Even if MAX_ARGS - 2 (for arm) or MAX_ARGS - 7 (for aarch64) parameters
are passed on the stack to checkasm_checked_call, we actually only
need to store MAX_ARGS - 4 (for arm) or MAX_ARGS - 8 (for aarch64)
parameters on the stack when calling the tested function.
Signed-off-by: Martin Storsjö <martin@martin.st>
// max number of args used by any asm function.
#define MAX_ARGS 15
// max number of args used by any asm function.
#define MAX_ARGS 15
-#define ARG_STACK ((8*(MAX_ARGS - 7) + 15) & ~15)
+#define ARG_STACK ((8*(MAX_ARGS - 8) + 15) & ~15)
function checkasm_checked_call, export=1
stp x29, x30, [sp, #-16]!
function checkasm_checked_call, export=1
stp x29, x30, [sp, #-16]!
sub sp, sp, #ARG_STACK
.equ pos, 0
// the first stacked arg is copied to x7
sub sp, sp, #ARG_STACK
.equ pos, 0
// the first stacked arg is copied to x7
ldr x9, [x29, #16 + 8 + pos]
str x9, [sp, #pos]
.equ pos, pos + 8
ldr x9, [x29, #16 + 8 + pos]
str x9, [sp, #pos]
.equ pos, pos + 8
@ max number of args used by any asm function.
#define MAX_ARGS 15
@ max number of args used by any asm function.
#define MAX_ARGS 15
-#define ARG_STACK 4*(MAX_ARGS - 2)
+#define ARG_STACK 4*(MAX_ARGS - 4)
@ align the used stack space to 8 to preserve the stack alignment
#define ARG_STACK_A (((ARG_STACK + pushed + 7) & ~7) - pushed)
@ align the used stack space to 8 to preserve the stack alignment
#define ARG_STACK_A (((ARG_STACK + pushed + 7) & ~7) - pushed)
sub sp, sp, #ARG_STACK_A
.equ pos, 0
sub sp, sp, #ARG_STACK_A
.equ pos, 0
ldr r12, [sp, #ARG_STACK_A + pushed + 8 + pos]
str r12, [sp, #pos]
.equ pos, pos + 4
ldr r12, [sp, #ARG_STACK_A + pushed + 8 + pos]
str r12, [sp, #pos]
.equ pos, pos + 4