<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [any/all(?) cards below nv50(?)] libdrm built with gcc4.8 causes crashes/lockups during normal operation, and resume from disk/memory" href="https://bugs.freedesktop.org/show_bug.cgi?id=71116#c21">Comment # 21</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [any/all(?) cards below nv50(?)] libdrm built with gcc4.8 causes crashes/lockups during normal operation, and resume from disk/memory" href="https://bugs.freedesktop.org/show_bug.cgi?id=71116">bug 71116</a> from <a class="email" href="mailto:bugs@mblankhorst.nl" title="Maarten Lankhorst <bugs@mblankhorst.nl>"> Maarten Lankhorst</a> <pre>Compiled code with this patch: 00000000000015b0 <nouveau_pushbuf_reloc>: 15b0: 55 push %rbp 15b1: 48 8b 6f 30 mov 0x30(%rdi),%rbp 15b5: 53 push %rbx 15b6: 48 89 fb mov %rdi,%rbx 15b9: e8 42 ea ff ff callq 0 <pushbuf_krel> 15be: 89 45 00 mov %eax,0x0(%rbp) 15c1: 48 83 43 30 04 addq $0x4,0x30(%rbx) 15c6: 5b pop %rbx 15c7: 5d pop %rbp 15c8: c3 retq Without: 0000000000001650 <nouveau_pushbuf_reloc>: 1650: 48 89 5c 24 f0 mov %rbx,-0x10(%rsp) 1655: 48 89 6c 24 f8 mov %rbp,-0x8(%rsp) 165a: 48 83 ec 10 sub $0x10,%rsp 165e: 48 8b 6f 30 mov 0x30(%rdi),%rbp 1662: 48 89 fb mov %rdi,%rbx 1665: e8 96 e9 ff ff callq 0 <pushbuf_krel> 166a: 89 45 00 mov %eax,0x0(%rbp) 166d: 48 83 c5 04 add $0x4,%rbp 1671: 48 89 6b 30 mov %rbp,0x30(%rbx) 1675: 48 8b 1c 24 mov (%rsp),%rbx 1679: 48 8b 6c 24 08 mov 0x8(%rsp),%rbp 167e: 48 83 c4 10 add $0x10,%rsp 1682: c3 retq It seems that the nouveau_pushbuf_reloc difference is harmless. Code is equivalent, except that without the patch applied it uses another temp variable causing less optimal code generation. Remaining candidates: pushbuf_validate, nouveau_pushbuf_data, nouveau_pushbuf_del.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>