGEN_IFLD_SIGN_OPT, CGEN_IFLD_SIGNED, CGEN_IFLD_END_BOOLS, CGEN_IFLD_START_NBOOLS = 31
+ , CGEN_IFLD_MACH, CGEN_IFLD_ISA, CGEN_IFLD_END_NBOOLS
+} CGEN_IFLD_ATTR;
+
+/* Number of non-boolean elements in cgen_ifld_attr.  */
+#define CGEN_IFLD_NBOOL_ATTRS (CGEN_IFLD_END_NBOOLS - CGEN_IFLD_START_NBOOLS - 1)
+
+/* cgen_ifld attribute accessor macros.  */
+#define CGEN_ATTR_CGEN_IFLD_MACH_VALUE(attrs) ((attrs)->nonbool[CGEN_IFLD_MACH-CGEN_IFLD_START_NBOOLS-1].nonbitset)
+#define CGEN_ATTR_CGEN_IFLD_ISA_VALUE(attrs) ((attrs)->nonbool[CGEN_IFLD_ISA-CGEN_IFLD_START_NBOOLS-1].bitset)
+#define CGEN_ATTR_CGEN_IFLD_VIRTUAL_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_IFLD_VIRTUAL)) != 0)
+#define CGEN_ATTR_CGEN_IFLD_PCREL_ADDR_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_IFLD_PCREL_ADDR)) != 0)
+#define CGEN_ATTR_CGEN_IFLD_ABS_ADDR_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_IFLD_ABS_ADDR)) != 0)
+#define CGEN_ATTR_CGEN_IFLD_RESERVED_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_IFLD_RESERVED)) != 0)
+#define CGEN_ATTR_CGEN_IFLD_SIGN_OPT_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_IFLD_SIGN_OPT)) != 0)
+#define CGEN_ATTR_CGEN_IFLD_SIGNED_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_IFLD_SIGNED)) != 0)
+
+/* Enum declaration for bpf ifield types.  */
+typedef enum ifield_type {
+  BPF_F_NIL, BPF_F_ANYOF, BPF_F_OP_CODE, BPF_F_OP_SRC
+ , BPF_F_OP_CLASS, BPF_F_OP_MODE, BPF_F_OP_SIZE, BPF_F_DSTLE
+ , BPF_F_SRCLE, BPF_F_DSTBE, BPF_F_SRCBE, BPF_F_REGS
+ , BPF_F_OFFSET16, BPF_F_IMM32, BPF_F_IMM64_A, BPF_F_IMM64_B
+ , BPF_F_IMM64_C, BPF_F_IMM64, BPF_F_MAX
+} IFIELD_TYPE;
+
+#define MAX_IFLD ((int) BPF_F_MAX)
+
+/* Hardware attribute indices.  */
+
+/* Enum declaration for cgen_hw attrs.  */
+typedef enum cgen_hw_attr {
+  CGEN_HW_VIRTUAL, CGEN_HW_CACHE_ADDR, CGEN_HW_PC, CGEN_HW_PROFILE
+ , CGEN_HW_END_BOOLS, CGEN_HW_START_NBOOLS = 31, CGEN_HW_MACH, CGEN_HW_ISA
+ , CGEN_HW_END_NBOOLS
+} CGEN_HW_ATTR;
+
+/* Number of non-boolean elements in cgen_hw_attr.  */
+#define CGEN_HW_NBOOL_ATTRS (CGEN_HW_END_NBOOLS - CGEN_HW_START_NBOOLS - 1)
+
+/* cgen_hw attribute accessor macros.  */
+#define CGEN_ATTR_CGEN_HW_MACH_VALUE(attrs) ((attrs)->nonbool[CGEN_HW_MACH-CGEN_HW_START_NBOOLS-1].nonbitset)
+#define CGEN_ATTR_CGEN_HW_ISA_VALUE(attrs) ((attrs)->nonbool[CGEN_HW_ISA-CGEN_HW_START_NBOOLS-1].bitset)
+#define CGEN_ATTR_CGEN_HW_VIRTUAL_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_HW_VIRTUAL)) != 0)
+#define CGEN_ATTR_CGEN_HW_CACHE_ADDR_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_HW_CACHE_ADDR)) != 0)
+#define CGEN_ATTR_CGEN_HW_PC_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_HW_PC)) != 0)
+#define CGEN_ATTR_CGEN_HW_PROFILE_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_HW_PROFILE)) != 0)
+
+/* Enum declaration for bpf hardware types.  */
+typedef enum cgen_hw_type {
+  HW_H_MEMORY, HW_H_SINT, HW_H_UINT, HW_H_ADDR
+ , HW_H_IADDR, HW_H_GPR, HW_H_PC, HW_H_SINT64
+ , HW_MAX
+} CGEN_HW_TYPE;
+
+#define MAX_HW ((int) HW_MAX)
+
+/* Operand attribute indices.  */
+
+/* Enum declaration for cgen_operand attrs.  */
+typedef enum cgen_operand_attr {
+  CGEN_OPERAND_VIRTUAL, CGEN_OPERAND_PCREL_ADDR, CGEN_OPERAND_ABS_ADDR, CGEN_OPERAND_SIGN_OPT
+ , CGEN_OPERAND_SIGNED, CGEN_OPERAND_NEGATIVE, CGEN_OPERAND_RELAX, CGEN_OPERAND_SEM_ONLY
+ , CGEN_OPERAND_END_BOOLS, CGEN_OPERAND_START_NBOOLS = 31, CGEN_OPERAND_MACH, CGEN_OPERAND_ISA
+ , CGEN_OPERAND_END_NBOOLS
+} CGEN_OPERAND_ATTR;
+
+/* Number of non-boolean elements in cgen_operand_attr.  */
+#define CGEN_OPERAND_NBOOL_ATTRS (CGEN_OPERAND_END_NBOOLS - CGEN_OPERAND_START_NBOOLS - 1)
+
+/* cgen_operand attribute accessor macros.  */
+#define CGEN_ATTR_CGEN_OPERAND_MACH_VALUE(attrs) ((attrs)->nonbool[CGEN_OPERAND_MACH-CGEN_OPERAND_START_NBOOLS-1].nonbitset)
+#define CGEN_ATTR_CGEN_OPERAND_ISA_VALUE(attrs) ((attrs)->nonbool[CGEN_OPERAND_ISA-CGEN_OPERAND_START_NBOOLS-1].bitset)
+#define CGEN_ATTR_CGEN_OPERAND_VIRTUAL_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_OPERAND_VIRTUAL)) != 0)
+#define CGEN_ATTR_CGEN_OPERAND_PCREL_ADDR_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_OPERAND_PCREL_ADDR)) != 0)
+#define CGEN_ATTR_CGEN_OPERAND_ABS_ADDR_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_OPERAND_ABS_ADDR)) != 0)
+#define CGEN_ATTR_CGEN_OPERAND_SIGN_OPT_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_OPERAND_SIGN_OPT)) != 0)
+#define CGEN_ATTR_CGEN_OPERAND_SIGNED_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_OPERAND_SIGNED)) != 0)
+#define CGEN_ATTR_CGEN_OPERAND_NEGATIVE_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_OPERAND_NEGATIVE)) != 0)
+#define CGEN_ATTR_CGEN_OPERAND_RELAX_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_OPERAND_RELAX)) != 0)
+#define CGEN_ATTR_CGEN_OPERAND_SEM_ONLY_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_OPERAND_SEM_ONLY)) != 0)
+
+/* Enum declaration for bpf operand types.  */
+typedef enum cgen_operand_type {
+  BPF_OPERAND_PC, BPF_OPERAND_DSTLE, BPF_OPERAND_SRCLE, BPF_OPERAND_DSTBE
+ , BPF_OPERAND_SRCBE, BPF_OPERAND_DISP16, BPF_OPERAND_DISP32, BPF_OPERAND_IMM32
+ , BPF_OPERAND_OFFSET16, BPF_OPERAND_IMM64, BPF_OPERAND_ENDSIZE, BPF_OPERAND_MAX
+} CGEN_OPERAND_TYPE;
+
+/* Number of operands types.  */
+#define MAX_OPERANDS 11
+
+/* Maximum number of operands referenced by any insn.  */
+#define MAX_OPERAND_INSTANCES 8
+
+/* Insn attribute indices.  */
+
+/* Enum declaration for cgen_insn attrs.  */
+typedef enum cgen_insn_attr {
+  CGEN_INSN_ALIAS, CGEN_INSN_VIRTUAL, CGEN_INSN_UNCOND_CTI, CGEN_INSN_COND_CTI
+ , CGEN_INSN_SKIP_CTI, CGEN_INSN_DELAY_SLOT, CGEN_INSN_RELAXABLE, CGEN_INSN_RELAXED
+ , CGEN_INSN_NO_DIS, CGEN_INSN_PBB, CGEN_INSN_END_BOOLS, CGEN_INSN_START_NBOOLS = 31
+ , CGEN_INSN_MACH, CGEN_INSN_ISA, CGEN_INSN_END_NBOOLS
+} CGEN_INSN_ATTR;
+
+/* Number of non-boolean elements in cgen_insn_attr.  */
+#define CGEN_INSN_NBOOL_ATTRS (CGEN_INSN_END_NBOOLS - CGEN_INSN_START_NBOOLS - 1)
+
+/* cgen_insn attribute accessor macros.  */
+#define CGEN_ATTR_CGEN_INSN_MACH_VALUE(attrs) ((attrs)->nonbool[CGEN_INSN_MACH-CGEN_INSN_START_NBOOLS-1].nonbitset)
+#define CGEN_ATTR_CGEN_INSN_ISA_VALUE(attrs) ((attrs)->nonbool[CGEN_INSN_ISA-CGEN_INSN_START_NBOOLS-1].bitset)
+#define CGEN_ATTR_CGEN_INSN_ALIAS_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_ALIAS)) != 0)
+#define CGEN_ATTR_CGEN_INSN_VIRTUAL_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_VIRTUAL)) != 0)
+#define CGEN_ATTR_CGEN_INSN_UNCOND_CTI_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_UNCOND_CTI)) != 0)
+#define CGEN_ATTR_CGEN_INSN_COND_CTI_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_COND_CTI)) != 0)
+#define CGEN_ATTR_CGEN_INSN_SKIP_CTI_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_SKIP_CTI)) != 0)
+#define CGEN_ATTR_CGEN_INSN_DELAY_SLOT_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_DELAY_SLOT)) != 0)
+#define CGEN_ATTR_CGEN_INSN_RELAXABLE_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_RELAXABLE)) != 0)
+#define CGEN_ATTR_CGEN_INSN_RELAXED_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_RELAXED)) != 0)
+#define CGEN_ATTR_CGEN_INSN_NO_DIS_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_NO_DIS)) != 0)
+#define CGEN_ATTR_CGEN_INSN_PBB_VALUE(attrs) (((attrs)->bool_ & (1 << CGEN_INSN_PBB)) != 0)
+
+/* cgen.h uses things we just defined.  */
+#include "opcode/cgen.h"
+
+extern const struct cgen_ifld bpf_cgen_ifld_table[];
+
+/* Attributes.  */
+extern const CGEN_ATTR_TABLE bpf_cgen_hardware_attr_table[];
+extern const CGEN_ATTR_TABLE bpf_cgen_ifield_attr_table[];
+extern const CGEN_ATTR_TABLE bpf_cgen_operand_attr_table[];
+extern const CGEN_ATTR_TABLE bpf_cgen_insn_attr_table[];
+
+/* Hardware decls.  */
+
+extern CGEN_KEYWORD bpf_cgen_opval_h_gpr;
+
+extern const CGEN_HW_ENTRY bpf_cgen_hw_table[];
+
+
+
+   #ifdef __cplusplus
+   }
+   #endif
+
+#endif /* BPF_CPU_H */