[Clang] Pass -z max-page-size to linker for Fuchsia

Currently all Fuchsia ABIs use a 4k page size, departing from
the recommended page sizes in the respective psABI documents.

Differential Revision: https://reviews.llvm.org/D79667

diff --git a/clang/lib/Driver/ToolChains/Fuchsia.cpp b/clang/lib/Driver/ToolChains/Fuchsia.cpp
index 9a8f14d..8f48580 100644 (file)
--- a/clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ b/clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -47,6 +47,9 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   Args.ClaimAllArgs(options::OPT_w);
 
   CmdArgs.push_back("-z");
+  CmdArgs.push_back("max-page-size=4096");
+
+  CmdArgs.push_back("-z");
   CmdArgs.push_back("now");
 
   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());

diff --git a/clang/test/Driver/fuchsia.c b/clang/test/Driver/fuchsia.c
index 3aceba7..359a279 100644 (file)
--- a/clang/test/Driver/fuchsia.c
+++ b/clang/test/Driver/fuchsia.c
@@ -23,7 +23,7 @@
 // CHECK-X86_64: "-fsanitize=safe-stack"
 // CHECK: "-stack-protector" "2"
 // CHECK-NOT: "-fcommon"
-// CHECK: {{.*}}ld.lld{{.*}}" "-z" "now" "-z" "rodynamic" "-z" "separate-loadable-segments" "--pack-dyn-relocs=relr"
+// CHECK: {{.*}}ld.lld{{.*}}" "-z" "max-page-size=4096" "-z" "now" "-z" "rodynamic" "-z" "separate-loadable-segments" "--pack-dyn-relocs=relr"
 // CHECK: "--sysroot=[[SYSROOT]]"
 // CHECK: "-pie"
 // CHECK: "--build-id"