8dba7fefb0
When libbase is built for an APEX, it uses dlsym to reflectively access
liblog symbols that are added in R. This is because the APEX where
libbasse is packaged into might be running in pre-R devices where the
symbols don't exist in liblog.so.
This however causes a problem for a static executable in an APEX. Since
it is in an APEX, the dlsym is used. But libdl.so which provides dlsym
is not available to static executable. Currently, the dynamic linker is
the only executable in an APEX that all of its dependencies are
statically linked. Fixing the issue by providing fake dlsym by
statically linking to libdl.a.
Exempt-From-Owner-Approval: cherry-pick rvc-dev
Bug: 149569129
Test: m
Merged-In: I2e9e45d9876c2d6c878e541715389e6d1ef56996
(cherry picked from commit ec829ed4ea)
Change-Id: I2e9e45d9876c2d6c878e541715389e6d1ef56996
249 lines
6.2 KiB
Text
249 lines
6.2 KiB
Text
//
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// libdl
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//
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cc_library_static {
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name: "libdl_static",
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defaults: ["linux_bionic_supported"],
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ramdisk_available: true,
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recovery_available: true,
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native_bridge_supported: true,
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srcs: [
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"libdl.cpp",
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"libdl_cfi.cpp",
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],
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cflags: [
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"-Wall",
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"-Wextra",
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"-Wunused",
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"-Werror",
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],
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// For private/CFIShadow.h.
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include_dirs: ["bionic/libc"],
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stl: "none",
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system_shared_libs: [],
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sanitize: {
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never: true,
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},
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apex_available: [
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"//apex_available:platform",
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"com.android.runtime",
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],
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}
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cc_library {
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name: "libdl",
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ramdisk_available: true,
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recovery_available: true,
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native_bridge_supported: true,
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static_ndk_lib: true,
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defaults: ["linux_bionic_supported"],
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// NOTE: --exclude-libs=libgcc.a makes sure that any symbols libdl.so pulls from
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// libgcc.a are made static to libdl.so. This in turn ensures that libraries that
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// a) pull symbols from libgcc.a and b) depend on libdl.so will not rely on libdl.so
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// to provide those symbols, but will instead pull them from libgcc.a. Specifically,
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// we use this property to make sure libc.so has its own copy of the code from
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// libgcc.a it uses.
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//
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// DO NOT REMOVE --exclude-libs!
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ldflags: [
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"-Wl,--exclude-libs=libgcc.a",
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"-Wl,--exclude-libs=libgcc_stripped.a",
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"-Wl,--exclude-libs=libclang_rt.builtins-arm-android.a",
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"-Wl,--exclude-libs=libclang_rt.builtins-aarch64-android.a",
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"-Wl,--exclude-libs=libclang_rt.builtins-x86-android.a",
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"-Wl,--exclude-libs=libclang_rt.builtins-x86_64-android.a",
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],
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// for x86, exclude libgcc_eh.a for the same reasons as above
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arch: {
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arm: {
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version_script: ":libdl.arm.map",
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pack_relocations: false,
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ldflags: ["-Wl,--hash-style=both"],
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},
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arm64: {
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version_script: ":libdl.arm64.map",
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},
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x86: {
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pack_relocations: false,
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ldflags: [
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"-Wl,--exclude-libs=libgcc_eh.a",
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"-Wl,--hash-style=both",
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],
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version_script: ":libdl.x86.map",
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},
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x86_64: {
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ldflags: ["-Wl,--exclude-libs=libgcc_eh.a"],
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version_script: ":libdl.x86_64.map",
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},
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},
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shared: {
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whole_static_libs: ["libdl_static"],
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},
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static: {
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srcs: ["libdl_static.cpp"],
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},
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cflags: [
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"-Wall",
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"-Wextra",
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"-Wunused",
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"-Werror",
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],
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stl: "none",
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nocrt: true,
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system_shared_libs: [],
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// Opt out of native_coverage when opting out of system_shared_libs
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native_coverage: false,
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// This is placeholder library the actual implementation is (currently)
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// provided by the linker.
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shared_libs: ["ld-android"],
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sanitize: {
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never: true,
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},
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stubs: {
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symbol_file: "libdl.map.txt",
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versions: [
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"29",
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"10000",
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],
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},
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apex_available: [
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"//apex_available:platform",
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"com.android.runtime",
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],
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}
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cc_library {
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name: "libdl_android",
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defaults: ["linux_bionic_supported"],
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ramdisk_available: true,
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recovery_available: true,
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native_bridge_supported: true,
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// NOTE: --exclude-libs=libgcc.a makes sure that any symbols libdl.so pulls from
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// libgcc.a are made static to libdl.so. This in turn ensures that libraries that
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// a) pull symbols from libgcc.a and b) depend on libdl.so will not rely on libdl.so
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// to provide those symbols, but will instead pull them from libgcc.a. Specifically,
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// we use this property to make sure libc.so has its own copy of the code from
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// libgcc.a it uses.
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//
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// DO NOT REMOVE --exclude-libs!
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ldflags: [
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"-Wl,--exclude-libs=libgcc.a",
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"-Wl,--exclude-libs=libgcc_stripped.a",
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"-Wl,--exclude-libs=libclang_rt.builtins-arm-android.a",
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"-Wl,--exclude-libs=libclang_rt.builtins-aarch64-android.a",
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"-Wl,--exclude-libs=libclang_rt.builtins-x86-android.a",
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"-Wl,--exclude-libs=libclang_rt.builtins-x86_64-android.a",
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],
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// for x86, exclude libgcc_eh.a for the same reasons as above
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arch: {
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x86: {
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ldflags: [
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"-Wl,--exclude-libs=libgcc_eh.a",
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],
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},
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x86_64: {
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ldflags: ["-Wl,--exclude-libs=libgcc_eh.a"],
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},
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},
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srcs: [ "libdl_android.cpp" ],
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version_script: "libdl_android.map.txt",
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cflags: [
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"-Wall",
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"-Wextra",
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"-Wunused",
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"-Werror",
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],
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stl: "none",
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nocrt: true,
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system_shared_libs: [],
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// Opt out of native_coverage when opting out of system_shared_libs
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native_coverage: false,
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// This is placeholder library the actual implementation is (currently)
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// provided by the linker.
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shared_libs: ["ld-android"],
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sanitize: {
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never: true,
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},
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stubs: {
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symbol_file: "libdl_android.map.txt",
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versions: ["10000"],
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},
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apex_available: [
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"//apex_available:platform",
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"com.android.runtime",
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],
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}
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ndk_library {
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name: "libdl",
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native_bridge_supported: true,
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symbol_file: "libdl.map.txt",
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first_version: "9",
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}
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llndk_library {
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name: "libdl",
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native_bridge_supported: true,
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symbol_file: "libdl.map.txt",
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}
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genrule {
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name: "libdl.arm.map",
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out: ["libdl.arm.map"],
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srcs: ["libdl.map.txt"],
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tool_files: [":bionic-generate-version-script"],
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cmd: "$(location :bionic-generate-version-script) arm $(in) $(out)",
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}
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genrule {
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name: "libdl.arm64.map",
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out: ["libdl.arm64.map"],
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srcs: ["libdl.map.txt"],
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tool_files: [":bionic-generate-version-script"],
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cmd: "$(location :bionic-generate-version-script) arm64 $(in) $(out)",
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}
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genrule {
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name: "libdl.x86.map",
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out: ["libdl.x86.map"],
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srcs: ["libdl.map.txt"],
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tool_files: [":bionic-generate-version-script"],
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cmd: "$(location :bionic-generate-version-script) x86 $(in) $(out)",
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}
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genrule {
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name: "libdl.x86_64.map",
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out: ["libdl.x86_64.map"],
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srcs: ["libdl.map.txt"],
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tool_files: [":bionic-generate-version-script"],
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cmd: "$(location :bionic-generate-version-script) x86_64 $(in) $(out)",
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}
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