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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2005 Ondrej Palkovsky |
2 | * Copyright (C) 2005 Ondrej Palkovsky |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
| 14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | #include <proc/scheduler.h> |
29 | #include <proc/scheduler.h> |
| 30 | #include <cpu.h> |
30 | #include <cpu.h> |
| 31 | #include <proc/thread.h> |
31 | #include <proc/thread.h> |
| 32 | #include <arch.h> |
32 | #include <arch.h> |
| 33 | #include <arch/context.h> /* SP_DELTA */ |
33 | #include <arch/context.h> /* SP_DELTA */ |
| 34 | #include <arch/asm.h> |
34 | #include <arch/asm.h> |
| 35 | #include <arch/debugger.h> |
35 | #include <arch/debugger.h> |
| 36 | - | ||
| 37 | #include <print.h> |
36 | #include <print.h> |
| - | 37 | ||
| 38 | void before_thread_runs_arch(void) |
38 | void before_thread_runs_arch(void) |
| 39 | { |
39 | { |
| 40 | CPU->arch.tss->rsp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
40 | CPU->arch.tss->rsp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA]; |
| 41 | 41 | ||
| 42 | /* Syscall support - write thread stack address to hidden part of gs */ |
42 | /* Syscall support - write thread stack address to hidden part of gs */ |
| 43 | swapgs(); |
43 | swapgs(); |
| 44 | write_msr(AMD_MSR_GS, |
44 | write_msr(AMD_MSR_GS, |
| 45 | (__u64)&THREAD->kstack); |
45 | (__u64)&THREAD->kstack); |
| 46 | swapgs(); |
46 | swapgs(); |
| 47 | 47 | ||
| 48 | #ifdef CONFIG_DEBUG_AS_WATCHPOINT |
48 | #ifdef CONFIG_DEBUG_AS_WATCHPOINT |
| 49 | /* Set watchpoint on AS to ensure that nobody sets it to zero */ |
49 | /* Set watchpoint on AS to ensure that nobody sets it to zero */ |
| 50 | if (CPU->id < BKPOINTS_MAX) |
50 | if (CPU->id < BKPOINTS_MAX) |
| 51 | breakpoint_add(&((the_t *) THREAD->kstack)->as, |
51 | breakpoint_add(&((the_t *) THREAD->kstack)->as, |
| 52 | BKPOINT_WRITE | BKPOINT_CHECK_ZERO, |
52 | BKPOINT_WRITE | BKPOINT_CHECK_ZERO, |
| 53 | CPU->id); |
53 | CPU->id); |
| 54 | #endif |
54 | #endif |
| 55 | } |
55 | } |
| 56 | 56 | ||
| 57 | void after_thread_ran_arch(void) |
57 | void after_thread_ran_arch(void) |
| 58 | { |
58 | { |
| 59 | } |
59 | } |
| 60 | 60 | ||