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abi

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julianb0 2019-07-15 20:47:44 +02:00
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@ -73,7 +73,7 @@ Aside from the DF flag, a function cannot assume anything about the state
of the flags in the FLG register.
Passing parameters is done using the following registers, in that order:
a0-a15
a0-a7
The stack is never used for argument passing, except for variadic functions,
cf the next section. If you need to pass large structures of data, pass
@ -85,10 +85,10 @@ and require more registers, use the following registers, in that order:
The following registers are volatile; the calling function cannot assume
that they will be left unmodified by the called function:
rax, rcx, rdx, r8-r15, a0-a15
rax, rcx, rdx, r8-r15, a0-a7
The following registers are nonvolatile; the called function must preserve them:
rbx, rsi, rdi, n0-n15, rbp, rsp
rbx, rsi, rdi, n0-n7, rbp, rsp
#------------------------------------------------------------------------------#
@ -125,12 +125,7 @@ The 'inv' register cannot be referenced by machine code except when specified
as an offset register in the [reg+reg(*/+...)] memory formats; in these case,
'inv' can be assumed to be always null.
The following registers can only be used by the supervisor:
- Fast global variables for the supervisor:
sa0-sa3
The following registers cannot be referenced by machine code at all:
px0-px1, fc0-fc2, cr0-cr3
(TO BE COMPLETED)
#------------------------------------------------------------------------------#