[binutils-gdb] ld: Support the -exclude-symbols option via COFF def files, with the EXCLUDE_SYMBOLS keyword

[Martin Storsjo <mstorsjo@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=61f6b650f9bb7fd276b45427b9202f3263465376

commit 61f6b650f9bb7fd276b45427b9202f3263465376
Author: Martin Storsjö <martin@martin.st>
Date:   Sat Jul 23 00:57:19 2022 +0300

    ld: Support the -exclude-symbols option via COFF def files, with the EXCLUDE_SYMBOLS keyword
    
    This was requested in review.

Diff:
---
 ld/deffile.h                                    |  2 ++
 ld/deffilep.y                                   |  3 +++
 ld/testsuite/ld-pe/exclude-symbols-def-i386.d   | 10 ++++++++++
 ld/testsuite/ld-pe/exclude-symbols-def-i386.s   | 11 +++++++++++
 ld/testsuite/ld-pe/exclude-symbols-def-x86_64.d | 10 ++++++++++
 ld/testsuite/ld-pe/exclude-symbols-def-x86_64.s | 11 +++++++++++
 ld/testsuite/ld-pe/exclude-symbols-def.def      |  4 ++++
 ld/testsuite/ld-pe/pe.exp                       |  2 ++
 8 files changed, 53 insertions(+)

diff --git a/ld/deffile.h b/ld/deffile.h
index 306ae3a6f75..a247639628e 100644
--- a/ld/deffile.h
+++ b/ld/deffile.h
@@ -99,6 +99,8 @@ typedef struct def_file {
 
   /* Only expected from .drectve sections, not .DEF files.  */
   def_file_aligncomm *aligncomms;
+
+  /* From EXCLUDE_SYMBOLS or embedded directives. */
   def_file_exclude_symbol *exclude_symbols;
 
 } def_file;
diff --git a/ld/deffilep.y b/ld/deffilep.y
index dc0cb4db944..27db336e0f5 100644
--- a/ld/deffilep.y
+++ b/ld/deffilep.y
@@ -249,6 +249,7 @@ keyword_as_name: BASE { $$ = "BASE"; }
 	 | DATAL { $$ = "data"; }
 	 | DESCRIPTION { $$ = "DESCRIPTION"; }
 	 | DIRECTIVE { $$ = "DIRECTIVE"; }
+	 | EXCLUDE_SYMBOLS { $$ = "EXCLUDE_SYMBOLS"; }
 	 | EXECUTE { $$ = "EXECUTE"; }
 	 | EXPORTS { $$ = "EXPORTS"; }
 	 | HEAPSIZE { $$ = "HEAPSIZE"; }
@@ -337,6 +338,7 @@ anylang_id: ID		{ $$ = $1; }
 
 symbol_list:
 	anylang_id { def_exclude_symbols ($1); }
+	|	symbol_list anylang_id { def_exclude_symbols ($2); }
 	|	symbol_list ',' anylang_id { def_exclude_symbols ($3); }
 	;
 
@@ -1352,6 +1354,7 @@ tokens[] =
   { "data", DATAL },
   { "DESCRIPTION", DESCRIPTION },
   { "DIRECTIVE", DIRECTIVE },
+  { "EXCLUDE_SYMBOLS", EXCLUDE_SYMBOLS },
   { "EXECUTE", EXECUTE },
   { "EXPORTS", EXPORTS },
   { "HEAPSIZE", HEAPSIZE },
diff --git a/ld/testsuite/ld-pe/exclude-symbols-def-i386.d b/ld/testsuite/ld-pe/exclude-symbols-def-i386.d
new file mode 100644
index 00000000000..1f15c893447
--- /dev/null
+++ b/ld/testsuite/ld-pe/exclude-symbols-def-i386.d
@@ -0,0 +1,10 @@
+#source: exclude-symbols-def-i386.s
+#target: i?86-*-cygwin* i?86-*-pe i?86-*-mingw*
+#ld: -shared ${srcdir}/${subdir}/exclude-symbols-def.def
+#objdump: -p
+
+#...
+.*\[[ 	]*0\] sym1
+.*\[[ 	]*1\] sym3
+.*\[[ 	]*2\] sym5
+#pass
diff --git a/ld/testsuite/ld-pe/exclude-symbols-def-i386.s b/ld/testsuite/ld-pe/exclude-symbols-def-i386.s
new file mode 100644
index 00000000000..fd533bb44c9
--- /dev/null
+++ b/ld/testsuite/ld-pe/exclude-symbols-def-i386.s
@@ -0,0 +1,11 @@
+.global _sym1
+.global _sym2
+.global _sym3
+.global _sym4
+.global _sym5
+_sym1:
+_sym2:
+_sym3:
+_sym4:
+_sym5:
+  ret
diff --git a/ld/testsuite/ld-pe/exclude-symbols-def-x86_64.d b/ld/testsuite/ld-pe/exclude-symbols-def-x86_64.d
new file mode 100644
index 00000000000..39de8813dc5
--- /dev/null
+++ b/ld/testsuite/ld-pe/exclude-symbols-def-x86_64.d
@@ -0,0 +1,10 @@
+#source: exclude-symbols-def-x86_64.s
+#target: x86_64-*-cygwin* x86_64-*-pe x86_64-*-mingw*
+#ld: -shared ${srcdir}/${subdir}/exclude-symbols-def.def
+#objdump: -p
+
+#...
+.*\[[ 	]*0\] sym1
+.*\[[ 	]*1\] sym3
+.*\[[ 	]*2\] sym5
+#pass
diff --git a/ld/testsuite/ld-pe/exclude-symbols-def-x86_64.s b/ld/testsuite/ld-pe/exclude-symbols-def-x86_64.s
new file mode 100644
index 00000000000..2889de1c160
--- /dev/null
+++ b/ld/testsuite/ld-pe/exclude-symbols-def-x86_64.s
@@ -0,0 +1,11 @@
+.global sym1
+.global sym2
+.global sym3
+.global sym4
+.global sym5
+sym1:
+sym2:
+sym3:
+sym4:
+sym5:
+  ret
diff --git a/ld/testsuite/ld-pe/exclude-symbols-def.def b/ld/testsuite/ld-pe/exclude-symbols-def.def
new file mode 100644
index 00000000000..c0cee7b1e70
--- /dev/null
+++ b/ld/testsuite/ld-pe/exclude-symbols-def.def
@@ -0,0 +1,4 @@
+LIBRARY exclude-symbols-def.dll
+EXCLUDE_SYMBOLS
+sym2
+sym4
diff --git a/ld/testsuite/ld-pe/pe.exp b/ld/testsuite/ld-pe/pe.exp
index b640b0891f2..22819e0894f 100644
--- a/ld/testsuite/ld-pe/pe.exp
+++ b/ld/testsuite/ld-pe/pe.exp
@@ -127,3 +127,5 @@ run_ld_link_tests $foreign_sym_test
 
 run_dump_test "exclude-symbols-embedded-i386"
 run_dump_test "exclude-symbols-embedded-x86_64"
+run_dump_test "exclude-symbols-def-i386"
+run_dump_test "exclude-symbols-def-x86_64"