On Friday, 30 September 2016 11:22:14 CEST, Martin Storsjö wrote:
---
tests/checkasm/aarch64/checkasm.S | 14 ++++++++++++++
tests/checkasm/checkasm.h | 6 +++++-
2 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/tests/checkasm/aarch64/checkasm.S
b/tests/checkasm/aarch64/checkasm.S
index 39e8337..a123ac1 100644
--- a/tests/checkasm/aarch64/checkasm.S
+++ b/tests/checkasm/aarch64/checkasm.S
@@ -52,6 +52,20 @@ endconst
// max number of args used by any asm function.
#define MAX_ARGS 15
+#define CLOBBER_STACK ((8*MAX_ARGS + 15) & ~15)
+
+function checkasm_stack_clobber, export=1
+ mov x29, sp
+ mov x1, #CLOBBER_STACK - 8
+ sub sp, sp, #CLOBBER_STACK
+1:
+ str x0, [sp, x1]
+ subs x1, x1, #8
this could clobber 16 bytes per loop, not important though. patch ok as is
+ b.ge 1b
+ mov sp, x29
+ ret
+endfunc
+
#define ARG_STACK ((8*(MAX_ARGS - 8) + 15) & ~15)
function checkasm_checked_call, export=1
diff --git a/tests/checkasm/checkasm.h b/tests/checkasm/checkasm.h
index 169aa2a..8d54cc7 100644
--- a/tests/checkasm/checkasm.h
+++ b/tests/checkasm/checkasm.h
@@ -133,9 +133,13 @@ extern void (*checkasm_checked_call)(void
*func, int dummy, ...);
#define declare_new(ret, ...) ret (*checked_call)(void *, int
dummy, __VA_ARGS__) = (void *)checkasm_checked_call;
#define call_new(...) checked_call(func_new, 0, __VA_ARGS__)
#elif ARCH_AARCH64 && !defined(__APPLE__)
+void checkasm_stack_clobber(uint64_t clobber, ...);
void checkasm_checked_call(void *func, ...);
#define declare_new(ret, ...) ret (*checked_call)(void *,
__VA_ARGS__) = (void *)checkasm_checked_call;
-#define call_new(...) checked_call(func_new, __VA_ARGS__)
+#define CLOB (UINT64_C(0xdeadbeefdeadbeef))
+#define call_new(...)
(checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
+
CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
Any reason why this uses 21 arguments? I would have expected 23 (8 +
MAX_ARGS)
Janne
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