STACK_GROWS_DOWNWARD
-
Define this macro if pushing a word onto the stack moves the stack
pointer to a smaller address.
When we say, ``define this macro if ...,'' it means that the
compiler checks this macro only with #ifdef so the precise
definition used does not matter.
FRAME_GROWS_DOWNWARD
-
Define this macro if the addresses of local variable slots are at negative
offsets from the frame pointer.
ARGS_GROW_DOWNWARD
-
Define this macro if successive arguments to a function occupy decreasing
addresses on the stack.
STARTING_FRAME_OFFSET
-
Offset from the frame pointer to the first local variable slot to be allocated.
If FRAME_GROWS_DOWNWARD, find the next slot's offset by
subtracting the first slot's length from STARTING_FRAME_OFFSET.
Otherwise, it is found by adding the length of the first slot to the
value STARTING_FRAME_OFFSET.
STACK_POINTER_OFFSET
-
Offset from the stack pointer register to the first location at which
outgoing arguments are placed. If not specified, the default value of
zero is used. This is the proper value for most machines.
If ARGS_GROW_DOWNWARD, this is the offset to the location above
the first location at which outgoing arguments are placed.
FIRST_PARM_OFFSET (fundecl)
-
Offset from the argument pointer register to the first argument's
address. On some machines it may depend on the data type of the
function.
If ARGS_GROW_DOWNWARD, this is the offset to the location above
the first argument's address.
STACK_DYNAMIC_OFFSET (fundecl)
-
Offset from the stack pointer register to an item dynamically allocated
on the stack, e.g., by
alloca.
The default value for this macro is STACK_POINTER_OFFSET plus the
length of the outgoing arguments. The default is correct for most
machines. See `function.c' for details.
DYNAMIC_CHAIN_ADDRESS (frameaddr)
-
A C expression whose value is RTL representing the address in a stack
frame where the pointer to the caller's frame is stored. Assume that
frameaddr is an RTL expression for the address of the stack frame
itself.
If you don't define this macro, the default is to return the value
of frameaddr---that is, the stack frame address is also the
address of the stack word that points to the previous frame.
SERTUP_FRAME_ADDRESSES ()
-
If defined, a C expression that produces the machine-specific code to
setup the stack so that arbitrary frames can be accessed. For example,
on the Sparc, we must flush all of the register windows to the stack
before we can access arbitrary stack frames.
This macro will seldom need to be defined.
RETURN_ADDR_RTX (count, frameaddr)
-
A C expression whose value is RTL representing the value of the return
address for the frame count steps up from the current frame.
frameaddr is the frame pointer of the count frame, or
the frame pointer of the count - 1 frame if
RETURN_ADDR_IN_PREVIOUS_FRAME is defined.
RETURN_ADDR_IN_PREVIOUS_FRAME
-
Define this if the return address of a particular stack frame is accessed
from the frame pointer of the previous stack frame.
Using and Porting GNU CC