diff mbox series

[06/10] KVM: arm64: nVHE: gen-hyprel: Skip R_AARCH64_ABS32

Message ID e017fb72f9aef1de10cb958bfeda87496d3ee9e0.1710446682.git.ptosi@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: arm64: Add support for hypervisor kCFI | expand

Commit Message

Pierre-Clément Tosi March 14, 2024, 8:24 p.m. UTC 
Ignore R_AARCH64_ABS32 relocations, instead of panicking, when emitting
the relocation table of the hypervisor. The toolchain might produce them
when generating function calls with KCFI, to allow type ID resolution
across compilation units (between the call-site check and the callee's
prefixed u32) at link time. They are therefore not needed in the final
(runtime) relocation table.

Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>
---
 arch/arm64/kvm/hyp/nvhe/gen-hyprel.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/kvm/hyp/nvhe/gen-hyprel.c b/arch/arm64/kvm/hyp/nvhe/gen-hyprel.c
index 6bc88a756cb7..7b046d97b301 100644
--- a/arch/arm64/kvm/hyp/nvhe/gen-hyprel.c
+++ b/arch/arm64/kvm/hyp/nvhe/gen-hyprel.c
@@ -50,6 +50,9 @@ 
 #ifndef R_AARCH64_ABS64
 #define R_AARCH64_ABS64			257
 #endif
+#ifndef R_AARCH64_ABS32
+#define R_AARCH64_ABS32			258
+#endif
 #ifndef R_AARCH64_PREL64
 #define R_AARCH64_PREL64		260
 #endif
@@ -383,6 +386,9 @@  static void emit_rela_section(Elf64_Shdr *sh_rela)
 		case R_AARCH64_ABS64:
 			emit_rela_abs64(rela, sh_orig_name);
 			break;
+		/* Allow 32-bit absolute relocation, for KCFI type hashes. */
+		case R_AARCH64_ABS32:
+			break;
 		/* Allow position-relative data relocations. */
 		case R_AARCH64_PREL64:
 		case R_AARCH64_PREL32: