libc: arm: setjmp jmp_buf exagerated size
Tue Feb 14 22:47:23 GMT 2023
using setjmp to implement eight coroutines on an ARM Cortex-M0+ the allocated size of .data escalates, in my example, from 476 bytes to 1444 bytes!
I think "libc: arm: fix setjmp abi non-conformance" shouldn't use jmp_buf made of 20 long long ints on a 32bit arm without fpu :D
Can the #ifndef device detection/decision tree from the setjmp asm/source file be also used in the headers to set reasonable sizes?
For my machine and use-case gcc emits asm copying ten registers (as expected) which would be rightly sized.
Thanks for your work and consideration :)
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