root/arch/parisc/include/asm/elf.h 
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASMPARISC_ELF_H
#define __ASMPARISC_ELF_H

/*
 * ELF register definitions..
 */

#include <linux/types.h>

#define EM_PARISC 15

/* HPPA specific definitions.  */

/* Legal values for e_flags field of Elf32_Ehdr.  */

#define EF_PARISC_TRAPNIL       0x00010000 /* Trap nil pointer dereference.  */
#define EF_PARISC_EXT           0x00020000 /* Program uses arch. extensions. */
#define EF_PARISC_LSB           0x00040000 /* Program expects little endian. */
#define EF_PARISC_WIDE          0x00080000 /* Program expects wide mode.  */
#define EF_PARISC_NO_KABP       0x00100000 /* No kernel assisted branch
                                              prediction.  */
#define EF_PARISC_LAZYSWAP      0x00400000 /* Allow lazy swapping.  */
#define EF_PARISC_ARCH          0x0000ffff /* Architecture version.  */

/* Defined values for `e_flags & EF_PARISC_ARCH' are:  */

#define EFA_PARISC_1_0              0x020b /* PA-RISC 1.0 big-endian.  */
#define EFA_PARISC_1_1              0x0210 /* PA-RISC 1.1 big-endian.  */
#define EFA_PARISC_2_0              0x0214 /* PA-RISC 2.0 big-endian.  */

/* Additional section indices.  */

#define SHN_PARISC_ANSI_COMMON  0xff00     /* Section for tenatively declared
                                              symbols in ANSI C.  */
#define SHN_PARISC_HUGE_COMMON  0xff01     /* Common blocks in huge model.  */

/* Legal values for sh_type field of Elf32_Shdr.  */

#define SHT_PARISC_EXT          0x70000000 /* Contains product specific ext. */
#define SHT_PARISC_UNWIND       0x70000001 /* Unwind information.  */
#define SHT_PARISC_DOC          0x70000002 /* Debug info for optimized code. */

/* Legal values for sh_flags field of Elf32_Shdr.  */

#define SHF_PARISC_SHORT        0x20000000 /* Section with short addressing. */
#define SHF_PARISC_HUGE         0x40000000 /* Section far from gp.  */
#define SHF_PARISC_SBP          0x80000000 /* Static branch prediction code. */

/* Legal values for ST_TYPE subfield of st_info (symbol type).  */

#define STT_PARISC_MILLICODE    13      /* Millicode function entry point.  */

#define STT_HP_OPAQUE           (STT_LOOS + 0x1)
#define STT_HP_STUB             (STT_LOOS + 0x2)

/* HPPA relocs.  */

#define R_PARISC_NONE           0       /* No reloc.  */
#define R_PARISC_DIR32          1       /* Direct 32-bit reference.  */
#define R_PARISC_DIR21L         2       /* Left 21 bits of eff. address.  */
#define R_PARISC_DIR17R         3       /* Right 17 bits of eff. address.  */
#define R_PARISC_DIR17F         4       /* 17 bits of eff. address.  */
#define R_PARISC_DIR14R         6       /* Right 14 bits of eff. address.  */
#define R_PARISC_PCREL32        9       /* 32-bit rel. address.  */
#define R_PARISC_PCREL21L       10      /* Left 21 bits of rel. address.  */
#define R_PARISC_PCREL17R       11      /* Right 17 bits of rel. address.  */
#define R_PARISC_PCREL17F       12      /* 17 bits of rel. address.  */
#define R_PARISC_PCREL14R       14      /* Right 14 bits of rel. address.  */
#define R_PARISC_DPREL21L       18      /* Left 21 bits of rel. address.  */
#define R_PARISC_DPREL14R       22      /* Right 14 bits of rel. address.  */
#define R_PARISC_GPREL21L       26      /* GP-relative, left 21 bits.  */
#define R_PARISC_GPREL14R       30      /* GP-relative, right 14 bits.  */
#define R_PARISC_LTOFF21L       34      /* LT-relative, left 21 bits.  */
#define R_PARISC_LTOFF14R       38      /* LT-relative, right 14 bits.  */
#define R_PARISC_SECREL32       41      /* 32 bits section rel. address.  */
#define R_PARISC_SEGBASE        48      /* No relocation, set segment base.  */
#define R_PARISC_SEGREL32       49      /* 32 bits segment rel. address.  */
#define R_PARISC_PLTOFF21L      50      /* PLT rel. address, left 21 bits.  */
#define R_PARISC_PLTOFF14R      54      /* PLT rel. address, right 14 bits.  */
#define R_PARISC_LTOFF_FPTR32   57      /* 32 bits LT-rel. function pointer. */
#define R_PARISC_LTOFF_FPTR21L  58      /* LT-rel. fct ptr, left 21 bits. */
#define R_PARISC_LTOFF_FPTR14R  62      /* LT-rel. fct ptr, right 14 bits. */
#define R_PARISC_FPTR64         64      /* 64 bits function address.  */
#define R_PARISC_PLABEL32       65      /* 32 bits function address.  */
#define R_PARISC_PCREL64        72      /* 64 bits PC-rel. address.  */
#define R_PARISC_PCREL22F       74      /* 22 bits PC-rel. address.  */
#define R_PARISC_PCREL14WR      75      /* PC-rel. address, right 14 bits.  */
#define R_PARISC_PCREL14DR      76      /* PC rel. address, right 14 bits.  */
#define R_PARISC_PCREL16F       77      /* 16 bits PC-rel. address.  */
#define R_PARISC_PCREL16WF      78      /* 16 bits PC-rel. address.  */
#define R_PARISC_PCREL16DF      79      /* 16 bits PC-rel. address.  */
#define R_PARISC_DIR64          80      /* 64 bits of eff. address.  */
#define R_PARISC_DIR14WR        83      /* 14 bits of eff. address.  */
#define R_PARISC_DIR14DR        84      /* 14 bits of eff. address.  */
#define R_PARISC_DIR16F         85      /* 16 bits of eff. address.  */
#define R_PARISC_DIR16WF        86      /* 16 bits of eff. address.  */
#define R_PARISC_DIR16DF        87      /* 16 bits of eff. address.  */
#define R_PARISC_GPREL64        88      /* 64 bits of GP-rel. address.  */
#define R_PARISC_GPREL14WR      91      /* GP-rel. address, right 14 bits.  */
#define R_PARISC_GPREL14DR      92      /* GP-rel. address, right 14 bits.  */
#define R_PARISC_GPREL16F       93      /* 16 bits GP-rel. address.  */
#define R_PARISC_GPREL16WF      94      /* 16 bits GP-rel. address.  */
#define R_PARISC_GPREL16DF      95      /* 16 bits GP-rel. address.  */
#define R_PARISC_LTOFF64        96      /* 64 bits LT-rel. address.  */
#define R_PARISC_LTOFF14WR      99      /* LT-rel. address, right 14 bits.  */
#define R_PARISC_LTOFF14DR      100     /* LT-rel. address, right 14 bits.  */
#define R_PARISC_LTOFF16F       101     /* 16 bits LT-rel. address.  */
#define R_PARISC_LTOFF16WF      102     /* 16 bits LT-rel. address.  */
#define R_PARISC_LTOFF16DF      103     /* 16 bits LT-rel. address.  */
#define R_PARISC_SECREL64       104     /* 64 bits section rel. address.  */
#define R_PARISC_SEGREL64       112     /* 64 bits segment rel. address.  */
#define R_PARISC_PLTOFF14WR     115     /* PLT-rel. address, right 14 bits.  */
#define R_PARISC_PLTOFF14DR     116     /* PLT-rel. address, right 14 bits.  */
#define R_PARISC_PLTOFF16F      117     /* 16 bits LT-rel. address.  */
#define R_PARISC_PLTOFF16WF     118     /* 16 bits PLT-rel. address.  */
#define R_PARISC_PLTOFF16DF     119     /* 16 bits PLT-rel. address.  */
#define R_PARISC_LTOFF_FPTR64   120     /* 64 bits LT-rel. function ptr.  */
#define R_PARISC_LTOFF_FPTR14WR 123     /* LT-rel. fct. ptr., right 14 bits. */
#define R_PARISC_LTOFF_FPTR14DR 124     /* LT-rel. fct. ptr., right 14 bits. */
#define R_PARISC_LTOFF_FPTR16F  125     /* 16 bits LT-rel. function ptr.  */
#define R_PARISC_LTOFF_FPTR16WF 126     /* 16 bits LT-rel. function ptr.  */
#define R_PARISC_LTOFF_FPTR16DF 127     /* 16 bits LT-rel. function ptr.  */
#define R_PARISC_LORESERVE      128
#define R_PARISC_COPY           128     /* Copy relocation.  */
#define R_PARISC_IPLT           129     /* Dynamic reloc, imported PLT */
#define R_PARISC_EPLT           130     /* Dynamic reloc, exported PLT */
#define R_PARISC_TPREL32        153     /* 32 bits TP-rel. address.  */
#define R_PARISC_TPREL21L       154     /* TP-rel. address, left 21 bits.  */
#define R_PARISC_TPREL14R       158     /* TP-rel. address, right 14 bits.  */
#define R_PARISC_LTOFF_TP21L    162     /* LT-TP-rel. address, left 21 bits. */
#define R_PARISC_LTOFF_TP14R    166     /* LT-TP-rel. address, right 14 bits.*/
#define R_PARISC_LTOFF_TP14F    167     /* 14 bits LT-TP-rel. address.  */
#define R_PARISC_TPREL64        216     /* 64 bits TP-rel. address.  */
#define R_PARISC_TPREL14WR      219     /* TP-rel. address, right 14 bits.  */
#define R_PARISC_TPREL14DR      220     /* TP-rel. address, right 14 bits.  */
#define R_PARISC_TPREL16F       221     /* 16 bits TP-rel. address.  */
#define R_PARISC_TPREL16WF      222     /* 16 bits TP-rel. address.  */
#define R_PARISC_TPREL16DF      223     /* 16 bits TP-rel. address.  */
#define R_PARISC_LTOFF_TP64     224     /* 64 bits LT-TP-rel. address.  */
#define R_PARISC_LTOFF_TP14WR   227     /* LT-TP-rel. address, right 14 bits.*/
#define R_PARISC_LTOFF_TP14DR   228     /* LT-TP-rel. address, right 14 bits.*/
#define R_PARISC_LTOFF_TP16F    229     /* 16 bits LT-TP-rel. address.  */
#define R_PARISC_LTOFF_TP16WF   230     /* 16 bits LT-TP-rel. address.  */
#define R_PARISC_LTOFF_TP16DF   231     /* 16 bits LT-TP-rel. address.  */
#define R_PARISC_HIRESERVE      255

#define PA_PLABEL_FDESC         0x02    /* bit set if PLABEL points to
                                         * a function descriptor, not
                                         * an address */

/* The following are PA function descriptors 
 *
 * addr:        the absolute address of the function
 * gp:          either the data pointer (r27) for non-PIC code or
 *              the PLT pointer (r19) for PIC code */

/* Format for the Elf32 Function descriptor */
typedef struct elf32_fdesc {
        __u32   addr;
        __u32   gp;
} Elf32_Fdesc;

/* Format for the Elf64 Function descriptor */
typedef struct elf64_fdesc {
        __u64   dummy[2]; /* used by 64-bit eBPF and tracing functions */
        __u64   addr;
        __u64   gp;
} Elf64_Fdesc;

#ifdef CONFIG_64BIT
#define Elf_Fdesc       Elf64_Fdesc
#else
#define Elf_Fdesc       Elf32_Fdesc
#endif /*CONFIG_64BIT*/

/* Legal values for p_type field of Elf32_Phdr/Elf64_Phdr.  */

#define PT_HP_TLS               (PT_LOOS + 0x0)
#define PT_HP_CORE_NONE         (PT_LOOS + 0x1)
#define PT_HP_CORE_VERSION      (PT_LOOS + 0x2)
#define PT_HP_CORE_KERNEL       (PT_LOOS + 0x3)
#define PT_HP_CORE_COMM         (PT_LOOS + 0x4)
#define PT_HP_CORE_PROC         (PT_LOOS + 0x5)
#define PT_HP_CORE_LOADABLE     (PT_LOOS + 0x6)
#define PT_HP_CORE_STACK        (PT_LOOS + 0x7)
#define PT_HP_CORE_SHM          (PT_LOOS + 0x8)
#define PT_HP_CORE_MMF          (PT_LOOS + 0x9)
#define PT_HP_PARALLEL          (PT_LOOS + 0x10)
#define PT_HP_FASTBIND          (PT_LOOS + 0x11)
#define PT_HP_OPT_ANNOT         (PT_LOOS + 0x12)
#define PT_HP_HSL_ANNOT         (PT_LOOS + 0x13)
#define PT_HP_STACK             (PT_LOOS + 0x14)

#define PT_PARISC_ARCHEXT       0x70000000
#define PT_PARISC_UNWIND        0x70000001

/* Legal values for p_flags field of Elf32_Phdr/Elf64_Phdr.  */

#define PF_PARISC_SBP           0x08000000

#define PF_HP_PAGE_SIZE         0x00100000
#define PF_HP_FAR_SHARED        0x00200000
#define PF_HP_NEAR_SHARED       0x00400000
#define PF_HP_CODE              0x01000000
#define PF_HP_MODIFY            0x02000000
#define PF_HP_LAZYSWAP          0x04000000
#define PF_HP_SBP               0x08000000

/*
 * 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.
 */

#define ELF_PLATFORM  ("PARISC")

/*
 * The following definitions are those for 32-bit ELF binaries on a 32-bit
 * kernel and for 64-bit binaries on a 64-bit kernel.  To run 32-bit binaries
 * on a 64-bit kernel, fs/compat_binfmt_elf.c defines ELF_CLASS and then
 * #includes binfmt_elf.c, which then includes this file.
 */
#ifndef ELF_CLASS

#ifdef CONFIG_64BIT
#define ELF_CLASS       ELFCLASS64
#else
#define ELF_CLASS       ELFCLASS32
#endif

typedef unsigned long elf_greg_t;

#define SET_PERSONALITY(ex) \
({      \
        set_personality((current->personality & ~PER_MASK) | PER_LINUX); \
        clear_thread_flag(TIF_32BIT); \
        current->thread.map_base = DEFAULT_MAP_BASE; \
        current->thread.task_size = DEFAULT_TASK_SIZE; \
 })

#endif /* ! ELF_CLASS */

#define COMPAT_SET_PERSONALITY(ex) \
({      \
        if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \
                set_thread_flag(TIF_32BIT); \
                current->thread.map_base = DEFAULT_MAP_BASE32; \
                current->thread.task_size = DEFAULT_TASK_SIZE32; \
        } else clear_thread_flag(TIF_32BIT); \
 })

/*
 * Fill in general registers in a core dump.  This saves pretty
 * much the same registers as hp-ux, although in a different order.
 * Registers marked # below are not currently saved in pt_regs, so
 * we use their current values here.
 *
 *      gr0..gr31
 *      sr0..sr7
 *      iaoq0..iaoq1
 *      iasq0..iasq1
 *      cr11 (sar)
 *      cr19 (iir)
 *      cr20 (isr)
 *      cr21 (ior)
 *  #   cr22 (ipsw)
 *  #   cr0 (recovery counter)
 *  #   cr24..cr31 (temporary registers)
 *  #   cr8,9,12,13 (protection IDs)
 *  #   cr10 (scr/ccr)
 *  #   cr15 (ext int enable mask)
 *
 */

#define ELF_CORE_COPY_REGS(dst, pt)     \
        memset(dst, 0, sizeof(dst));    /* don't leak any "random" bits */ \
        {       int i; \
                for (i = 0; i < 32; i++) dst[i] = pt->gr[i]; \
                for (i = 0; i < 8; i++) dst[32 + i] = pt->sr[i]; \
        } \
        dst[40] = pt->iaoq[0]; dst[41] = pt->iaoq[1]; \
        dst[42] = pt->iasq[0]; dst[43] = pt->iasq[1]; \
        dst[44] = pt->sar;   dst[45] = pt->iir; \
        dst[46] = pt->isr;   dst[47] = pt->ior; \
        dst[48] = mfctl(22); dst[49] = mfctl(0); \
        dst[50] = mfctl(24); dst[51] = mfctl(25); \
        dst[52] = mfctl(26); dst[53] = mfctl(27); \
        dst[54] = mfctl(28); dst[55] = mfctl(29); \
        dst[56] = mfctl(30); dst[57] = mfctl(31); \
        dst[58] = mfctl( 8); dst[59] = mfctl( 9); \
        dst[60] = mfctl(12); dst[61] = mfctl(13); \
        dst[62] = mfctl(10); dst[63] = mfctl(15);

#define CORE_DUMP_USE_REGSET

#define ELF_NGREG 80    /* We only need 64 at present, but leave space
                           for expansion. */
typedef elf_greg_t elf_gregset_t[ELF_NGREG];

#define ELF_NFPREG 32
typedef double elf_fpreg_t;
typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];

struct task_struct;

struct pt_regs; /* forward declaration... */


#define elf_check_arch(x)               \
        ((x)->e_machine == EM_PARISC && (x)->e_ident[EI_CLASS] == ELF_CLASS)
#define compat_elf_check_arch(x)        \
        ((x)->e_machine == EM_PARISC && (x)->e_ident[EI_CLASS] == ELFCLASS32)

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_DATA        ELFDATA2MSB
#define ELF_ARCH        EM_PARISC
#define ELF_OSABI       ELFOSABI_LINUX

/* %r23 is set by ld.so to a pointer to a function which might be 
   registered using atexit.  This provides a means for the dynamic
   linker to call DT_FINI functions for shared libraries that have
   been loaded before the code runs.

   So that we can use the same startup file with static executables,
   we start programs with a value of 0 to indicate that there is no
   such function.  */
#define ELF_PLAT_INIT(_r, load_addr)       _r->gr[23] = 0

#define ELF_EXEC_PAGESIZE       4096

/* 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.

   (2 * TASK_SIZE / 3) turns into something undefined when run through a
   32 bit preprocessor and in some cases results in the kernel trying to map
   ld.so to the kernel virtual base. Use a sane value instead. /Jes 
  */

#define ELF_ET_DYN_BASE         (TASK_UNMAPPED_BASE + 0x01000000)

/* 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       0

#define STACK_RND_MASK  0x7ff   /* 8MB of VA */

#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
                                        int executable_stack);
#define VDSO_AUX_ENT(a, b) NEW_AUX_ENT(a, b)
#define VDSO_CURRENT_BASE current->mm->context.vdso_base

#define ARCH_DLINFO                                             \
do {                                                            \
        if (VDSO_CURRENT_BASE) {                                \
                NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE);\
        }                                                       \
} while (0)

#endif