diff options
Diffstat (limited to 'src/internal/superh')
| -rw-r--r-- | src/internal/superh/syscall.s | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/internal/superh/syscall.s b/src/internal/superh/syscall.s new file mode 100644 index 00000000..a8fda1c0 --- /dev/null +++ b/src/internal/superh/syscall.s @@ -0,0 +1,22 @@ +.global __syscall +.type __syscall, @function +__syscall: + ! The kernel syscall entry point documents that the trap number indicates + ! the number of arguments being passed, but it then ignores that information. + ! Since we do not actually know how many arguments are being passed, we will + ! say there are six, since that is the maximum we support here. + mov r4, r3 + mov r5, r4 + mov r6, r5 + mov r7, r6 + mov.l @r15, r7 + mov.l @(4,r15), r0 + mov.l @(8,r15), r1 + trapa #22 + or r0, r0 + or r0, r0 + or r0, r0 + or r0, r0 + or r0, r0 + rts + nop |