1 /*
2  *  include/asm-s390/elf.h
3  *
4  *  S390 version
5  *
6  *  Derived from "include/asm-i386/elf.h"
7  */
8 
9 #ifndef __ASMS390_ELF_H
10 #define __ASMS390_ELF_H
11 
12 /* s390 relocations defined by the ABIs */
13 #define R_390_NONE		0	/* No reloc.  */
14 #define R_390_8			1	/* Direct 8 bit.  */
15 #define R_390_12		2	/* Direct 12 bit.  */
16 #define R_390_16		3	/* Direct 16 bit.  */
17 #define R_390_32		4	/* Direct 32 bit.  */
18 #define R_390_PC32		5	/* PC relative 32 bit.	*/
19 #define R_390_GOT12		6	/* 12 bit GOT offset.  */
20 #define R_390_GOT32		7	/* 32 bit GOT offset.  */
21 #define R_390_PLT32		8	/* 32 bit PC relative PLT address.  */
22 #define R_390_COPY		9	/* Copy symbol at runtime.  */
23 #define R_390_GLOB_DAT		10	/* Create GOT entry.  */
24 #define R_390_JMP_SLOT		11	/* Create PLT entry.  */
25 #define R_390_RELATIVE		12	/* Adjust by program base.  */
26 #define R_390_GOTOFF32		13	/* 32 bit offset to GOT.	 */
27 #define R_390_GOTPC		14	/* 32 bit PC rel. offset to GOT.  */
28 #define R_390_GOT16		15	/* 16 bit GOT offset.  */
29 #define R_390_PC16		16	/* PC relative 16 bit.	*/
30 #define R_390_PC16DBL		17	/* PC relative 16 bit shifted by 1.  */
31 #define R_390_PLT16DBL		18	/* 16 bit PC rel. PLT shifted by 1.  */
32 #define R_390_PC32DBL		19	/* PC relative 32 bit shifted by 1.  */
33 #define R_390_PLT32DBL		20	/* 32 bit PC rel. PLT shifted by 1.  */
34 #define R_390_GOTPCDBL		21	/* 32 bit PC rel. GOT shifted by 1.  */
35 #define R_390_64		22	/* Direct 64 bit.  */
36 #define R_390_PC64		23	/* PC relative 64 bit.	*/
37 #define R_390_GOT64		24	/* 64 bit GOT offset.  */
38 #define R_390_PLT64		25	/* 64 bit PC relative PLT address.  */
39 #define R_390_GOTENT		26	/* 32 bit PC rel. to GOT entry >> 1. */
40 #define R_390_GOTOFF16		27	/* 16 bit offset to GOT. */
41 #define R_390_GOTOFF64		28	/* 64 bit offset to GOT. */
42 #define R_390_GOTPLT12		29	/* 12 bit offset to jump slot.	*/
43 #define R_390_GOTPLT16		30	/* 16 bit offset to jump slot.	*/
44 #define R_390_GOTPLT32		31	/* 32 bit offset to jump slot.	*/
45 #define R_390_GOTPLT64		32	/* 64 bit offset to jump slot.	*/
46 #define R_390_GOTPLTENT		33	/* 32 bit rel. offset to jump slot.  */
47 #define R_390_PLTOFF16		34	/* 16 bit offset from GOT to PLT. */
48 #define R_390_PLTOFF32		35	/* 32 bit offset from GOT to PLT. */
49 #define R_390_PLTOFF64		36	/* 16 bit offset from GOT to PLT. */
50 #define R_390_TLS_LOAD		37	/* Tag for load insn in TLS code. */
51 #define R_390_TLS_GDCALL	38	/* Tag for function call in general
52                                            dynamic TLS code.  */
53 #define R_390_TLS_LDCALL	39	/* Tag for function call in local
54                                            dynamic TLS code.  */
55 #define R_390_TLS_GD32		40	/* Direct 32 bit for general dynamic
56                                            thread local data.  */
57 #define R_390_TLS_GD64		41	/* Direct 64 bit for general dynamic
58                                            thread local data.  */
59 #define R_390_TLS_GOTIE12	42	/* 12 bit GOT offset for static TLS
60                                            block offset.  */
61 #define R_390_TLS_GOTIE32	43	/* 32 bit GOT offset for static TLS
62                                            block offset.  */
63 #define R_390_TLS_GOTIE64	44	/* 64 bit GOT offset for static TLS
64                                            block offset.  */
65 #define R_390_TLS_LDM32		45	/* Direct 32 bit for local dynamic
66                                            thread local data in LD code.  */
67 #define R_390_TLS_LDM64		46	/* Direct 64 bit for local dynamic
68                                            thread local data in LD code.  */
69 #define R_390_TLS_IE32		47	/* 32 bit address of GOT entry for
70                                            negated static TLS block offset.  */
71 #define R_390_TLS_IE64		48	/* 64 bit address of GOT entry for
72                                            negated static TLS block offset.  */
73 #define R_390_TLS_IEENT		49	/* 32 bit rel. offset to GOT entry for
74                                            negated static TLS block offset.  */
75 #define R_390_TLS_LE32		50	/* 32 bit negated offset relative to
76                                            static TLS block.  */
77 #define R_390_TLS_LE64		51	/* 64 bit negated offset relative to
78                                            static TLS block.  */
79 #define R_390_TLS_LDO32		52	/* 32 bit offset relative to TLS
80                                            block.  */
81 #define R_390_TLS_LDO64		53	/* 64 bit offset relative to TLS
82                                            block.  */
83 #define R_390_TLS_DTPMOD	54	/* ID of module containing symbol.  */
84 #define R_390_TLS_DTPOFF	55	/* Offset in TLS block.  */
85 #define R_390_TLS_TPOFF		56	/* Negate offset in static TLS
86                                            block.  */
87 #define R_390_20		57	/* Direct 20 bit.  */
88 #define R_390_GOT20		58	/* 20 bit GOT offset.  */
89 #define R_390_GOTPLT20		59	/* 20 bit offset to jump slot.  */
90 #define R_390_TLS_GOTIE20	60	/* 20 bit GOT offset for static TLS
91 					   block offset.  */
92 /* Keep this the last entry.  */
93 #define R_390_NUM	61
94 
95 /* Bits present in AT_HWCAP. */
96 #define HWCAP_S390_ESAN3	1
97 #define HWCAP_S390_ZARCH	2
98 #define HWCAP_S390_STFLE	4
99 #define HWCAP_S390_MSA		8
100 #define HWCAP_S390_LDISP	16
101 #define HWCAP_S390_EIMM		32
102 #define HWCAP_S390_DFP		64
103 #define HWCAP_S390_HPAGE	128
104 #define HWCAP_S390_ETF3EH	256
105 #define HWCAP_S390_HIGH_GPRS	512
106 
107 /*
108  * These are used to set parameters in the core dumps.
109  */
110 #ifndef __s390x__
111 #define ELF_CLASS	ELFCLASS32
112 #else /* __s390x__ */
113 #define ELF_CLASS	ELFCLASS64
114 #endif /* __s390x__ */
115 #define ELF_DATA	ELFDATA2MSB
116 #define ELF_ARCH	EM_S390
117 
118 /*
119  * ELF register definitions..
120  */
121 
122 #include <asm/ptrace.h>
123 #include <asm/user.h>
124 
125 typedef s390_fp_regs elf_fpregset_t;
126 typedef s390_regs elf_gregset_t;
127 
128 typedef s390_fp_regs compat_elf_fpregset_t;
129 typedef s390_compat_regs compat_elf_gregset_t;
130 
131 #include <linux/sched.h>	/* for task_struct */
132 #include <asm/mmu_context.h>
133 
134 #include <asm/vdso.h>
135 
136 extern unsigned int vdso_enabled;
137 
138 /*
139  * This is used to ensure we don't load something for the wrong architecture.
140  */
141 #define elf_check_arch(x) \
142 	(((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
143          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
144 #define compat_elf_check_arch(x) \
145 	(((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
146 	 && (x)->e_ident[EI_CLASS] == ELF_CLASS)
147 #define compat_start_thread	start_thread31
148 
149 /* For SVR4/S390 the function pointer to be registered with `atexit` is
150    passed in R14. */
151 #define ELF_PLAT_INIT(_r, load_addr) \
152 	do { \
153 		_r->gprs[14] = 0; \
154 	} while (0)
155 
156 #define CORE_DUMP_USE_REGSET
157 #define ELF_EXEC_PAGESIZE	4096
158 
159 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
160    use of this is to invoke "./ld.so someprog" to test out a new version of
161    the loader.  We need to make sure that it is out of the way of the program
162    that it will "exec", and that there is sufficient room for the brk.  */
163 
164 extern unsigned long randomize_et_dyn(unsigned long base);
165 #define ELF_ET_DYN_BASE		(randomize_et_dyn(STACK_TOP / 3 * 2))
166 
167 /* This yields a mask that user programs can use to figure out what
168    instruction set this CPU supports. */
169 
170 extern unsigned long elf_hwcap;
171 #define ELF_HWCAP (elf_hwcap)
172 
173 /* This yields a string that ld.so will use to load implementation
174    specific libraries for optimization.  This is more specific in
175    intent than poking at uname or /proc/cpuinfo.
176 
177    For the moment, we have only optimizations for the Intel generations,
178    but that could change... */
179 
180 #define ELF_PLATFORM_SIZE 8
181 extern char elf_platform[];
182 #define ELF_PLATFORM (elf_platform)
183 
184 #ifndef __s390x__
185 #define SET_PERSONALITY(ex) set_personality(PER_LINUX)
186 #else /* __s390x__ */
187 #define SET_PERSONALITY(ex)					\
188 do {								\
189 	if (personality(current->personality) != PER_LINUX32)	\
190 		set_personality(PER_LINUX |			\
191 			(current->personality & ~PER_MASK));	\
192 	if ((ex).e_ident[EI_CLASS] == ELFCLASS32)		\
193 		set_thread_flag(TIF_31BIT);			\
194 	else							\
195 		clear_thread_flag(TIF_31BIT);			\
196 } while (0)
197 #endif /* __s390x__ */
198 
199 #define STACK_RND_MASK	0x7ffUL
200 
201 #define ARCH_DLINFO							    \
202 do {									    \
203 	if (vdso_enabled)						    \
204 		NEW_AUX_ENT(AT_SYSINFO_EHDR,				    \
205 			    (unsigned long)current->mm->context.vdso_base); \
206 } while (0)
207 
208 struct linux_binprm;
209 
210 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
211 int arch_setup_additional_pages(struct linux_binprm *, int);
212 
213 extern unsigned long arch_randomize_brk(struct mm_struct *mm);
214 #define arch_randomize_brk arch_randomize_brk
215 
216 #endif
217