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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\
- .hidden _start\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 of 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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