path: root/drivers
diff options
authorAndi Kleen <>2013-11-05 21:22:28 +1030
committerRusty Russell <>2013-11-07 12:13:05 +1030
commitcdd77e87eae52b7251acc5990207a1c4500a84ce (patch)
tree3d0bddb36432618ae04d8486e2ed4f4268d8a93f /drivers
parent4ae85370720156025e9cb873c13a0afb06ca1612 (diff)
x86, asmlinkage, lguest: Pass in globals into assembler statement
Tell the compiler that the inline assembler statement references lguest_entry. This fixes compile problems with LTO where the variable and the assembler code may end up in different files. Cc: Cc: Signed-off-by: Andi Kleen <> Signed-off-by: Rusty Russell <>
Diffstat (limited to 'drivers')
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index 516923926335..922a1acbf652 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -157,7 +157,7 @@ static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *pages)
* stack, then the address of this call. This stack layout happens to
* exactly match the stack layout created by an interrupt...
- asm volatile("pushf; lcall *lguest_entry"
+ asm volatile("pushf; lcall *%4"
* This is how we tell GCC that %eax ("a") and %ebx ("b")
* are changed by this routine. The "=" means output.
@@ -169,7 +169,9 @@ static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *pages)
* physical address of the Guest's top-level page
* directory.
- : "0"(pages), "1"(__pa(cpu->lg->pgdirs[cpu->cpu_pgd].pgdir))
+ : "0"(pages),
+ "1"(__pa(cpu->lg->pgdirs[cpu->cpu_pgd].pgdir)),
+ "m"(lguest_entry)
* We tell gcc that all these registers could change,
* which means we don't have to save and restore them in