diff options
Diffstat (limited to 'ldso/ldso/arm/dl-sysdep.h')
| -rw-r--r-- | ldso/ldso/arm/dl-sysdep.h | 128 |
1 files changed, 32 insertions, 96 deletions
diff --git a/ldso/ldso/arm/dl-sysdep.h b/ldso/ldso/arm/dl-sysdep.h index 96aa62678..ebd258a7f 100644 --- a/ldso/ldso/arm/dl-sysdep.h +++ b/ldso/ldso/arm/dl-sysdep.h @@ -1,123 +1,59 @@ +/* vi: set sw=4 ts=4: */ /* * Various assmbly language/system dependent hacks that are required * so that we can minimize the amount of platform specific code. + * Copyright (C) 2000-2004 by Erik Andersen <andersen@codpoet.org> */ -/* - * Define this if the system uses RELOCA. - */ +/* 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. - */ +/* Initialization sequence for the 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); \ +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++; } - - -/* - * 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; - - + 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); /* 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 |