lfn
serial
ticket/834-toolchain-update
topic/msim-upgrade
topic/simplify-dev-export
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Last change
on this file since 6037308 was a7de7182, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 14 years ago |
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Added pcc source tree (contents of pcc-1.0.0.tgz)
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Property mode
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100644
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File size:
727 bytes
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| 1 |
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| 2 |
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| 3 | PDP10 C calling convention
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| 4 | --------------------------
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| 5 | Register 1-7 are argument registers. Types of sizes up to 36 bits are
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| 6 | given in one register, two otherwise. CHAR and SHORT are given as INTs.
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| 7 |
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| 8 | If the argument that would end up in register 7 requires two registers,
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| 9 | it is saved on the stack instead and no more registers would end up
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| 10 | on the stack.
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| 11 |
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| 12 | struct return: a hidden argument containing the address of the struct
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| 13 | is stored as the first argument _on_the_stack_, never in register.
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| 14 |
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| 15 | struct argument: always saved on stack, and terminates the list
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| 16 | of arguments that are kept in registers.
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| 17 |
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| 18 | In case of debugging all arguments are saved on stack in the function.
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| 19 |
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| 20 | All variadic arguments are always saved on the stack.
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