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- /*
- * Copyright (C) 2017 Hangzhou C-SKY Microsystems co.,ltd.
- *
- * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB
- * in this tarball.
- */
- /* Define this if the system uses RELOCA. */
- #define ELF_USES_RELOCA
- #include <elf.h>
- /* Initialization sequence for the GOT. */
- #define INIT_GOT(GOT_BASE,MODULE) \
- do { \
- GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \
- GOT_BASE[1] = (unsigned long) MODULE; \
- } while(0)
- /* Here we define the magic numbers that this dynamic loader should accept */
- #define MAGIC1 EM_MCORE
- #define MAGIC2 EM_CSKY
- /* Used for error messages */
- #define ELF_TARGET "csky"
- struct elf_resolve;
- extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
- /* 65536 bytes alignment */
- #define PAGE_ALIGN 0xfffff000 /* need modify */
- #define ADDR_ALIGN 0xfff
- #define OFFS_ALIGN 0x7ffff000
- /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or
- TLS variable, so undefined references should not be allowed to
- define the value.
- ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
- of the main executable's symbols, as for a COPY reloc. */
- #define elf_machine_type_class(type) \
- ((((type) == R_CKCORE_JUMP_SLOT || (type) == R_CKCORE_TLS_DTPMOD32 \
- || (type) == R_CKCORE_TLS_DTPOFF32 || (type) == R_CKCORE_TLS_TPOFF32) \
- * ELF_RTYPE_CLASS_PLT) \
- | (((type) == R_CKCORE_COPY) * ELF_RTYPE_CLASS_COPY))
- /* Return the link-time address of _DYNAMIC. Conveniently, this is the
- first element of the GOT. This must be inlined in a function which
- uses global data. */
- static __inline__ Elf32_Addr elf_machine_dynamic (void) attribute_unused;
- static __inline__ Elf32_Addr
- elf_machine_dynamic (void)
- {
- register Elf32_Addr *got __asm__ ("gb"); /* need modify */
- return *got;
- }
- /* this funtion will be called only when the auxvt[AT_BASE].a_un.a_val == 0
- so it normal not be called, we should define a default address of the interprrter load */
- static __inline__ Elf32_Addr elf_machine_load_address (void) attribute_unused;
- static __inline__ Elf32_Addr
- elf_machine_load_address (void)
- {
- #ifdef __CSKYABIV2__
- extern Elf32_Addr internal_function __dl_start (void *) __asm__ ("_dl_start");
- Elf32_Addr got_addr = (Elf32_Addr) &__dl_start;
- Elf32_Addr pcrel_addr;
- __asm__ ("grs %0,_dl_start\n" : "=r" (pcrel_addr));
- #else
- extern Elf32_Addr internal_function __start_flag (void *) __asm__ ("start_flag");
- Elf32_Addr got_addr = (Elf32_Addr) &__start_flag;
- Elf32_Addr pcrel_addr;
- __asm__ ("subi sp,8\n" \
- "stw lr,(sp,0)\n" \
- "bsr start_flag\n" \
- "start_flag:" \
- "mov %0, lr\n" \
- "ldw lr,(sp,0)\n" \
- "addi sp,8\n" \
- : "=r" (pcrel_addr));
- #endif
- return pcrel_addr - got_addr;
- }
- /* some relocation information are machine special */
- static __inline__ void
- elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr,
- Elf32_Word relative_count)
- {
- Elf32_Rela *rpnt = (void *) rel_addr;
- --rpnt;
- do {
- Elf32_Addr *reloc_addr = (void *) (load_off + (++rpnt)->r_offset);
- *reloc_addr = load_off + rpnt->r_addend;
- } while (--relative_count); /* maybe need modify */
- }
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