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- /*
- * Various assmbly language/system dependent hacks that are required
- * so that we can minimize the amount of platform specific code.
- */
- /*
- * Define this if the system uses RELOCA.
- */
- #define ELF_USES_RELOCA
- /*
- * Get a pointer to the argv array. On many platforms this can be just
- * the address if the first argument, on other platforms we need to
- * do something a little more subtle here.
- */
- #define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long*) ARGS)+1)
- /*
- * Initialization sequence for a GOT.
- */
- #define INIT_GOT(GOT_BASE,MODULE) _dl_init_got(GOT_BASE,MODULE)
- /* Stuff for the PLT. */
- #define PLT_INITIAL_ENTRY_WORDS 18
- #define PLT_LONGBRANCH_ENTRY_WORDS 0
- #define PLT_TRAMPOLINE_ENTRY_WORDS 6
- #define PLT_DOUBLE_SIZE (1<<13)
- #define PLT_ENTRY_START_WORDS(entry_number) \
- (PLT_INITIAL_ENTRY_WORDS + (entry_number)*2 \
- + ((entry_number) > PLT_DOUBLE_SIZE \
- ? ((entry_number) - PLT_DOUBLE_SIZE)*2 \
- : 0))
- #define PLT_DATA_START_WORDS(num_entries) PLT_ENTRY_START_WORDS(num_entries)
- /* Macros to build PowerPC opcode words. */
- #define OPCODE_ADDI(rd,ra,simm) \
- (0x38000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff))
- #define OPCODE_ADDIS(rd,ra,simm) \
- (0x3c000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff))
- #define OPCODE_ADD(rd,ra,rb) \
- (0x7c000214 | (rd) << 21 | (ra) << 16 | (rb) << 11)
- #define OPCODE_B(target) (0x48000000 | ((target) & 0x03fffffc))
- #define OPCODE_BA(target) (0x48000002 | ((target) & 0x03fffffc))
- #define OPCODE_BCTR() 0x4e800420
- #define OPCODE_LWZ(rd,d,ra) \
- (0x80000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff))
- #define OPCODE_LWZU(rd,d,ra) \
- (0x84000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff))
- #define OPCODE_MTCTR(rd) (0x7C0903A6 | (rd) << 21)
- #define OPCODE_RLWINM(ra,rs,sh,mb,me) \
- (0x54000000 | (rs) << 21 | (ra) << 16 | (sh) << 11 | (mb) << 6 | (me) << 1)
- #define OPCODE_LI(rd,simm) OPCODE_ADDI(rd,0,simm)
- #define OPCODE_ADDIS_HI(rd,ra,value) \
- OPCODE_ADDIS(rd,ra,((value) + 0x8000) >> 16)
- #define OPCODE_LIS_HI(rd,value) OPCODE_ADDIS_HI(rd,0,value)
- #define OPCODE_SLWI(ra,rs,sh) OPCODE_RLWINM(ra,rs,sh,0,31-sh)
- #define PPC_DCBST(where) asm volatile ("dcbst 0,%0" : : "r"(where) : "memory")
- #define PPC_SYNC asm volatile ("sync" : : : "memory")
- #define PPC_ISYNC asm volatile ("sync; isync" : : : "memory")
- #define PPC_ICBI(where) asm volatile ("icbi 0,%0" : : "r"(where) : "memory")
- #define PPC_DIE asm volatile ("tweq 0,0")
- /*
- * Here is a macro to perform a relocation. This is only used when
- * bootstrapping the dynamic loader. RELP is the relocation that we
- * are performing, REL is the pointer to the address we are relocating.
- * SYMBOL is the symbol involved in the relocation, and LOAD is the
- * load address.
- */
- // finaladdr = LOAD ?
- #define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD) \
- {int type=ELF32_R_TYPE((RELP)->r_info); \
- if(type==R_PPC_NONE){ \
- }else if(type==R_PPC_ADDR32){ \
- *REL += (SYMBOL); \
- }else if(type==R_PPC_RELATIVE){ \
- *REL = (Elf32_Word)(LOAD) + (RELP)->r_addend; \
- }else if(type==R_PPC_REL24){ \
- Elf32_Sword delta = (Elf32_Word)(SYMBOL) - (Elf32_Word)(REL); \
- *REL &= 0xfc000003; \
- *REL |= (delta & 0x03fffffc); \
- }else if(type==R_PPC_JMP_SLOT){ \
- Elf32_Sword delta = (Elf32_Word)(SYMBOL) - (Elf32_Word)(REL); \
- /*if (delta << 6 >> 6 != delta)_dl_exit(99);*/ \
- *REL = OPCODE_B(delta); \
- }else{ \
- _dl_exit(100+ELF32_R_TYPE((RELP)->r_info)); \
- } \
- /*hexprint(*REL);*/ \
- PPC_DCBST(REL); PPC_SYNC; PPC_ICBI(REL); \
- }
- /*
- * Transfer control to the user's application, once the dynamic loader
- * is done. This routine has to exit the current function, then
- * call the _dl_elf_main function.
- */
- #define START() \
- __asm__ volatile ( \
- "addi 1,%1,0\n\t" \
- "mtlr %0\n\t" \
- "blrl\n\t" \
- : : "r" (_dl_elf_main), "r" (args))
- /* Here we define the magic numbers that this dynamic loader should accept */
- #define MAGIC1 EM_PPC
- #undef MAGIC2
- /* Used for error messages */
- #define ELF_TARGET "powerpc"
- struct elf_resolve;
- extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
- void _dl_init_got(unsigned long *lpnt,struct elf_resolve *tpnt);
- #define do_rem(result, n, base) result = (n % base)
- /* 4096 bytes alignment */
- #define PAGE_ALIGN 0xfffff000
- #define ADDR_ALIGN 0xfff
- #define OFFS_ALIGN 0x7ffff000
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