riscv64 TLS support.
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: treehugger
Change-Id: I14efb4a03a3dc2ec736d7e47a3f8859c886eb9d6
diff --git a/libc/platform/bionic/tls_defines.h b/libc/platform/bionic/tls_defines.h
index 78099b3..3e2efa3 100644
--- a/libc/platform/bionic/tls_defines.h
+++ b/libc/platform/bionic/tls_defines.h
@@ -114,6 +114,28 @@
#define TLS_SLOT_BIONIC_TLS 9
#define MAX_TLS_SLOT 9 // update this value when reserving a slot
+#elif defined(__riscv)
+
+// RISC-V ELF Specification[1] specifies that RISC-V uses Variant I as described
+// by the ELF TLS specification, with tp containing the address one past the end
+// of the TCB.
+//
+// [1]: RISC-V ELF Specification. Section: Thread Local Storage
+// https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-elf.adoc#thread-local-storage
+
+#define MIN_TLS_SLOT (-9) // update this value when reserving a slot
+
+#define TLS_SLOT_BIONIC_TLS (-9)
+#define TLS_SLOT_DTV (-8)
+#define TLS_SLOT_THREAD_ID (-7)
+#define TLS_SLOT_APP (-6)
+#define TLS_SLOT_OPENGL (-5)
+#define TLS_SLOT_OPENGL_API (-4)
+#define TLS_SLOT_STACK_GUARD (-3)
+#define TLS_SLOT_SANITIZER (-2)
+#define TLS_SLOT_ART_THREAD_SELF (-1)
+#define MAX_TLS_SLOT (-1)
+
#endif
#define BIONIC_TLS_SLOTS (MAX_TLS_SLOT - MIN_TLS_SLOT + 1)