riscv64: build the linker.
The only meaningful change from alibaba's version is jr instead of jalr.
Also fix the comment that's in all the begin.S files while we're here.
Signed-off-by: Mao Han <han_mao@linux.alibaba.com>
Signed-off-by: Xia Lifang <lifang_xia@linux.alibaba.com>
Signed-off-by: Chen Guoyin <chenguoyin.cgy@linux.alibaba.com>
Signed-off-by: Wang Chen <wangchen20@iscas.ac.cn>
Signed-off-by: Lu Xufan <luxufan@iscas.ac.cn>
Test: ran mksh
Change-Id: I2645c78bd700b8a55bde363600d7f8b87de641a1
diff --git a/linker/Android.bp b/linker/Android.bp
index 57420a9..83077c6 100644
--- a/linker/Android.bp
+++ b/linker/Android.bp
@@ -52,6 +52,9 @@
arm64: {
srcs: ["arch/arm64/linker_wrapper_begin.S"],
},
+ riscv64: {
+ srcs: ["arch/riscv64/linker_wrapper_begin.S"],
+ },
x86_64: {
srcs: ["arch/x86_64/linker_wrapper_begin.S"],
},
@@ -208,6 +211,13 @@
}
filegroup {
+ name: "linker_sources_riscv64",
+ srcs: [
+ "arch/riscv64/begin.S",
+ ],
+}
+
+filegroup {
name: "linker_sources_x86",
srcs: [
"arch/x86/begin.S",
@@ -224,10 +234,11 @@
cc_defaults {
name: "linker_version_script_overlay",
arch: {
- arm: { version_script: "linker.arm.map" },
- arm64: { version_script: "linker.generic.map" },
- x86: { version_script: "linker.generic.map" },
- x86_64: { version_script: "linker.generic.map" },
+ arm: { version_script: "linker.arm.map" },
+ arm64: { version_script: "linker.generic.map" },
+ riscv64: { version_script: "linker.generic.map" },
+ x86: { version_script: "linker.generic.map" },
+ x86_64: { version_script: "linker.generic.map" },
},
}
@@ -259,6 +270,15 @@
keep_symbols: true,
},
},
+ riscv64: {
+ srcs: [":linker_sources_riscv64"],
+
+ // Leave the symbols in the shared library so that stack unwinders can produce
+ // meaningful name resolution.
+ strip: {
+ keep_symbols: true,
+ },
+ },
x86: {
srcs: [":linker_sources_x86"],
@@ -426,6 +446,7 @@
"-Wl,--exclude-libs=libgcc_stripped.a",
"-Wl,--exclude-libs=libclang_rt.builtins-arm-android.a",
"-Wl,--exclude-libs=libclang_rt.builtins-aarch64-android.a",
+ "-Wl,--exclude-libs=libclang_rt.builtins-riscv64-android.a",
"-Wl,--exclude-libs=libclang_rt.builtins-i686-android.a",
"-Wl,--exclude-libs=libclang_rt.builtins-x86_64-android.a",
],
diff --git a/linker/NOTICE b/linker/NOTICE
index 8f70d87..d61a193 100644
--- a/linker/NOTICE
+++ b/linker/NOTICE
@@ -334,3 +334,31 @@
-------------------------------------------------------------------
+Copyright (C) 2022 The Android Open Source Project
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+
+-------------------------------------------------------------------
+
diff --git a/linker/arch/arm/begin.S b/linker/arch/arm/begin.S
index 80d9fe1..3b673f0 100644
--- a/linker/arch/arm/begin.S
+++ b/linker/arch/arm/begin.S
@@ -35,6 +35,6 @@
mov r0, sp
bl __linker_init
- /* linker init returns the _entry address in the main image */
+ // __linker_init returns the address of the entry point in the main image.
bx r0
END(_start)
diff --git a/linker/arch/arm64/begin.S b/linker/arch/arm64/begin.S
index a947475..14999cd 100644
--- a/linker/arch/arm64/begin.S
+++ b/linker/arch/arm64/begin.S
@@ -35,6 +35,6 @@
mov x0, sp
bl __linker_init
- /* linker init returns the _entry address in the main image */
+ // __linker_init returns the address of the entry point in the main image.
br x0
END(_start)
diff --git a/linker/arch/riscv64/begin.S b/linker/arch/riscv64/begin.S
new file mode 100644
index 0000000..f7509c6
--- /dev/null
+++ b/linker/arch/riscv64/begin.S
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <private/bionic_asm.h>
+
+ENTRY(_start)
+ // Force unwinds to end in this function.
+ .cfi_undefined ra
+
+ mv a0, sp
+ jal __linker_init
+
+ // __linker_init returns the address of the entry point in the main image.
+ jr a0
+END(_start)
diff --git a/linker/arch/x86/begin.S b/linker/arch/x86/begin.S
index 3812646..81e2740 100644
--- a/linker/arch/x86/begin.S
+++ b/linker/arch/x86/begin.S
@@ -38,6 +38,6 @@
call __linker_init // %esp is aligned to 16 before the call.
addl $16, %esp
- /* linker init returns (%eax) the _entry address in the main image */
+ // __linker_init returns the address of the entry point in the main image.
jmp *%eax
END(_start)
diff --git a/linker/arch/x86_64/begin.S b/linker/arch/x86_64/begin.S
index 4722301..baba0db 100644
--- a/linker/arch/x86_64/begin.S
+++ b/linker/arch/x86_64/begin.S
@@ -35,6 +35,6 @@
mov %rsp, %rdi
call __linker_init
- /* linker init returns (%rax) the _entry address in the main image */
+ // __linker_init returns the address of the entry point in the main image.
jmp *%rax
END(_start)