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      1 cc_library_static {
      2     name: "liblinker_malloc",
      3     defaults: ["linux_bionic_supported"],
      4 
      5     srcs: [
      6         "linker_allocator.cpp",
      7         "linker_memory.cpp",
      8     ],
      9 
     10     // We need to access Bionic private headers in the linker.
     11     include_dirs: ["bionic/libc"],
     12 }
     13 
     14 cc_binary {
     15     defaults: ["linux_bionic_supported"],
     16     srcs: [
     17         "dlfcn.cpp",
     18         "linker.cpp",
     19         "linker_block_allocator.cpp",
     20         "linker_dlwarning.cpp",
     21         "linker_cfi.cpp",
     22         "linker_config.cpp",
     23         "linker_gdb_support.cpp",
     24         "linker_globals.cpp",
     25         "linker_libc_support.c",
     26         "linker_libcxx_support.cpp",
     27         "linker_main.cpp",
     28         "linker_namespaces.cpp",
     29         "linker_logger.cpp",
     30         "linker_mapped_file_fragment.cpp",
     31         "linker_phdr.cpp",
     32         "linker_sdk_versions.cpp",
     33         "linker_soinfo.cpp",
     34         "linker_utils.cpp",
     35         "rt.cpp",
     36     ],
     37 
     38     arch: {
     39         arm: {
     40             srcs: ["arch/arm/begin.S"],
     41 
     42             cflags: ["-D__work_around_b_24465209__"],
     43         },
     44         arm64: {
     45             srcs: ["arch/arm64/begin.S"],
     46         },
     47         x86: {
     48             srcs: ["arch/x86/begin.c"],
     49 
     50             cflags: ["-D__work_around_b_24465209__"],
     51         },
     52         x86_64: {
     53             srcs: ["arch/x86_64/begin.S"],
     54         },
     55         mips: {
     56             srcs: [
     57                 "arch/mips/begin.S",
     58                 "linker_mips.cpp",
     59             ],
     60         },
     61         mips64: {
     62             srcs: [
     63                 "arch/mips64/begin.S",
     64                 "linker_mips.cpp",
     65             ],
     66         },
     67     },
     68 
     69     // We need to access Bionic private headers in the linker.
     70     include_dirs: ["bionic/libc"],
     71 
     72     // -shared is used to overwrite the -Bstatic and -static
     73     // flags triggered by LOCAL_FORCE_STATIC_EXECUTABLE.
     74     // This dynamic linker is actually a shared object linked with static libraries.
     75     ldflags: [
     76         "-shared",
     77         "-Wl,-Bsymbolic",
     78         "-Wl,--exclude-libs,ALL",
     79     ],
     80 
     81     cflags: [
     82         "-fno-stack-protector",
     83         "-Wstrict-overflow=5",
     84         "-fvisibility=hidden",
     85         "-Wall",
     86         "-Wextra",
     87         "-Wunused",
     88         "-Werror",
     89     ],
     90 
     91     // TODO: split out the asflags.
     92     asflags: [
     93         "-fno-stack-protector",
     94         "-Wstrict-overflow=5",
     95         "-fvisibility=hidden",
     96         "-Wall",
     97         "-Wextra",
     98         "-Wunused",
     99         "-Werror",
    100     ],
    101 
    102     cppflags: ["-Wold-style-cast"],
    103 
    104     // we are going to link libc++_static manually because
    105     // when stl is not set to "none" build system adds libdl
    106     // to the list of static libraries which needs to be
    107     // avoided in the case of building loader.
    108     stl: "none",
    109 
    110     // we don't want crtbegin.o (because we have begin.o), so unset it
    111     // just for this module
    112     nocrt: true,
    113 
    114     static_libs: [
    115         "libc_nomalloc",
    116         "libm",
    117         "libziparchive",
    118         "libutils",
    119         "libbase",
    120         "libz",
    121 
    122         "libdebuggerd_handler_core",
    123         "libdebuggerd_handler_fallback",
    124         "libdebuggerd",
    125         "libbacktrace",
    126         "libunwind",
    127         "liblzma",
    128         "libcutils",
    129 
    130         "liblog",
    131         "libc++_static",
    132 
    133         // Important: The liblinker_malloc should be the last library in the list
    134         // to overwrite any other malloc implementations by other static libraries.
    135         "liblinker_malloc"
    136     ],
    137     static_executable: true,
    138 
    139     name: "linker",
    140     symlinks: ["linker_asan"],
    141     multilib: {
    142         lib64: {
    143             suffix: "64",
    144         },
    145     },
    146     target: {
    147         android: {
    148             static_libs: ["libdebuggerd_client"],
    149         },
    150         android64: {
    151             cflags: ["-DTARGET_IS_64_BIT"],
    152         },
    153         linux_bionic: {
    154             cflags: ["-DTARGET_IS_64_BIT"],
    155         },
    156     },
    157     compile_multilib: "both",
    158 
    159     // Leave the symbols in the shared library so that stack unwinders can produce
    160     // meaningful name resolution.
    161     strip: {
    162         keep_symbols: true,
    163     },
    164 
    165     // Insert an extra objcopy step to add prefix to symbols. This is needed to prevent gdb
    166     // looking up symbols in the linker by mistake.
    167     prefix_symbols: "__dl_",
    168 }
    169