75 lines
2.6 KiB
Plaintext
75 lines
2.6 KiB
Plaintext
$NetBSD: README.mach-traps,v 1.3 2001/06/04 20:06:41 nathanw Exp $
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Some Alpha AXP OSF/1 binaries directly use the facilities provided by
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the Mach kernel that is the basis for OSF/1. These include (but are
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surely not limited to) 'dd', 'ps', and 'w'.
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Invariably, the symptom that these binaries display is that they crash
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with an "unimplemented system call" trap (SIGSYS signal) for a syscall
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that has a negative number. In general, binaries that use the Mach
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syscalls appear to invoke task_self() as their first syscall.
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Note that system call numbers are now range-bounded by masking off the
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high bits, so negative system call numbers will appear in the high
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end of the system call number range, thanks to the wonders of two's
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compliment arithmetic. System call -10, for example, will appear as
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"CALL [502]" in kdump output.
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The name, number, and number of arguments for each Mach syscall is
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given below; this information was gleaned by looking through the OSF/1
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libmach.a's object files with dbx, then double-checked against the
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contents of OSF/1's <mach/syscall_sw.h>.
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These calls would be very difficult to implement properly in the
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OSF/1 emulation code; by its very nature, NetBSD is not Mach, and we
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don't and can't provide the underlying facilities that it does.
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-- cgd
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trap name number nargs notes
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---- ---- ------ ----- -----
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task_self -10 0
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thread_reply -11 0
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task_notify -12 0
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thread_self -13 0
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msg_send_old -14 3
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msg_receive_old -15 3
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msg_rpc_old -16 5
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msg_send_trap -20 4
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msg_receive_trap -21 5
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msg_rpc_trap -22 6
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lw_wire -30 3
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lw_unwire -31 1
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nxm_task_init -33 2
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nxm_sched_thread -34 1
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nxm_idle -35 1
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nxm_wakeup_idle -36 1
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nxm_set_pthid -37 2
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nxm_thread_kill -38 2
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nxm_thread_block -39 1
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nxm_thread_wakeup -40 1
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inode_swap_preference -40 3 old call?
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init_process -41 0
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map_fd -43 5
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nxm_resched -44 2
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htg_unix_syscall -52 3
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host_self -55 1
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host_priv_self -56 1
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swtch_pri -59 1
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swtch -60 0
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thread_switch -61 3
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semop_fast -62 4
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mach_sctimes_0 -70 0 only if MACH_SCTIMES defined
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mach_sctimes_1 -71 1 only if MACH_SCTIMES defined
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mach_sctimes_2 -72 2 only if MACH_SCTIMES defined
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mach_sctimes_3 -73 3 only if MACH_SCTIMES defined
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mach_sctimes_4 -74 4 only if MACH_SCTIMES defined
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mach_sctimes_5 -75 5 only if MACH_SCTIMES defined
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mach_sctimes_6 -76 6 only if MACH_SCTIMES defined
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mach_sctimes_7 -77 0 only if MACH_SCTIMES defined
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mach_sctimes_8 -78 6 only if MACH_SCTIMES defined
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mach_sctimes_9 -79 1 only if MACH_SCTIMES defined
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mach_sctimes_10 -80 2 only if MACH_SCTIMES defined
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mach_sctimes_11 -81 2 only if MACH_SCTIMES defined
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mach_sctimes_port_alloc_dealloc -82 1 only if MACH_SCTIMES defined
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