elf.h

  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/*
 95 * HWCAP flags - for AT_HWCAP
 96 *
 97 * Bits 32-63 are reserved for use by libc.
 98 * Bit 31 is reserved and will be used by libc to determine if a second
 99 * argument is passed to IFUNC resolvers. This will be implemented when
100 * there is a need for AT_HWCAP2.
101 */
102enum {
103	HWCAP_NR_ESAN3		= 0,
104	HWCAP_NR_ZARCH		= 1,
105	HWCAP_NR_STFLE		= 2,
106	HWCAP_NR_MSA		= 3,
107	HWCAP_NR_LDISP		= 4,
108	HWCAP_NR_EIMM		= 5,
109	HWCAP_NR_DFP		= 6,
110	HWCAP_NR_HPAGE		= 7,
111	HWCAP_NR_ETF3EH		= 8,
112	HWCAP_NR_HIGH_GPRS	= 9,
113	HWCAP_NR_TE		= 10,
114	HWCAP_NR_VXRS		= 11,
115	HWCAP_NR_VXRS_BCD	= 12,
116	HWCAP_NR_VXRS_EXT	= 13,
117	HWCAP_NR_GS		= 14,
118	HWCAP_NR_VXRS_EXT2	= 15,
119	HWCAP_NR_VXRS_PDE	= 16,
120	HWCAP_NR_SORT		= 17,
121	HWCAP_NR_DFLT		= 18,
122	HWCAP_NR_VXRS_PDE2	= 19,
123	HWCAP_NR_NNPA		= 20,
124	HWCAP_NR_PCI_MIO	= 21,
125	HWCAP_NR_SIE		= 22,
126	HWCAP_NR_MAX
127};
128
129/* Bits present in AT_HWCAP. */
130#define HWCAP_ESAN3		BIT(HWCAP_NR_ESAN3)
131#define HWCAP_ZARCH		BIT(HWCAP_NR_ZARCH)
132#define HWCAP_STFLE		BIT(HWCAP_NR_STFLE)
133#define HWCAP_MSA		BIT(HWCAP_NR_MSA)
134#define HWCAP_LDISP		BIT(HWCAP_NR_LDISP)
135#define HWCAP_EIMM		BIT(HWCAP_NR_EIMM)
136#define HWCAP_DFP		BIT(HWCAP_NR_DFP)
137#define HWCAP_HPAGE		BIT(HWCAP_NR_HPAGE)
138#define HWCAP_ETF3EH		BIT(HWCAP_NR_ETF3EH)
139#define HWCAP_HIGH_GPRS		BIT(HWCAP_NR_HIGH_GPRS)
140#define HWCAP_TE		BIT(HWCAP_NR_TE)
141#define HWCAP_VXRS		BIT(HWCAP_NR_VXRS)
142#define HWCAP_VXRS_BCD		BIT(HWCAP_NR_VXRS_BCD)
143#define HWCAP_VXRS_EXT		BIT(HWCAP_NR_VXRS_EXT)
144#define HWCAP_GS		BIT(HWCAP_NR_GS)
145#define HWCAP_VXRS_EXT2		BIT(HWCAP_NR_VXRS_EXT2)
146#define HWCAP_VXRS_PDE		BIT(HWCAP_NR_VXRS_PDE)
147#define HWCAP_SORT		BIT(HWCAP_NR_SORT)
148#define HWCAP_DFLT		BIT(HWCAP_NR_DFLT)
149#define HWCAP_VXRS_PDE2		BIT(HWCAP_NR_VXRS_PDE2)
150#define HWCAP_NNPA		BIT(HWCAP_NR_NNPA)
151#define HWCAP_PCI_MIO		BIT(HWCAP_NR_PCI_MIO)
152#define HWCAP_SIE		BIT(HWCAP_NR_SIE)
153
154/*
155 * These are used to set parameters in the core dumps.
156 */
157#define ELF_CLASS	ELFCLASS64
158#define ELF_DATA	ELFDATA2MSB
159#define ELF_ARCH	EM_S390
160
161/*
162 * ELF register definitions..
163 */
164
165#include <asm/ptrace.h>
166#include <asm/syscall.h>
167#include <asm/user.h>
168
169typedef s390_fp_regs elf_fpregset_t;
170typedef s390_regs elf_gregset_t;
171
172#include <linux/sched/mm.h>	/* for task_struct */
173#include <asm/mmu_context.h>
174
175/*
176 * This is used to ensure we don't load something for the wrong architecture.
177 */
178#define elf_check_arch(x) \
179	(((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
180         && (x)->e_ident[EI_CLASS] == ELF_CLASS) 
181
182/* For SVR4/S390 the function pointer to be registered with `atexit` is
183   passed in R14. */
184#define ELF_PLAT_INIT(_r, load_addr) \
185	do { \
186		_r->gprs[14] = 0; \
187	} while (0)
188
189#define CORE_DUMP_USE_REGSET
190#define ELF_EXEC_PAGESIZE	PAGE_SIZE
191
192/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
193   use of this is to invoke "./ld.so someprog" to test out a new version of
194   the loader.  We need to make sure that it is out of the way of the program
195   that it will "exec", and that there is sufficient room for the brk. 64-bit
196   tasks are aligned to 4GB. */
197#define ELF_ET_DYN_BASE ((STACK_TOP / 3 * 2) & ~((1UL << 32) - 1))
198
199/* This yields a mask that user programs can use to figure out what
200   instruction set this CPU supports. */
201
202extern unsigned long elf_hwcap;
203#define ELF_HWCAP (elf_hwcap)
204
205/* This yields a string that ld.so will use to load implementation
206   specific libraries for optimization.  This is more specific in
207   intent than poking at uname or /proc/cpuinfo.
208
209   For the moment, we have only optimizations for the Intel generations,
210   but that could change... */
211
212#define ELF_PLATFORM_SIZE 8
213extern char elf_platform[];
214#define ELF_PLATFORM (elf_platform)
215
216#define SET_PERSONALITY(ex) \
217do {								\
218	set_personality(PER_LINUX |				\
219		(current->personality & (~PER_MASK)));		\
220} while (0)
221
222/*
223 * Cache aliasing on the latest machines calls for a mapping granularity
224 * of 512KB for the anonymous mapping base. Use a 512KB alignment and a
225 * randomization of up to 1GB.
226 * For the additional randomization of the program break use 32MB.
227 */
228#define BRK_RND_MASK	(0x1fffUL)
229#define MMAP_RND_MASK	(0x3ff80UL)
230#define MMAP_ALIGN_MASK	(0x7fUL)
231#define STACK_RND_MASK	MMAP_RND_MASK
232
233/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
234#define ARCH_DLINFO							\
235do {									\
236	NEW_AUX_ENT(AT_SYSINFO_EHDR,					\
237		    (unsigned long)current->mm->context.vdso_base);	\
238} while (0)
239
240struct linux_binprm;
241
242#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
243int arch_setup_additional_pages(struct linux_binprm *, int);
244
245#endif