[PATCH] D86908: [lld-macho] Mark weak symbols in symbol table
Jez Ng via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Sep 8 16:25:48 PDT 2020
int3 updated this revision to Diff 290604.
int3 marked an inline comment as done.
int3 added a comment.
adjust comment
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D86908/new/
https://reviews.llvm.org/D86908
Files:
lld/MachO/SyntheticSections.cpp
lld/test/MachO/symtab.s
Index: lld/test/MachO/symtab.s
===================================================================
--- lld/test/MachO/symtab.s
+++ lld/test/MachO/symtab.s
@@ -20,7 +20,8 @@
# CHECK-NEXT: Type: Section (0xE)
# CHECK-NEXT: Section: __text (0x1)
# CHECK-NEXT: RefType:
-# CHECK-NEXT: Flags [ (0x0)
+# CHECK-NEXT: Flags [ (0x80)
+# CHECK-NEXT: WeakDef (0x80)
# CHECK-NEXT: ]
# CHECK-NEXT: Value:
# CHECK-NEXT: }
@@ -42,6 +43,7 @@
.asciz "Hello world!\n"
.text
+.weak_definition bar
.global bar
.global _main
Index: lld/MachO/SyntheticSections.cpp
===================================================================
--- lld/MachO/SyntheticSections.cpp
+++ lld/MachO/SyntheticSections.cpp
@@ -473,10 +473,11 @@
for (const SymtabEntry &entry : symbols) {
nList->n_strx = entry.strx;
// TODO support other symbol types
- // TODO populate n_desc
+ // TODO populate n_desc with more flags
if (auto *defined = dyn_cast<Defined>(entry.sym)) {
nList->n_type = MachO::N_EXT | MachO::N_SECT;
nList->n_sect = defined->isec->parent->index;
+ nList->n_desc |= defined->isWeakDef() ? MachO::N_WEAK_DEF : 0;
// For the N_SECT symbol type, n_value is the address of the symbol
nList->n_value = defined->value + defined->isec->getVA();
}
-------------- next part --------------
A non-text attachment was scrubbed...
Name: D86908.290604.patch
Type: text/x-patch
Size: 1330 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20200908/d1a98313/attachment.bin>
More information about the llvm-commits
mailing list