Module: ppl/ppl Branch: master Commit: 3c526a80d5c063d3f66c2fd2ed438d9d5fe91274 URL: http://www.cs.unipr.it/git/gitweb.cgi?p=ppl/ppl.git;a=commit;h=3c526a80d5c06...

Author: Roberto Bagnara bagnara@cs.unipr.it Date: Tue Feb 22 09:51:45 2011 +0100

No longer overwrite the SIGILL handler.

---

src/fpu-ia32.cc | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/fpu-ia32.cc b/src/fpu-ia32.cc index d361411..21aa6e3 100644 --- a/src/fpu-ia32.cc +++ b/src/fpu-ia32.cc @@ -37,7 +37,6 @@ jmp_buf env;

void illegal_instruction_catcher(int) { - signal(SIGILL, SIG_DFL); longjmp(env, 1); }

@@ -49,6 +48,7 @@ bool have_sse_unit = true;

void detect_sse_unit() { + void (*old)(int); if (setjmp(env)) { // We will end up here if sse_get_control() raises SIGILL. have_sse_unit = false; @@ -56,14 +56,14 @@ detect_sse_unit() { }

// Install our own signal handler for SIGILL. - signal(SIGILL, illegal_instruction_catcher); + old = signal(SIGILL, illegal_instruction_catcher); (void) sse_get_control(); // sse_get_control() did not raise SIGILL: we have an SSE unit. have_sse_unit = true;

restore_sigill_handler: - // Restore the default signal handler for SIGILL. - signal(SIGILL, SIG_DFL); + // Restore the previous signal handler for SIGILL. + signal(SIGILL, old); }

} // namespace Parma_Polyhedra_Library