Merge "Add build description for libdw" am: ee729f7e73

Original change: https://android-review.googlesource.com/c/platform/external/elfutils/+/1346247

Change-Id: Ied84473132346382df6d510bc7dc916834c9377e

4 files changed, 146 insertions, 0 deletions

diff --git a/Android.bp b/Android.bp
index 992122f2..385004cf 100644
--- a/Android.bp
+++ b/Android.bp
@@ -17,6 +17,8 @@ cc_defaults {
     cflags: [
         "-DHAVE_CONFIG_H",
         "-D_GNU_SOURCE",
+        // upper bound for the number of lines of the resulting mnemonic files
+        "-DNMNES=1000",
         "-std=gnu99",
         "-Werror",
         // to suppress the "pointer of type ‘void *’ used in arithmetic" warning
@@ -27,6 +29,11 @@ cc_defaults {
          "elfutils_headers",
     ],
     export_header_lib_headers: ["elfutils_headers"],
+
+    visibility: [
+        "//external/dwarves:__subpackages__",
+        "//external/elfutils:__subpackages__",
+    ],
 }
 
 cc_library {
@@ -80,3 +87,50 @@ cc_library_headers {
     visibility: [":__subpackages__"],
 }
 
+cc_library_host_static {
+    name: "libdw",
+    defaults: ["elfutils_defaults"],
+    srcs: [
+        "backends/*.c",
+        "libcpu/*_disasm.c",
+        "libdw/*.c",
+        "libdwelf/*.c",
+        "libdwfl/*.c",
+        "libebl/*.c",
+    ],
+    generated_headers: [
+        "i386_dis",
+        "i386_mnemonics",
+        "x86_64_dis",
+        "x86_64_mnemonics",
+    ],
+    exclude_srcs: [
+        // Do not enabled compression support
+        "libdwfl/bzip2.c",
+        "libdwfl/lzma.c",
+        // Those headers are incompatible with clang due to nested function
+        // definitions.
+        "libdwfl/dwfl_segment_report_module.c",
+        "libdwfl/elf-from-memory.c",
+        "libdwfl/link_map.c",
+        // Those are common source files actually used as headers and not
+        // compiled standalone.
+        "backends/common-reloc.c",
+        "backends/linux-core-note.c",
+        "backends/x86_corenote.c",
+    ],
+    local_include_dirs: [
+        "libcpu",
+        "libasm",
+        "libdwelf",
+        "libdwfl",
+        "libebl",
+    ],
+    export_include_dirs: [
+        "libdw",
+    ],
+    static_libs: [
+        "libelf"
+    ],
+}
+
diff --git a/lib/Android.bp b/lib/Android.bp
new file mode 100644
index 00000000..31647ee5
--- /dev/null
+++ b/lib/Android.bp
@@ -0,0 +1,7 @@
+cc_library_host_static {
+    name: "libeu",
+    defaults: ["elfutils_defaults"],
+    srcs: ["*.c"],
+    exclude_srcs: ["dynamicsizehash*.c"],
+}
+
diff --git a/libcpu/Android.bp b/libcpu/Android.bp
new file mode 100644
index 00000000..5ffe48ae
--- /dev/null
+++ b/libcpu/Android.bp
@@ -0,0 +1,75 @@
+genrule {
+    name: "i386_mnemonics",
+    srcs: [
+        "defs/i386",
+    ],
+    out: ["i386.mnemonics"],
+    cmd: "M4=$(location m4) $(location mnemonic_preprocess.sh) i386 $(in) $(out)",
+    tool_files: [
+        "mnemonic_preprocess.sh",
+    ],
+    tools : [
+        "m4",
+    ]
+}
+
+genrule {
+    name: "x86_64_mnemonics",
+    srcs : [
+        "defs/i386",
+    ],
+    out : ["x86_64.mnemonics"],
+    cmd : "M4=$(location m4) $(location mnemonic_preprocess.sh) x86_64 $(in) $(out)",
+    tool_files : [
+        "mnemonic_preprocess.sh",
+    ],
+    tools : [
+        "m4",
+    ]
+}
+
+cc_binary_host {
+    name: "i386_gendis",
+    defaults: ["elfutils_defaults"],
+    srcs: [
+        "i386_parse.y",
+        "i386_lex.l",
+        "i386_gendis.c",
+    ],
+    yacc: {
+        flags: ["-pi386_",]
+    },
+    lex: {
+        flags: ["-Pi386_",]
+    },
+    static_libs: [
+        "libeu",
+    ],
+}
+
+genrule {
+    name: "i386_dis",
+    srcs: [
+        "defs/i386",
+    ],
+    out: ["i386_dis.h"],
+    cmd: "$(location m4) -Di386 -DDISASSEMBLER $(in) > i386_defs && $(location i386_gendis) i386_defs > $(out)",
+    tools: [
+        "i386_gendis",
+        "m4",
+    ],
+}
+
+genrule {
+    name: "x86_64_dis",
+    srcs: [
+        "defs/i386",
+    ],
+    out: ["x86_64_dis.h"],
+    cmd: "$(location m4) -Dx86_64 -DDISASSEMBLER $(in) > x86_64_defs && $(location i386_gendis) x86_64_defs > $(out)",
+    tools: [
+        "i386_gendis",
+        "m4",
+    ],
+}
+
diff --git a/libcpu/mnemonic_preprocess.sh b/libcpu/mnemonic_preprocess.sh
new file mode 100755
index 00000000..2b052495
--- /dev/null
+++ b/libcpu/mnemonic_preprocess.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+arch="$1"
+defs="$2"
+out="$3"
+
+$M4 "-D${arch}" -DDISASSEMBLER "$defs" \
+	| sed "1,/^%%/d;/^#/d;/^[[:space:]]*$/d;s/[^:]*:\([^[:space:]]*\).*/MNE(\\1)/;s/{[^}]*}//g;/INVALID/d" \
+	| sort -u \
+> "$out"