The System V ABI on x86-64 specifies that the al register contains an upper
bound of the number of arguments passed in vector registers when calling
variadic functions, so we aren't allowed to clobber it.
checkasm_fail_func() is a variadic function so also zero al before calling it.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
%if WIN64
%assign free_regs 7
+ DECLARE_REG_TMP 4
%else
%assign free_regs 9
+ DECLARE_REG_TMP 7
%endif
;-----------------------------------------------------------------------------
;-----------------------------------------------------------------------------
INIT_XMM
cglobal checked_call, 2,15,16,max_args*8+8
- mov r6, r0
+ mov t0, r0
; All arguments have been pushed on the stack instead of registers in order to
; test for incorrect assumptions that 32-bit ints are zero-extended to 64-bit.
mov r %+ i, [n %+ i]
%assign i i-1
%endrep
- call r6
+ call t0
%assign i 14
%rep 15-free_regs
xor r %+ i, [n %+ i]
mov r9, rax
mov r10, rdx
lea r0, [error_message]
+ xor eax, eax
call fail_func
mov rdx, r10
mov rax, r9