From 1d891a32cf433e205b5d30697beb265dc0e1f248 Mon Sep 17 00:00:00 2001
From: Sterling Augustine <saugustine@google.com>
Date: Fri, 27 Dec 2019 11:52:12 -0800
Subject: [PATCH] Support powerpc and sparc when building without init_array.

Summary: Support powerpc and sparc when building without init_array.

Reviewers: rdhindsa, gribozavr

Subscribers: jyknight, nemanjai, fedor.sergeev, jsji, shchenz, steven.zhang, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D71944
---
 compiler-rt/lib/crt/crtbegin.c | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/compiler-rt/lib/crt/crtbegin.c b/compiler-rt/lib/crt/crtbegin.c
index 5b56ea3..b2b6279 100644
--- a/compiler-rt/lib/crt/crtbegin.c
+++ b/compiler-rt/lib/crt/crtbegin.c
@@ -48,8 +48,7 @@ static void __attribute__((used)) __do_init() {
 #ifdef CRT_HAS_INITFINI_ARRAY
 __attribute__((section(".init_array"),
                used)) static void (*__init)(void) = __do_init;
-#else  // CRT_HAS_INITFINI_ARRAY
-#if defined(__i386__) || defined(__x86_64__)
+#elif defined(__i386__) || defined(__x86_64__)
 __asm__(".pushsection .init,\"ax\",@progbits\n\t"
     "call " __USER_LABEL_PREFIX__ "__do_init\n\t"
     ".popsection");
@@ -57,8 +56,18 @@ __asm__(".pushsection .init,\"ax\",@progbits\n\t"
 __asm__(".pushsection .init,\"ax\",%progbits\n\t"
     "bl " __USER_LABEL_PREFIX__ "__do_init\n\t"
     ".popsection");
-#endif  // CRT_HAS_INITFINI_ARRAY
-#endif
+#elif defined(__powerpc__) || defined(__powerpc64__)
+__asm__(".pushsection .init,\"ax\",@progbits\n\t"
+    "bl " __USER_LABEL_PREFIX__ "__do_init\n\t"
+    "nop\n\t"
+    ".popsection");
+#elif defined(__sparc__)
+__asm__(".pushsection .init,\"ax\",@progbits\n\t"
+    "call " __USER_LABEL_PREFIX__ "__do_init\n\t"
+    ".popsection");
+#else
+#error "crtbegin without .init_fini array unimplemented for this architecture"
+#endif // CRT_HAS_INITFINI_ARRAY
 
 #ifndef CRT_HAS_INITFINI_ARRAY
 static fp __DTOR_LIST__[]
@@ -88,8 +97,7 @@ static void __attribute__((used)) __do_fini() {
 #ifdef CRT_HAS_INITFINI_ARRAY
 __attribute__((section(".fini_array"),
                used)) static void (*__fini)(void) = __do_fini;
-#else  // CRT_HAS_INITFINI_ARRAY
-#if defined(__i386__) || defined(__x86_64__)
+#elif defined(__i386__) || defined(__x86_64__)
 __asm__(".pushsection .fini,\"ax\",@progbits\n\t"
     "call " __USER_LABEL_PREFIX__ "__do_fini\n\t"
     ".popsection");
@@ -97,5 +105,15 @@ __asm__(".pushsection .fini,\"ax\",@progbits\n\t"
 __asm__(".pushsection .fini,\"ax\",%progbits\n\t"
     "bl " __USER_LABEL_PREFIX__ "__do_fini\n\t"
     ".popsection");
-#endif
+#elif defined(__powerpc__) || defined(__powerpc64__)
+__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
+    "bl " __USER_LABEL_PREFIX__ "__do_fini\n\t"
+    "nop\n\t"
+    ".popsection");
+#elif defined(__sparc__)
+__asm__(".pushsection .fini,\"ax\",@progbits\n\t"
+    "call " __USER_LABEL_PREFIX__ "__do_fini\n\t"
+    ".popsection");
+#else
+#error "crtbegin without .init_fini array unimplemented for this architecture"
 #endif  // CRT_HAS_INIT_FINI_ARRAY
-- 
2.7.4