The "lea" instruction cannot load the effective address into a memory
location. The "g" constraint allows a compiler to use a memory location.
A compiler that uses a register destination does so only because one is
available. Use a general register constraint to make sure it always uses
a register.
Signed-off-by: Bill Wendling <morbo@xxxxxxxxxx>
---
x86/debug.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/x86/debug.c b/x86/debug.c
index f66d1d0..2327dac 100644
--- a/x86/debug.c
+++ b/x86/debug.c
@@ -113,7 +113,7 @@ int main(int ac, char **av)
"and $~(1<<8),%%rax\n\t"
"push %%rax\n\t"
"popf\n\t"
- : "=g" (start) : : "rax");
+ : "=r" (start) : : "rax");
report("single step",
n == 3 &&
db_addr[0] == start+1+6 && dr6[0] == 0xffff4ff0 &&
