Move default crt objects into Toolchain
Move the crt objects spread around cc/library.go and cc/binary.go
into the Toolchain. This will simplify adding new toolchains that
have custom crt objects.
Test: m checkbuild
Test: go test ./cc/...
Change-Id: I7fdc1f53769799cb9c10e3e5816dabee0f918768
diff --git a/cc/config/arm64_linux_host.go b/cc/config/arm64_linux_host.go
index 59c52d1..83bd799 100644
--- a/cc/config/arm64_linux_host.go
+++ b/cc/config/arm64_linux_host.go
@@ -45,6 +45,16 @@
"-Wl,--hash-style=gnu",
"-Wl,--no-undefined-version",
})
+
+ // Embed the linker into host bionic binaries. This is needed to support host bionic,
+ // as the linux kernel requires that the ELF interpreter referenced by PT_INTERP be
+ // either an absolute path, or relative from CWD. To work around this, we extract
+ // the load sections from the runtime linker ELF binary and embed them into each host
+ // bionic binary, omitting the PT_INTERP declaration. The kernel will treat it as a static
+ // binary, and then we use a special entry point to fix up the arguments passed by
+ // the kernel before jumping to the embedded linker.
+ linuxArm64CrtBeginSharedBinary = append(android.CopyOf(bionicCrtBeginSharedBinary),
+ "host_bionic_linker_script")
)
func init() {
@@ -68,6 +78,10 @@
return "${config.Arm64ClangCflags} ${config.LinuxBionicArm64Cflags}"
}
+func (toolchainLinuxArm64) CrtBeginSharedBinary() []string {
+ return linuxArm64CrtBeginSharedBinary
+}
+
func linuxArm64ToolchainFactory(arch android.Arch) Toolchain {
archVariant := "armv8-a" // for host, default to armv8-a
toolchainClangCflags := []string{arm64ClangArchVariantCflagsVar[archVariant]}
diff --git a/cc/config/bionic.go b/cc/config/bionic.go
index 0258408..e87f571 100644
--- a/cc/config/bionic.go
+++ b/cc/config/bionic.go
@@ -19,8 +19,19 @@
var (
bionicDefaultSharedLibraries = []string{"libc", "libm", "libdl"}
+
+ bionicCrtBeginStaticBinary, bionicCrtEndStaticBinary = []string{"crtbegin_static"}, []string{"crtend_android"}
+ bionicCrtBeginSharedBinary, bionicCrtEndSharedBinary = []string{"crtbegin_dynamic"}, []string{"crtend_android"}
+ bionicCrtBeginSharedLibrary, bionicCrtEndSharedLibrary = []string{"crtbegin_so"}, []string{"crtend_so"}
)
func (toolchainBionic) Bionic() bool { return true }
func (toolchainBionic) DefaultSharedLibraries() []string { return bionicDefaultSharedLibraries }
+
+func (toolchainBionic) CrtBeginStaticBinary() []string { return bionicCrtBeginStaticBinary }
+func (toolchainBionic) CrtBeginSharedBinary() []string { return bionicCrtBeginSharedBinary }
+func (toolchainBionic) CrtBeginSharedLibrary() []string { return bionicCrtBeginSharedLibrary }
+func (toolchainBionic) CrtEndStaticBinary() []string { return bionicCrtEndStaticBinary }
+func (toolchainBionic) CrtEndSharedBinary() []string { return bionicCrtEndSharedBinary }
+func (toolchainBionic) CrtEndSharedLibrary() []string { return bionicCrtEndSharedLibrary }
diff --git a/cc/config/toolchain.go b/cc/config/toolchain.go
index dfb2439..ab09751 100644
--- a/cc/config/toolchain.go
+++ b/cc/config/toolchain.go
@@ -106,6 +106,13 @@
AvailableLibraries() []string
+ CrtBeginStaticBinary() []string
+ CrtBeginSharedBinary() []string
+ CrtBeginSharedLibrary() []string
+ CrtEndStaticBinary() []string
+ CrtEndSharedBinary() []string
+ CrtEndSharedLibrary() []string
+
// DefaultSharedLibraries returns the list of shared libraries that will be added to all
// targets unless they explicitly specify system_shared_libs.
DefaultSharedLibraries() []string
@@ -172,6 +179,13 @@
return nil
}
+func (toolchainBase) CrtBeginStaticBinary() []string { return nil }
+func (toolchainBase) CrtBeginSharedBinary() []string { return nil }
+func (toolchainBase) CrtBeginSharedLibrary() []string { return nil }
+func (toolchainBase) CrtEndStaticBinary() []string { return nil }
+func (toolchainBase) CrtEndSharedBinary() []string { return nil }
+func (toolchainBase) CrtEndSharedLibrary() []string { return nil }
+
func (toolchainBase) DefaultSharedLibraries() []string {
return nil
}
diff --git a/cc/config/x86_linux_bionic_host.go b/cc/config/x86_linux_bionic_host.go
index e7133c9..e7e5f2d 100644
--- a/cc/config/x86_linux_bionic_host.go
+++ b/cc/config/x86_linux_bionic_host.go
@@ -63,6 +63,16 @@
})
linuxBionicLldflags = ClangFilterUnknownLldflags(linuxBionicLdflags)
+
+ // Embed the linker into host bionic binaries. This is needed to support host bionic,
+ // as the linux kernel requires that the ELF interpreter referenced by PT_INTERP be
+ // either an absolute path, or relative from CWD. To work around this, we extract
+ // the load sections from the runtime linker ELF binary and embed them into each host
+ // bionic binary, omitting the PT_INTERP declaration. The kernel will treat it as a static
+ // binary, and then we use a special entry point to fix up the arguments passed by
+ // the kernel before jumping to the embedded linker.
+ linuxBionicCrtBeginSharedBinary = append(android.CopyOf(bionicCrtBeginSharedBinary),
+ "host_bionic_linker_script")
)
func init() {
@@ -138,6 +148,10 @@
return "x86_64"
}
+func (toolchainLinuxBionic) CrtBeginSharedBinary() []string {
+ return linuxBionicCrtBeginSharedBinary
+}
+
var toolchainLinuxBionicSingleton Toolchain = &toolchainLinuxBionic{}
func linuxBionicToolchainFactory(arch android.Arch) Toolchain {