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Toolchain: Use crtbeginS and crtendS for shared objects

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Turns out the reason GCC wasn't as smart about startup code for
shared objects as we hoped is because nobody told it to be :D

Change the STARTFILE_SPEC and ENDFILE_SPEC in gcc/config/serenity.h to
skip crt0.o and to link the S variants of crtbegin
and crtend for shared objects.

Because we're using the crtbegin and crtend from libgcc, also tell
libgcc in libgcc/config.host to compile crtbeginS and crtendS from
crtstuff.c.
This commit is contained in:
Andrew Kaster 2020-01-01 14:16:06 -05:00 committed by Andreas Kling
parent 99e06c53e5
commit 2979491512
2 changed files with 10 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
Ports/gcc/patches/gcc.patch
View file

@ -7,7 +7,7 @@ index 75bb6a313..da281fb48 100755
# Copyright 1992-2019 Free Software Foundation, Inc.
-timestamp='2019-01-01'
+timestamp='2019-12-17'
+timestamp='2020-01-01
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
@ -153,11 +153,11 @@ index 000000000..925c88dd6
+/* Files that are linked before user code.
+ The %s tells GCC to look for these files in the library directory. */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
+#define STARTFILE_SPEC "%{!shared:crt0.o%s} crti.o%s %{shared:crtbeginS.o%s; :crtbegin.o%s}"
+
+/* Files that are linked after user code. */
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
+#define ENDFILE_SPEC "%{shared:crtendS.o%s; :crtend.o%s} crtn.o%s"
+
+#undef LINK_SPEC
+#define LINK_SPEC "%{shared:-shared} %{static:-static} %{!shared: %{!static: %{rdynamic:-export-dynamic}}}"
@ -181,11 +181,11 @@ index 91abc84da..659376d14 100644
extra_parts="crt0.o"
;;
+i[34567]86-*-serenity*)
+ extra_parts="$extra_parts crti.o crtbegin.o crtend.o crtn.o"
+ extra_parts="$extra_parts crti.o crtbegin.o crtbeginS.o crtend.o crtendS.o crtn.o"
+ tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
+ ;;
+x86_64-*-serenity*)
+ extra_parts="$extra_parts crti.o crtbegin.o crtend.o crtn.o"
+ extra_parts="$extra_parts crti.o crtbegin.o crtbeginS.o crtend.o crtendS.o crtn.o"
+ tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
+ ;;
+arm-*-serenity*)

10
Toolchain/Patches/gcc.patch
View file

@ -7,7 +7,7 @@ index 75bb6a313..da281fb48 100755
# Copyright 1992-2019 Free Software Foundation, Inc.
-timestamp='2019-01-01'
+timestamp='2019-12-17'
+timestamp='2020-01-01'
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
@ -153,11 +153,11 @@ index 000000000..925c88dd6
+/* Files that are linked before user code.
+ The %s tells GCC to look for these files in the library directory. */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
+#define STARTFILE_SPEC "%{!shared:crt0.o%s} crti.o%s %{shared:crtbeginS.o%s; :crtbegin.o%s}"
+
+/* Files that are linked after user code. */
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
+#define ENDFILE_SPEC "%{shared:crtendS.o%s; :crtend.o%s} crtn.o%s"
+
+#undef LINK_SPEC
+#define LINK_SPEC "%{shared:-shared} %{static:-static} %{!shared: %{!static: %{rdynamic:-export-dynamic}}}"
@ -181,11 +181,11 @@ index 91abc84da..659376d14 100644
extra_parts="crt0.o"
;;
+i[34567]86-*-serenity*)
+ extra_parts="$extra_parts crti.o crtbegin.o crtend.o crtn.o"
+ extra_parts="$extra_parts crti.o crtbegin.o crtbeginS.o crtend.o crtendS.o crtn.o"
+ tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
+ ;;
+x86_64-*-serenity*)
+ extra_parts="$extra_parts crti.o crtbegin.o crtend.o crtn.o"
+ extra_parts="$extra_parts crti.o crtbegin.o crtbeginS.o crtend.o crtendS.o crtn.o"
+ tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
+ ;;
+arm-*-serenity*)