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/* Any assembly 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\
.align 32\n\
.register %g2, #scratch\n\
_start:\n\
/* Allocate space for functions to drop their arguments. */\n\
sub %sp, 6*4, %sp\n\
/* Pass pointer to argument block to _dl_start. */\n\
call _dl_start\n\
add %sp, 22*4, %o0\n\
/* FALTHRU */\n\
.globl _dl_start_user\n\
.type _dl_start_user, @function\n\
_dl_start_user:\n\
/* Load the PIC register. */\n\
1: call 2f\n\
sethi %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7\n\
2: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7\n\
add %l7, %o7, %l7\n\
/* Save the user entry point address in %l0 */\n\
mov %o0, %l0\n\
/* See if we were run as a command with the executable file name as an\n\
extra leading argument. If so, adjust the contents of the stack. */\n\
sethi %hi(_dl_skip_args), %g2\n\
or %g2, %lo(_dl_skip_args), %g2\n\
ld [%l7+%g2], %i0\n\
ld [%i0], %i0\n\
tst %i0\n\
/* Pass our finalizer function to the user in %g1. */\n\
sethi %hi(_dl_fini), %g1\n\
or %g1, %lo(_dl_fini), %g1\n\
ld [%l7+%g1], %g1\n\
/* Jump to the user's entry point and deallocate the extra stack we got. */\n\
jmp %l0\n\
add %sp, 6*4, %sp\n\
.size _dl_start_user, . - _dl_start_user\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) ARGVP = (((unsigned long *) ARGS) + 1)
/*
* 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(ELF_R_TYPE((RELP)->r_info)) { \
case R_SPARC_32: \
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: \
case R_SPARC_WDISP30: \
break; \
case R_SPARC_RELATIVE: \
*REL += (unsigned int) LOAD + (RELP)->r_addend; \
break; \
default: \
_dl_exit(1); \
}
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