diff options
Diffstat (limited to 'ldso/ldso/sparc/dl-startup.h')
| -rw-r--r-- | ldso/ldso/sparc/dl-startup.h | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/ldso/ldso/sparc/dl-startup.h b/ldso/ldso/sparc/dl-startup.h index 42c96a6f5..dd502f39c 100644 --- a/ldso/ldso/sparc/dl-startup.h +++ b/ldso/ldso/sparc/dl-startup.h @@ -4,4 +4,59 @@ * can be done. */ -#define DL_BOOT(X) void __attribute__ ((unused)) _dl_boot (X) +#define DL_BOOT(X) __attribute__ ((unused)) void _dl_boot (X) + + +/* + * 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") + + + + |