/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
; and the savearea/pcb as the first parameter.
; It is up to the callee to enable interruptions if
; they should be. We are in a state here where
-; both interrupts and preemption is ok, but because we could
+; both interrupts and preemption are ok, but because we could
; be calling diagnostic code we will not enable.
;
; Also, the callee is responsible for finding any parameters
*/
ksystrace:
- mr r4,r30 ; Pass in saved state
+ mr r4,r30 ; Pass in saved state
bl EXT(syscall_trace)
- cmplw r31,r29 ; Is this syscall in the table?
- add r31,r27,r28 ; Point right to the syscall table entry
+ cmplw r31,r29 ; Is this syscall in the table?
+ add r31,r27,r28 ; Point right to the syscall table entry
bge- .L_call_server_syscall_exception ; The syscall number is invalid
.L_ksystrace_munge:
cmplwi r0,0 ; do we have a munger to call?
- mtctr r0 ; Set the function call address
- addi r3,r30,saver3 ; Pointer to args from save area
- addi r4,r1,FM_ARG0+ARG_SIZE ; Pointer for munged args
+ mtctr r0 ; Set the function call address
+ addi r3,r30,saver3 ; Pointer to args from save area
+ addi r4,r1,FM_ARG0+ARG_SIZE ; Pointer for munged args
beq-- .L_ksystrace_trapcall ; just make the trap call
- bctrl ; Call the munge function
+ bctrl ; Call the munge function
.L_ksystrace_trapcall:
- lwz r0,MACH_TRAP_FUNCTION(r31) ; Pick up the function address
- mtctr r0 ; Set the function call address
- addi r3,r1,FM_ARG0+ARG_SIZE ; Pointer to munged args
+ lwz r0,MACH_TRAP_FUNCTION(r31) ; Pick up the function address
+ mtctr r0 ; Set the function call address
+ addi r3,r1,FM_ARG0+ARG_SIZE ; Pointer to munged args
bctrl
- mr r4,r30 ; Pass in the savearea
- bl EXT(syscall_trace_end) ; Trace the exit of the system call
+ mr r4,r30 ; Pass in the savearea
+ bl EXT(syscall_trace_end) ; Trace the exit of the system call
b .L_mach_return
; Call a function that can print out our syscall info
; Note that we don t care about any volatiles yet
;
- lwz r10,ACT_TASK(r13) ; Get our task
+ lwz r10,ACT_TASK(r13) ; Get our task
lwz r0,saver0+4(r30)
- lis r8,hi16(EXT(kdebug_enable)) ; Get top of kdebug_enable
+ lis r8,hi16(EXT(kdebug_enable)) ; Get top of kdebug_enable
lis r28,hi16(EXT(mach_trap_table)) ; Get address of table
ori r8,r8,lo16(EXT(kdebug_enable)) ; Get bottom of kdebug_enable
- lwz r8,0(r8) ; Get kdebug_enable
+ lwz r8,0(r8) ; Get kdebug_enable
- lwz r7,TASK_SYSCALLS_MACH(r10) ; Get the current count
- neg r31,r0 ; Make this positive
- mr r3,r31 ; save it
- slwi r27,r3,4 ; multiply by 16
- slwi r3,r3,2 ; and the original by 4
+ lwz r7,TASK_SYSCALLS_MACH(r10) ; Get the current count
+ neg r31,r0 ; Make this positive
+ mr r3,r31 ; save it
+ slwi r27,r3,4 ; multiply by 16
+ slwi r3,r3,2 ; and the original by 4
ori r28,r28,lo16(EXT(mach_trap_table)) ; Get address of table
- add r27,r27,r3 ; for a total of 20x (5 words/entry)
- addi r7,r7,1 ; Bump TASK_SYSCALLS_MACH count
- cmplwi r8,0 ; Is kdebug_enable non-zero
- stw r7,TASK_SYSCALLS_MACH(r10) ; Save count
- bne-- ksystrace ; yes, tracing enabled
+ add r27,r27,r3 ; for a total of 20x (5 words/entry)
+ addi r7,r7,1 ; Bump TASK_SYSCALLS_MACH count
+ cmplwi r8,0 ; Is kdebug_enable non-zero
+ stw r7,TASK_SYSCALLS_MACH(r10) ; Save count
+ bne-- ksystrace ; yes, tracing enabled
- cmplwi r31,MACH_TRAP_TABLE_COUNT ; Is this syscall in the table?
- add r31,r27,r28 ; Point right to the syscall table entry
+ cmplwi r31,MACH_TRAP_TABLE_COUNT ; Is this syscall in the table?
+ add r31,r27,r28 ; Point right to the syscall table entry
bge-- .L_call_server_syscall_exception ; The syscall number is invalid
.L_kernel_syscall_munge:
cmplwi r0,0 ; test for null munger
mtctr r0 ; Set the function call address
- addi r3,r30,saver3 ; Pointer to args from save area
- addi r4,r1,FM_ARG0+ARG_SIZE ; Pointer for munged args
- beq-- .L_kernel_syscall_trapcall ; null munger - skip to trap call
- bctrl ; Call the munge function
+ addi r3,r30,saver3 ; Pointer to args from save area
+ addi r4,r1,FM_ARG0+ARG_SIZE ; Pointer for munged args
+ beq-- .L_kernel_syscall_trapcall ; null munger - skip to trap call
+ bctrl ; Call the munge function
.L_kernel_syscall_trapcall:
- lwz r0,MACH_TRAP_FUNCTION(r31) ; Pick up the function address
- mtctr r0 ; Set the function call address
- addi r3,r1,FM_ARG0+ARG_SIZE ; Pointer to munged args
+ lwz r0,MACH_TRAP_FUNCTION(r31) ; Pick up the function address
+ mtctr r0 ; Set the function call address
+ addi r3,r1,FM_ARG0+ARG_SIZE ; Pointer to munged args
#if FPFLOOD
stfd f31,emfp31(r25) ; (TEST/DEBUG)
*/
.L_mach_return:
- srawi r0,r3,31 ; properly extend the return code
- cmpi cr0,r3,KERN_INVALID_ARGUMENT ; deal with invalid system calls
- mr r31,r16 ; Move the current thread pointer
- stw r0, saver3(r30) ; stash the high part of the return code
- stw r3,saver3+4(r30) ; Stash the low part of the return code
- beq- cr0,.L_mach_invalid_ret ; otherwise fall through into the normal return path
+ srawi r0,r3,31 ; properly extend the return code
+ cmpi cr0,r3,KERN_INVALID_ARGUMENT ; deal with invalid system calls
+ mr r31,r16 ; Move the current thread pointer
+ stw r0, saver3(r30) ; stash the high part of the return code
+ stw r3,saver3+4(r30) ; Stash the low part of the return code
+ beq-- cr0,.L_mach_invalid_ret ; otherwise fall through into the normal return path
.L_mach_invalid_arg:
* we want to pass the error code back to the caller
*/
lwz r0,saver0+4(r30) ; reload the original syscall number
- neg r28,r0 ; Make this positive
- mr r4,r28 ; save a copy
- slwi r27,r4,4 ; multiply by 16
- slwi r4,r4,2 ; and another 4
+ neg r28,r0 ; Make this positive
+ mr r4,r28 ; save a copy
+ slwi r27,r4,4 ; multiply by 16
+ slwi r4,r4,2 ; and another 4
lis r28,hi16(EXT(mach_trap_table)) ; Get address of table
- add r27,r27,r4 ; for a total of 20x (5 words/entry)
+ add r27,r27,r4 ; for a total of 20x (5 words/entry)
ori r28,r28,lo16(EXT(mach_trap_table)) ; Get address of table
add r28,r27,r28 ; Point right to the syscall table entry
lwz r27,MACH_TRAP_FUNCTION(r28) ; Pick up the function address
mr r4,r30
lwz r5,savedsisr(r30) ; Get the DSISR
lwz r6,savedar+4(r30) ; Get the DAR
-
+
#if FPFLOOD
stfd f31,emfp31(r25) ; (TEST/DEBUG)
#endif
lwz r10,ACT_PER_PROC(r8) ; Get the per_proc block
lwz r7,SAVflags(r3) ; Pick up the flags
- lwz r9,SAVprev+4(r3) ; Get previous save area
+ lwz r9,SAVprev+4(r3) ; Get previous save area
cmplwi cr1,r8,0 ; Are we still initializing?
lwz r12,savesrr1+4(r3) ; Get the MSR we will load on return
andis. r11,r7,hi16(SAVrststk) ; Is this the first on the stack?
projects / apple / xnu.git / blobdiff