[libc-commits] [PATCH] D151539: [libc] Initiliaze the global pointer in riscv startup code.

[Siva Chandra via Phabricator via libc-commits]

sivachandra created this revision.
sivachandra added a reviewer: mikhail.ramalho.
Herald added subscribers: libc-commits, luke, VincentWu, vkmr, frasercrmck, luismarques, apazos, sameer.abuasal, tschuett, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, arichardson.
Herald added projects: libc-project, All.
sivachandra requested review of this revision.
Herald added subscribers: pcwang-thead, eopXD.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151539

Files:
  libc/startup/linux/riscv64/start.cpp


Index: libc/startup/linux/riscv64/start.cpp
===================================================================
--- libc/startup/linux/riscv64/start.cpp
+++ libc/startup/linux/riscv64/start.cpp
@@ -122,7 +122,13 @@
   uint64_t value;
 };
 
+extern "C" {
+extern intptr_t __global_pointer$;
+}
+
 __attribute__((noinline)) static void do_start() {
+  void *ptr = &__global_pointer$;
+  LIBC_INLINE_ASM("ld gp, %0\n\t" : : "m"(ptr));
   auto tid = __llvm_libc::syscall_impl(SYS_gettid);
   if (tid <= 0)
     __llvm_libc::syscall_impl(SYS_exit, 1);


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