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/* Any assmbly language/system dependent hacks needed to setup boot1.c so it
* will work as expected and cope with whatever platform specific wierdness is
* needed for this architecture. See arm/boot1_arch.h for an example of what
* can be done.
*/
asm(
" .text\n"
" .global _start\n"
" .type _start,%function\n"
"_start:\n"
" .set _start,_dl_start\n"
" .size _start,.-_start\n"
" .previous\n"
);
/*
* 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));
/*
* 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,SYMTAB) \
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")
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