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checkasm: aarch64: Clobber the stack before calling functions 

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2016-09-30 11:39:22 +03:00
parent a05cc56124
commit f1b3e13138
2 changed files with 18 additions and 1 deletions
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13
tests/checkasm/aarch64/checkasm.S
View File

@ -52,6 +52,19 @@ 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 x2, #CLOBBER_STACK
1:
stp x0, x1, [sp, #-16]!
subs x2, x2, #16
b.gt 1b
mov sp, x29
ret
endfunc
#define ARG_STACK ((8*(MAX_ARGS - 8) + 15) & ~15)
function checkasm_checked_call, export=1

6
tests/checkasm/checkasm.h
View File

@ -134,9 +134,13 @@ 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,CLOB,CLOB),\
checked_call(func_new, __VA_ARGS__))
#else
#define declare_new(ret, ...)
#define declare_new_emms(cpu_flags, ret, ...)