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[/] [or1k/] [trunk/] [linux/] [uClibc/] [ldso/] [ldso/] [sh64/] [ld_sysdep.h] - Rev 1765
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/* vi: set sw=8 ts=8: */ /* * 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) /* * Initialization sequence for a GOT. */ #define INIT_GOT(GOT_BASE,MODULE) \ { \ GOT_BASE[2] = (unsigned long)_dl_linux_resolve; \ GOT_BASE[1] = (unsigned long)(MODULE); \ } /* * 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. */ /* * We need to do this stupidity here as the preprocessor will choke when * SYMTAB is NULL if we do this in PERFORM_BOOTSTRAP_RELOC(). */ #include <elf.h> static inline int __extract_lsb_from_symtab(Elf32_Sym *symtab) { static int lsb = 0; /* Check for SHmedia/SHcompact */ if (symtab) lsb = symtab->st_other & 4; return lsb; } /* * While on the subject of stupidity, there appear to be some conflicts with * regards to several relocation types as far as binutils is concerned * (Barcelona and Madrid both appear to use an out of date elf.h, whereas * native Catalonia has all of the necessary definitions. As a workaround, * we'll just define them here for sanity.. */ #ifndef R_SH_RELATIVE_LOW16 # define R_SH_RELATIVE_LOW16 197 # define R_SH_RELATIVE_MEDLOW16 198 # define R_SH_IMM_LOW16 246 # define R_SH_IMM_LOW16_PCREL 247 # define R_SH_IMM_MEDLOW16 248 # define R_SH_IMM_MEDLOW16_PCREL 249 #endif #define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD,SYMTAB) \ const unsigned int r_type = ELF32_R_TYPE((RELP)->r_info); \ int lsb = __extract_lsb_from_symtab(SYMTAB); \ \ switch (r_type) { \ case R_SH_REL32: \ *(REL) = (SYMBOL) + (RELP)->r_addend \ - (unsigned long)(REL); \ break; \ case R_SH_DIR32: \ case R_SH_GLOB_DAT: \ case R_SH_JMP_SLOT: \ *(REL) = ((SYMBOL) + (RELP)->r_addend) | lsb; \ break; \ case R_SH_RELATIVE: \ *(REL) = (LOAD) + (RELP)->r_addend; \ break; \ case R_SH_RELATIVE_LOW16: \ case R_SH_RELATIVE_MEDLOW16: \ { \ unsigned long word, value; \ \ word = (unsigned long)(REL) & ~0x3fffc00; \ value = (LOAD) + (RELP)->r_addend; \ \ if (r_type == R_SH_RELATIVE_MEDLOW16) \ value >>= 16; \ \ word |= (value & 0xffff) << 10; \ *(REL) = word; \ break; \ } \ case R_SH_IMM_LOW16: \ case R_SH_IMM_MEDLOW16: \ { \ unsigned long word, value; \ \ word = (unsigned long)(REL) & ~0x3fffc00; \ value = ((SYMBOL) + (RELP)->r_addend) | lsb; \ \ if (r_type == R_SH_IMM_MEDLOW16) \ value >>= 16; \ \ word |= (value & 0xffff) << 10; \ *(REL) = word; \ break; \ } \ case R_SH_IMM_LOW16_PCREL: \ case R_SH_IMM_MEDLOW16_PCREL: \ { \ unsigned long word, value; \ \ word = (unsigned long)(REL) & ~0x3fffc00; \ value = (SYMBOL) + (RELP)->r_addend \ - (unsigned long)(REL); \ \ if (r_type == R_SH_IMM_MEDLOW16_PCREL) \ value >>= 16; \ \ word |= (value & 0xffff) << 10; \ *(REL) = word; \ break; \ } \ case R_SH_NONE: \ break; \ default: \ SEND_STDERR("BOOTSTRAP_RELOC: unhandled reloc type "); \ SEND_NUMBER_STDERR(ELF32_R_TYPE((RELP)->r_info), 1); \ SEND_STDERR("REL, SYMBOL, LOAD: "); \ SEND_ADDRESS_STDERR(REL, 0); \ SEND_STDERR(", "); \ SEND_ADDRESS_STDERR(SYMBOL, 0); \ SEND_STDERR(", "); \ SEND_ADDRESS_STDERR(LOAD, 1); \ _dl_exit(1); \ } /* * 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() return _dl_elf_main; /* Here we define the magic numbers that this dynamic loader should accept */ #define MAGIC1 EM_SH #undef MAGIC2 /* Used for error messages */ #define ELF_TARGET "sh64" struct elf_resolve; extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry); #define do_rem(result, n, base) result = (n % base) /* 4096 bytes alignment */ #define PAGE_ALIGN 0xfffff000 #define ADDR_ALIGN 0xfff #define OFFS_ALIGN 0x7ffff000