V5 [PATCH] ld: Add --export-dynamic-symbol and --export-dynamic-symbol-list
H.J. Lu
hjl.tools@gmail.com
Wed May 27 20:24:20 GMT 2020
On Wed, May 27, 2020 at 9:24 AM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> On Wed, May 27, 2020 at 9:19 AM Fangrui Song <maskray@google.com> wrote:
> >
> > On 2020-05-27, H.J. Lu wrote:
> > >On Sat, May 23, 2020 at 2:56 PM Fangrui Song <maskray@google.com> wrote:
> > >>
> > >> On 2020-05-23, H.J. Lu wrote:
> > >> >On Sat, May 23, 2020 at 11:29 AM Fangrui Song <maskray@google.com> wrote:
> > >> >>
> > >> >> On 2020-05-23, H.J. Lu wrote:
> > >> >> >From: Fangrui Song <maskray@google.com>
> > >> >> >
> > >> >> >--export-dynamic-symbol-list is like a dynamic list, but without
> > >> >> >the symbolic property for unspecified symbols.
> > >> >> >
> > >> >> >When creating an executable, --export-dynamic-symbol-list is treated
> > >> >> >like --dynamic-list.
> > >> >> >
> > >> >> >When creating a shared library, it is treated like --dynamic-list if
> > >> >> >-Bsymbolic or --dynamic-list are used, otherwise, it is ignored, so
> > >> >> >that references to matched symbols will not be bound to the definitions
> > >> >> >within the shared library.
> > >> >> >
> > >> >> >2020-05-XX Fangrui Song <maskray@google.com>
> > >> >> > H.J. Lu <hongjiu.lu@intel.com>
> > >> >> >
> > >> >> > PR ld/25910
> > >> >> > * NEWS: Mention --export-dynamic-symbol[-list].
> > >> >> > * ld.texi: Document --export-dynamic-symbol[-list].
> > >> >> > * ldgram.y: Pass current_dynamic_list_p to
> > >> >> > lang_append_dynamic_list.
> > >> >> > * ldlang.c (current_dynamic_list_p): New.
> > >> >> > (ang_append_dynamic_list): Updated to take a pointer to
> > >> >> > struct bfd_elf_dynamic_list * argument instead of using
> > >> >> > link_info.dynamic_list.
> > >> >> > (lang_append_dynamic_list_cpp_typeinfo): Pass
> > >> >> > &link_info.dynamic_list to ang_append_dynamic_list.
> > >> >> > (lang_append_dynamic_list_cpp_new): Likewise.
> > >> >> > * ldlang.h (current_dynamic_list_p): New.
> > >> >> > (lang_append_dynamic_list): Add a pointer to
> > >> >> > struct bfd_elf_dynamic_list * argument.
> > >> >> > * ldlex.h (option_values): Add OPTION_EXPORT_DYNAMIC_SYMBOL and
> > >> >> > OPTION_EXPORT_DYNAMIC_SYMBOL_LIST.
> > >> >> > * lexsup.c (ld_options): Add entries for
> > >> >> > OPTION_EXPORT_DYNAMIC_SYMBOL and
> > >> >> > OPTION_EXPORT_DYNAMIC_SYMBOL_LIST.
> > >> >> > (parse_args): Handle --export-dynamic-symbol and
> > >> >> > --export-dynamic-symbol-list.
> > >> >> > * testsuite/ld-dynamic/export-dynamic-symbol-1.d: New.
> > >> >> > * testsuite/ld-dynamic/export-dynamic-symbol-2.d: New.
> > >> >> > * testsuite/ld-dynamic/export-dynamic-symbol-glob.d: New.
> > >> >> > * testsuite/ld-dynamic/export-dynamic-symbol-list-1.d: New.
> > >> >> > * testsuite/ld-dynamic/export-dynamic-symbol-list-2.d: New.
> > >> >> > * testsuite/ld-dynamic/export-dynamic-symbol-list-glob.d: New.
> > >> >> > * testsuite/ld-dynamic/export-dynamic-symbol.exp: New.
> > >> >> > * testsuite/ld-dynamic/export-dynamic-symbol.s: New.
> > >> >> > * testsuite/ld-dynamic/foo-bar.list: New.
> > >> >> > * testsuite/ld-dynamic/foo.list: New.
> > >> >> > * testsuite/ld-dynamic/foo.s: New.
> > >> >> > * testsuite/ld-dynamic/fstar.list: New.
> > >> >> > * testsuite/ld-elf/dlempty.list: New.
> > >> >> > * testsuite/ld-elf/shared.exp: Add tests for
> > >> >> > --export-dynamic-symbol and --export-dynamic-symbol-list.
> > >> >> >---
> > >> >> > ld/NEWS | 3 +
> > >> >> > ld/ld.texi | 18 +++++
> > >> >> > ld/ldgram.y | 2 +-
> > >> >> > ld/ldlang.c | 16 ++--
> > >> >> > ld/ldlang.h | 5 +-
> > >> >> > ld/ldlex.h | 2 +
> > >> >> > ld/lexsup.c | 75 +++++++++++++++++++
> > >> >> > .../ld-dynamic/export-dynamic-symbol-1.d | 9 +++
> > >> >> > .../ld-dynamic/export-dynamic-symbol-2.d | 9 +++
> > >> >> > .../ld-dynamic/export-dynamic-symbol-glob.d | 8 ++
> > >> >> > .../ld-dynamic/export-dynamic-symbol-list-1.d | 9 +++
> > >> >> > .../ld-dynamic/export-dynamic-symbol-list-2.d | 9 +++
> > >> >> > .../export-dynamic-symbol-list-glob.d | 8 ++
> > >> >> > .../ld-dynamic/export-dynamic-symbol.exp | 39 ++++++++++
> > >> >> > .../ld-dynamic/export-dynamic-symbol.s | 9 +++
> > >> >> > ld/testsuite/ld-dynamic/foo-bar.list | 1 +
> > >> >> > ld/testsuite/ld-dynamic/foo.list | 1 +
> > >> >> > ld/testsuite/ld-dynamic/foo.s | 4 +
> > >> >> > ld/testsuite/ld-dynamic/fstar.list | 1 +
> > >> >> > ld/testsuite/ld-elf/dlempty.list | 3 +
> > >> >> > ld/testsuite/ld-elf/shared.exp | 36 +++++++++
> > >> >> > 21 files changed, 258 insertions(+), 9 deletions(-)
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/export-dynamic-symbol-1.d
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/export-dynamic-symbol-2.d
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/export-dynamic-symbol-glob.d
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/export-dynamic-symbol-list-1.d
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/export-dynamic-symbol-list-2.d
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/export-dynamic-symbol-list-glob.d
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/export-dynamic-symbol.exp
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/export-dynamic-symbol.s
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/foo-bar.list
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/foo.list
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/foo.s
> > >> >> > create mode 100644 ld/testsuite/ld-dynamic/fstar.list
> > >> >> > create mode 100644 ld/testsuite/ld-elf/dlempty.list
> > >> >> >
> > >> >> >diff --git a/ld/NEWS b/ld/NEWS
> > >> >> >index 9f5bbe51cf..870c480bde 100644
> > >> >> >--- a/ld/NEWS
> > >> >> >+++ b/ld/NEWS
> > >> >> >@@ -1,5 +1,8 @@
> > >> >> > -*- text -*-
> > >> >> >
> > >> >> >+* Add ELF linker command-line options, --export-dynamic-symbol and
> > >> >> >+ --export-dynamic-symbol-list, to make symbols dynamic.
> > >> >> >+
> > >> >> > * Add command-line options --enable-non-contiguous-regions and
> > >> >> > --enable-non-contiguous-regions-warnings.
> > >> >> >
> > >> >> >diff --git a/ld/ld.texi b/ld/ld.texi
> > >> >> >index 4dc78e65fa..92e47c6324 100644
> > >> >> >--- a/ld/ld.texi
> > >> >> >+++ b/ld/ld.texi
> > >> >> >@@ -569,6 +569,24 @@ Note that this option is specific to ELF targeted ports. PE targets
> > >> >> > support a similar function to export all symbols from a DLL or EXE; see
> > >> >> > the description of @samp{--export-all-symbols} below.
> > >> >> >
> > >> >> >+@kindex --export-dynamic-symbol=@var{glob}
> > >> >> >+@cindex export dynamic symbol
> > >> >> >+@item --export-dynamic-symbol=@var{glob}
> > >> >> >+When creating a dynamically linked executable, symbols matching
> > >> >> >+@var{glob} will be added to the dynamic symbol table. When creating a
> > >> >> >+shared library, references to symbols matching @var{glob} will not be
> > >> >> >+bound to the definitions within the shared library. This option is a
> > >> >> >+no-op when creating a shared library and @samp{-Bsymbolic} or
> > >> >> >+@samp{--dynamic-list} are not specified. This option is only meaningful
> > >> >> >+on ELF platforms which support shared libraries.
> > >> >>
> > >> >> Is --export-dynamic-symbol still effective for -shared?
> > >> >> I think either way is ok.
> > >> >
> > >> >Yes.
> > >> >
> > >> >> >+@kindex --export-dynamic-symbol-list=@var{file}
> > >> >> >+@cindex export dynamic symbol list
> > >> >> >+@item --export-dynamic-symbol-list=@var{file}
> > >> >> >+Specify a @samp{--export-dynamic-symbol} for each pattern in the file.
> > >> >> >+The format of the file is the same as the version node without
> > >> >> >+scope and node name. See @ref{VERSION} for more information.
> > >> >> >+
> > >> >> > @ifclear SingleFormat
> > >> >> > @cindex big-endian objects
> > >> >> > @cindex endianness
> > >> >> >diff --git a/ld/ldgram.y b/ld/ldgram.y
> > >> >> >index df5c035c03..36845c4c30 100644
> > >> >> >--- a/ld/ldgram.y
> > >> >> >+++ b/ld/ldgram.y
> > >> >> >@@ -1313,7 +1313,7 @@ dynamic_list_node:
> > >> >> > dynamic_list_tag:
> > >> >> > vers_defns ';'
> > >> >> > {
> > >> >> >- lang_append_dynamic_list ($1);
> > >> >> >+ lang_append_dynamic_list (current_dynamic_list_p, $1);
> > >> >> > }
> > >> >> > ;
> > >> >> >
> > >> >> >diff --git a/ld/ldlang.c b/ld/ldlang.c
> > >> >> >index 3d653d460d..14a6a577d2 100644
> > >> >> >--- a/ld/ldlang.c
> > >> >> >+++ b/ld/ldlang.c
> > >> >> >@@ -118,6 +118,7 @@ lang_statement_list_type file_chain = { NULL, NULL };
> > >> >> > lang_statement_union). */
> > >> >> > lang_statement_list_type input_file_chain;
> > >> >> > static const char *current_input_file;
> > >> >> >+struct bfd_elf_dynamic_list **current_dynamic_list_p;
> > >> >> > struct bfd_sym_chain entry_symbol = { NULL, NULL };
> > >> >> > const char *entry_section = ".text";
> > >> >> > struct lang_input_statement_flags input_flags;
> > >> >> >@@ -9324,15 +9325,16 @@ lang_add_unique (const char *name)
> > >> >> > /* Append the list of dynamic symbols to the existing one. */
> > >> >> >
> > >> >> > void
> > >> >> >-lang_append_dynamic_list (struct bfd_elf_version_expr *dynamic)
> > >> >> >+lang_append_dynamic_list (struct bfd_elf_dynamic_list **list_p,
> > >> >> >+ struct bfd_elf_version_expr *dynamic)
> > >> >> > {
> > >> >> >- if (link_info.dynamic_list)
> > >> >> >+ if (*list_p)
> > >> >> > {
> > >> >> > struct bfd_elf_version_expr *tail;
> > >> >> > for (tail = dynamic; tail->next != NULL; tail = tail->next)
> > >> >> > ;
> > >> >> >- tail->next = link_info.dynamic_list->head.list;
> > >> >> >- link_info.dynamic_list->head.list = dynamic;
> > >> >> >+ tail->next = (*list_p)->head.list;
> > >> >> >+ (*list_p)->head.list = dynamic;
> > >> >> > }
> > >> >> > else
> > >> >> > {
> > >> >> >@@ -9341,7 +9343,7 @@ lang_append_dynamic_list (struct bfd_elf_version_expr *dynamic)
> > >> >> > d = (struct bfd_elf_dynamic_list *) xcalloc (1, sizeof *d);
> > >> >> > d->head.list = dynamic;
> > >> >> > d->match = lang_vers_match;
> > >> >> >- link_info.dynamic_list = d;
> > >> >> >+ *list_p = d;
> > >> >> > }
> > >> >> > }
> > >> >> >
> > >> >> >@@ -9363,7 +9365,7 @@ lang_append_dynamic_list_cpp_typeinfo (void)
> > >> >> > dynamic = lang_new_vers_pattern (dynamic, symbols [i], "C++",
> > >> >> > FALSE);
> > >> >> >
> > >> >> >- lang_append_dynamic_list (dynamic);
> > >> >> >+ lang_append_dynamic_list (&link_info.dynamic_list, dynamic);
> > >> >> > }
> > >> >> >
> > >> >> > /* Append the list of C++ operator new and delete dynamic symbols to the
> > >> >> >@@ -9384,7 +9386,7 @@ lang_append_dynamic_list_cpp_new (void)
> > >> >> > dynamic = lang_new_vers_pattern (dynamic, symbols [i], "C++",
> > >> >> > FALSE);
> > >> >> >
> > >> >> >- lang_append_dynamic_list (dynamic);
> > >> >> >+ lang_append_dynamic_list (&link_info.dynamic_list, dynamic);
> > >> >> > }
> > >> >> >
> > >> >> > /* Scan a space and/or comma separated string of features. */
> > >> >> >diff --git a/ld/ldlang.h b/ld/ldlang.h
> > >> >> >index 3018c3e2ba..529ccd1585 100644
> > >> >> >--- a/ld/ldlang.h
> > >> >> >+++ b/ld/ldlang.h
> > >> >> >@@ -513,6 +513,8 @@ extern bfd_boolean entry_from_cmdline;
> > >> >> > extern lang_statement_list_type file_chain;
> > >> >> > extern lang_statement_list_type input_file_chain;
> > >> >> >
> > >> >> >+extern struct bfd_elf_dynamic_list **current_dynamic_list_p;
> > >> >> >+
> > >> >> > extern int lang_statement_iteration;
> > >> >> > extern struct asneeded_minfo **asneeded_list_tail;
> > >> >> >
> > >> >> >@@ -673,7 +675,8 @@ extern struct bfd_elf_version_deps *lang_add_vers_depend
> > >> >> > (struct bfd_elf_version_deps *, const char *);
> > >> >> > extern void lang_register_vers_node
> > >> >> > (const char *, struct bfd_elf_version_tree *, struct bfd_elf_version_deps *);
> > >> >> >-extern void lang_append_dynamic_list (struct bfd_elf_version_expr *);
> > >> >> >+extern void lang_append_dynamic_list (struct bfd_elf_dynamic_list **,
> > >> >> >+ struct bfd_elf_version_expr *);
> > >> >> > extern void lang_append_dynamic_list_cpp_typeinfo (void);
> > >> >> > extern void lang_append_dynamic_list_cpp_new (void);
> > >> >> > extern void lang_add_unique
> > >> >> >diff --git a/ld/ldlex.h b/ld/ldlex.h
> > >> >> >index 22b928d2d9..2c8d043a09 100644
> > >> >> >--- a/ld/ldlex.h
> > >> >> >+++ b/ld/ldlex.h
> > >> >> >@@ -81,6 +81,8 @@ enum option_values
> > >> >> > OPTION_DYNAMIC_LIST_CPP_NEW,
> > >> >> > OPTION_DYNAMIC_LIST_CPP_TYPEINFO,
> > >> >> > OPTION_DYNAMIC_LIST_DATA,
> > >> >> >+ OPTION_EXPORT_DYNAMIC_SYMBOL,
> > >> >> >+ OPTION_EXPORT_DYNAMIC_SYMBOL_LIST,
> > >> >> > OPTION_WARN_COMMON,
> > >> >> > OPTION_WARN_CONSTRUCTORS,
> > >> >> > OPTION_WARN_FATAL,
> > >> >> >diff --git a/ld/lexsup.c b/ld/lexsup.c
> > >> >> >index fe9526b527..2bac1631d6 100644
> > >> >> >--- a/ld/lexsup.c
> > >> >> >+++ b/ld/lexsup.c
> > >> >> >@@ -504,6 +504,10 @@ static const struct ld_option ld_options[] =
> > >> >> > '\0', NULL, N_("Use C++ typeinfo dynamic list"), TWO_DASHES },
> > >> >> > { {"dynamic-list", required_argument, NULL, OPTION_DYNAMIC_LIST},
> > >> >> > '\0', N_("FILE"), N_("Read dynamic list"), TWO_DASHES },
> > >> >> >+ { {"export-dynamic-symbol", required_argument, NULL, OPTION_EXPORT_DYNAMIC_SYMBOL},
> > >> >> >+ '\0', N_("SYMBOL"), N_("Export the specified symbol"), EXACTLY_TWO_DASHES },
> > >> >> >+ { {"export-dynamic-symbol-list", required_argument, NULL, OPTION_EXPORT_DYNAMIC_SYMBOL_LIST},
> > >> >> >+ '\0', N_("FILE"), N_("Read export dynamic symbol list"), EXACTLY_TWO_DASHES },
> > >> >> > { {"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
> > >> >> > '\0', NULL, N_("Warn about duplicate common symbols"), TWO_DASHES },
> > >> >> > { {"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
> > >> >> >@@ -581,6 +585,7 @@ parse_args (unsigned argc, char **argv)
> > >> >> > dynamic_list_data,
> > >> >> > dynamic_list
> > >> >> > } opt_dynamic_list = dynamic_list_unset;
> > >> >> >+ struct bfd_elf_dynamic_list *export_list = NULL;
> > >> >> >
> > >> >> > shortopts = (char *) xmalloc (OPTION_COUNT * 3 + 2);
> > >> >> > longopts = (struct option *)
> > >> >> >@@ -1418,6 +1423,7 @@ parse_args (unsigned argc, char **argv)
> > >> >> > ldfile_open_command_file (optarg);
> > >> >> > saved_script_handle = hold_script_handle;
> > >> >> > parser_input = input_dynamic_list;
> > >> >> >+ current_dynamic_list_p = &link_info.dynamic_list;
> > >> >> > yyparse ();
> > >> >> > }
> > >> >> > if (opt_dynamic_list != dynamic_list_data)
> > >> >> >@@ -1425,6 +1431,29 @@ parse_args (unsigned argc, char **argv)
> > >> >> > if (opt_symbolic == symbolic)
> > >> >> > opt_symbolic = symbolic_unset;
> > >> >> > break;
> > >> >> >+ case OPTION_EXPORT_DYNAMIC_SYMBOL:
> > >> >> >+ {
> > >> >> >+ struct bfd_elf_version_expr *expr
> > >> >> >+ = lang_new_vers_pattern (NULL, xstrdup (optarg), NULL,
> > >> >> >+ FALSE);
> > >> >> >+ lang_append_dynamic_list (&export_list, expr);
> > >> >> >+ }
> > >> >> >+ break;
> > >> >> >+ case OPTION_EXPORT_DYNAMIC_SYMBOL_LIST:
> > >> >> >+ /* This option indicates a small script that only specifies
> > >> >> >+ an export list. Read it, but don't assume that we've
> > >> >> >+ seen a linker script. */
> > >> >> >+ {
> > >> >> >+ FILE *hold_script_handle;
> > >> >> >+
> > >> >> >+ hold_script_handle = saved_script_handle;
> > >> >> >+ ldfile_open_command_file (optarg);
> > >> >> >+ saved_script_handle = hold_script_handle;
> > >> >> >+ parser_input = input_dynamic_list;
> > >> >> >+ current_dynamic_list_p = &export_list;
> > >> >> >+ yyparse ();
> > >> >> >+ }
> > >> >> >+ break;
> > >> >> > case OPTION_WARN_COMMON:
> > >> >> > config.warn_common = TRUE;
> > >> >> > break;
> > >> >> >@@ -1632,6 +1661,52 @@ parse_args (unsigned argc, char **argv)
> > >> >> > && command_line.check_section_addresses < 0)
> > >> >> > command_line.check_section_addresses = 0;
> > >> >> >
> > >> >> >+ if (export_list && !bfd_link_relocatable (&link_info))
> > >> >> >+ {
> > >> >> >+ struct bfd_elf_version_expr *head = export_list->head.list;
> > >> >> >+ struct bfd_elf_version_expr *next;
> > >> >> >+
> > >> >> >+ /* For --export-dynamic-symbol[-list]:
> > >> >> >+ 1. When building executable, treat like --dynamic-list.
> > >> >> >+ 2. When building shared object:
> > >> >> >+ a. If -Bsymbolic or --dynamic-list are used, treat like
> > >> >> >+ --dynamic-list.
> > >> >> >+ b. Otherwise, ignored.
> > >> >> >+ */
> > >> >> >+ bfd_boolean kept = (bfd_link_executable (&link_info)
> > >> >> >+ || opt_symbolic != symbolic_unset
> > >> >> >+ || opt_dynamic_list != dynamic_list_unset);
> > >> >> >+
> > >> >> >+ if (kept)
> > >> >> >+ {
> > >> >> >+ /* Append the export list to link_info.dynamic_list. */
> > >> >> >+ if (link_info.dynamic_list)
> > >> >> >+ {
> > >> >> >+ for (next = head; next->next != NULL; next = next->next)
> > >> >> >+ ;
> > >> >> >+ next->next = link_info.dynamic_list->head.list;
> > >> >> >+ link_info.dynamic_list->head.list = head;
> > >> >> >+ }
> > >> >> >+ else
> > >> >> >+ link_info.dynamic_list = export_list;
> > >> >> >+
> > >> >> >+ if (opt_dynamic_list != dynamic_list_data)
> > >> >> >+ opt_dynamic_list = dynamic_list;
> > >> >> >+ if (opt_symbolic == symbolic)
> > >> >> >+ opt_symbolic = symbolic_unset;
> > >> >>
> > >> >> The interaction with -Bsymbolic appears to be more complex now.
> > >> >> I think users will pretty much avoid the combination of -Bsymbolic and
> > >> >> (--dynamic-list or --export-dynamic-symbol or --export-dynamic-symbol-list).
> > >> >>
> > >> >> So I beg for a re-consideration of
> > >> >> https://sourceware.org/bugzilla/show_bug.cgi?id=26018
> > >> >> https://sourceware.org/pipermail/binutils/2020-May/111223.html
> > >> >>
> > >> >
> > >> >Here is the updated patch on top of
> > >> >
> > >> >https://sourceware.org/pipermail/binutils/2020-May/111228.html
> > >>
> > >> Thanks for PATCH v3. LGTM.
> > >>
> > >> I have verified the semantics of new tests dl2d ~ dl2k.
> > >
> > >The updated patch to adjust ld-dynamic/export-dynamic-symbol.s
> > >for all ELF targets:
> > >
> > >diff --git a/ld/testsuite/ld-dynamic/export-dynamic-symbol.s
> > >b/ld/testsuite/ld-dynamic/export-dynamic-symbol.s
> > >index 4b1b8ebd5c..c55da536c5 100644
> > >--- a/ld/testsuite/ld-dynamic/export-dynamic-symbol.s
> > >+++ b/ld/testsuite/ld-dynamic/export-dynamic-symbol.s
> > >@@ -1,6 +1,14 @@
> > > .text
> > >+ .global start /* Used by SH targets. */
> > >+start:
> > > .global _start
> > > _start:
> > >+ .global __start
> > >+__start:
> > >+ .global main /* Used by HPPA targets. */
> > >+main:
> > >+ .globl _main /* Used by LynxOS targets. */
> > >+_main:
> > > .word 0
> > >
> > > .section .text.1, "ax"
> > >
> > >--
> > >H.J.
> >
> > Still looks good.
>
> More changes are needed:
> diff --git a/ld/testsuite/ld-dynamic/export-dynamic-symbol.exp
> b/ld/testsuite/ld-dynamic/export-dynamic-symbol.exp
> index d0b4bc4eb0..c879a5f65f 100644
> --- a/ld/testsuite/ld-dynamic/export-dynamic-symbol.exp
> +++ b/ld/testsuite/ld-dynamic/export-dynamic-symbol.exp
> @@ -23,6 +23,26 @@ if ![is_elf_format] {
> return
> }
>
> +# Skip targets where -shared is not supported
> +
> +if ![check_shared_lib_support] {
> + return
> +}
> +
> +set old_ASFLAGS $ASFLAGS
> +
> +# These targets require extra GAS options when building code for shared
> +# libraries.
> +if [istarget "nds32*-*"] {
> + append ASFLAGS " -mpic"
> +}
> +if [istarget "tic6x-*-*"] {
> + append ASFLAGS " -mpic -mpid=near"
> +}
> +if [istarget "sparc*-*-*"] {
> + append ASFLAGS " -K PIC -Av9"
> +}
> +
> set build_tests {
> {"Build libfoo.a"
> "" "" ""
> @@ -37,3 +57,5 @@ foreach test_file $test_list {
> verbose $test_name
> run_dump_test $test_name
> }
> +
> +set ASFLAGS $old_ASFLAGS
>
More test fixes. libfoo.a is a bad name since it may have a conflict
with other tests.
--
H.J.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-ld-Add-export-dynamic-symbol-and-export-dynamic-symb.patch
Type: text/x-patch
Size: 23650 bytes
Desc: not available
URL: <https://sourceware.org/pipermail/binutils/attachments/20200527/215780a6/attachment-0001.bin>
More information about the Binutils
mailing list