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| author | Iain Sandoe <iain@sandoe.co.uk> | 2019-10-10 19:14:07 +0000 |
|---|---|---|
| committer | Iain Sandoe <iains@gcc.gnu.org> | 2019-10-10 19:14:07 +0000 |
| commit | 3a73cd7c9d4e51013aa526988e154a73b86e4970 (patch) | |
| tree | c06d581f219fc6df7f7a513a965ef7bc21535813 | |
| parent | eb870e5e5ed4d5b784533d23afee637543e7dacc (diff) | |
| download | gcc-3a73cd7c9d4e51013aa526988e154a73b86e4970.zip gcc-3a73cd7c9d4e51013aa526988e154a73b86e4970.tar.gz gcc-3a73cd7c9d4e51013aa526988e154a73b86e4970.tar.bz2 | |
[Darwin, machopic 4/n] Arrange to indirect IVARs when needed.
Objective C V2 (m64) IVAR offset refs from Apple GCC-4.x have an indirection
for m64 code on PPC (which is the only 64b user for Mach-O PIC). Apple GCC
4.x places the indirections in the .data section, however this seems to have
been unintentional - and we are placing the indirections in the non-lazy
symbol pointers section.
gcc/ChangeLog:
2019-10-10 Iain Sandoe <iain@sandoe.co.uk>
* config/darwin.c: Lookup Objective C metadata and force indirection
for IVAR refs.
From-SVN: r276848
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/darwin.c | 11 |
2 files changed, 16 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fea0085..f91ff7e 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2019-10-10 Iain Sandoe <iain@sandoe.co.uk> + + * config/darwin.c: Lookup Objective C metadata and force indirection + for IVAR refs. + 2019-10-10 Michael Meissner <meissner@linux.ibm.com> * config/rs6000/rs6000.c (quad_address_p): Add check for prefixed diff --git a/gcc/config/darwin.c b/gcc/config/darwin.c index f490f62..539ef75 100644 --- a/gcc/config/darwin.c +++ b/gcc/config/darwin.c @@ -1270,6 +1270,17 @@ darwin_encode_section_info (tree decl, rtx rtl, int first) || (DECL_WEAK (decl) && ! MACHO_SYMBOL_HIDDEN_VIS_P (sym_ref)) || lookup_attribute ("weakref", DECL_ATTRIBUTES (decl))) SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_MUST_INDIRECT; + +#if DARWIN_PPC + /* Objective C V2 (m64) IVAR offset refs from Apple GCC-4.x have an + indirection for m64 code on PPC. Historically, these indirections + also appear in the .data section. */ + tree o2meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); + o2meta = o2meta ? TREE_VALUE (o2meta) : NULL_TREE; + + if (o2meta && strncmp (IDENTIFIER_POINTER (o2meta), "V2_IVRF",7) == 0) + SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_MUST_INDIRECT; +#endif } void |