1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_ALPHA_ELF_H
3 #define __ASM_ALPHA_ELF_H
4 
5 #include <asm/auxvec.h>
6 #include <asm/special_insns.h>
7 
8 /* Special values for the st_other field in the symbol table.  */
9 
10 #define STO_ALPHA_NOPV		0x80
11 #define STO_ALPHA_STD_GPLOAD	0x88
12 
13 /*
14  * Alpha ELF relocation types
15  */
16 #define R_ALPHA_NONE            0       /* No reloc */
17 #define R_ALPHA_REFLONG         1       /* Direct 32 bit */
18 #define R_ALPHA_REFQUAD         2       /* Direct 64 bit */
19 #define R_ALPHA_GPREL32         3       /* GP relative 32 bit */
20 #define R_ALPHA_LITERAL         4       /* GP relative 16 bit w/optimization */
21 #define R_ALPHA_LITUSE          5       /* Optimization hint for LITERAL */
22 #define R_ALPHA_GPDISP          6       /* Add displacement to GP */
23 #define R_ALPHA_BRADDR          7       /* PC+4 relative 23 bit shifted */
24 #define R_ALPHA_HINT            8       /* PC+4 relative 16 bit shifted */
25 #define R_ALPHA_SREL16          9       /* PC relative 16 bit */
26 #define R_ALPHA_SREL32          10      /* PC relative 32 bit */
27 #define R_ALPHA_SREL64          11      /* PC relative 64 bit */
28 #define R_ALPHA_GPRELHIGH       17      /* GP relative 32 bit, high 16 bits */
29 #define R_ALPHA_GPRELLOW        18      /* GP relative 32 bit, low 16 bits */
30 #define R_ALPHA_GPREL16         19      /* GP relative 16 bit */
31 #define R_ALPHA_COPY            24      /* Copy symbol at runtime */
32 #define R_ALPHA_GLOB_DAT        25      /* Create GOT entry */
33 #define R_ALPHA_JMP_SLOT        26      /* Create PLT entry */
34 #define R_ALPHA_RELATIVE        27      /* Adjust by program base */
35 #define R_ALPHA_BRSGP		28
36 #define R_ALPHA_TLSGD           29
37 #define R_ALPHA_TLS_LDM         30
38 #define R_ALPHA_DTPMOD64        31
39 #define R_ALPHA_GOTDTPREL       32
40 #define R_ALPHA_DTPREL64        33
41 #define R_ALPHA_DTPRELHI        34
42 #define R_ALPHA_DTPRELLO        35
43 #define R_ALPHA_DTPREL16        36
44 #define R_ALPHA_GOTTPREL        37
45 #define R_ALPHA_TPREL64         38
46 #define R_ALPHA_TPRELHI         39
47 #define R_ALPHA_TPRELLO         40
48 #define R_ALPHA_TPREL16         41
49 
50 #define SHF_ALPHA_GPREL		0x10000000
51 
52 /* Legal values for e_flags field of Elf64_Ehdr.  */
53 
54 #define EF_ALPHA_32BIT		1	/* All addresses are below 2GB */
55 
56 /*
57  * ELF register definitions..
58  */
59 
60 /*
61  * The OSF/1 version of <sys/procfs.h> makes gregset_t 46 entries long.
62  * I have no idea why that is so.  For now, we just leave it at 33
63  * (32 general regs + processor status word).
64  */
65 #define ELF_NGREG	33
66 #define ELF_NFPREG	32
67 
68 typedef unsigned long elf_greg_t;
69 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
70 
71 typedef double elf_fpreg_t;
72 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
73 
74 /*
75  * This is used to ensure we don't load something for the wrong architecture.
76  */
77 #define elf_check_arch(x) ((x)->e_machine == EM_ALPHA)
78 
79 /*
80  * These are used to set parameters in the core dumps.
81  */
82 #define ELF_CLASS	ELFCLASS64
83 #define ELF_DATA	ELFDATA2LSB
84 #define ELF_ARCH	EM_ALPHA
85 
86 #define ELF_EXEC_PAGESIZE	8192
87 
88 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
89    use of this is to invoke "./ld.so someprog" to test out a new version of
90    the loader.  We need to make sure that it is out of the way of the program
91    that it will "exec", and that there is sufficient room for the brk.  */
92 
93 #define ELF_ET_DYN_BASE		(TASK_UNMAPPED_BASE + 0x1000000)
94 
95 /* $0 is set by ld.so to a pointer to a function which might be
96    registered using atexit.  This provides a mean for the dynamic
97    linker to call DT_FINI functions for shared libraries that have
98    been loaded before the code runs.
99 
100    So that we can use the same startup file with static executables,
101    we start programs with a value of 0 to indicate that there is no
102    such function.  */
103 
104 #define ELF_PLAT_INIT(_r, load_addr)	_r->r0 = 0
105 
106 /* The registers are laid out in pt_regs for PAL and syscall
107    convenience.  Re-order them for the linear elf_gregset_t.  */
108 
109 struct pt_regs;
110 struct thread_info;
111 struct task_struct;
112 extern void dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt,
113 			    struct thread_info *ti);
114 #define ELF_CORE_COPY_REGS(DEST, REGS) \
115 	dump_elf_thread(DEST, REGS, current_thread_info());
116 
117 /* Similar, but for a thread other than current.  */
118 
119 extern int dump_elf_task(elf_greg_t *dest, struct task_struct *task);
120 #define ELF_CORE_COPY_TASK_REGS(TASK, DEST) \
121 	dump_elf_task(*(DEST), TASK)
122 
123 /* This yields a mask that user programs can use to figure out what
124    instruction set this CPU supports.  This is trivial on Alpha,
125    but not so on other machines. */
126 
127 #define ELF_HWCAP  (~amask(-1))
128 
129 /* This yields a string that ld.so will use to load implementation
130    specific libraries for optimization.  This is more specific in
131    intent than poking at uname or /proc/cpuinfo.  */
132 
133 #define ELF_PLATFORM				\
134 ({						\
135 	enum implver_enum i_ = implver();	\
136 	( i_ == IMPLVER_EV4 ? "ev4"		\
137 	: i_ == IMPLVER_EV5			\
138 	  ? (amask(AMASK_BWX) ? "ev5" : "ev56")	\
139 	: amask (AMASK_CIX) ? "ev6" : "ev67");	\
140 })
141 
142 #define SET_PERSONALITY(EX)					\
143 	set_personality(((EX).e_flags & EF_ALPHA_32BIT)		\
144 	   ? PER_LINUX_32BIT : PER_LINUX)
145 
146 extern int alpha_l1i_cacheshape;
147 extern int alpha_l1d_cacheshape;
148 extern int alpha_l2_cacheshape;
149 extern int alpha_l3_cacheshape;
150 
151 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
152 #define ARCH_DLINFO						\
153   do {								\
154     NEW_AUX_ENT(AT_L1I_CACHESHAPE, alpha_l1i_cacheshape);	\
155     NEW_AUX_ENT(AT_L1D_CACHESHAPE, alpha_l1d_cacheshape);	\
156     NEW_AUX_ENT(AT_L2_CACHESHAPE, alpha_l2_cacheshape);		\
157     NEW_AUX_ENT(AT_L3_CACHESHAPE, alpha_l3_cacheshape);		\
158   } while (0)
159 
160 #endif /* __ASM_ALPHA_ELF_H */
161