[PATCH] D100229: [lld-macho] Make load relaxation work for arm64_32
Jez Ng via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Apr 13 07:44:32 PDT 2021
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG682d1dfe0943: [lld-macho] Make load relaxation work for arm64_32 (authored by int3).
Changed prior to commit:
https://reviews.llvm.org/D100229?vs=336558&id=337150#toc
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D100229/new/
https://reviews.llvm.org/D100229
Files:
lld/MachO/Arch/ARM64Common.cpp
lld/test/MachO/arm64-32-reloc-got-load.s
Index: lld/test/MachO/arm64-32-reloc-got-load.s
===================================================================
--- /dev/null
+++ lld/test/MachO/arm64-32-reloc-got-load.s
@@ -0,0 +1,48 @@
+# REQUIRES: aarch64
+
+# RUN: rm -rf %t; split-file %s %t
+# RUN: llvm-mc -filetype=obj -triple=arm64_32-apple-darwin %t/main.s -o %t/main.o
+# RUN: llvm-mc -filetype=obj -triple=arm64_32-apple-darwin %t/foobar.s -o %t/foobar.o
+
+# RUN: %lld-watchos -lSystem -arch arm64_32 -o %t/static %t/main.o %t/foobar.o
+# RUN: llvm-objdump --macho -d --no-show-raw-insn --syms %t/static | FileCheck %s --check-prefix=STATIC
+
+# RUN: %lld-watchos -lSystem -arch arm64_32 -dylib -o %t/libfoo.dylib %t/foobar.o
+# RUN: %lld-watchos -lSystem -arch arm64_32 -o %t/main %t/main.o %t/libfoo.dylib
+# RUN: llvm-objdump --macho -d --no-show-raw-insn --section-headers %t/main | FileCheck %s --check-prefix=DYLIB
+
+# STATIC-LABEL: _main:
+# STATIC-NEXT: adrp x8, [[#]] ; 0x[[#%x,PAGE:]]
+# STATIC-NEXT: add x8, x8, #[[#%u,FOO_OFF:]]
+# STATIC-NEXT: adrp x8, [[#]] ; 0x[[#PAGE]]
+# STATIC-NEXT: add x8, x8, #[[#%u,BAR_OFF:]]
+# STATIC-NEXT: ret
+
+# STATIC-LABEL: SYMBOL TABLE:
+# STATIC-DAG: {{0*}}[[#%x,PAGE+FOO_OFF]] g F __TEXT,__text _foo
+# STATIC-DAG: {{0*}}[[#%x,PAGE+BAR_OFF]] g F __TEXT,__text _bar
+
+# DYLIB-LABEL: _main:
+# DYLIB-NEXT: adrp x8, [[#]] ; 0x[[#%x,GOT:]]
+# DYLIB-NEXT: ldr w8, [x8, #4]
+# DYLIB-NEXT: adrp x8, [[#]] ; 0x[[#GOT]]
+# DYLIB-NEXT: ldr w8, [x8]
+# DYLIB-NEXT: ret
+# DYLIB-NEXT: Sections:
+# DYLIB-NEXT: Idx Name Size VMA Type
+# DYLIB: [[#]] __got 00000008 [[#%.8x,GOT]] DATA
+
+#--- main.s
+.globl _main, _foo, _bar
+.p2align 2
+_main:
+ adrp x8, _foo at GOTPAGE
+ ldr w8, [x8, _foo at GOTPAGEOFF]
+ adrp x8, _bar at GOTPAGE
+ ldr w8, [x8, _bar at GOTPAGEOFF]
+ ret
+
+#--- foobar.s
+.globl _foo, _bar
+_foo:
+_bar:
Index: lld/MachO/Arch/ARM64Common.cpp
===================================================================
--- lld/MachO/Arch/ARM64Common.cpp
+++ lld/MachO/Arch/ARM64Common.cpp
@@ -98,8 +98,9 @@
// ARM DDI 0487G.a (ID011921)
uint32_t instruction = read32le(loc);
// C6.2.132 LDR (immediate)
- // LDR <Xt>, [<Xn|SP>{, #<pimm>}]
- if ((instruction & 0xffc00000) != 0xf9400000)
+ // This matches both the 64- and 32-bit variants:
+ // LDR <(X|W)t>, [<Xn|SP>{, #<pimm>}]
+ if ((instruction & 0xbfc00000) != 0xb9400000)
error(getRelocAttrs(type).name + " reloc requires LDR instruction");
assert(((instruction >> 10) & 0xfff) == 0 &&
"non-zero embedded LDR immediate");
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