^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * ELF register definitions..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #ifndef _ASM_POWERPC_ELF_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #define _ASM_POWERPC_ELF_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/sched.h> /* for task_struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <uapi/asm/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * This is used to ensure we don't load something for the wrong architecture.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define elf_check_arch(x) ((x)->e_machine == ELF_ARCH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define compat_elf_check_arch(x) ((x)->e_machine == EM_PPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define CORE_DUMP_USE_REGSET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define ELF_EXEC_PAGESIZE PAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * This is the base location for PIE (ET_DYN with INTERP) loads. On
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * 64-bit, this is raised to 4GB to leave the entire 32-bit address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * space open for things that want to use the area for 32-bit pointers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define ELF_ET_DYN_BASE (is_32bit_task() ? 0x000400000UL : \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 0x100000000UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define ELF_CORE_EFLAGS (is_elf2_task() ? 2 : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Our registers are always unsigned longs, whether we're a 32 bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * process or 64 bit, on either a 64 bit or 32 bit kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * This macro relies on elf_regs[i] having the right type to truncate to,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * either u32 or u64. It defines the body of the elf_core_copy_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * function, either the native one with elf_gregset_t elf_regs or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * the 32-bit one with elf_gregset_t32 elf_regs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define PPC_ELF_CORE_COPY_REGS(elf_regs, regs) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int i, nregs = min(sizeof(*regs) / sizeof(unsigned long), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) (size_t)ELF_NGREG); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) for (i = 0; i < nregs; i++) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) elf_regs[i] = ((unsigned long *) regs)[i]; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) memset(&elf_regs[i], 0, (ELF_NGREG - i) * sizeof(elf_regs[0]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* Common routine for both 32-bit and 64-bit native processes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static inline void ppc_elf_core_copy_regs(elf_gregset_t elf_regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) PPC_ELF_CORE_COPY_REGS(elf_regs, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define ELF_CORE_COPY_REGS(gregs, regs) ppc_elf_core_copy_regs(gregs, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* ELF_HWCAP yields a mask that user programs can use to figure out what
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) instruction set this cpu supports. This could be done in userspace,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) but it's not easy, and we've already done it here. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) # define ELF_HWCAP (cur_cpu_spec->cpu_user_features)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) # define ELF_HWCAP2 (cur_cpu_spec->cpu_user_features2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* This yields a string that ld.so will use to load implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) specific libraries for optimization. This is more specific in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) intent than poking at uname or /proc/cpuinfo. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define ELF_PLATFORM (cur_cpu_spec->platform)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* While ELF_PLATFORM indicates the ISA supported by the platform, it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * may not accurately reflect the underlying behavior of the hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * (as in the case of running in Power5+ compatibility mode on a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * Power6 machine). ELF_BASE_PLATFORM allows ld.so to load libraries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * that are tuned for the real hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define ELF_BASE_PLATFORM (powerpc_base_platform)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #ifdef __powerpc64__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) # define ELF_PLAT_INIT(_r, load_addr) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) _r->gpr[2] = load_addr; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #endif /* __powerpc64__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #ifdef __powerpc64__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) # define SET_PERSONALITY(ex) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (((ex).e_flags & 0x3) == 2) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) set_thread_flag(TIF_ELF2ABI); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) else \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) clear_thread_flag(TIF_ELF2ABI); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) set_thread_flag(TIF_32BIT); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) else \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) clear_thread_flag(TIF_32BIT); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (personality(current->personality) != PER_LINUX32) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) set_personality(PER_LINUX | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) (current->personality & (~PER_MASK))); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * An executable for which elf_read_implies_exec() returns TRUE will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * have the READ_IMPLIES_EXEC personality flag set automatically. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * is only required to work around bugs in old 32bit toolchains. Since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * the 64bit ABI has never had these issues dont enable the workaround
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * even if we have an executable stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) # define elf_read_implies_exec(ex, exec_stk) (is_32bit_task() ? \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) (exec_stk == EXSTACK_DEFAULT) : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) # define elf_read_implies_exec(ex, exec_stk) (exec_stk == EXSTACK_DEFAULT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #endif /* __powerpc64__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) extern int dcache_bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) extern int icache_bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) extern int ucache_bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /* vDSO has arch_setup_additional_pages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct linux_binprm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) extern int arch_setup_additional_pages(struct linux_binprm *bprm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int uses_interp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define VDSO_AUX_ENT(a,b) NEW_AUX_ENT(a,b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* 1GB for 64bit, 8MB for 32bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define STACK_RND_MASK (is_32bit_task() ? \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) (0x7ff >> (PAGE_SHIFT - 12)) : \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) (0x3ffff >> (PAGE_SHIFT - 12)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #ifdef CONFIG_SPU_BASE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* Notes used in ET_CORE. Note name is "SPU/<fd>/<filename>". */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #define NT_SPU 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #define ARCH_HAVE_EXTRA_ELF_NOTES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #endif /* CONFIG_SPU_BASE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define get_cache_geometry(level) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) (ppc64_caches.level.assoc << 16 | ppc64_caches.level.line_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define ARCH_DLINFO_CACHE_GEOMETRY \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) NEW_AUX_ENT(AT_L1I_CACHESIZE, ppc64_caches.l1i.size); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) NEW_AUX_ENT(AT_L1I_CACHEGEOMETRY, get_cache_geometry(l1i)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) NEW_AUX_ENT(AT_L1D_CACHESIZE, ppc64_caches.l1d.size); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY, get_cache_geometry(l1d)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) NEW_AUX_ENT(AT_L2_CACHESIZE, ppc64_caches.l2.size); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) NEW_AUX_ENT(AT_L2_CACHEGEOMETRY, get_cache_geometry(l2)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) NEW_AUX_ENT(AT_L3_CACHESIZE, ppc64_caches.l3.size); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) NEW_AUX_ENT(AT_L3_CACHEGEOMETRY, get_cache_geometry(l3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define ARCH_DLINFO_CACHE_GEOMETRY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * The requirements here are:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * - keep the final alignment of sp (sp & 0xf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * - make sure the 32-bit value at the first 16 byte aligned position of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * AUXV is greater than 16 for glibc compatibility.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * AT_IGNOREPPC is used for that.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #define ARCH_DLINFO \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* Handle glibc compatibility. */ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /* Cache size items */ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) NEW_AUX_ENT(AT_DCACHEBSIZE, dcache_bsize); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) NEW_AUX_ENT(AT_ICACHEBSIZE, icache_bsize); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) NEW_AUX_ENT(AT_UCACHEBSIZE, ucache_bsize); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) VDSO_AUX_ENT(AT_SYSINFO_EHDR, current->mm->context.vdso_base); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) ARCH_DLINFO_CACHE_GEOMETRY; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) /* Relocate the kernel image to @final_address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) void relocate(unsigned long final_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) #endif /* _ASM_POWERPC_ELF_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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