Topic       : C-Language Documentation
Author      : John Kormylo
Version     : C.HYP 1.0
Subject     : Documentation/C-Language
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Index Size  : 6362
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Compiled on : Atari
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@lang       : en
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View Ref-File[ the stack ]

PCSTART reserves a section of RAM and sets register A7 (the stack
pointer) to point to the top of it.  Data is pushed onto the stack
by pre-decrementing the stack pointer by the appropriate amount and
writing to that address.  Data is popped off the stack by reading from
that address then incrementing the stack pointer again.

All function calls store the return address on the stack.

Some function arguments are passed on the stack.

Local variables are allocated from the stack (except when Pure_C
implements them as register variables).

Registers are often saved to the stack.

Unless you request stack checking (Compiler Options -T), the stack can
easily overflow into your global data area (BSS segment).

See also SP.