/* Machine-dependent ELF dynamic relocation inline functions. SH version.
- Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1999-2024 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.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser 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. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
#ifndef dl_machine_h
#define dl_machine_h
-/* Only dummy. This doesn't work. */
-
#define ELF_MACHINE_NAME "SH"
#include <sys/param.h>
-
+#include <sysdep.h>
#include <assert.h>
+#include <dl-static-tls.h>
+#include <dl-machine-rel.h>
/* Return nonzero iff ELF header is compatible with the running host. */
static inline int __attribute__ ((unused))
elf_machine_load_address (void)
{
Elf32_Addr addr;
- asm ("mov.l .L1,r0
- mov.l .L3,r2
- add r12,r2
- mov.l @(r0,r12),r0
- bra .L2
- sub r0,r2
- .align 2
- .L1: .long _dl_start@GOT
- .L3: .long _dl_start@GOTOFF
- .L2: mov r2,%0"
+ asm ("mov.l 1f,r0\n\
+ mov.l 3f,r2\n\
+ add r12,r2\n\
+ mov.l @(r0,r12),r0\n\
+ bra 2f\n\
+ sub r0,r2\n\
+ .align 2\n\
+ 1: .long _dl_start@GOT\n\
+ 3: .long _dl_start@GOTOFF\n\
+ 2: mov r2,%0"
: "=r" (addr) : : "r0", "r1", "r2");
return addr;
}
/* 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 __attribute__ ((unused))
-elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
+static inline int __attribute__ ((unused, always_inline))
+elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
+ int lazy, int profile)
{
Elf32_Addr *got;
extern void _dl_runtime_resolve (Elf32_Word);
offset into the .rela.plt section and _GLOBAL_OFFSET_TABLE_[1],
and then jump to _GLOBAL_OFFSET_TABLE[2]. */
got = (Elf32_Addr *) D_PTR (l, l_info[DT_PLTGOT]);
+ /* If a library is prelinked but we have to relocate anyway,
+ we have to be able to undo the prelinking of .got.plt.
+ The prelinker saved us here address of .plt + 36. */
+ if (got[1])
+ {
+ l->l_mach.plt = got[1] + l->l_addr;
+ l->l_mach.gotplt = (Elf32_Addr) &got[3];
+ }
got[1] = (Elf32_Addr) l; /* Identify this shared object. */
/* The got[2] entry contains the address of a function which gets
to intercept the calls to collect information. In this case we
don't store the address in the GOT so that all future calls also
end in this function. */
+#ifdef SHARED
if (profile)
{
got[2] = (Elf32_Addr) &_dl_runtime_profile;
/* Say that we really want profiling and the timers are started. */
- _dl_profile_map = l;
+ if (GLRO(dl_profile) != NULL
+ && _dl_name_match_p (GLRO(dl_profile), l))
+ GL(dl_profile_map) = l;
}
else
+#endif
/* 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] = (Elf32_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_FIXUP_ARGS int plt_type
-
-#ifdef SHARED
-#define FUN_ADDR "\
- mov.l 1f,r2
- mova 1f,r0
- bra 2f
- add r0,r2 ! Get GOT address in r2
-0: .align 2
-1: .long _GLOBAL_OFFSET_TABLE_
-2: mov.l 3f,r0
- add r2,r0"
-#define GOTJMP(x) #x "@GOTOFF"
-#else
-#define FUN_ADDR "\
- mov.l 3f,r0"
-#define GOTJMP(x) #x
-#endif
-
-#ifdef HAVE_FPU
-#define FGR_SAVE "\
- sts.l fpscr, @-r15
- mov #8,r3
- swap.w r3, r3
- lds r3, fpscr
- fmov.s fr11, @-r15
- fmov.s fr10, @-r15
- fmov.s fr9, @-r15
- fmov.s fr8, @-r15
- fmov.s fr7, @-r15
- fmov.s fr6, @-r15
- fmov.s fr5, @-r15
- fmov.s fr4, @-r15"
-#define FGR_LOAD "\
- fmov.s @r15+, fr4
- fmov.s @r15+, fr5
- fmov.s @r15+, fr6
- fmov.s @r15+, fr7
- fmov.s @r15+, fr8
- fmov.s @r15+, fr9
- fmov.s @r15+, fr10
- fmov.s @r15+, fr11
- lds.l @r15+, fpscr"
-#else
-#define FGR_SAVE ""
-#define FGR_LOAD ""
-#endif
-
-#ifndef PROF
-# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
- .text
- .globl _dl_runtime_resolve
- .type _dl_runtime_resolve, @function
- .align 5
-_dl_runtime_resolve:
- mov.l r3,@-r15
- mov.l r4,@-r15
- mov.l r5,@-r15
- mov.l r6,@-r15
- mov.l r7,@-r15
- mov.l r12,@-r15
- movt r3 ! Save T flag.
- mov.l r3,@-r15
- " FGR_SAVE "
- sts.l pr,@-r15
- mov r0,r4 ! PLT type
- mov r2,r5 ! link map address
- " FUN_ADDR "
- jsr @r0 ! Call resolver.
- mov r1,r6 ! reloc offset
- lds.l @r15+,pr ! Get register content back.
- " FGR_LOAD "
- mov.l @r15+,r3
- shal r3 ! Lode T flag.
- mov.l @r15+,r12
- mov.l @r15+,r7
- mov.l @r15+,r6
- mov.l @r15+,r5
- mov.l @r15+,r4
- jmp @r0 ! Jump to function address.
- mov.l @r15+,r3
- .align 2
-3:
- .long " GOTJMP (fixup) "
- .size _dl_runtime_resolve, .-_dl_runtime_resolve
-
- .globl _dl_runtime_profile
- .type _dl_runtime_profile, @function
- .align 5
-_dl_runtime_profile:
- mov.l r3,@-r15
- mov.l r4,@-r15
- mov.l r5,@-r15
- mov.l r6,@-r15
- mov.l r7,@-r15
- mov.l r12,@-r15
- movt r3 ! Save T flag.
- mov.l r3,@-r15
- " FGR_SAVE "
- sts.l pr,@-r15
- mov r0,r4 ! PLT type
- mov r2,r5 ! link map address
- sts pr,r7 ! return address
- " FUN_ADDR "
- jsr @r0 ! Call resolver.
- mov r1,r6 ! reloc offset
- lds.l @r15+,pr ! Get register content back.
- " FGR_LOAD "
- mov.l @r15+,r3
- shal r3 ! Lode T flag.
- mov.l @r15+,r12
- mov.l @r15+,r7
- mov.l @r15+,r6
- mov.l @r15+,r5
- mov.l @r15+,r4
- jmp @r0 ! Jump to function address.
- mov.l @r15+,r3
- .align 2
-3:
- .long " GOTJMP (profile_fixup) "
- .size _dl_runtime_profile, .-_dl_runtime_profile
- .previous
-");
-#else
-# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
- .text
- .globl _dl_runtime_resolve
- .globl _dl_runtime_profile
- .type _dl_runtime_resolve, @function
- .type _dl_runtime_profile, @function
- .align 5
-_dl_runtime_resolve:
-_dl_runtime_profile:
- mov.l r3,@-r15
- mov.l r4,@-r15
- mov.l r5,@-r15
- mov.l r6,@-r15
- mov.l r7,@-r15
- mov.l r12,@-r15
- movt r3 ! Save T flag.
- mov.l r3,@-r15
- " FGR_SAVE "
- sts.l pr,@-r15
- mov r0,r4 ! PLT type
- mov r2,r5 ! link map address
- sts pr,r7 ! return address
- " FUN_ADDR "
- jsr @r0 ! Call resolver.
- mov r1,r6 ! reloc offset
- lds.l @r15+,pr ! Get register content back.
- " FGR_LOAD "
- mov.l @r15+,r3
- shal r3 ! Lode T flag.
- mov.l @r15+,r12
- mov.l @r15+,r7
- mov.l @r15+,r6
- mov.l @r15+,r5
- mov.l @r15+,r4
- jmp @r0 ! Jump to function address.
- mov.l @r15+,r3
- .align 2
-3:
- .long " GOTJMP (fixup) "
- .size _dl_runtime_resolve, .-_dl_runtime_resolve
- .size _dl_runtime_profile, .-_dl_runtime_profile
- .previous
-");
-#endif
+#define ELF_MACHINE_RUNTIME_FIXUP_PARAMS plt_type
/* Mask identifying addresses reserved for the user program,
where the dynamic linker should not map anything. */
add r0,r12\n\
.align 2\n\
1: .long _GLOBAL_OFFSET_TABLE_\n\
-2: ! Store the highest stack address\n\
- mov.l .L_stack_end,r0\n\
- mov.l @(r0,r12),r0\n\
- mov.l r15,@r0\n\
- ! See if we were run as a command with the executable file\n\
- ! name as an extra leading argument.\n\
- mov.l .L_dl_skip_args,r0\n\
- mov.l @(r0,r12),r0\n\
- mov.l @r0,r0\n\
- ! Get the original argument count.\n\
+2: ! Get the original argument count.\n\
mov.l @r15,r5\n\
- ! Subtract _dl_skip_args from it.\n\
- sub r0,r5\n\
- ! Adjust the stack pointer to skip _dl_skip_args words.\n\
- shll2 r0\n\
- add r0,r15\n\
- ! Store back the modified argument count.\n\
- mov.l r5,@r15\n\
! Compute argv address and envp.\n\
mov r15,r6\n\
add #4,r6\n\
mov r5,r7\n\
shll2 r7\n\
add r15,r7\n\
+ add #8,r7\n\
mov.l .L_dl_loaded,r0\n\
mov.l @(r0,r12),r0\n\
mov.l @r0,r4\n\
add r1,r0\n\
jsr @r0\n\
nop\n\
-1: ! Clear the startup flag.\n\
- mov.l .L_dl_starting_up,r0\n\
- mov.l @(r0,r12),r0\n\
- mov #0,r2\n\
- mov.l r2,@r0\n\
- ! Pass our finalizer function to the user in r4, as per ELF ABI.\n\
+1: ! Pass our finalizer function to the user in r4, as per ELF ABI.\n\
mov.l .L_dl_fini,r0\n\
mov.l @(r0,r12),r4\n\
! Jump to the user's entry point.\n\
.align 2\n\
.L_dl_start:\n\
.long _dl_start@PLT\n\
-.L_stack_end:\n\
- .long __libc_stack_end@GOT\n\
-.L_dl_skip_args:\n\
- .long _dl_skip_args@GOT\n\
.L_dl_init:\n\
.long _dl_init@PLT\n\
.L_dl_loaded:\n\
- .long _dl_loaded@GOT\n\
-.L_dl_starting_up:\n\
- .long _dl_starting_up@GOT\n\
+ .long _rtld_local@GOT\n\
.L_dl_fini:\n\
.long _dl_fini@GOT\n\
+ .type __fpscr_values,@object\n\
+ .global __fpscr_values\n\
+__fpscr_values:\n\
+ .long 0\n\
+ .long 0x80000\n\
+ .weak __fpscr_values\n\
.previous\n\
");
-/* 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_SH_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_SH_JMP_SLOT)
+/* 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_COPY 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 || (type) == R_SH_TLS_DTPMOD32 \
+ || (type) == R_SH_TLS_DTPOFF32 || (type) == R_SH_TLS_TPOFF32) \
+ * ELF_RTYPE_CLASS_PLT) \
+ | (((type) == R_SH_COPY) * ELF_RTYPE_CLASS_COPY))
/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
#define ELF_MACHINE_JMP_SLOT R_SH_JMP_SLOT
_dl_sysdep_start. */
#define DL_PLATFORM_INIT dl_platform_init ()
-extern const char *_dl_platform;
-
static inline void __attribute__ ((unused))
dl_platform_init (void)
{
- if (_dl_platform != NULL && *_dl_platform == '\0')
+ if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
/* Avoid an empty string which would disturb us. */
- _dl_platform = NULL;
+ GLRO(dl_platform) = NULL;
}
static inline Elf32_Addr
elf_machine_fixup_plt (struct link_map *map, lookup_t t,
+ const ElfW(Sym) *refsym, const ElfW(Sym) *sym,
const Elf32_Rela *reloc,
Elf32_Addr *reloc_addr, Elf32_Addr value)
{
return value + reloc->r_addend;
}
-#endif /* !dl_machine_h */
-
-#ifdef RESOLVE
+#define ARCH_LA_PLTENTER sh_gnu_pltenter
+#define ARCH_LA_PLTEXIT sh_gnu_pltexit
-/* SH never uses Elf32_Rel relocations. */
-#define ELF_MACHINE_NO_REL 1
+#endif /* !dl_machine_h */
-extern char **_dl_argv;
+#ifdef RESOLVE_MAP
/* 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 Elf32_Rela *reloc,
- const Elf32_Sym *sym, const struct r_found_version *version,
- Elf32_Addr *const reloc_addr)
+__attribute ((always_inline))
+elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[],
+ const Elf32_Rela *reloc, const Elf32_Sym *sym,
+ const struct r_found_version *version,
+ void *const reloc_addr_arg, int skip_ifunc)
{
- if (ELF32_R_TYPE (reloc->r_info) == R_SH_RELATIVE)
+ Elf32_Addr *const reloc_addr = reloc_addr_arg;
+ const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
+ Elf32_Addr value;
+
+#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; \
+ } \
+ }
+
+ if (__glibc_unlikely (r_type == R_SH_RELATIVE))
{
#ifndef RTLD_BOOTSTRAP
- if (map != &_dl_rtld_map) /* Already done in rtld itself. */
+ if (map != &GL(dl_rtld_map)) /* Already done in rtld itself. */
#endif
{
if (reloc->r_addend)
- *reloc_addr = map->l_addr + reloc->r_addend;
+ value = map->l_addr + reloc->r_addend;
else
- *reloc_addr += map->l_addr;
+ {
+ COPY_UNALIGNED_WORD (reloc_addr_arg, &value,
+ (int) reloc_addr_arg & 3);
+ value += map->l_addr;
+ }
+ COPY_UNALIGNED_WORD (&value, reloc_addr_arg,
+ (int) reloc_addr_arg & 3);
}
}
- else if (ELF32_R_TYPE (reloc->r_info) != R_SH_NONE)
+#ifndef RTLD_BOOTSTRAP
+ else if (__glibc_unlikely (r_type == R_SH_NONE))
+ return;
+#endif
+ else
{
const Elf32_Sym *const refsym = sym;
- Elf32_Addr value = RESOLVE (&sym, version, ELF32_R_TYPE (reloc->r_info));
- if (sym)
- value += sym->st_value;
+ struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version,
+ r_type);
+
+ value = SYMBOL_ADDRESS (sym_map, sym, true);
value += reloc->r_addend;
- switch (ELF32_R_TYPE (reloc->r_info))
+ switch (r_type)
{
case R_SH_COPY:
if (sym == NULL)
found. */
break;
if (sym->st_size > refsym->st_size
- || (sym->st_size < refsym->st_size && _dl_verbose))
+ || (sym->st_size < refsym->st_size && GLRO(dl_verbose)))
{
const char *strtab;
strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]);
_dl_error_printf ("\
-%s: Symbol `%s' has different size in shared object, consider re-linking\n"
- _dl_argv[0] ?: "<program name unknown>",
- strtab + refsym->st_name);
+%s: Symbol `%s' has different size in shared object, consider re-linking\n",
+ RTLD_PROGNAME, strtab + refsym->st_name);
}
- memcpy (reloc_addr, (void *) value, MIN (sym->st_size,
- refsym->st_size));
+ memcpy (reloc_addr_arg, (void *) value,
+ MIN (sym->st_size, refsym->st_size));
break;
case R_SH_GLOB_DAT:
case R_SH_JMP_SLOT:
+ /* These addresses are always aligned. */
*reloc_addr = value;
break;
+ /* XXX Remove TLS relocations which are not needed. */
+ case R_SH_TLS_DTPMOD32:
+#ifdef RTLD_BOOTSTRAP
+ /* During startup the dynamic linker is always the module
+ with index 1.
+ XXX If this relocation is necessary move before RESOLVE
+ call. */
+ *reloc_addr = 1;
+#else
+ /* Get the information from the link map returned by the
+ resolv function. */
+ if (sym_map != NULL)
+ *reloc_addr = sym_map->l_tls_modid;
+#endif
+ break;
+ case R_SH_TLS_DTPOFF32:
+#ifndef RTLD_BOOTSTRAP
+ /* During relocation all TLS symbols are defined and used.
+ Therefore the offset is already correct. */
+ if (sym != NULL)
+ *reloc_addr = sym->st_value;
+#endif
+ break;
+ case R_SH_TLS_TPOFF32:
+ /* The offset is positive, afterward from the thread pointer. */
+#ifdef RTLD_BOOTSTRAP
+ *reloc_addr = map->l_tls_offset + sym->st_value + reloc->r_addend;
+#else
+ /* We know the offset of object the symbol is contained in.
+ It is a positive value which will be added to the thread
+ pointer. To get the variable position in the TLS block
+ we add the offset from that of the TLS block. */
+ if (sym != NULL)
+ {
+ CHECK_STATIC_TLS (map, sym_map);
+ *reloc_addr = sym_map->l_tls_offset + sym->st_value
+ + reloc->r_addend;
+ }
+#endif
+ break;
case R_SH_DIR32:
{
-#ifndef RTLD_BOOTSTRAP
+#if !defined 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. */
+# ifndef SHARED
weak_extern (_dl_rtld_map);
- if (map == &_dl_rtld_map)
+# endif
+ if (map == &GL(dl_rtld_map))
/* Undo the relocation done here during bootstrapping.
Now we will relocate it anew, possibly using a
binding found in the user program or a loaded library
rather than the dynamic linker's built-in definitions
used while loading those libraries. */
- value -= map->l_addr + refsym->st_value + reloc->r_addend;
+ value -= SYMBOL_ADDRESS (map, refsym, true) + reloc->r_addend;
#endif
- *reloc_addr = value;
+ COPY_UNALIGNED_WORD (&value, reloc_addr_arg,
+ (int) reloc_addr_arg & 3);
break;
}
case R_SH_REL32:
- *reloc_addr = (value - (Elf32_Addr) reloc_addr);
+ value = (value - (Elf32_Addr) reloc_addr);
+ COPY_UNALIGNED_WORD (&value, reloc_addr_arg,
+ (int) reloc_addr_arg & 3);
break;
default:
- _dl_reloc_bad_type (map, ELF32_R_TYPE (reloc->r_info), 0);
+ _dl_reloc_bad_type (map, r_type, 0);
break;
}
}
}
static inline void
-elf_machine_lazy_rel (struct link_map *map,
- Elf32_Addr l_addr, const Elf32_Rela *reloc)
+__attribute__ ((always_inline))
+elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc,
+ void *const reloc_addr_arg)
+{
+ Elf32_Addr value;
+
+ if (reloc->r_addend)
+ value = l_addr + reloc->r_addend;
+ else
+ {
+ COPY_UNALIGNED_WORD (reloc_addr_arg, &value, (int) reloc_addr_arg & 3);
+ value += l_addr;
+ }
+ COPY_UNALIGNED_WORD (&value, reloc_addr_arg, (int) reloc_addr_arg & 3);
+
+#undef COPY_UNALIGNED_WORD
+}
+
+static inline void
+__attribute__ ((always_inline))
+elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[],
+ Elf32_Addr l_addr, const Elf32_Rela *reloc,
+ int skip_ifunc)
{
Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
/* Check for unexpected PLT reloc type. */
if (ELF32_R_TYPE (reloc->r_info) == R_SH_JMP_SLOT)
- *reloc_addr += l_addr;
+ {
+ if (__builtin_expect (map->l_mach.plt, 0) == 0)
+ *reloc_addr += l_addr;
+ else
+ *reloc_addr =
+ map->l_mach.plt
+ + (((Elf32_Addr) reloc_addr) - map->l_mach.gotplt) * 7;
+ }
else
_dl_reloc_bad_type (map, ELF32_R_TYPE (reloc->r_info), 1);
}
-#endif /* RESOLVE */
+#endif /* RESOLVE_MAP */
projects / thirdparty / glibc.git / blobdiff