28 lines
1.2 KiB
Markdown
28 lines
1.2 KiB
Markdown
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- The order in which atomic (scalar) parameters, or individual parts of a complex parameter, are allocated
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- How parameters are passed
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- Pushed on the stack, placed in registers, or a mix of both
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- Which registers the called function must preserve for the caller
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- Also known as: callee-saved registers or non-volatile registers
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- How the task of preparing the stack for, and restoring after, a function call is divided between the caller and the callee
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Subtle differences between compilers, can be difficult to interface codes from different compilers
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Calling conventions, type representations, and name mangling are all part of what is known as an [application binary interface](https://en.wikipedia.org/wiki/Application_binary_interface) ([[ABI]])
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# cdecl
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C declaration
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- Originally from Microsoft's C compiler
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- Used by many C compilers for x86
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- Subroutine arguments passed on the stack
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- Function arguments pushed right-to-left
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- Last pushed first
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- Caller cleans stack after function call returns
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# stdcall
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- Variation on Pascal calling convention
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- Callee cleans stack
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- Params pushed onto stack right-to-left
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- Same as _cdecl_
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- Standard for Microsoft Win32 API
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