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-rw-r--r--sysdeps/sparc64/dl-machine.h304
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diff --git a/sysdeps/sparc64/dl-machine.h b/sysdeps/sparc64/dl-machine.h
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+++ b/sysdeps/sparc64/dl-machine.h
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+/* Machine-dependent ELF dynamic relocation inline functions. Sparc64 version.
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If
+ not, write to the Free Software Foundation, Inc.,
+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#define ELF_MACHINE_NAME "sparc64"
+
+#include <assert.h>
+#include <string.h>
+#include <link.h>
+#include <sys/param.h>
+#include <sysdep.h>
+
+
+/* Return nonzero iff E_MACHINE is compatible with the running host. */
+static inline int
+elf_machine_matches_host (Elf64_Half e_machine)
+{
+ return e_machine == EM_SPARC64;
+}
+
+
+/* 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 inline Elf64_Addr
+elf_machine_dynamic (void)
+{
+ register Elf64_Addr *got asm ("%l7");
+ return *got;
+}
+
+
+/* Return the run-time load address of the shared object. */
+static inline Elf64_Addr
+elf_machine_load_address (void)
+{
+ Elf64_Addr here;
+
+ __asm("rd %pc,%0\n\t"
+ "ba 1f\n\t"
+ " add %0,12,%0\n\t"
+ ".weak __load_address_undefined\n\t"
+ "call __load_address_undefined\n"
+ "1:"
+ : "=r"(here));
+
+ return here + (*(int *)here << 2);
+}
+
+#ifdef RESOLVE
+/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
+ MAP is the object containing the reloc. */
+
+static inline void
+elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
+ const Elf64_Sym *sym, const struct r_found_version *version)
+{
+ Elf64_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
+ Elf64_Addr loadbase;
+
+#ifndef RTLD_BOOTSTRAP
+ /* This is defined in rtld.c, but nowhere in the static libc.a; make the
+ reference weak so static programs can still link. This declaration
+ cannot be done when compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP)
+ because rtld.c contains the common defn for _dl_rtld_map, which is
+ incompatible with a weak decl in the same file. */
+ weak_extern (_dl_rtld_map);
+#endif
+
+ if (ELF64_R_TYPE (reloc->r_info) == R_SPARC_RELATIVE)
+ {
+#ifndef RTLD_BOOTSTRAP
+ if (map != &_dl_rtld_map) /* Already done in rtld itself. */
+#endif
+ *reloc_addr += map->l_addr + reloc->r_addend;
+ }
+ else
+ {
+ const Elf64_Sym *const refsym = sym;
+ Elf64_Addr value;
+ if (sym->st_shndx != SHN_UNDEF &&
+ ELF64_ST_BIND (sym->st_info) == STB_LOCAL)
+ value = map->l_addr;
+ else
+ {
+ value = RESOLVE (&sym, version, ELF64_R_TYPE (reloc->r_info));
+ if (sym)
+ value += sym->st_value;
+ }
+ value += reloc->r_addend; /* Assume copy relocs have zero addend. */
+
+ switch (ELF64_R_TYPE (reloc->r_info))
+ {
+ case R_SPARC_COPY:
+ if (sym->st_size > refsym->st_size
+ || (_dl_verbose && sym->st_size < refsym->st_size))
+ {
+ const char *strtab;
+
+ strtab = ((void *) map->l_addr
+ + map->l_info[DT_STRTAB]->d_un.d_ptr);
+ _dl_sysdep_error ("Symbol `", strtab + refsym->st_name,
+ "' has different size in shared object, "
+ "consider re-linking\n", NULL);
+ }
+ memcpy (reloc_addr, (void *) value, MIN (sym->st_size,
+ refsym->st_size));
+ break;
+ case R_SPARC_GLOB_DAT:
+ /* case R_SPARC_64: */
+ case R_SPARC_JMP_SLOT:
+ *reloc_addr = value;
+ break;
+ case R_SPARC_8:
+ *(char *) reloc_addr = value;
+ break;
+ case R_SPARC_16:
+ *(short *) reloc_addr = value;
+ break;
+ case R_SPARC_DISP8:
+ *(char *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
+ break;
+ case R_SPARC_DISP16:
+ *(short *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
+ break;
+ case R_SPARC_DISP32:
+ *(unsigned int *)reloc_addr = (value - (Elf64_Addr) reloc_addr);
+ break;
+ case R_SPARC_LO10:
+ *(unsigned *)reloc_addr = (*(unsigned *)reloc_addr & ~0x3ff)
+ | (value & 0x3ff);
+ break;
+ case R_SPARC_WDISP30:
+ *(unsigned *)reloc_addr = ((*(unsigned *)reloc_addr & 0xc0000000)
+ | ((value - (Elf64_Addr) reloc_addr) >> 2));
+ break;
+ case R_SPARC_HI22:
+ *(unsigned *)reloc_addr = (*(unsigned *)reloc_addr & 0xffc00000)
+ | (value >> 10);
+ break;
+ case R_SPARC_NONE: /* Alright, Wilbur. */
+ break;
+ default:
+ assert (! "unexpected dynamic reloc type");
+ break;
+ }
+ }
+}
+
+static inline void
+elf_machine_lazy_rel (struct link_map *map, const Elf64_Rela *reloc)
+{
+ switch (ELF64_R_TYPE (reloc->r_info))
+ {
+ case R_SPARC_NONE:
+ break;
+ case R_SPARC_JMP_SLOT:
+ break;
+ default:
+ assert (! "unexpected PLT reloc type");
+ break;
+ }
+}
+
+#endif /* RESOLVE */
+
+/* Nonzero iff TYPE should not be allowed to resolve to one of
+ the main executable's symbols, as for a COPY reloc. */
+#define elf_machine_lookup_noexec_p(type) ((type) == R_SPARC_COPY)
+
+/* Nonzero iff TYPE describes relocation of a PLT entry, so
+ PLT entries should not be allowed to define the value. */
+#define elf_machine_lookup_noplt_p(type) ((type) == R_SPARC_JMP_SLOT)
+
+/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
+#define ELF_MACHINE_RELOC_NOPLT R_SPARC_JMP_SLOT
+
+/* The SPARC never uses Elf64_Rel relocations. */
+#define ELF_MACHINE_NO_REL 1
+
+
+/* Set up the loaded object described by L so its unrelocated PLT
+ entries will jump to the on-demand fixup code in dl-runtime.c. */
+
+static inline int
+elf_machine_runtime_setup (struct link_map *l, int lazy)
+{
+ Elf64_Addr *got;
+ extern void _dl_runtime_resolve (Elf64_Word);
+
+ if (l->l_info[DT_JMPREL] && lazy)
+ {
+ got = (Elf64_Addr *) (l->l_addr + l->l_info[DT_PLTGOT]->d_un.d_ptr);
+ got[1] = (Elf64_Addr) l; /* Identify this shared object. */
+ /* This function will get called to fix up the GOT entry indicated by
+ the offset on the stack, and then jump to the resolved address. */
+ got[2] = (Elf64_Addr) &_dl_runtime_resolve;
+ }
+
+ return lazy;
+}
+
+/* This code is used in dl-runtime.c to call the `fixup' function
+ and then redirect to the address it returns. */
+#define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
+ .globl _dl_runtime_resolve
+ .type _dl_runtime_resolve, @function
+_dl_runtime_resolve:
+ save %sp, -160, %sp
+ mov %g1, %o1
+ call fixup
+ mov %g2, %o0
+ jmp %o0
+ restore
+ .size _dl_runtime_resolve, .-_dl_runtime_resolve
+");
+
+/* The PLT uses Elf64_Rela relocs. */
+#define elf_machine_relplt elf_machine_rela
+
+
+/* Mask identifying addresses reserved for the user program,
+ where the dynamic linker should not map anything. */
+#define ELF_MACHINE_USER_ADDRESS_MASK ???
+
+/* Initial entry point code for the dynamic linker.
+ The C function `_dl_start' is the real entry point;
+ its return value is the user program's entry point. */
+
+#define __S1(x) #x
+#define __S(x) __S1(x)
+
+#define RTLD_START __asm__ ( "\
+ .global _start
+ .type _start, @function
+_start:
+ /* Make room for functions to drop their arguments on the stack. */
+ sub %sp, 6*8, %sp
+ /* Pass pointer to argument block to _dl_start. */
+ call _dl_start
+ add %sp," __S(STACK_BIAS) "+22*8,%o0
+ /* FALLTHRU */
+
+ .global _dl_start_user
+ .type _dl_start_user, @function
+_dl_start_user:
+ /* Load the GOT register. */
+1: rd %pc,%g1
+ sethi %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)),%l7
+ or %l2,%lo(_GLOBAL_OFFSET_TABLE_-(1b-.)),%l7
+ add %l7,%g1,%l7
+ /* Save the user entry point address in %l0. */
+ mov %o0,%l0
+ /* See if we were run as a command with the executable file name as an
+ extra leading argument. If so, adjust the stack pointer. */
+ sethi %hi(_dl_skip_args), %g2
+ or %g2, %lo(_dl_skip_args), %g2
+ ld [%l7+%g2], %i0
+ brz,pt %i0, 2f
+ ldx [%sp+" __S(STACK_BIAS) "+22*8], %i1
+ sub %i1, %i0, %i1
+ sllx %i0, 3, %i2
+ add %sp, %i2, %sp
+ stx %i1, [%sp+" __S(STACK_BIAS) "+22*8]
+ /* Load _dl_default_scope[2] to pass to _dl_init_next. */
+2: sethi %hi(_dl_default_scope), %g2
+ or %g2, %lo(_dl_defalt_scope), %g2
+ add %g2, 2*8, %g2
+ ldx [%l7+%g2], %l1
+ /* Call _dl_init_next to return the address of an initializer to run. */
+3: call _dl_init_next
+ mov %l1, %o0
+ brz,pn %o0, 4f
+ nop
+ jmpl %o0, %o7
+ nop
+ ba,a 3b
+ /* Clear the startup flag. */
+4: sethi %hi(_dl_starting_up), %g2
+ or %g2, %lo(_dl_starting_up), %g2
+ st %g0, [%l7+%g2]
+ /* Pass our finalizer function to the user in %g1
+ sethi %hi(_dl_fini), %g1
+ or %g1, %lo(_dl_fini), %g1
+ ldx [%l7+%g1], %g1
+ /* Jump to the user's entry point & undo the allocation of the xtra regs. */
+ jmp %l0
+ add %sp, 6*8, %sp
+ .size _dl_start_user, .-_dl_start_user");
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