Bug 472000
| Summary: | SIGILL in pixman; PPC signal handling busted | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Dan Williams <dcbw> |
| Component: | pixman | Assignee: | Adam Jackson <ajax> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | rawhide | CC: | ajax, dwmw2 |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-11-18 21:38:06 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Dan Williams
2008-11-18 03:57:30 UTC
the pixman code at fault is:
#include <signal.h>
#include <setjmp.h>
static jmp_buf jump_env;
static void vmx_test(int sig, siginfo_t *si, void *unused) {
longjmp (jump_env, 1);
}
pixman_bool_t pixman_have_vmx (void) {
struct sigaction sa, osa;
int jmp_result;
if (!initialized) {
sa.sa_flags = SA_SIGINFO;
sigemptyset(&sa.sa_mask);
sa.sa_sigaction = vmx_test;
sigaction(SIGILL, &sa, &osa);
jmp_result = setjmp (jump_env);
if (jmp_result == 0) {
asm volatile ( "vor 0, 0, 0" );
}
sigaction(SIGILL, &osa, NULL);
have_vmx = (jmp_result == 0);
initialized = TRUE;
}
return have_vmx;
}
It seems like the SIGILL redirection simply isn't working.
glibc-2.9-2.ppc
kernel-2.6.27.5-109.fc10.ppc
gcc-4.3.2-7.ppc
This is an iBook G3 800: processor : 0 cpu : 750FX temperature : 46 C (uncalibrated) clock : 400.000000MHz revision : 2.3 (pvr 7000 0203) bogomips : 24.76 timebase : 24835245 platform : PowerMac model : PowerBook4,3 machine : PowerBook4,3 motherboard : PowerBook4,3 MacRISC2 MacRISC Power Macintosh detected as : 257 (iBook 2 rev. 2) pmac flags : 0000001b L2 cache : 512K unified pmac-generation : NewWorld (not really 400MHz, but cpu throttling is probably on) What happened to the patch in bug #451831 ? Apparently it's not in current builds. Not sure what ajax was smoking :) Working with soren to get the patch from bug #451831 upstream. pixman-0.12.0-2.fc10, committed upstream too |