diff options
Diffstat (limited to 'ldso/ldso/cris/ld_sysdep.h')
-rw-r--r-- | ldso/ldso/cris/ld_sysdep.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/ldso/ldso/cris/ld_sysdep.h b/ldso/ldso/cris/ld_sysdep.h new file mode 100644 index 000000000..e915bf600 --- /dev/null +++ b/ldso/ldso/cris/ld_sysdep.h @@ -0,0 +1,111 @@ +/* CRIS can never use Elf32_Rel relocations. */ +#define ELF_USES_RELOCA + +/* + * 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. + */ +#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long *) ARGS) + +/* + * Initialization sequence for a GOT. + */ +#define INIT_GOT(GOT_BASE,MODULE) \ +{ \ + GOT_BASE[1] = (unsigned long) MODULE; \ + GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \ +} + +/* + * Here is a macro to perform a relocation. This is only used when + * bootstrapping the dynamic loader. RELP is the relocation that we + * are performing, REL is the pointer to the address we are relocating. + * SYMBOL is the symbol involved in the relocation, and LOAD is the + * load address. + */ +#define PERFORM_BOOTSTRAP_RELOC(RELP, REL, SYMBOL, LOAD) \ + switch (ELF32_R_TYPE((RELP)->r_info)) { \ + case R_CRIS_GLOB_DAT: \ + case R_CRIS_JUMP_SLOT: \ + case R_CRIS_32: \ + *REL = SYMBOL; \ + break; \ + case R_CRIS_16_PCREL: \ + *(short *) *REL = SYMBOL + (RELP)->r_addend - *REL - 2; \ + break; \ + case R_CRIS_32_PCREL: \ + *REL = SYMBOL + (RELP)->r_addend - *REL - 4; \ + break; \ + case R_CRIS_NONE: \ + break; \ + case R_CRIS_RELATIVE: \ + *REL = (unsigned long) LOAD + (RELP)->r_addend; \ + break; \ + default: \ + _dl_exit(1); \ + break; \ + } + +/* + * Transfer control to the user's application once the dynamic loader + * is done. This routine has to exit the current function, then call + * _dl_elf_main. + */ +#define START() __asm__ volatile ("moveq 0,$r8\n\t + move $r8,$srp\n\t + move.d %1,$sp\n\t + jump %0\n\t" : : "r" (_dl_elf_main), "r" (args)) + +/* Defined some magic numbers that this ld.so should accept. */ +#define MAGIC1 EM_CRIS +#undef MAGIC2 +#define ELF_TARGET "CRIS" + +struct elf_resolve; +extern unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry); + +/* Cheap modulo implementation, taken from arm/ld_sysdep.h. */ +static inline unsigned long +cris_mod(unsigned long m, unsigned long p) +{ + unsigned long i, t, inc; + + i = p; + t = 0; + + while (!(i & (1 << 31))) { + i <<= 1; + t++; + } + + t--; + + for (inc = t; inc > 2; inc--) { + i = p << inc; + + if (i & (1 << 31)) + break; + + while (m >= i) { + m -= i; + i <<= 1; + if (i & (1 << 31)) + break; + if (i < p) + break; + } + } + + while (m >= p) + m -= p; + + return m; +} + +#define do_rem(result, n, base) result = cris_mod(n, base); + +/* 8192 bytes alignment */ +#define PAGE_ALIGN 0xffffe000 +#define ADDR_ALIGN 0x1fff +#define OFFS_ALIGN 0xffffe000 |