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 /* Similar, but for the FP registers. */
124
125 extern int dump_elf_task_fp(elf_fpreg_t *dest, struct task_struct *task);
126 #define ELF_CORE_COPY_FPREGS(TASK, DEST) \
127 dump_elf_task_fp(*(DEST), TASK)
128
129 /* This yields a mask that user programs can use to figure out what
130 instruction set this CPU supports. This is trivial on Alpha,
131 but not so on other machines. */
132
133 #define ELF_HWCAP (~amask(-1))
134
135 /* This yields a string that ld.so will use to load implementation
136 specific libraries for optimization. This is more specific in
137 intent than poking at uname or /proc/cpuinfo. */
138
139 #define ELF_PLATFORM \
140 ({ \
141 enum implver_enum i_ = implver(); \
142 ( i_ == IMPLVER_EV4 ? "ev4" \
143 : i_ == IMPLVER_EV5 \
144 ? (amask(AMASK_BWX) ? "ev5" : "ev56") \
145 : amask (AMASK_CIX) ? "ev6" : "ev67"); \
146 })
147
148 #define SET_PERSONALITY(EX) \
149 set_personality(((EX).e_flags & EF_ALPHA_32BIT) \
150 ? PER_LINUX_32BIT : PER_LINUX)
151
152 extern int alpha_l1i_cacheshape;
153 extern int alpha_l1d_cacheshape;
154 extern int alpha_l2_cacheshape;
155 extern int alpha_l3_cacheshape;
156
157 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
158 #define ARCH_DLINFO \
159 do { \
160 NEW_AUX_ENT(AT_L1I_CACHESHAPE, alpha_l1i_cacheshape); \
161 NEW_AUX_ENT(AT_L1D_CACHESHAPE, alpha_l1d_cacheshape); \
162 NEW_AUX_ENT(AT_L2_CACHESHAPE, alpha_l2_cacheshape); \
163 NEW_AUX_ENT(AT_L3_CACHESHAPE, alpha_l3_cacheshape); \
164 } while (0)
165
166 #endif /* __ASM_ALPHA_ELF_H */