Msg/ClobberedSP: Difference between revisions
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Created page with "A function should always ensure that the stack pointer is the same at the entry and exit of the function. This message tells you that this didn't happen: the stack pointer was..." |
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==== ARMv7 ==== | ==== ARMv7 ==== | ||
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.global _start | .global _start | ||
_start: | _start: | ||
Revision as of 23:18, 9 March 2019
A function should always ensure that the stack pointer is the same at the entry and exit of the function. This message tells you that this didn't happen: the stack pointer was different at the function return than when the function was first called.
Examples
ARMv7
.global _start
_start:
mov sp, #0x1000 // Initialize SP to something sane
bl MyFunction
nop
nop
# ...
MyFunction:
push {r4} // Changes SP
bx lr // Return, but SP is different
Disabling this message
This debugging check can be disabled in the Debugging Checks section of the Settings box: Function clobbered ra or sp.