riscv/musl - musl - Gitea: Git with a cup of tea

History

Rich Felker 10d0268ccf switch to using trap number 31 for syscalls on sh nominally the low bits of the trap number on sh are the number of syscall arguments, but they have never been used by the kernel, and some code making syscalls does not even know the number of arguments and needs to pass an arbitrary high number anyway. sh3/sh4 traditionally used the trap range 16-31 for syscalls, but part of this range overlapped with hardware exceptions/interrupts on sh2 hardware, so an incompatible range 32-47 was chosen for sh2. using trap number 31 everywhere, since it's in the existing sh3/sh4 range and does not conflict with sh2 hardware, is a proposed unification of the kernel syscall convention that will allow binaries to be shared between sh2 and sh3/sh4. if this is not accepted into the kernel, we can refit the sh2 target with runtime selection mechanisms for the trap number, but doing so would be invasive and would entail non-trivial overhead.		11 years ago
..
bits	fix sh jmp_buf size to match ABI	11 years ago
src	switch sh port's __unmapself to generic version when running on sh2/nommu	11 years ago
atomic.h	inline llsc atomics when building for sh4a	11 years ago
crt_arch.h	add .text section directive to all crt_arch.h files missing it	11 years ago
pthread_arch.h	rename superh port to "sh" for consistency	12 years ago
reloc.h	fix ldso name for sh-nofpu subarch	11 years ago
syscall_arch.h	switch to using trap number 31 for syscalls on sh	11 years ago