xref: /freebsd/sys/riscv/include/elf.h (revision 069ac184)
1 /*-
2  * Copyright (c) 1996-1997 John D. Polstra.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #ifndef	_MACHINE_ELF_H_
28 #define	_MACHINE_ELF_H_
29 
30 /*
31  * ELF definitions for the RISC-V architecture.
32  */
33 
34 #include <sys/elf32.h>	/* Definitions common to all 32 bit architectures. */
35 #include <sys/elf64.h>	/* Definitions common to all 64 bit architectures. */
36 
37 #define	__ELF_WORD_SIZE	64	/* Used by <sys/elf_generic.h> */
38 #include <sys/elf_generic.h>
39 
40 /*
41  * Auxiliary vector entries for passing information to the interpreter.
42  */
43 
44 typedef struct {	/* Auxiliary vector entry on initial stack */
45 	int	a_type;			/* Entry type. */
46 	union {
47 		int	a_val;		/* Integer value. */
48 	} a_un;
49 } Elf32_Auxinfo;
50 
51 typedef struct {	/* Auxiliary vector entry on initial stack */
52 	long	a_type;			/* Entry type. */
53 	union {
54 		long	a_val;		/* Integer value. */
55 		void	*a_ptr;		/* Address. */
56 		void	(*a_fcn)(void);	/* Function pointer (not used). */
57 	} a_un;
58 } Elf64_Auxinfo;
59 
60 __ElfType(Auxinfo);
61 
62 #define	ELF_ARCH	EM_RISCV
63 
64 #define	ELF_MACHINE_OK(x) ((x) == (ELF_ARCH))
65 
66 /* Define "machine" characteristics */
67 #define	ELF_TARG_CLASS	ELFCLASS64
68 #define	ELF_TARG_DATA	ELFDATA2LSB
69 #define	ELF_TARG_MACH	EM_RISCV
70 #define	ELF_TARG_VER	1
71 
72 /* TODO: set correct value */
73 #define	ET_DYN_LOAD_ADDR 0x100000
74 
75 /* Flags passed in AT_HWCAP */
76 #define	HWCAP_ISA_BIT(c)	(1 << ((c) - 'a'))
77 #define	HWCAP_ISA_I		HWCAP_ISA_BIT('i')
78 #define	HWCAP_ISA_M		HWCAP_ISA_BIT('m')
79 #define	HWCAP_ISA_A		HWCAP_ISA_BIT('a')
80 #define	HWCAP_ISA_F		HWCAP_ISA_BIT('f')
81 #define	HWCAP_ISA_D		HWCAP_ISA_BIT('d')
82 #define	HWCAP_ISA_C		HWCAP_ISA_BIT('c')
83 #define	HWCAP_ISA_G		\
84     (HWCAP_ISA_I | HWCAP_ISA_M | HWCAP_ISA_A | HWCAP_ISA_F | HWCAP_ISA_D)
85 
86 #endif /* !_MACHINE_ELF_H_ */
87