http://d.puremagic.com/issues/show_bug.cgi?id=5818
Summary: 64bit ASM can't have 32-bit stack operands Product: D Version: D1 & D2 Platform: Other OS/Version: Linux Status: NEW Severity: normal Priority: P2 Component: druntime AssignedTo: nob...@puremagic.com ReportedBy: ibuc...@ubuntu.com --- Comment #0 from Iain Buclaw <ibuc...@ubuntu.com> 2011-04-08 08:52:52 PDT --- This is a question rolled into a report (it's affecting me, at least). This excerpt (in core/thread.d for D2; in gc/gcx.d for D1 and D2) - the "push EAX" instruction is not legal x86_64 asm code - according to the GNU 64bit Assembler, which is strong enough an argument for me to follow - so is not compilable with the GDC 64bit compiler (and maybe LDC too). asm { push RAX ; push RBX ; push RCX ; push RDX ; push RSI ; push RDI ; push RBP ; push R8 ; push R9 ; push R10 ; push R11 ; push R12 ; push R13 ; push R14 ; push R15 ; --> push EAX ; // 16 byte align the stack <-- This line causes the error mov sp[RBP],RSP ; } So, what to do? Well, first I think druntime should consider revising this code for a start. And secondly, DMD should be hardened to catch and disallow this. Some thoughts for how to change it: In 32bit mode: pusha (afaik) saves (e)ax, cx, dx, bx, sp, bp, si, di popa restores (e)di, si, bp, bx, dx, cx, ax (note, stack is not popped) In GCC builtins: unwind_init (what is currently being used in place of the above illegal code in GDC) saves only the rbx, r12, r13, r14 and r15 registers. Regards -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------