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1325 |
phoenix |
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/*
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* Various assmbly language/system dependent hacks that are required
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* so that we can minimize the amount of platform specific code.
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*/
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#define LINUXBIN
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/*
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* Define this if the system uses RELOCA.
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*/
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#define ELF_USES_RELOCA
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/*
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* Get a pointer to the argv array. On many platforms this can be just
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* the address if the first argument, on other platforms we need to
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* do something a little more subtle here. We assume that argc is stored
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* at the word just below the argvp that we return here.
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*/
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#define GET_ARGV(ARGVP, ARGS) __asm__("\tadd %%fp,68,%0\n" : "=r" (ARGVP));
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/*
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* Initialization sequence for a GOT. For the Sparc, this points to the
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* PLT, and we need to initialize a couple of the slots. The PLT should
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* look like:
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*
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* save %sp, -64, %sp
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* call _dl_linux_resolve
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* nop
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* .word implementation_dependent
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*/
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#define INIT_GOT(GOT_BASE,MODULE) \
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{ \
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GOT_BASE[0] = 0x9de3bfc0; /* save %sp, -64, %sp */ \
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GOT_BASE[1] = 0x40000000 | (((unsigned int) _dl_linux_resolve - (unsigned int) GOT_BASE - 4) >> 2); \
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GOT_BASE[2] = 0x01000000; /* nop */ \
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GOT_BASE[3] = (int) MODULE; \
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}
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/*
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* Here is a macro to perform a relocation. This is only used when
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* bootstrapping the dynamic loader.
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*/
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#define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD,SYMTAB) \
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switch(ELF32_R_TYPE((RELP)->r_info)) { \
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case R_SPARC_32: \
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*REL = SYMBOL + (RELP)->r_addend; \
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break; \
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case R_SPARC_GLOB_DAT: \
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*REL = SYMBOL + (RELP)->r_addend; \
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break; \
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case R_SPARC_JMP_SLOT: \
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REL[1] = 0x03000000 | ((SYMBOL >> 10) & 0x3fffff); \
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REL[2] = 0x81c06000 | (SYMBOL & 0x3ff); \
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break; \
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case R_SPARC_NONE: \
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break; \
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case R_SPARC_WDISP30: \
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break; \
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case R_SPARC_RELATIVE: \
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*REL += (unsigned int) LOAD + (RELP)->r_addend; \
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break; \
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default: \
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_dl_exit(1); \
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}
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/*
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* Transfer control to the user's application, once the dynamic loader
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* is done. The crt calls atexit with $g1 if not null, so we need to
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* ensure that it contains NULL.
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*/
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#define START() \
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__asm__ volatile ( \
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"add %%g0,%%g0,%%g1\n\t" \
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"jmpl %0, %%o7\n\t" \
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"restore %%g0,%%g0,%%g0\n\t" \
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: /*"=r" (status) */ : \
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"r" (_dl_elf_main): "g1", "o0", "o1")
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/* Here we define the magic numbers that this dynamic loader should accept */
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#define MAGIC1 EM_SPARC
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#undef MAGIC2
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/* Used for error messages */
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#define ELF_TARGET "Sparc"
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#ifndef COMPILE_ASM
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extern unsigned int _dl_linux_resolver(unsigned int reloc_entry,
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unsigned int * i);
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#endif
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/*
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* Define this if you want a dynamic loader that works on Solaris.
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*/
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#define SOLARIS_COMPATIBLE
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#define do_rem(result, n, base) result = (n % base)
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/*
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* dbx wants the binder to have a specific name. Mustn't disappoint it.
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*/
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#ifdef SOLARIS_COMPATIBLE
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#define _dl_linux_resolve _elf_rtbndr
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#endif
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/* 4096 bytes alignment */
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#define PAGE_ALIGN 0xfffff000
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#define ADDR_ALIGN 0xfff
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#define OFFS_ALIGN 0x7ffff000
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