har0ke/FFmpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge commit 'f1b3e131385176c3c9d9783b25047856a0dcebf6'

Browse Source 
* commit 'f1b3e131385176c3c9d9783b25047856a0dcebf6':
  checkasm: aarch64: Clobber the stack before calling functions

Merged-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2017-03-23 17:36:53 -03:00
commit a2d34cc51b
2 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -139,9 +139,13 @@ 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, ...)