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| author | Henrik Gramner <henrik@gramner.com> | 2015-08-16 17:09:40 +0200 |
|---|---|---|
| committer | Henrik Gramner <henrik@gramner.com> | 2015-08-19 16:17:35 +0200 |
| commit | e6b8797b827ce3c5eb0608725db7e7e85d78864b (patch) | |
| tree | 824a2b095f35f431ae3dbe9b01845df8206f3745 /tests/checkasm/x86 | |
| parent | 18b101ff595c7f18e9571d26f8840f556b24ec03 (diff) | |
| download | ffmpeg-e6b8797b827ce3c5eb0608725db7e7e85d78864b.tar.gz | |
checkasm: x86: properly save rdx/edx in checked_call()
If the return value doesn't fit in a single register rdx/edx can in some
cases be used in addition to rax/eax.
Doesn't affect any of the existing checkasm tests but might be useful later.
Also comment the relevant code a bit better.
Diffstat (limited to 'tests/checkasm/x86')
| -rw-r--r-- | tests/checkasm/x86/checkasm.asm | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tests/checkasm/x86/checkasm.asm b/tests/checkasm/x86/checkasm.asm index 377fd373c0..da19aa2576 100644 --- a/tests/checkasm/x86/checkasm.asm +++ b/tests/checkasm/x86/checkasm.asm @@ -145,10 +145,15 @@ cglobal checked_call, 2,15,16,max_args*8+8 or r14, r5 %endif + ; Call fail_func() with a descriptive message to mark it as a failure + ; if the called function didn't preserve all callee-saved registers. + ; Save the return value located in rdx:rax first to prevent clobbering. jz .ok mov r9, rax + mov r10, rdx lea r0, [error_message] call fail_func + mov rdx, r10 mov rax, r9 .ok: RET @@ -182,9 +187,11 @@ cglobal checked_call, 1,7 or r3, r5 jz .ok mov r3, eax + mov r4, edx lea r0, [error_message] mov [esp], r0 call fail_func + mov edx, r4 mov eax, r3 .ok: add esp, max_args*4 |