From b8d153eb4dee2ac22fc09cfba99dbae48c724b88 Mon Sep 17 00:00:00 2001 From: "Chang S. Bae" Date: Mon, 13 Aug 2018 13:50:18 -0700 Subject: [PATCH] macho: Turn off jump-match optimization for subsections_via_symbols The jump-match optimization tends to remove labels. When the "subsections_via_symbols" pragma is declared, all the labels should be emitted. Disabling the optimization (only) makes the pragma effective. It might be cleaner to extend the OFMT interface to support callback function. In this case, the reconfiguration can be done through the callback interface, rather than direct access to the global variable. Signed-off-by: Chang S. Bae --- output/outmacho.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/output/outmacho.c b/output/outmacho.c index 93b4768e..d092cf23 100644 --- a/output/outmacho.c +++ b/output/outmacho.c @@ -1891,6 +1891,9 @@ macho_pragma(const struct pragma *pragma) if (real) head_flags |= MH_SUBSECTIONS_VIA_SYMBOLS; + /* Jmp-match optimization conflicts */ + optimizing.flag |= OPTIM_DISABLE_JMP_MATCH; + return DIRR_OK; case D_NO_DEAD_STRIP: