1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_IA64_ELF_H
3 #define _ASM_IA64_ELF_H
4
5 /*
6 * ELF-specific definitions.
7 *
8 * Copyright (C) 1998-1999, 2002-2004 Hewlett-Packard Co
9 * David Mosberger-Tang <davidm@hpl.hp.com>
10 */
11
12
13 #include <asm/fpu.h>
14 #include <asm/page.h>
15 #include <asm/auxvec.h>
16
17 /*
18 * This is used to ensure we don't load something for the wrong architecture.
19 */
20 #define elf_check_arch(x) ((x)->e_machine == EM_IA_64)
21
22 /*
23 * These are used to set parameters in the core dumps.
24 */
25 #define ELF_CLASS ELFCLASS64
26 #define ELF_DATA ELFDATA2LSB
27 #define ELF_ARCH EM_IA_64
28
29 #define CORE_DUMP_USE_REGSET
30
31 /* Least-significant four bits of ELF header's e_flags are OS-specific. The bits are
32 interpreted as follows by Linux: */
33 #define EF_IA_64_LINUX_EXECUTABLE_STACK 0x1 /* is stack (& heap) executable by default? */
34
35 #define ELF_EXEC_PAGESIZE PAGE_SIZE
36
37 /*
38 * This is the location that an ET_DYN program is loaded if exec'ed.
39 * Typical use of this is to invoke "./ld.so someprog" to test out a
40 * new version of the loader. We need to make sure that it is out of
41 * the way of the program that it will "exec", and that there is
42 * sufficient room for the brk.
43 */
44 #define ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x800000000UL)
45
46 #define PT_IA_64_UNWIND 0x70000001
47
48 /* IA-64 relocations: */
49 #define R_IA64_NONE 0x00 /* none */
50 #define R_IA64_IMM14 0x21 /* symbol + addend, add imm14 */
51 #define R_IA64_IMM22 0x22 /* symbol + addend, add imm22 */
52 #define R_IA64_IMM64 0x23 /* symbol + addend, mov imm64 */
53 #define R_IA64_DIR32MSB 0x24 /* symbol + addend, data4 MSB */
54 #define R_IA64_DIR32LSB 0x25 /* symbol + addend, data4 LSB */
55 #define R_IA64_DIR64MSB 0x26 /* symbol + addend, data8 MSB */
56 #define R_IA64_DIR64LSB 0x27 /* symbol + addend, data8 LSB */
57 #define R_IA64_GPREL22 0x2a /* @gprel(sym+add), add imm22 */
58 #define R_IA64_GPREL64I 0x2b /* @gprel(sym+add), mov imm64 */
59 #define R_IA64_GPREL32MSB 0x2c /* @gprel(sym+add), data4 MSB */
60 #define R_IA64_GPREL32LSB 0x2d /* @gprel(sym+add), data4 LSB */
61 #define R_IA64_GPREL64MSB 0x2e /* @gprel(sym+add), data8 MSB */
62 #define R_IA64_GPREL64LSB 0x2f /* @gprel(sym+add), data8 LSB */
63 #define R_IA64_LTOFF22 0x32 /* @ltoff(sym+add), add imm22 */
64 #define R_IA64_LTOFF64I 0x33 /* @ltoff(sym+add), mov imm64 */
65 #define R_IA64_PLTOFF22 0x3a /* @pltoff(sym+add), add imm22 */
66 #define R_IA64_PLTOFF64I 0x3b /* @pltoff(sym+add), mov imm64 */
67 #define R_IA64_PLTOFF64MSB 0x3e /* @pltoff(sym+add), data8 MSB */
68 #define R_IA64_PLTOFF64LSB 0x3f /* @pltoff(sym+add), data8 LSB */
69 #define R_IA64_FPTR64I 0x43 /* @fptr(sym+add), mov imm64 */
70 #define R_IA64_FPTR32MSB 0x44 /* @fptr(sym+add), data4 MSB */
71 #define R_IA64_FPTR32LSB 0x45 /* @fptr(sym+add), data4 LSB */
72 #define R_IA64_FPTR64MSB 0x46 /* @fptr(sym+add), data8 MSB */
73 #define R_IA64_FPTR64LSB 0x47 /* @fptr(sym+add), data8 LSB */
74 #define R_IA64_PCREL60B 0x48 /* @pcrel(sym+add), brl */
75 #define R_IA64_PCREL21B 0x49 /* @pcrel(sym+add), ptb, call */
76 #define R_IA64_PCREL21M 0x4a /* @pcrel(sym+add), chk.s */
77 #define R_IA64_PCREL21F 0x4b /* @pcrel(sym+add), fchkf */
78 #define R_IA64_PCREL32MSB 0x4c /* @pcrel(sym+add), data4 MSB */
79 #define R_IA64_PCREL32LSB 0x4d /* @pcrel(sym+add), data4 LSB */
80 #define R_IA64_PCREL64MSB 0x4e /* @pcrel(sym+add), data8 MSB */
81 #define R_IA64_PCREL64LSB 0x4f /* @pcrel(sym+add), data8 LSB */
82 #define R_IA64_LTOFF_FPTR22 0x52 /* @ltoff(@fptr(s+a)), imm22 */
83 #define R_IA64_LTOFF_FPTR64I 0x53 /* @ltoff(@fptr(s+a)), imm64 */
84 #define R_IA64_LTOFF_FPTR32MSB 0x54 /* @ltoff(@fptr(s+a)), 4 MSB */
85 #define R_IA64_LTOFF_FPTR32LSB 0x55 /* @ltoff(@fptr(s+a)), 4 LSB */
86 #define R_IA64_LTOFF_FPTR64MSB 0x56 /* @ltoff(@fptr(s+a)), 8 MSB */
87 #define R_IA64_LTOFF_FPTR64LSB 0x57 /* @ltoff(@fptr(s+a)), 8 LSB */
88 #define R_IA64_SEGREL32MSB 0x5c /* @segrel(sym+add), data4 MSB */
89 #define R_IA64_SEGREL32LSB 0x5d /* @segrel(sym+add), data4 LSB */
90 #define R_IA64_SEGREL64MSB 0x5e /* @segrel(sym+add), data8 MSB */
91 #define R_IA64_SEGREL64LSB 0x5f /* @segrel(sym+add), data8 LSB */
92 #define R_IA64_SECREL32MSB 0x64 /* @secrel(sym+add), data4 MSB */
93 #define R_IA64_SECREL32LSB 0x65 /* @secrel(sym+add), data4 LSB */
94 #define R_IA64_SECREL64MSB 0x66 /* @secrel(sym+add), data8 MSB */
95 #define R_IA64_SECREL64LSB 0x67 /* @secrel(sym+add), data8 LSB */
96 #define R_IA64_REL32MSB 0x6c /* data 4 + REL */
97 #define R_IA64_REL32LSB 0x6d /* data 4 + REL */
98 #define R_IA64_REL64MSB 0x6e /* data 8 + REL */
99 #define R_IA64_REL64LSB 0x6f /* data 8 + REL */
100 #define R_IA64_LTV32MSB 0x74 /* symbol + addend, data4 MSB */
101 #define R_IA64_LTV32LSB 0x75 /* symbol + addend, data4 LSB */
102 #define R_IA64_LTV64MSB 0x76 /* symbol + addend, data8 MSB */
103 #define R_IA64_LTV64LSB 0x77 /* symbol + addend, data8 LSB */
104 #define R_IA64_PCREL21BI 0x79 /* @pcrel(sym+add), ptb, call */
105 #define R_IA64_PCREL22 0x7a /* @pcrel(sym+add), imm22 */
106 #define R_IA64_PCREL64I 0x7b /* @pcrel(sym+add), imm64 */
107 #define R_IA64_IPLTMSB 0x80 /* dynamic reloc, imported PLT, MSB */
108 #define R_IA64_IPLTLSB 0x81 /* dynamic reloc, imported PLT, LSB */
109 #define R_IA64_COPY 0x84 /* dynamic reloc, data copy */
110 #define R_IA64_SUB 0x85 /* -symbol + addend, add imm22 */
111 #define R_IA64_LTOFF22X 0x86 /* LTOFF22, relaxable. */
112 #define R_IA64_LDXMOV 0x87 /* Use of LTOFF22X. */
113 #define R_IA64_TPREL14 0x91 /* @tprel(sym+add), add imm14 */
114 #define R_IA64_TPREL22 0x92 /* @tprel(sym+add), add imm22 */
115 #define R_IA64_TPREL64I 0x93 /* @tprel(sym+add), add imm64 */
116 #define R_IA64_TPREL64MSB 0x96 /* @tprel(sym+add), data8 MSB */
117 #define R_IA64_TPREL64LSB 0x97 /* @tprel(sym+add), data8 LSB */
118 #define R_IA64_LTOFF_TPREL22 0x9a /* @ltoff(@tprel(s+a)), add imm22 */
119 #define R_IA64_DTPMOD64MSB 0xa6 /* @dtpmod(sym+add), data8 MSB */
120 #define R_IA64_DTPMOD64LSB 0xa7 /* @dtpmod(sym+add), data8 LSB */
121 #define R_IA64_LTOFF_DTPMOD22 0xaa /* @ltoff(@dtpmod(s+a)), imm22 */
122 #define R_IA64_DTPREL14 0xb1 /* @dtprel(sym+add), imm14 */
123 #define R_IA64_DTPREL22 0xb2 /* @dtprel(sym+add), imm22 */
124 #define R_IA64_DTPREL64I 0xb3 /* @dtprel(sym+add), imm64 */
125 #define R_IA64_DTPREL32MSB 0xb4 /* @dtprel(sym+add), data4 MSB */
126 #define R_IA64_DTPREL32LSB 0xb5 /* @dtprel(sym+add), data4 LSB */
127 #define R_IA64_DTPREL64MSB 0xb6 /* @dtprel(sym+add), data8 MSB */
128 #define R_IA64_DTPREL64LSB 0xb7 /* @dtprel(sym+add), data8 LSB */
129 #define R_IA64_LTOFF_DTPREL22 0xba /* @ltoff(@dtprel(s+a)), imm22 */
130
131 /* IA-64 specific section flags: */
132 #define SHF_IA_64_SHORT 0x10000000 /* section near gp */
133
134 /*
135 * We use (abuse?) this macro to insert the (empty) vm_area that is
136 * used to map the register backing store. I don't see any better
137 * place to do this, but we should discuss this with Linus once we can
138 * talk to him...
139 */
140 extern void ia64_init_addr_space (void);
141 #define ELF_PLAT_INIT(_r, load_addr) ia64_init_addr_space()
142
143 /* ELF register definitions. This is needed for core dump support. */
144
145 /*
146 * elf_gregset_t contains the application-level state in the following order:
147 * r0-r31
148 * NaT bits (for r0-r31; bit N == 1 iff rN is a NaT)
149 * predicate registers (p0-p63)
150 * b0-b7
151 * ip cfm psr
152 * ar.rsc ar.bsp ar.bspstore ar.rnat
153 * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec ar.csd ar.ssd
154 */
155 #define ELF_NGREG 128 /* we really need just 72 but let's leave some headroom... */
156 #define ELF_NFPREG 128 /* f0 and f1 could be omitted, but so what... */
157
158 /* elf_gregset_t register offsets */
159 #define ELF_GR_0_OFFSET 0
160 #define ELF_NAT_OFFSET (32 * sizeof(elf_greg_t))
161 #define ELF_PR_OFFSET (33 * sizeof(elf_greg_t))
162 #define ELF_BR_0_OFFSET (34 * sizeof(elf_greg_t))
163 #define ELF_CR_IIP_OFFSET (42 * sizeof(elf_greg_t))
164 #define ELF_CFM_OFFSET (43 * sizeof(elf_greg_t))
165 #define ELF_CR_IPSR_OFFSET (44 * sizeof(elf_greg_t))
166 #define ELF_GR_OFFSET(i) (ELF_GR_0_OFFSET + i * sizeof(elf_greg_t))
167 #define ELF_BR_OFFSET(i) (ELF_BR_0_OFFSET + i * sizeof(elf_greg_t))
168 #define ELF_AR_RSC_OFFSET (45 * sizeof(elf_greg_t))
169 #define ELF_AR_BSP_OFFSET (46 * sizeof(elf_greg_t))
170 #define ELF_AR_BSPSTORE_OFFSET (47 * sizeof(elf_greg_t))
171 #define ELF_AR_RNAT_OFFSET (48 * sizeof(elf_greg_t))
172 #define ELF_AR_CCV_OFFSET (49 * sizeof(elf_greg_t))
173 #define ELF_AR_UNAT_OFFSET (50 * sizeof(elf_greg_t))
174 #define ELF_AR_FPSR_OFFSET (51 * sizeof(elf_greg_t))
175 #define ELF_AR_PFS_OFFSET (52 * sizeof(elf_greg_t))
176 #define ELF_AR_LC_OFFSET (53 * sizeof(elf_greg_t))
177 #define ELF_AR_EC_OFFSET (54 * sizeof(elf_greg_t))
178 #define ELF_AR_CSD_OFFSET (55 * sizeof(elf_greg_t))
179 #define ELF_AR_SSD_OFFSET (56 * sizeof(elf_greg_t))
180 #define ELF_AR_END_OFFSET (57 * sizeof(elf_greg_t))
181
182 typedef unsigned long elf_fpxregset_t;
183
184 typedef unsigned long elf_greg_t;
185 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
186
187 typedef struct ia64_fpreg elf_fpreg_t;
188 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
189
190
191
192 struct pt_regs; /* forward declaration... */
193 extern void ia64_elf_core_copy_regs (struct pt_regs *src, elf_gregset_t dst);
194 #define ELF_CORE_COPY_REGS(_dest,_regs) ia64_elf_core_copy_regs(_regs, _dest);
195
196 /* This macro yields a bitmask that programs can use to figure out
197 what instruction set this CPU supports. */
198 #define ELF_HWCAP 0
199
200 /* This macro yields a string that ld.so will use to load
201 implementation specific libraries for optimization. Not terribly
202 relevant until we have real hardware to play with... */
203 #define ELF_PLATFORM NULL
204
205 #define elf_read_implies_exec(ex, executable_stack) \
206 ((executable_stack!=EXSTACK_DISABLE_X) && ((ex).e_flags & EF_IA_64_LINUX_EXECUTABLE_STACK) != 0)
207
208 struct task_struct;
209
210 #define GATE_EHDR ((const struct elfhdr *) GATE_ADDR)
211
212 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
213 #define ARCH_DLINFO \
214 do { \
215 extern char __kernel_syscall_via_epc[]; \
216 NEW_AUX_ENT(AT_SYSINFO, (unsigned long) __kernel_syscall_via_epc); \
217 NEW_AUX_ENT(AT_SYSINFO_EHDR, (unsigned long) GATE_EHDR); \
218 } while (0)
219
220 /*
221 * format for entries in the Global Offset Table
222 */
223 struct got_entry {
224 uint64_t val;
225 };
226
227 /*
228 * Layout of the Function Descriptor
229 */
230 struct fdesc {
231 uint64_t ip;
232 uint64_t gp;
233 };
234
235 #endif /* _ASM_IA64_ELF_H */