C calling convention

[John Dallman]

The source I'm porting to NDK has a fairly sophisticated text formatter,
which is basically a printf that can be extended with custom functions at
run-time. It needs to understand the C calling convention for the platform.

Does Android on ARM use the standard ARM Ltd calling conventions for 32-bit
and 64-bit?

Our only existing ARM platform is iOS, which uses standard the ARM
convention for 32-bit. 64-bit iOS uses a simplified version of the ARM
convention, which is quite different for variadic functions. If Android is
to ARM standards, I'll have to implement that.

Thanks,

John

[J Decker]

varadic arguments should always be used through va_arg in stdarg.h

Post by John Dallman
The source I'm porting to NDK has a fairly sophisticated text formatter,
which is basically a printf that can be extended with custom functions at
run-time. It needs to understand the C calling convention for the platform.
Does Android on ARM use the standard ARM Ltd calling conventions for
32-bit and 64-bit?
Our only existing ARM platform is iOS, which uses standard the ARM
convention for 32-bit. 64-bit iOS uses a simplified version of the ARM
convention, which is quite different for variadic functions. If Android is
to ARM standards, I'll have to implement that.
Thanks,
John
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[John Dallman]

va_arg, sadly, is not enough to cope with our needs. We use it, but we
normally have to read the calling convention documentation, and implement
parts of it.

I'm just looking for confirmation that Android uses the ARM standard
calling convention. This is for C-to-C calls, not JNI.

Thanks,

John

Post by J Decker
varadic arguments should always be used through va_arg in stdarg.h

Post by John Dallman
The source I'm porting to NDK has a fairly sophisticated text formatter,
which is basically a printf that can be extended with custom functions at
run-time. It needs to understand the C calling convention for the platform.
Does Android on ARM use the standard ARM Ltd calling conventions for
32-bit and 64-bit?
Our only existing ARM platform is iOS, which uses standard the ARM
convention for 32-bit. 64-bit iOS uses a simplified version of the ARM
convention, which is quite different for variadic functions. If Android is
to ARM standards, I'll have to implement that.
Thanks,
John
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[Glenn Kasten]

I think it uses the default relevant ABI of gcc and clang. But this is not
a "confirmation", just an assumption.

Post by John Dallman
va_arg, sadly, is not enough to cope with our needs. We use it, but we
normally have to read the calling convention documentation, and implement
parts of it.
I'm just looking for confirmation that Android uses the ARM standard
calling convention. This is for C-to-C calls, not JNI.
Thanks,
John

Post by J Decker
varadic arguments should always be used through va_arg in stdarg.h

Post by John Dallman
The source I'm porting to NDK has a fairly sophisticated text formatter,
which is basically a printf that can be extended with custom functions at
run-time. It needs to understand the C calling convention for the platform.
Does Android on ARM use the standard ARM Ltd calling conventions for
32-bit and 64-bit?
Our only existing ARM platform is iOS, which uses standard the ARM
convention for 32-bit. 64-bit iOS uses a simplified version of the ARM
convention, which is quite different for variadic functions. If Android is
to ARM standards, I'll have to implement that.
Thanks,
John
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