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| author | Andi Kleen <ak@linux.intel.com> | 2013-11-05 21:22:28 +1030 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2013-11-07 12:13:05 +1030 |
| commit | cdd77e87eae52b7251acc5990207a1c4500a84ce (patch) | |
| tree | 3d0bddb36432618ae04d8486e2ed4f4268d8a93f /drivers/lguest | |
| parent | 4ae85370720156025e9cb873c13a0afb06ca1612 (diff) | |
| download | linux-cdd77e87eae52b7251acc5990207a1c4500a84ce.tar.gz linux-cdd77e87eae52b7251acc5990207a1c4500a84ce.tar.bz2 linux-cdd77e87eae52b7251acc5990207a1c4500a84ce.zip | |
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: x86@kernel.org
Cc: rusty@rustcorp.com.au
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/lguest')
| -rw-r--r-- | drivers/lguest/x86/core.c | 6 |
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 |