diff options
Diffstat (limited to 'ldso/ldso/csky/dl-sysdep.h')
| -rw-r--r-- | ldso/ldso/csky/dl-sysdep.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/ldso/ldso/csky/dl-sysdep.h b/ldso/ldso/csky/dl-sysdep.h new file mode 100644 index 000000000..c78dd81bc --- /dev/null +++ b/ldso/ldso/csky/dl-sysdep.h @@ -0,0 +1,89 @@ +/* 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 +#undef MAGIC2 + +/* 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 */ +} + |