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Do not emit __gnu_lto_v1 symbol.

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2019-07-22  Martin Liska  <mliska@suse.cz>

	* config/avr/avr.c (avr_asm_output_aligned_decl_common): Update
	comment.
	* toplev.c (compile_file): Do not emit __gnu_lto_v1 symbol.
2019-07-22  Martin Liska  <mliska@suse.cz>

	* config/pa/stublib.c: Remove stub symbol __gnu_lto_v1.
	* config/pa/t-stublib: Likewise.
2019-07-22  Martin Liska  <mliska@suse.cz>

	* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
	Do not search for gnu_lto_v1, but search for first '\0'.

From-SVN: r273662
This commit is contained in:
Martin Liska 2019-07-22 09:34:47 +02:00 committed by Martin Liska
parent d1caf05a89
commit a861990d21
8 changed files with 26 additions and 46 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2019-07-22 Martin Liska <mliska@suse.cz>
* config/avr/avr.c (avr_asm_output_aligned_decl_common): Update
comment.
* toplev.c (compile_file): Do not emit __gnu_lto_v1 symbol.
2019-07-22 Martin Liska <mliska@suse.cz>
* lto-section-in.c (lto_get_section_data):

2
gcc/config/avr/avr.c
View File

@ -10163,7 +10163,7 @@ avr_asm_output_aligned_decl_common (FILE * stream,
return;
}
/* __gnu_lto_v1 etc. are just markers for the linker injected by toplev.c.
/* __gnu_lto_slim is just a marker for the linker injected by toplev.c.
There is no need to trigger __do_clear_bss code for them. */
if (!STR_PREFIX_P (name, "__gnu_lto"))

21
gcc/toplev.c
View File

@ -543,27 +543,6 @@ compile_file (void)
process_pending_assemble_externals ();
}
/* Emit LTO marker if LTO info has been previously emitted. This is
used by collect2 to determine whether an object file contains IL.
We used to emit an undefined reference here, but this produces
link errors if an object file with IL is stored into a shared
library without invoking lto1. */
if (flag_generate_lto || flag_generate_offload)
{
#if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
"__gnu_lto_v1",
HOST_WIDE_INT_1U, 8);
#elif defined ASM_OUTPUT_ALIGNED_COMMON
ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
HOST_WIDE_INT_1U, 8);
#else
ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
HOST_WIDE_INT_1U,
HOST_WIDE_INT_1U);
#endif
}
/* Let linker plugin know that this is a slim object and must be LTOed
even when user did not ask for it. */
if (flag_generate_lto && !flag_fat_lto_objects)

5
libgcc/ChangeLog
View File

@ -1,3 +1,8 @@
2019-07-22 Martin Liska <mliska@suse.cz>
* config/pa/stublib.c: Remove stub symbol __gnu_lto_v1.
* config/pa/t-stublib: Likewise.
2019-07-22 Stafford Horne <shorne@gmail.com>
PR target/90362

4
libgcc/config/pa/stublib.c
View File

@ -115,7 +115,3 @@ pthread_once (void)
return 0;
}
#endif
#ifdef L_gnu_lto_v1
char gnu_lto_v1;
#endif

6
libgcc/config/pa/t-stublib
View File

@ -3,8 +3,7 @@ LIBGCCSTUB_OBJS = rfi-stub.o dfi-stub.o ritm-stub.o ditm-stub.o \
pthread_default_stacksize_np-stub.o \
pthread_mutex_lock-stub.o \
pthread_mutex_unlock-stub.o \
pthread_once-stub.o \
gnu_lto_v1-stub.o
pthread_once-stub.o
rfi-stub.o: $(srcdir)/config/pa/stublib.c
$(gcc_compile) -c -O2 -DL_register_frame_info $<
@ -36,9 +35,6 @@ pthread_mutex_unlock-stub.o: $(srcdir)/config/pa/stublib.c
pthread_once-stub.o: $(srcdir)/config/pa/stublib.c
$(gcc_compile) -c -O2 -DL_pthread_once $<
gnu_lto_v1-stub.o: $(srcdir)/config/pa/stublib.c
$(gcc_compile) -c -O2 -DL_gnu_lto_v1 $<
libgcc_stub.a: $(LIBGCCSTUB_OBJS)
-rm -rf $@
$(AR) rc $@ $(LIBGCCSTUB_OBJS)

5
libiberty/ChangeLog
View File

@ -1,3 +1,8 @@
2019-07-22 Martin Liska <mliska@suse.cz>
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
Do not search for gnu_lto_v1, but search for first '\0'.
2019-07-18 Eduard-Mihai Burtescu <eddyb@lyken.rs>
* cplus-dem.c: Include rust-demangle.h.

23
libiberty/simple-object-elf.c
View File

@ -1358,9 +1358,8 @@ simple_object_elf_copy_lto_debug_sections (simple_object_read *sobj,
return errmsg;
}
/* If we are processing .symtab purge __gnu_lto_v1 and
__gnu_lto_slim symbols from it and any symbols in discarded
sections. */
/* If we are processing .symtab purge __gnu_lto_slim symbol
from it and any symbols in discarded sections. */
if (sh_type == SHT_SYMTAB)
{
unsigned entsize = ELF_FETCH_FIELD (type_functions, ei_class, Shdr,
@ -1380,14 +1379,9 @@ simple_object_elf_copy_lto_debug_sections (simple_object_read *sobj,
sobj->offset + stroff,
(unsigned char *)strings,
strsz, &errmsg, err);
/* Find gnu_lto_ in strings. */
while ((gnu_lto = (char *) memchr (gnu_lto, 'g',
strings + strsz - gnu_lto)))
if (strncmp (gnu_lto, "gnu_lto_v1",
strings + strsz - gnu_lto) == 0)
break;
else
gnu_lto++;
/* Find first '\0' in strings. */
gnu_lto = (char *) memchr (gnu_lto, '\0',
strings + strsz - gnu_lto + 1);
/* Read the section index table if present. */
if (symtab_indices_shndx[i - 1] != 0)
{
@ -1461,10 +1455,9 @@ simple_object_elf_copy_lto_debug_sections (simple_object_read *sobj,
undefined and sharing the gnu_lto_ name. */
bind = STB_WEAK;
other = STV_HIDDEN;
if (gnu_lto)
ELF_SET_FIELD (type_functions, ei_class, Sym,
ent, st_name, Elf_Word,
gnu_lto - strings);
ELF_SET_FIELD (type_functions, ei_class, Sym,
ent, st_name, Elf_Word,
gnu_lto - strings);
ELF_SET_FIELD (type_functions, ei_class, Sym,
ent, st_shndx, Elf_Half, SHN_UNDEF);
}