1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * S390 version
4 *
5 * Derived from "include/asm-i386/elf.h"
6 */
7
8 #ifndef __ASMS390_ELF_H
9 #define __ASMS390_ELF_H
10
11 /* s390 relocations defined by the ABIs */
12 #define R_390_NONE 0 /* No reloc. */
13 #define R_390_8 1 /* Direct 8 bit. */
14 #define R_390_12 2 /* Direct 12 bit. */
15 #define R_390_16 3 /* Direct 16 bit. */
16 #define R_390_32 4 /* Direct 32 bit. */
17 #define R_390_PC32 5 /* PC relative 32 bit. */
18 #define R_390_GOT12 6 /* 12 bit GOT offset. */
19 #define R_390_GOT32 7 /* 32 bit GOT offset. */
20 #define R_390_PLT32 8 /* 32 bit PC relative PLT address. */
21 #define R_390_COPY 9 /* Copy symbol at runtime. */
22 #define R_390_GLOB_DAT 10 /* Create GOT entry. */
23 #define R_390_JMP_SLOT 11 /* Create PLT entry. */
24 #define R_390_RELATIVE 12 /* Adjust by program base. */
25 #define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */
26 #define R_390_GOTPC 14 /* 32 bit PC rel. offset to GOT. */
27 #define R_390_GOT16 15 /* 16 bit GOT offset. */
28 #define R_390_PC16 16 /* PC relative 16 bit. */
29 #define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */
30 #define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */
31 #define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */
32 #define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */
33 #define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */
34 #define R_390_64 22 /* Direct 64 bit. */
35 #define R_390_PC64 23 /* PC relative 64 bit. */
36 #define R_390_GOT64 24 /* 64 bit GOT offset. */
37 #define R_390_PLT64 25 /* 64 bit PC relative PLT address. */
38 #define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */
39 #define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */
40 #define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */
41 #define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */
42 #define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */
43 #define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */
44 #define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */
45 #define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */
46 #define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */
47 #define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */
48 #define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */
49 #define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */
50 #define R_390_TLS_GDCALL 38 /* Tag for function call in general
51 dynamic TLS code. */
52 #define R_390_TLS_LDCALL 39 /* Tag for function call in local
53 dynamic TLS code. */
54 #define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic
55 thread local data. */
56 #define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic
57 thread local data. */
58 #define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS
59 block offset. */
60 #define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS
61 block offset. */
62 #define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS
63 block offset. */
64 #define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic
65 thread local data in LD code. */
66 #define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic
67 thread local data in LD code. */
68 #define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for
69 negated static TLS block offset. */
70 #define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for
71 negated static TLS block offset. */
72 #define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for
73 negated static TLS block offset. */
74 #define R_390_TLS_LE32 50 /* 32 bit negated offset relative to
75 static TLS block. */
76 #define R_390_TLS_LE64 51 /* 64 bit negated offset relative to
77 static TLS block. */
78 #define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS
79 block. */
80 #define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS
81 block. */
82 #define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */
83 #define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */
84 #define R_390_TLS_TPOFF 56 /* Negate offset in static TLS
85 block. */
86 #define R_390_20 57 /* Direct 20 bit. */
87 #define R_390_GOT20 58 /* 20 bit GOT offset. */
88 #define R_390_GOTPLT20 59 /* 20 bit offset to jump slot. */
89 #define R_390_TLS_GOTIE20 60 /* 20 bit GOT offset for static TLS
90 block offset. */
91 /* Keep this the last entry. */
92 #define R_390_NUM 61
93
94 /* Bits present in AT_HWCAP. */
95 #define HWCAP_S390_ESAN3 1
96 #define HWCAP_S390_ZARCH 2
97 #define HWCAP_S390_STFLE 4
98 #define HWCAP_S390_MSA 8
99 #define HWCAP_S390_LDISP 16
100 #define HWCAP_S390_EIMM 32
101 #define HWCAP_S390_DFP 64
102 #define HWCAP_S390_HPAGE 128
103 #define HWCAP_S390_ETF3EH 256
104 #define HWCAP_S390_HIGH_GPRS 512
105 #define HWCAP_S390_TE 1024
106 #define HWCAP_S390_VXRS 2048
107 #define HWCAP_S390_VXRS_BCD 4096
108 #define HWCAP_S390_VXRS_EXT 8192
109 #define HWCAP_S390_GS 16384
110 #define HWCAP_S390_VXRS_EXT2 32768
111 #define HWCAP_S390_VXRS_PDE 65536
112 #define HWCAP_S390_SORT 131072
113 #define HWCAP_S390_DFLT 262144
114
115 /* Internal bits, not exposed via elf */
116 #define HWCAP_INT_SIE 1UL
117
118 /*
119 * These are used to set parameters in the core dumps.
120 */
121 #define ELF_CLASS ELFCLASS64
122 #define ELF_DATA ELFDATA2MSB
123 #define ELF_ARCH EM_S390
124
125 /* s390 specific phdr types */
126 #define PT_S390_PGSTE 0x70000000
127
128 /*
129 * ELF register definitions..
130 */
131
132 #include <linux/compat.h>
133
134 #include <asm/ptrace.h>
135 #include <asm/syscall.h>
136 #include <asm/user.h>
137
138 typedef s390_fp_regs elf_fpregset_t;
139 typedef s390_regs elf_gregset_t;
140
141 typedef s390_fp_regs compat_elf_fpregset_t;
142 typedef s390_compat_regs compat_elf_gregset_t;
143
144 #include <linux/sched/mm.h> /* for task_struct */
145 #include <asm/mmu_context.h>
146
147 #include <asm/vdso.h>
148
149 extern unsigned int vdso_enabled;
150
151 /*
152 * This is used to ensure we don't load something for the wrong architecture.
153 */
154 #define elf_check_arch(x) \
155 (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
156 && (x)->e_ident[EI_CLASS] == ELF_CLASS)
157 #define compat_elf_check_arch(x) \
158 (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
159 && (x)->e_ident[EI_CLASS] == ELF_CLASS)
160 #define compat_start_thread start_thread31
161
162 struct arch_elf_state {
163 int rc;
164 };
165
166 #define INIT_ARCH_ELF_STATE { .rc = 0 }
167
168 #define arch_check_elf(ehdr, interp, interp_ehdr, state) (0)
169 #ifdef CONFIG_PGSTE
170 #define arch_elf_pt_proc(ehdr, phdr, elf, interp, state) \
171 ({ \
172 struct arch_elf_state *_state = state; \
173 if ((phdr)->p_type == PT_S390_PGSTE && \
174 !page_table_allocate_pgste && \
175 !test_thread_flag(TIF_PGSTE) && \
176 !current->mm->context.alloc_pgste) { \
177 set_thread_flag(TIF_PGSTE); \
178 set_pt_regs_flag(task_pt_regs(current), \
179 PIF_SYSCALL_RESTART); \
180 _state->rc = -EAGAIN; \
181 } \
182 _state->rc; \
183 })
184 #else
185 #define arch_elf_pt_proc(ehdr, phdr, elf, interp, state) \
186 ({ \
187 (state)->rc; \
188 })
189 #endif
190
191 /* For SVR4/S390 the function pointer to be registered with `atexit` is
192 passed in R14. */
193 #define ELF_PLAT_INIT(_r, load_addr) \
194 do { \
195 _r->gprs[14] = 0; \
196 } while (0)
197
198 #define CORE_DUMP_USE_REGSET
199 #define ELF_EXEC_PAGESIZE PAGE_SIZE
200
201 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
202 use of this is to invoke "./ld.so someprog" to test out a new version of
203 the loader. We need to make sure that it is out of the way of the program
204 that it will "exec", and that there is sufficient room for the brk. 64-bit
205 tasks are aligned to 4GB. */
206 #define ELF_ET_DYN_BASE (is_compat_task() ? \
207 (STACK_TOP / 3 * 2) : \
208 (STACK_TOP / 3 * 2) & ~((1UL << 32) - 1))
209
210 /* This yields a mask that user programs can use to figure out what
211 instruction set this CPU supports. */
212
213 extern unsigned long elf_hwcap;
214 #define ELF_HWCAP (elf_hwcap)
215
216 /* Internal hardware capabilities, not exposed via elf */
217
218 extern unsigned long int_hwcap;
219
220 /* This yields a string that ld.so will use to load implementation
221 specific libraries for optimization. This is more specific in
222 intent than poking at uname or /proc/cpuinfo.
223
224 For the moment, we have only optimizations for the Intel generations,
225 but that could change... */
226
227 #define ELF_PLATFORM_SIZE 8
228 extern char elf_platform[];
229 #define ELF_PLATFORM (elf_platform)
230
231 #ifndef CONFIG_COMPAT
232 #define SET_PERSONALITY(ex) \
233 do { \
234 set_personality(PER_LINUX | \
235 (current->personality & (~PER_MASK))); \
236 current->thread.sys_call_table = \
237 (unsigned long) &sys_call_table; \
238 } while (0)
239 #else /* CONFIG_COMPAT */
240 #define SET_PERSONALITY(ex) \
241 do { \
242 if (personality(current->personality) != PER_LINUX32) \
243 set_personality(PER_LINUX | \
244 (current->personality & ~PER_MASK)); \
245 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \
246 set_thread_flag(TIF_31BIT); \
247 current->thread.sys_call_table = \
248 (unsigned long) &sys_call_table_emu; \
249 } else { \
250 clear_thread_flag(TIF_31BIT); \
251 current->thread.sys_call_table = \
252 (unsigned long) &sys_call_table; \
253 } \
254 } while (0)
255 #endif /* CONFIG_COMPAT */
256
257 /*
258 * Cache aliasing on the latest machines calls for a mapping granularity
259 * of 512KB for the anonymous mapping base. For 64-bit processes use a
260 * 512KB alignment and a randomization of up to 1GB. For 31-bit processes
261 * the virtual address space is limited, use no alignment and limit the
262 * randomization to 8MB.
263 * For the additional randomization of the program break use 32MB for
264 * 64-bit and 8MB for 31-bit.
265 */
266 #define BRK_RND_MASK (is_compat_task() ? 0x7ffUL : 0x1fffUL)
267 #define MMAP_RND_MASK (is_compat_task() ? 0x7ffUL : 0x3ff80UL)
268 #define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL)
269 #define STACK_RND_MASK MMAP_RND_MASK
270
271 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
272 #define ARCH_DLINFO \
273 do { \
274 if (vdso_enabled) \
275 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
276 (unsigned long)current->mm->context.vdso_base); \
277 } while (0)
278
279 struct linux_binprm;
280
281 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
282 int arch_setup_additional_pages(struct linux_binprm *, int);
283
284 #endif