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Tamar Christina
430b529111
Fix AArch32 semihosting SYS_EXIT call on semihosting v1.
The current SYS_EXIT has a bug that when making the call it always uses the v2 calling convention. This is undefined behavior according to the semihosting specification: https://developer.arm.com/docs/100863/latest/semihosting-operations/sys_exit-0x18 This patch fixes it by making sure v1 passes the argument directly in the register instead of in a block. And for v2 it does the same if the v2 extension isn't supported. The sequence generated now is 12424: ebfffecd bl 11f60 <_has_ext_exit_extended> 12428: e3500000 cmp r0, #0 1242c: 11a0500d movne r5, sp 12430: 059d5000 ldreq r5, [sp] 12434: e1a00004 mov r0, r4 12438: e1a01005 mov r1, r5 1243c: ef00f000 svc 0x0000f000 Signed-off-by: Tamar Christina <tamar.christina@arm.com>
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