[PATCH] x86-64: Fix incorrect FP signals
authorChuck Ebbert <76306.1226@compuserve.com>
Mon, 12 Sep 2005 16:49:25 +0000 (18:49 +0200)
committerLinus Torvalds <torvalds@g5.osdl.org>
Mon, 12 Sep 2005 17:50:58 +0000 (10:50 -0700)
commitff347b221512a83e7b08356729e3e2c14346e29e
tree3af9934eecd9ce119a840f53912e657951da9656
parent847815760cc0f41985b3185d780aa4369fcb475d
[PATCH] x86-64: Fix incorrect FP signals

This is the same patch that went into i386 just before 2.6.13
came out.  I still can't build 64-bit user apps, so I tested
with program (see below) in 32-bit mode on 64-bit kernel:

Before:

$ fpsig
handler: nr = 8, si = 0x0804bc90, vuc = 0x0804bd10
handler: altstack is at 0x0804b000, ebp = 0x0804bc7c
handler: si_signo = 8, si_errno = 0, si_code = 0 [unknown]
handler: fpu cwd = 0xb40, fpu swd = 0xbaa0
handler: i387 unmasked precision exception, rounded up

After:

$ fpsig
handler: nr = 8, si = 0x0804bc90, vuc = 0x0804bd10
handler: altstack is at 0x0804b000, ebp = 0x0804bc7c
handler: si_signo = 8, si_errno = 0, si_code = 6 [inexact result]
handler: fpu cwd = 0xb40, fpu swd = 0xbaa0
handler: i387 unmasked precision exception, rounded up

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/x86_64/kernel/traps.c