Add linker scripts for embedded linker to sysroot am: 44afa7507e am: d8942347a7
Original change: https://android-review.googlesource.com/c/platform/external/musl/+/1987170
Change-Id: I7cf644a9adfbeceab58dc42b0ed70f80f708939f
diff --git a/Android.bp b/Android.bp
index 2c7c6bb..19c46fe 100644
--- a/Android.bp
+++ b/Android.bp
@@ -615,6 +615,23 @@
],
}
+// The linker and trampoline compiled as a .o file to use as part of the sysroot
+// crt.
+cc_object {
+ name: "libc_musl_linker_object",
+ defaults: ["libc_musl_defaults"],
+ srcs: [
+ ":musl_linker_asm",
+ "android/ldso_trampoline.cpp",
+ ],
+ cflags: [
+ // These are required to make sure the C code in ldso_trampoline.c
+ // doesn't have any dependencies on libc.
+ "-fno-stack-protector",
+ "-ftrivial-auto-var-init=uninitialized",
+ ],
+}
+
// The architecture-specific bits have to be handled separately because the label varies based
// on architecture, which prevents using $(locations) to find them and requires using $(in)
// instead, which would mix in all the other files if this were part of the main libc_musl_sysroot
@@ -696,11 +713,8 @@
":libc_musl_rcrt1",
":libc_musl_Scrt1",
- // Embedded linker objects
- ":libc_musl_crtbegin_dynamic",
- ":libc_musl_crtbegin_static",
- ":libc_musl_crtbegin_so",
- ":libc_musl_crtend",
+ // Embedded linker objects and linker scripts
+ ":libc_musl_linker_object",
":musl_linker_script",
// Wrapper scripts
@@ -719,6 +733,9 @@
cmd: "includes=($(locations include/**/*.h)) && " +
"bits=($(locations arch/generic/bits/*.h)) && " +
"android_bits=($(locations android/include/bits/*.h)) && " +
+ "ln -s libc_musl.so $(genDir)/ld-musl.so.1 && " +
+ "echo -e 'GROUP ( Scrt1-real.o libc_musl_linker_object.o )\nINCLUDE linker.script' > $(genDir)/Scrt1.ld && " +
+ "echo -e 'GROUP ( libc_musl.so )' > $(genDir)/libc.so && " +
"$(location soong_zip) -o $(genDir)/sysroot.zip " +
" -j " +
" -f $(location LICENSE) " +
@@ -740,13 +757,13 @@
" -f $(location :libc_musl_crtn) " +
" -f $(location :libc_musl_crt1) " +
" -f $(location :libc_musl_rcrt1) " +
- " -f $(location :libc_musl_Scrt1) " +
// embedded linker crt objects
- " -f $(location :libc_musl_crtbegin_dynamic) " +
- " -f $(location :libc_musl_crtbegin_static) " +
- " -f $(location :libc_musl_crtbegin_so) " +
- " -f $(location :libc_musl_crtend) " +
" -f $(location :musl_linker_script) " +
+ " -f $(location :libc_musl_linker_object) " +
+ // libs
+ " -f $(location :libc_musl) " +
+ " -f $(genDir)/ld-musl.so.1 " +
+ " -f $(genDir)/libc.so " +
// clang wrappers
" -P bin -j " +
" -f $(location :libc_musl_clang_wrapper) " +
@@ -755,17 +772,17 @@
// libs in a separate zip so they can be renamed
"$(location soong_zip) -o $(genDir)/libs.zip " +
" -P lib -j " +
- " -f $(location :libc_musl) " +
- " -f $(location :libc_musl_for_sysroot) " +
" -f $(location :libc_musl_static) " +
" -f $(location :libc_musl_sysroot_static_empty) " +
+ " -f $(genDir)/Scrt1.ld " +
+ " -f $(location :libc_musl_Scrt1) " +
" && " +
"$(location zip2zip) -i $(genDir)/libs.zip -o $(genDir)/libs_renamed.zip " +
// rename libs from module names to desired names in sysroot
" lib/libc_musl_static.a:lib/libc.a " +
- " lib/libc_musl.so:lib/libc_musl.so " +
- " lib/libc_musl_for_sysroot.so:lib/libc.so " +
- " lib/libc_musl_for_sysroot.so:lib/ld-musl.so.1 " +
+ // Swap in linker script for Scrt1.o
+ " lib/Scrt1.o:lib/Scrt1-real.o " +
+ " lib/Scrt1.ld:lib/Scrt1.o " +
// copy empty static libs
" lib/libc_musl_sysroot_static_empty.a:lib/libcrypt.a " +
" lib/libc_musl_sysroot_static_empty.a:lib/libdl.a " +
