/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_ELF_H
#define __ASM_SH_ELF_H

#include <linux/utsname.h>
#include <asm/auxvec.h>
#include <asm/ptrace.h>
#include <asm/user.h>

/* ELF header e_flags defines */
#define EF_SH_PIC               0x100   /* -fpic */
#define EF_SH_FDPIC             0x8000  /* -mfdpic */

/* SH (particularly SHcompact) relocation types  */
#define R_SH_NONE               0
#define R_SH_DIR32              1
#define R_SH_REL32              2
#define R_SH_DIR8WPN            3
#define R_SH_IND12W             4
#define R_SH_DIR8WPL            5
#define R_SH_DIR8WPZ            6
#define R_SH_DIR8BP             7
#define R_SH_DIR8W              8
#define R_SH_DIR8L              9
#define R_SH_SWITCH16           25
#define R_SH_SWITCH32           26
#define R_SH_USES               27
#define R_SH_COUNT              28
#define R_SH_ALIGN              29
#define R_SH_CODE               30
#define R_SH_DATA               31
#define R_SH_LABEL              32
#define R_SH_SWITCH8            33
#define R_SH_GNU_VTINHERIT      34
#define R_SH_GNU_VTENTRY        35
#define R_SH_TLS_GD_32          144
#define R_SH_TLS_LD_32          145
#define R_SH_TLS_LDO_32         146
#define R_SH_TLS_IE_32          147
#define R_SH_TLS_LE_32          148
#define R_SH_TLS_DTPMOD32       149
#define R_SH_TLS_DTPOFF32       150
#define R_SH_TLS_TPOFF32        151
#define R_SH_GOT32              160
#define R_SH_PLT32              161
#define R_SH_COPY               162
#define R_SH_GLOB_DAT           163
#define R_SH_JMP_SLOT           164
#define R_SH_RELATIVE           165
#define R_SH_GOTOFF             166
#define R_SH_GOTPC              167

/* FDPIC relocs */
#define R_SH_GOT20              201
#define R_SH_GOTOFF20           202
#define R_SH_GOTFUNCDESC        203
#define R_SH_GOTFUNCDESC20      204
#define R_SH_GOTOFFFUNCDESC     205
#define R_SH_GOTOFFFUNCDESC20   206
#define R_SH_FUNCDESC           207
#define R_SH_FUNCDESC_VALUE     208

/* SHmedia relocs */
#define R_SH_IMM_LOW16          246
#define R_SH_IMM_LOW16_PCREL    247
#define R_SH_IMM_MEDLOW16       248
#define R_SH_IMM_MEDLOW16_PCREL 249
/* Keep this the last entry.  */
#define R_SH_NUM                256

/*
 * ELF register definitions..
 */

typedef unsigned long elf_greg_t;

#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
typedef elf_greg_t elf_gregset_t[ELF_NGREG];

typedef struct user_fpu_struct elf_fpregset_t;

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_CLASS       ELFCLASS32
#ifdef __LITTLE_ENDIAN__
#define ELF_DATA        ELFDATA2LSB
#else
#define ELF_DATA        ELFDATA2MSB
#endif
#define ELF_ARCH        EM_SH

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(x)               ((x)->e_machine == EM_SH)
#define elf_check_fdpic(x)              ((x)->e_flags & EF_SH_FDPIC)
#define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)

/*
 * Enable dump using regset.
 * This covers all of general/DSP/FPU regs.
 */
#define CORE_DUMP_USE_REGSET

#define ELF_FDPIC_CORE_EFLAGS   EF_SH_FDPIC
#define ELF_EXEC_PAGESIZE       PAGE_SIZE

/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
   use of this is to invoke "./ld.so someprog" to test out a new version of
   the loader.  We need to make sure that it is out of the way of the program
   that it will "exec", and that there is sufficient room for the brk.  */

#define ELF_ET_DYN_BASE         (2 * TASK_SIZE / 3)

#define ELF_CORE_COPY_REGS(_dest,_regs)                         \
        memcpy((char *) &_dest, (char *) _regs,                 \
               sizeof(struct pt_regs));

/* This yields a mask that user programs can use to figure out what
   instruction set this CPU supports.  This could be done in user space,
   but it's not easy, and we've already done it here.  */

#define ELF_HWCAP       (boot_cpu_data.flags)

/* This yields a string that ld.so will use to load implementation
   specific libraries for optimization.  This is more specific in
   intent than poking at uname or /proc/cpuinfo.

   For the moment, we have only optimizations for the Intel generations,
   but that could change... */

#define ELF_PLATFORM    (utsname()->machine)

#define ELF_PLAT_INIT(_r, load_addr) \
  do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \
       _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \
       _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \
       _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \
       _r->sr = SR_FD; } while (0)

#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr,       \
                            _dynamic_addr)                              \
do {                                                                    \
        _r->regs[0]     = 0;                                            \
        _r->regs[1]     = 0;                                            \
        _r->regs[2]     = 0;                                            \
        _r->regs[3]     = 0;                                            \
        _r->regs[4]     = 0;                                            \
        _r->regs[5]     = 0;                                            \
        _r->regs[6]     = 0;                                            \
        _r->regs[7]     = 0;                                            \
        _r->regs[8]     = _exec_map_addr;                               \
        _r->regs[9]     = _interp_map_addr;                             \
        _r->regs[10]    = _dynamic_addr;                                \
        _r->regs[11]    = 0;                                            \
        _r->regs[12]    = 0;                                            \
        _r->regs[13]    = 0;                                            \
        _r->regs[14]    = 0;                                            \
        _r->sr          = SR_FD;                                        \
} while (0)

#define SET_PERSONALITY(ex) \
        set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))

#ifdef CONFIG_VSYSCALL
/* vDSO has arch_setup_additional_pages */
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
                                       int uses_interp);

extern unsigned int vdso_enabled;
extern void __kernel_vsyscall;

#define VDSO_BASE               ((unsigned long)current->mm->context.vdso)
#define VDSO_SYM(x)             (VDSO_BASE + (unsigned long)(x))

#define VSYSCALL_AUX_ENT                                        \
        if (vdso_enabled)                                       \
                NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE);        \
        else                                                    \
                NEW_AUX_ENT(AT_IGNORE, 0)
#else
#define VSYSCALL_AUX_ENT        NEW_AUX_ENT(AT_IGNORE, 0)
#endif /* CONFIG_VSYSCALL */

#ifdef CONFIG_SH_FPU
#define FPU_AUX_ENT     NEW_AUX_ENT(AT_FPUCW, FPSCR_INIT)
#else
#define FPU_AUX_ENT     NEW_AUX_ENT(AT_IGNORE, 0)
#endif

extern int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;

/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO                                             \
do {                                                            \
        /* Optional FPU initialization */                       \
        FPU_AUX_ENT;                                            \
                                                                \
        /* Optional vsyscall entry */                           \
        VSYSCALL_AUX_ENT;                                       \
                                                                \
        /* Cache desc */                                        \
        NEW_AUX_ENT(AT_L1I_CACHESHAPE, l1i_cache_shape);        \
        NEW_AUX_ENT(AT_L1D_CACHESHAPE, l1d_cache_shape);        \
        NEW_AUX_ENT(AT_L2_CACHESHAPE, l2_cache_shape);          \
} while (0)

#endif /* __ASM_SH_ELF_H */