I believe that there’s a mnemonic that forces alignment that we could (arguably should?) be using before these labels.
IIRC it’s something like .align N — if we aren’t doing this already we could make the lint assembler backend emit a .align 16 prior to each global symbol. —Oliver On Sep 26, 2013, at 1:09 AM, Gabor Rapcsanyi <rga...@inf.u-szeged.hu> wrote: > Hello! > > I'm fighting with a strange LLInt alignment problem on ARM. As I see we put > the LLInt code into .rodata section instead of .text. > Is there a specific reason why we are doing this? If there is not I would put > them to the .text section. > > Here is the objdump: > > ./Source/JavaScriptCore/.obj/release-shared/llint/LowLevelInterpreter.o: file > format elf32-littlearm > > Disassembly of section .rodata: > > 00000000 <_ZStL19piecewise_construct>: > 0: 00000000 andeq r0, r0, r0 > > 00000004 <_ZStL13allocator_arg>: > 4: 00000000 andeq r0, r0, r0 > > 00000008 <_ZStL6ignore>: > ... > > 00000009 <llint_begin>: > 9: e30b3eef movw r3, #48879 ; 0xbeef > d: e34b3bad movt r3, #48045 ; 0xbbad > 11: e5830000 str r0, [r3] > 15: e3a00000 mov r0, #0 > 19: e12fff30 blx r0 > > 0000001d <llint_program_prologue>: > 1d: e1a0200e mov r2, lr > 21: e5852010 str r2, [r5, #16] > 25: e5951008 ldr r1, [r5, #8] > ... > > > The problem is that these traditional instructions are lying on odd adresses > in the .rodata section. > > Regards, > Gabor > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-dev _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org https://lists.webkit.org/mailman/listinfo/webkit-dev
