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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.
- */
- #undef 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.
- */
- #define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD,SYMTAB) \
- switch(ELF32_R_TYPE((RELP)->r_info)){ \
- case R_ARM_ABS32: \
- *REL += SYMBOL; \
- break; \
- case R_ARM_PC24: \
- { long newvalue, topbits; \
- unsigned long addend = *REL & 0x00ffffff; \
- if (addend & 0x00800000) addend |= 0xff000000; \
- newvalue=SYMBOL-(unsigned long)REL+(addend<<2); \
- topbits = newvalue & 0xfe000000; \
- if (topbits!=0xfe000000&&topbits!=0x00000000){ \
- newvalue = fix_bad_pc24(REL, SYMBOL) \
- -(unsigned long)REL+(addend<<2); \
- topbits = newvalue & 0xfe000000; \
- if (topbits!=0xfe000000&&topbits!=0x00000000){ \
- SEND_STDERR("R_ARM_PC24 relocation out of range\n");\
- _dl_exit(1); } } \
- newvalue>>=2; \
- SYMBOL=(*REL&0xff000000)|(newvalue & 0x00ffffff); \
- *REL=SYMBOL; \
- } \
- break; \
- case R_ARM_GLOB_DAT: \
- case R_ARM_JUMP_SLOT: \
- *REL = SYMBOL; \
- break; \
- case R_ARM_RELATIVE: \
- *REL += (unsigned long) LOAD; \
- break; \
- case R_ARM_NONE: \
- break; \
- default: \
- SEND_STDERR("Aiieeee!"); \
- _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_ARM
- #undef MAGIC2
- /* Used for error messages */
- #define ELF_TARGET "ARM"
- struct elf_resolve;
- unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
- static inline unsigned long arm_modulus(unsigned long m, unsigned long p) {
- unsigned long i,t,inc;
- i=p; t=0;
- while(!(i&(1<<31))) {
- i<<=1;
- t++;
- }
- t--;
- for(inc=t;inc>2;inc--) {
- i=p<<inc;
- if(i&(1<<31))
- break;
- while(m>=i) {
- m-=i;
- i<<=1;
- if(i&(1<<31))
- break;
- if(i<p)
- break;
- }
- }
- while(m>=p) {
- m-=p;
- }
- return m;
- }
- #define do_rem(result, n, base) result=arm_modulus(n,base);
- /* 4096 bytes alignment */
- #define PAGE_ALIGN 0xfffff000
- #define ADDR_ALIGN 0xfff
- #define OFFS_ALIGN 0x7ffff000
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