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Date: Sat, 19 Feb 2011 01:25:13 GMT From: "tip-bot for H. Peter Anvin" <hpa@...ux.intel.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com, brgerst@...il.com, castet.matthieu@...e.fr, tglx@...utronix.de, sfr@...b.auug.org.au, hpa@...ux.intel.com, rjw@...k.pl Subject: [tip:x86/trampoline] x86, reboot: Fix the use of passed arguments in 32-bit BIOS reboot Commit-ID: ee1b06ea6aed979da3b4e6b6ffea98ad55a3c5c1 Gitweb: http://git.kernel.org/tip/ee1b06ea6aed979da3b4e6b6ffea98ad55a3c5c1 Author: H. Peter Anvin <hpa@...ux.intel.com> AuthorDate: Fri, 18 Feb 2011 15:47:42 -0800 Committer: H. Peter Anvin <hpa@...ux.intel.com> CommitDate: Fri, 18 Feb 2011 15:47:42 -0800 x86, reboot: Fix the use of passed arguments in 32-bit BIOS reboot The initial version of this patch had %eax being a segment and %ecx being the mode. I had changed the interfaces, but not the actual implementation! Reported-by: Brian Gerst <brgerst@...il.com> LKML-Reference: <AANLkTikxqk=HEw9R-Du=v-1ti1HDGAY9vaNUep2XARaz@...l.gmail.com> Cc: Stephen Rothwell <sfr@...b.auug.org.au> Cc: Rafael J. Wysocki <rjw@...k.pl> Cc: Matthieu Castet <castet.matthieu@...e.fr> --- arch/x86/kernel/reboot_32.S | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/reboot_32.S b/arch/x86/kernel/reboot_32.S index f242356..29092b3 100644 --- a/arch/x86/kernel/reboot_32.S +++ b/arch/x86/kernel/reboot_32.S @@ -23,10 +23,14 @@ r_base = . 1: popl %ebx subl $1b, %ebx + /* Compute the equivalent real-mode segment */ + movl %ebx, %ecx + shrl $4, %ecx + /* Patch post-real-mode segment jump */ - movw dispatch_table(%ebx,%ecx,2),%cx - movw %cx, 101f(%ebx) - movw %ax, 102f(%ebx) + movw dispatch_table(%ebx,%eax,2),%ax + movw %ax, 101f(%ebx) + movw %cx, 102f(%ebx) /* Set up the IDT for real mode. */ lidtl machine_real_restart_idt(%ebx) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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