summaryrefslogtreecommitdiff
path: root/ldso/ldso/xtensa
diff options
context:
space:
mode:
Diffstat (limited to 'ldso/ldso/xtensa')
-rw-r--r--ldso/ldso/xtensa/dl-debug.h77
-rw-r--r--ldso/ldso/xtensa/dl-startup.h2
-rw-r--r--ldso/ldso/xtensa/dl-sysdep.h9
-rw-r--r--ldso/ldso/xtensa/dl-tlsdesc.S96
-rw-r--r--ldso/ldso/xtensa/elfinterp.c51
5 files changed, 176 insertions, 59 deletions
diff --git a/ldso/ldso/xtensa/dl-debug.h b/ldso/ldso/xtensa/dl-debug.h
index 4128d9452..18beae5ca 100644
--- a/ldso/ldso/xtensa/dl-debug.h
+++ b/ldso/ldso/xtensa/dl-debug.h
@@ -8,54 +8,31 @@
static const char * const _dl_reltypes_tab[] =
{
- "R_XTENSA_NONE",
- "R_XTENSA_32",
- "R_XTENSA_RTLD",
- "R_XTENSA_GLOB_DAT",
- "R_XTENSA_JMP_SLOT",
- "R_XTENSA_RELATIVE",
- "R_XTENSA_PLT",
- "R_XTENSA_UNUSED7",
- "R_XTENSA_OP0",
- "R_XTENSA_OP1",
- "R_XTENSA_OP2",
- "R_XTENSA_ASM_EXPAND",
- "R_XTENSA_ASM_SIMPLIFY",
- "R_XTENSA_UNUSED13",
- "R_XTENSA_UNUSED14",
- "R_XTENSA_GNU_VTINHERIT",
- "R_XTENSA_GNU_VTENTRY",
- "R_XTENSA_DIFF8",
- "R_XTENSA_DIFF16",
- "R_XTENSA_DIFF32",
- "R_XTENSA_SLOT0_OP",
- "R_XTENSA_SLOT1_OP",
- "R_XTENSA_SLOT2_OP",
- "R_XTENSA_SLOT3_OP",
- "R_XTENSA_SLOT4_OP",
- "R_XTENSA_SLOT5_OP",
- "R_XTENSA_SLOT6_OP",
- "R_XTENSA_SLOT7_OP",
- "R_XTENSA_SLOT8_OP",
- "R_XTENSA_SLOT9_OP",
- "R_XTENSA_SLOT10_OP",
- "R_XTENSA_SLOT11_OP",
- "R_XTENSA_SLOT12_OP",
- "R_XTENSA_SLOT13_OP",
- "R_XTENSA_SLOT14_OP",
- "R_XTENSA_SLOT0_ALT",
- "R_XTENSA_SLOT1_ALT",
- "R_XTENSA_SLOT2_ALT",
- "R_XTENSA_SLOT3_ALT",
- "R_XTENSA_SLOT4_ALT",
- "R_XTENSA_SLOT5_ALT",
- "R_XTENSA_SLOT6_ALT",
- "R_XTENSA_SLOT7_ALT",
- "R_XTENSA_SLOT8_ALT",
- "R_XTENSA_SLOT9_ALT",
- "R_XTENSA_SLOT10_ALT",
- "R_XTENSA_SLOT11_ALT",
- "R_XTENSA_SLOT12_ALT",
- "R_XTENSA_SLOT13_ALT",
- "R_XTENSA_SLOT14_ALT"
+ [0] "R_XTENSA_NONE", "R_XTENSA_32",
+ [2] "R_XTENSA_RTLD", "R_XTENSA_GLOB_DAT",
+ [4] "R_XTENSA_JMP_SLOT", "R_XTENSA_RELATIVE",
+ [6] "R_XTENSA_PLT", "R_XTENSA_UNUSED7",
+ [8] "R_XTENSA_OP0", "R_XTENSA_OP1",
+ [10] "R_XTENSA_OP2", "R_XTENSA_ASM_EXPAND",
+ [12] "R_XTENSA_ASM_SIMPLIFY", "R_XTENSA_UNUSED13",
+ [14] "R_XTENSA_UNUSED14", "R_XTENSA_GNU_VTINHERIT",
+ [16] "R_XTENSA_GNU_VTENTRY", "R_XTENSA_DIFF8",
+ [18] "R_XTENSA_DIFF16", "R_XTENSA_DIFF32",
+ [20] "R_XTENSA_SLOT0_OP", "R_XTENSA_SLOT1_OP",
+ [22] "R_XTENSA_SLOT2_OP", "R_XTENSA_SLOT3_OP",
+ [24] "R_XTENSA_SLOT4_OP", "R_XTENSA_SLOT5_OP",
+ [26] "R_XTENSA_SLOT6_OP", "R_XTENSA_SLOT7_OP",
+ [28] "R_XTENSA_SLOT8_OP", "R_XTENSA_SLOT9_OP",
+ [30] "R_XTENSA_SLOT10_OP", "R_XTENSA_SLOT11_OP",
+ [32] "R_XTENSA_SLOT12_OP", "R_XTENSA_SLOT13_OP",
+ [34] "R_XTENSA_SLOT14_OP", "R_XTENSA_SLOT0_ALT",
+ [36] "R_XTENSA_SLOT1_ALT", "R_XTENSA_SLOT2_ALT",
+ [38] "R_XTENSA_SLOT3_ALT", "R_XTENSA_SLOT4_ALT",
+ [40] "R_XTENSA_SLOT5_ALT", "R_XTENSA_SLOT6_ALT",
+ [42] "R_XTENSA_SLOT7_ALT", "R_XTENSA_SLOT8_ALT",
+ [44] "R_XTENSA_SLOT9_ALT", "R_XTENSA_SLOT10_ALT",
+ [46] "R_XTENSA_SLOT11_ALT", "R_XTENSA_SLOT12_ALT",
+ [48] "R_XTENSA_SLOT13_ALT", "R_XTENSA_SLOT14_ALT",
+ [50] "R_XTENSA_TLSDESC_FN", "R_XTENSA_TLSDESC_ARG",
+ [52] "R_XTENSA_TLS_TPOFF"
};
diff --git a/ldso/ldso/xtensa/dl-startup.h b/ldso/ldso/xtensa/dl-startup.h
index b135a4cb8..70a6255d9 100644
--- a/ldso/ldso/xtensa/dl-startup.h
+++ b/ldso/ldso/xtensa/dl-startup.h
@@ -11,7 +11,7 @@
__asm__ (
" .text\n"
" .align 4\n"
- " .literal_position\n"
+ " .literal_position\n"
" .global _start\n"
" .type _start, @function\n"
" .hidden _start\n"
diff --git a/ldso/ldso/xtensa/dl-sysdep.h b/ldso/ldso/xtensa/dl-sysdep.h
index a0ed4e5f2..148de5b95 100644
--- a/ldso/ldso/xtensa/dl-sysdep.h
+++ b/ldso/ldso/xtensa/dl-sysdep.h
@@ -78,10 +78,13 @@ typedef struct xtensa_got_location_struct {
struct elf_resolve;
extern unsigned long _dl_linux_resolver (struct elf_resolve *, int);
-/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
- undefined references should not be allowed to define the value. */
+/* 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. */
#define elf_machine_type_class(type) \
- (((type) == R_XTENSA_JMP_SLOT) * ELF_RTYPE_CLASS_PLT)
+ (((type) == R_XTENSA_JMP_SLOT || (type) == R_XTENSA_TLS_TPOFF \
+ || (type) == R_XTENSA_TLSDESC_FN || (type) == R_XTENSA_TLSDESC_ARG) \
+ * ELF_RTYPE_CLASS_PLT)
/* Return the link-time address of _DYNAMIC. */
static __always_inline Elf32_Addr
diff --git a/ldso/ldso/xtensa/dl-tlsdesc.S b/ldso/ldso/xtensa/dl-tlsdesc.S
new file mode 100644
index 000000000..a6ebc949e
--- /dev/null
+++ b/ldso/ldso/xtensa/dl-tlsdesc.S
@@ -0,0 +1,96 @@
+/* Thread-local storage handling in the ELF dynamic linker. Xtensa version.
+ Copyright (C) 2012-2013 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 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#include <tls.h>
+#include "tlsdesc.h"
+
+
+ .text
+ .align 4
+ .hidden _dl_tlsdesc_return
+ .global _dl_tlsdesc_return
+ .type _dl_tlsdesc_return, @function
+_dl_tlsdesc_return:
+ entry a1, 16
+ rur.threadptr a3
+ add a2, a2, a3
+ retw
+ .size _dl_tlsdesc_return, .-_dl_tlsdesc_return
+
+#ifdef SHARED
+
+
+ /* This function is used for symbols that need dynamic TLS.
+
+ The argument passed to this function points to the TLS descriptor.
+
+ The assembly code that follows is a rendition of the following
+ C code, hand-optimized a little bit.
+
+ ptrdiff_t
+ _dl_tlsdesc_dynamic(struct tlsdesc_dynamic_arg *td)
+ {
+ dtv_t *dtv = (dtv_t *)THREAD_DTV();
+ if (td->gen_count <= dtv[0].counter
+ && dtv[td->tlsinfo.ti_module].pointer.val
+ != TLS_DTV_UNALLOCATED)
+ return dtv[td->tlsinfo.ti_module].pointer.val
+ + td->tlsinfo.ti_offset - __builtin_thread_pointer();
+ return __tls_get_addr (&td->tlsinfo) - __builtin_thread_pointer();
+ }
+ */
+
+ .align 4
+ .hidden _dl_tlsdesc_dynamic
+ .global _dl_tlsdesc_dynamic
+ .type _dl_tlsdesc_dynamic, @function
+_dl_tlsdesc_dynamic:
+ entry a1, 32
+
+ /* dtv_t *dtv = (dtv_t *)THREAD_DTV(); */
+ rur.threadptr a3
+ l32i a4, a3, 0
+
+ /* if (td->gen_count <= dtv[0].counter */
+ l32i a6, a2, TLSDESC_GEN_COUNT
+ l32i a7, a4, 0
+ blt a7, a6, .Lslow
+
+ /* && dtv[td->tlsinfo.ti_module].pointer.val != TLS_DTV_UNALLOCATED) */
+ l32i a6, a2, TLSDESC_MODID
+ addx8 a6, a3, a6
+ l32i a6, a6, 0
+ beqi a6, -1, .Lslow
+
+ /* return dtv[td->tlsinfo.ti_module].pointer.val
+ + td->tlsinfo.ti_offset - __builtin_thread_pointer(); */
+ l32i a6, a2, TLSDESC_MODOFF
+ sub a2, a6, a3
+ retw
+
+ /* return __tls_get_addr (&td->tlsinfo) - __builtin_thread_pointer(); */
+.Lslow:
+ mov a10, a2
+ movi a8, __tls_get_addr
+ callx8 a8
+ sub a2, a10, a3
+ retw
+ .size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic
+
+#endif /* SHARED */
diff --git a/ldso/ldso/xtensa/elfinterp.c b/ldso/ldso/xtensa/elfinterp.c
index b4cf9752d..1397e95c9 100644
--- a/ldso/ldso/xtensa/elfinterp.c
+++ b/ldso/ldso/xtensa/elfinterp.c
@@ -31,6 +31,8 @@
*/
#include "ldso.h"
+#include "dl-tls.h"
+#include "tlsdeschtab.h"
unsigned long
_dl_linux_resolver (struct elf_resolve *tpnt, int reloc_entry)
@@ -146,6 +148,9 @@ _dl_do_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope,
int reloc_type;
int symtab_index;
char *symname;
+#if defined USE_TLS && USE_TLS
+ struct elf_resolve *tls_tpnt = NULL;
+#endif
struct symbol_ref sym_ref;
ElfW(Addr) *reloc_addr;
ElfW(Addr) symbol_addr;
@@ -172,15 +177,22 @@ _dl_do_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope,
* here, so all bases should be covered.
*/
if (unlikely (!symbol_addr &&
+ ELF_ST_TYPE (sym_ref.sym->st_info) != STT_TLS &&
ELF_ST_BIND (sym_ref.sym->st_info) != STB_WEAK)) {
- _dl_dprintf (2, "%s: can't resolve symbol '%s'\n",
- _dl_progname, symname);
- _dl_exit (1);
+ return 1;
}
if (_dl_trace_prelink) {
_dl_debug_lookup (symname, tpnt, &symtab[symtab_index],
&sym_ref, elf_machine_type_class(reloc_type));
}
+#if defined USE_TLS && USE_TLS
+ tls_tpnt = sym_ref.tpnt;
+#endif
+ } else {
+ symbol_addr =symtab[symtab_index].st_value;
+#if defined USE_TLS && USE_TLS
+ tls_tpnt = tpnt;
+#endif
}
#if defined (__SUPPORT_LD_DEBUG__)
@@ -198,8 +210,8 @@ _dl_do_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope,
case R_XTENSA_RTLD:
if (rpnt->r_addend == 1) {
- /* Grab the function pointer stashed at the beginning of the
- GOT by the GOT_INIT function. */
+ /* Grab the function pointer stashed at the beginning
+ of the GOT by the GOT_INIT function. */
*reloc_addr = *(ElfW(Addr) *) tpnt->dynamic_info[DT_PLTGOT];
} else if (rpnt->r_addend == 2) {
/* Store the link map for the object. */
@@ -213,6 +225,35 @@ _dl_do_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope,
*reloc_addr += tpnt->loadaddr + rpnt->r_addend;
break;
+#if defined USE_TLS && USE_TLS
+ case R_XTENSA_TLS_TPOFF:
+ CHECK_STATIC_TLS((struct link_map *) tls_tpnt);
+ *reloc_addr = symbol_addr + tls_tpnt->l_tls_offset + rpnt->r_addend;
+ break;
+ case R_XTENSA_TLSDESC_FN:
+#ifndef SHARED
+ CHECK_STATIC_TLS((struct link_map *) tls_tpnt);
+#else
+ if (!TRY_STATIC_TLS ((struct link_map *) tls_tpnt))
+ *reloc_addr = (ElfW(Addr)) _dl_tlsdesc_dynamic;
+ else
+#endif
+ *reloc_addr = (ElfW(Addr)) _dl_tlsdesc_return;
+ break;
+ case R_XTENSA_TLSDESC_ARG:
+#ifndef SHARED
+ CHECK_STATIC_TLS((struct link_map *) tls_tpnt);
+#else
+ if (!TRY_STATIC_TLS ((struct link_map *) tls_tpnt))
+ *reloc_addr = (ElfW(Addr))
+ _dl_make_tlsdesc_dynamic((struct link_map *) tls_tpnt,
+ symbol_addr + *reloc_addr);
+ else
+#endif
+ *reloc_addr += symbol_addr + tls_tpnt->l_tls_offset;
+ break;
+#endif
+
default:
return -1; /* Calls _dl_exit(1). */
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-30 08:30:33 +0000