[lld] Error on unsupported split stack (#88063)
Targets with no `-fstack-split` support now emit `ld.lld: error: target
doesn't support split stacks` instead of `UNREACHABLE executed` with a
backtrace asking the user to report a bug.
Resolves #88061
GitOrigin-RevId: 96aac6798bf6addcedebbb893669cc9c61fcf9c7
diff --git a/ELF/Target.cpp b/ELF/Target.cpp
index d879a42..3e22164 100644
--- a/ELF/Target.cpp
+++ b/ELF/Target.cpp
@@ -141,7 +141,7 @@
bool TargetInfo::adjustPrologueForCrossSplitStack(uint8_t *loc, uint8_t *end,
uint8_t stOther) const {
- llvm_unreachable("Target doesn't support split stacks.");
+ fatal("target doesn't support split stacks");
}
bool TargetInfo::inBranchRange(RelType type, uint64_t src, uint64_t dst) const {
diff --git a/test/ELF/riscv-split-stack.s b/test/ELF/riscv-split-stack.s
new file mode 100644
index 0000000..e6ebf9f
--- /dev/null
+++ b/test/ELF/riscv-split-stack.s
@@ -0,0 +1,24 @@
+# REQUIRES: riscv
+
+# RUN: split-file %s %t
+# RUN: llvm-mc -filetype=obj -triple=riscv64 %t/main.s -o %t.64.o
+# RUN: llvm-mc -filetype=obj -triple=riscv64 %t/callee.s -o %t.64.2.o
+# RUN: not ld.lld %t.64.o %t.64.2.o -o %t.64 2>&1 | FileCheck %s
+# CHECK: error: target doesn't support split stacks
+
+#--- main.s
+ .globl _start
+ .type _start,@function
+_start:
+ call test
+ ret
+end:
+ .size _start, end-_start
+ .section ".note.GNU-split-stack","",@progbits
+
+
+#--- callee.s
+ .globl test
+ .type test,@function
+test:
+ ret
