diff options
Diffstat (limited to 'ldso/ldso/sh64/dl-sysdep.h')
| -rw-r--r-- | ldso/ldso/sh64/dl-sysdep.h | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/ldso/ldso/sh64/dl-sysdep.h b/ldso/ldso/sh64/dl-sysdep.h deleted file mode 100644 index 043413931..000000000 --- a/ldso/ldso/sh64/dl-sysdep.h +++ /dev/null @@ -1,168 +0,0 @@ -/* vi: set sw=8 ts=8: */ -/* - * Various assembly language/system dependent hacks that are required - * so that we can minimize the amount of platform specific code. - */ - -/* Define this if the system uses RELOCA. */ -#define ELF_USES_RELOCA -#include <elf.h> -/* - * Initialization sequence for a GOT. - */ -#define INIT_GOT(GOT_BASE,MODULE) \ -{ \ - GOT_BASE[2] = (unsigned long)_dl_linux_resolve; \ - GOT_BASE[1] = (unsigned long)(MODULE); \ -} - -/* Here we define the magic numbers that this dynamic loader should accept */ -#define MAGIC1 EM_SH -#undef MAGIC2 - -/* Used for error messages */ -#define ELF_TARGET "sh64" - -/* Need bootstrap relocations */ -#define ARCH_NEEDS_BOOTSTRAP_RELOCS - -struct elf_resolve; -extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry); - -/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or - TLS variable, so undefined references should not be allowed to - define the value. - ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one - of the main executable's symbols, as for a COPY reloc. */ -#define elf_machine_type_class(type) \ - ((((type) == R_SH_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \ - | (((type) == R_SH_COPY) * ELF_RTYPE_CLASS_COPY)) - -/* Return the link-time address of _DYNAMIC. Conveniently, this is the - first element of the GOT. This must be inlined in a function which - uses global data. */ -static __always_inline Elf32_Addr elf_machine_dynamic(void) -{ - register Elf32_Addr *got; - - /* - * The toolchain adds 32768 to the GOT address, we compensate for - * that in the movi/sub pair. - * - * XXX: If this is cleaned up in the toolchain, we can end up - * saving 2 instructions and subsequently free up r1 from the - * clobber list.. - */ - __asm__ ( - "movi\t(((datalabel _GLOBAL_OFFSET_TABLE_-(.LZZZ1-.)) >> 16) & 0xffff), r2\n\t" - "shori\t((datalabel _GLOBAL_OFFSET_TABLE_-(.LZZZ1-.)) & 0xffff), r2\n\t" - ".LZZZ1:\tptrel/u r2, tr0\n\t" - "movi\t32768, r1\n\t" - "gettr\ttr0, r2\n\t" - "sub\tr2, r1, %0\n\t" - : "=r" (got) - : /* no inputs */ - : "r1", "r2", "tr0" - ); - - return *got; -} - -/* Return the run-time load address of the shared object. */ -static __always_inline Elf32_Addr elf_machine_load_address(void) -{ - Elf32_Addr addr; - - __asm__ ( - "movi\t(((datalabel _GLOBAL_OFFSET_TABLE_-(.LZZZ2-.)) >> 16) & 0xffff), r0\n\t" - "shori\t((datalabel _GLOBAL_OFFSET_TABLE_-(.LZZZ2-.)) & 0xffff), r0\n\t" - ".LZZZ2:\tptrel/u r0, tr0\n\t" - "movi\t(((_dl_start@GOTOFF) >> 16) & 0xffff), r2\n\t" - "shori\t((_dl_start@GOTOFF) & 0xffff), r2\n\t" - "gettr\ttr0, r0\n\t" - "add\tr2, r0, r2\n\t" - "movi\t(((_dl_start@GOT) >> 16) & 0xffff), r1\n\t" - "shori\t((_dl_start@GOT) & 0xffff), r1\n\t" - "ldx.l\tr1, r0, r1\n\t" - "sub\tr2, r1, %0\n\t" - : "=r" (addr) - : /* no inputs */ - : "r0", "r1", "r2", "tr0" - ); - - return addr; -} - -/* - * XXX: As we don't need to worry about r25 clobbering, we could probably - * get away with inlining {st,ld}{x,}.l and friends here instead and - * forego gcc's idea of code generation. - */ -#define COPY_UNALIGNED_WORD(swp, twp, align) \ -{ \ - void *__s = (swp), *__t = (twp); \ - unsigned char *__s1 = __s, *__t1 = __t; \ - unsigned short *__s2 = __s, *__t2 = __t; \ - unsigned long *__s4 = __s, *__t4 = __t; \ - \ - switch ((align)) { \ - case 0: \ - *__t4 = *__s4; \ - break; \ - case 2: \ - *__t2++ = *__s2++; \ - *__t2 = *__s2; \ - break; \ - default: \ - *__t1++ = *__s1++; \ - *__t1++ = *__s1++; \ - *__t1++ = *__s1++; \ - *__t1 = *__s1; \ - break; \ - } \ -} - -static __always_inline void -elf_machine_relative(Elf32_Addr load_off, const Elf32_Addr rel_addr, - Elf32_Word relative_count) -{ - Elf32_Addr value, word; - Elf32_Rela *rpnt = (void *)rel_addr; - int reloc_type = ELF_R_TYPE(rpnt->r_info); - - do { - Elf32_Addr *const reloc_addr = - (void *)(load_off + rpnt->r_offset); - int align = (int)reloc_addr & 3; - - switch (reloc_type) { - case R_SH_RELATIVE_LOW16: - COPY_UNALIGNED_WORD(reloc_addr, &word, align); - word &= ~0x3fffc00; - value = (rpnt->r_addend + load_off); - word |= (value & 0xffff) << 10; - COPY_UNALIGNED_WORD(&word, reloc_addr, align); - break; - case R_SH_RELATIVE_MEDLOW16: - COPY_UNALIGNED_WORD(reloc_addr, &word, align); - word &= ~0x3fffc00; - value = (rpnt->r_addend + load_off) >> 16; - word |= (value & 0xffff) << 10; - COPY_UNALIGNED_WORD(&word, reloc_addr, align); - break; - default: - if (rpnt->r_addend) { - value = load_off + rpnt->r_addend; - } else { - COPY_UNALIGNED_WORD(reloc_addr, &value, align); - value += load_off; - } - - COPY_UNALIGNED_WORD(&value, reloc_addr, align); - break; - } - - rpnt++; - } while (--relative_count); -#undef COPY_UNALIGNED_WORD -} |