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Exception vectors: Remove no-op syscallhandler

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This commit is contained in:
Angus Gratton 2015-09-14 18:17:45 +10:00
parent 0e0c5d89b8
commit 259c9b643f
1 changed files with 0 additions and 17 deletions
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17
core/exception_vectors.S
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@ -57,7 +57,6 @@ KernelExceptionVector:
UserExceptionVector: UserExceptionVector:
wsr.excsave1 a0 wsr.excsave1 a0
rsr.exccause a0 rsr.exccause a0
beqi a0, CAUSE_SYSCALL, UserSyscallHandler
beqi a0, CAUSE_LOADSTORE, UserExceptionLoadStoreHandler beqi a0, CAUSE_LOADSTORE, UserExceptionLoadStoreHandler
j UserExceptionHandler j UserExceptionHandler
@ -224,22 +223,6 @@ UserIntDone:
UserIntExit: UserIntExit:
call0 sdk__xt_int_exit /* calls rfi */ call0 sdk__xt_int_exit /* calls rfi */
/* As far as I can tell, the syscall handler is basically a no-op */
UserSyscallHandler:
addi sp, sp, -0x10
s32i a2, sp, 0x08
s32i a3, sp, 0x0c
rsr.epc1 a2
addi a3, a2, 0x3
wsr.epc1 a3
l32i a2, sp, 0x8
l32i a3, sp, 0xc
addi sp, sp, 0x10
movi a0, 0x7f
movnez a2, a0, a2
rsr.excsave1 a0
rfe
.text .text
.section .vecbase.text .section .vecbase.text
.literal_position .literal_position