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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 LINUXBIN
- /*
- * 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. We assume that argc is stored
- * at the word just below the argvp that we return here.
- */
- #define GET_ARGV(ARGVP, ARGS) __asm__("\tadd %%fp,68,%0\n" : "=r" (ARGVP));
- /*
- * Initialization sequence for a GOT. For the Sparc, this points to the
- * PLT, and we need to initialize a couple of the slots. The PLT should
- * look like:
- *
- * save %sp, -64, %sp
- * call _dl_linux_resolve
- * nop
- * .word implementation_dependent
- */
- #define INIT_GOT(GOT_BASE,MODULE) \
- { \
- GOT_BASE[0] = 0x9de3bfc0; /* save %sp, -64, %sp */ \
- GOT_BASE[1] = 0x40000000 | (((unsigned int) _dl_linux_resolve - (unsigned int) GOT_BASE - 4) >> 2); \
- GOT_BASE[2] = 0x01000000; /* nop */ \
- GOT_BASE[3] = (int) MODULE; \
- }
- /*
- * Here is a macro to perform a relocation. This is only used when
- * bootstrapping the dynamic loader.
- */
- #define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD) \
- switch(ELF32_R_TYPE((RELP)->r_info)) { \
- case R_SPARC_32: \
- *REL = SYMBOL + (RELP)->r_addend; \
- break; \
- case R_SPARC_GLOB_DAT: \
- *REL = SYMBOL + (RELP)->r_addend; \
- break; \
- case R_SPARC_JMP_SLOT: \
- REL[1] = 0x03000000 | ((SYMBOL >> 10) & 0x3fffff); \
- REL[2] = 0x81c06000 | (SYMBOL & 0x3ff); \
- break; \
- case R_SPARC_NONE: \
- break; \
- case R_SPARC_WDISP30: \
- break; \
- case R_SPARC_RELATIVE: \
- *REL += (unsigned int) LOAD + (RELP)->r_addend; \
- break; \
- default: \
- _dl_exit(1); \
- }
- /*
- * Transfer control to the user's application, once the dynamic loader
- * is done. The crt calls atexit with $g1 if not null, so we need to
- * ensure that it contains NULL.
- */
- #define START() \
- __asm__ volatile ( \
- "add %%g0,%%g0,%%g1\n\t" \
- "jmpl %0, %%o7\n\t" \
- "restore %%g0,%%g0,%%g0\n\t" \
- : /*"=r" (status) */ : \
- "r" (_dl_elf_main): "g1", "o0", "o1")
- /* Here we define the magic numbers that this dynamic loader should accept */
- #define MAGIC1 EM_SPARC
- #undef MAGIC2
- /* Used for error messages */
- #define ELF_TARGET "Sparc"
- #ifndef COMPILE_ASM
- extern unsigned int _dl_linux_resolver(unsigned int reloc_entry,
- unsigned int * i);
- #endif
- /*
- * Define this if you want a dynamic loader that works on Solaris.
- */
- #define SOLARIS_COMPATIBLE
- /*
- * Define this because we do not want to call .udiv in the library.
- * Change on the plans -miguel:
- * We just statically link against .udiv. This is required
- * if we want to be able to run on Sun4c machines.
- */
- /* We now link .urem against this one */
- #ifdef USE_V8
- #define do_rem(result,n,base) ({ \
- volatile int __res; \
- __asm__("mov %%g0,%%Y\n\t" \
- "sdiv %2,%3,%%l6\n\t" \
- "smul %%l6,%3,%%l6\n\t" \
- "sub %2,%%l6,%0\n\t" \
- :"=r" (result),"=r" (__res):"r" (n),"r"(base) : "l6" ); __res; })
- #else
- #define do_rem(a,b,c) a = _dl_urem (b,c);
- #endif
- /*
- * dbx wants the binder to have a specific name. Mustn't disappoint it.
- */
- #ifdef SOLARIS_COMPATIBLE
- #define _dl_linux_resolve _elf_rtbndr
- #endif
- /* 4096 bytes alignment */
- #define PAGE_ALIGN 0xfffff000
- #define ADDR_ALIGN 0xfff
- #define OFFS_ALIGN 0x7ffff000
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