forked from mirrors/nixpkgs
47 lines
1.7 KiB
Diff
47 lines
1.7 KiB
Diff
From cdd77e87eae52b7251acc5990207a1c4500a84ce Mon Sep 17 00:00:00 2001
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From: Andi Kleen <ak@linux.intel.com>
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Date: Tue, 5 Nov 2013 21:22:28 +1030
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Subject: x86, asmlinkage, lguest: Pass in globals into assembler statement
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Tell the compiler that the inline assembler statement
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references lguest_entry.
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This fixes compile problems with LTO where the variable
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and the assembler code may end up in different files.
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Cc: x86@kernel.org
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Cc: rusty@rustcorp.com.au
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Signed-off-by: Andi Kleen <ak@linux.intel.com>
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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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---
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drivers/lguest/x86/core.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
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index 5169239..922a1ac 100644
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--- a/drivers/lguest/x86/core.c
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+++ b/drivers/lguest/x86/core.c
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@@ -157,7 +157,7 @@ static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *pages)
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* stack, then the address of this call. This stack layout happens to
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* exactly match the stack layout created by an interrupt...
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*/
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- asm volatile("pushf; lcall *lguest_entry"
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+ asm volatile("pushf; lcall *%4"
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/*
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* This is how we tell GCC that %eax ("a") and %ebx ("b")
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* are changed by this routine. The "=" means output.
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@@ -169,7 +169,9 @@ static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *pages)
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* physical address of the Guest's top-level page
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* directory.
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*/
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- : "0"(pages), "1"(__pa(cpu->lg->pgdirs[cpu->cpu_pgd].pgdir))
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+ : "0"(pages),
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+ "1"(__pa(cpu->lg->pgdirs[cpu->cpu_pgd].pgdir)),
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+ "m"(lguest_entry)
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/*
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* We tell gcc that all these registers could change,
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* which means we don't have to save and restore them in
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--
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cgit v0.12
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