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Cygwin: dllfixdbg: don't overwrite input DLL

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Change dllfixdbg to keep the input DLL intact and just generate
a new DLL matching the debug file.  Fix Makefile rule accordingly.
The result is, cygwin0.dll is the original DLL created with full
debug sections and stays that way throughout the build process.
Only new-cygwin1.dll will become the stripped DLL matching with
the file containing the debug sections cygwin1.dbg.  This is ok,
because commit ba02fef995ac ("Cygwin: Makefile.am: fix DLL build rule")
made new-cygwin1.dll the DLL to be installed.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2022-02-03 16:19:54 +01:00
parent 96646006a7
commit 7ae91f3b56
2 changed files with 10 additions and 11 deletions
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7
winsup/cygwin/Makefile.am
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@ -639,11 +639,8 @@ $(PRE_DLL_NAME): $(LDSCRIPT) dllfixdbg libdll.a $(VERSION_OFILES) $(LIBSERVER)\
$(newlib_build)/libc/libc.a \
-lgcc -lkernel32 -lntdll -Wl,-Map,cygwin.map
$(DBG_DLL_NAME): $(PRE_DLL_NAME)
$(AM_V_GEN)$(srcdir)/dllfixdbg $(OBJDUMP) $(OBJCOPY) $(PRE_DLL_NAME) $(DBG_DLL_NAME)
$(NEW_DLL_NAME): $(PRE_DLL_NAME) $(DBG_DLL_NAME)
$(AM_V_GEN)ln -f $(PRE_DLL_NAME) $@
$(DBG_DLL_NAME) $(NEW_DLL_NAME): $(PRE_DLL_NAME)
$(AM_V_GEN)$(srcdir)/dllfixdbg $(OBJDUMP) $(OBJCOPY) $(PRE_DLL_NAME) $(DBG_DLL_NAME) $(NEW_DLL_NAME)
# cygwin import library
toolopts=--cpu=@target_cpu@ --ar=@AR@ --as=@AS@ --nm=@NM@ --objcopy=@OBJCOPY@

14
winsup/cygwin/dllfixdbg
View File

@ -13,11 +13,13 @@ my $strip = $ARGV[0] eq '-s';
shift if $strip;
my $objdump = shift;
my @objcopy = ((shift));
my $dll = shift;
my $dbg = shift;
xit 0, @objcopy, '-R', '.gnu_debuglink_overlay', '--add-gnu-debuglink=/dev/null', '--only-keep-debug', $dll, $dbg;
xit 0, @objcopy, '-g', '--keep-section=.gnu_debuglink_overlay', '--add-gnu-debuglink=' . $dbg, $dll;
open(OBJDUMP, '-|', "$objdump --headers $dll");
my $pre_dll = shift;
my $dbg_dll = shift;
my $new_dll = shift;
my $verbose = shift;
xit 0, @objcopy, '-R', '.gnu_debuglink_overlay', '--add-gnu-debuglink=/dev/null', '--only-keep-debug', $pre_dll, $dbg_dll;
xit 0, @objcopy, '-g', '--keep-section=.gnu_debuglink_overlay', '--add-gnu-debuglink=' . $dbg_dll, $pre_dll, $new_dll;
open(OBJDUMP, '-|', "$objdump --headers $new_dll");
my %section;
while (<OBJDUMP>) {
my ($idx, $name, $size, $vma, $lma, $fileoff, $algn) = /^\s*(\d+)\s+(\.\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s*$/;
@ -55,7 +57,7 @@ for my $k (sort {$section{$a}{-idx} <=> $section{$b}{-idx}} keys %section) {
}
warn "$0: ERROR final VMA (" . sprintf("0x%08x", $vma) . ") not on 64K boundary\n" if $vma != align($vma, 64 * 1024);
push(@objcopy, $dll, @ARGV);
push(@objcopy, $new_dll, @ARGV);
xit 1, @objcopy;
sub align {
my $n = $_[0];