2 // Copyright (c) 1999, 2000
4 // All rights reserved.
6 // Redistribution and use in source and binary forms, with or without
7 // modification, are permitted provided that the following conditions
10 // 1. Redistributions of source code must retain the above copyright
11 // notice, this list of conditions and the following disclaimer.
13 // 2. Redistributions in binary form must reproduce the above copyright
14 // notice, this list of conditions and the following disclaimer in the
15 // documentation and/or other materials provided with the distribution.
17 // 3. All advertising materials mentioning features or use of this software
18 // must display the following acknowledgement:
20 // This product includes software developed by Intel Corporation and
23 // 4. Neither the name of Intel Corporation or its contributors may be
24 // used to endorse or promote products derived from this software
25 // without specific prior written permission.
27 // THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''
28 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 // ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE
31 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
37 // THE POSSIBILITY OF SUCH DAMAGE.
48 // Contains an implementation of setjmp and longjmp for the
49 // IA-64 architecture.
53 #include <machine/asm.h>
54 __FBSDID("$FreeBSD$");
57 #include <machine/setjmp.h>
59 // int _setjmp(struct jmp_buffer *)
61 // Setup a non-local goto.
65 // SetJump stores the current register set in the area pointed to
66 // by "save". It returns zero. Subsequent calls to "LongJump" will
67 // restore the registers and return non-zero to the same location.
69 // On entry, r32 contains the pointer to the jmp_buffer
73 add r10 = J_PREDS, r32 // skip Unats & pfs save area
76 // save immediate context
78 mov r2 = ar.bsp // save backing store pointer
79 mov r3 = pr // save predicates
83 // save user Unat register
85 mov r16 = ar.lc // save loop count register
86 mov r14 = ar.unat // save user Unat register
88 st8 [r10] = r3, J_LC-J_PREDS
89 st8 [r11] = r2, J_R4-J_BSP
91 st8 [r10] = r16, J_R5-J_LC
92 st8 [r32] = r14, J_NATS // Note: Unat at the
93 // beginning of the save area
97 // save preserved general registers & NaT's
100 st8.spill [r11] = r4, J_R6-J_R4
102 st8.spill [r10] = r5, J_R7-J_R5
105 st8.spill [r11] = r6, J_SP-J_R6
107 st8.spill [r10] = r7, J_F3-J_R7
109 st8.spill [r11] = sp, J_F2-J_SP
113 // save spilled Unat and pfs registers
115 mov r2 = ar.unat // save Unat register after spill
118 st8 [r32] = r2, J_PFS-J_NATS // save unat for spilled regs
121 st8 [r32] = r15, J_RNAT-J_PFS // save pfs
124 // save floating registers
126 stf.spill [r11] = f2, J_F4-J_F2
127 stf.spill [r10] = f3, J_F5-J_F3
129 stf.spill [r11] = f4, J_F16-J_F4
130 stf.spill [r10] = f5, J_F17-J_F5
132 stf.spill [r11] = f16, J_F18-J_F16
133 stf.spill [r10] = f17, J_F19-J_F17
135 stf.spill [r11] = f18, J_F20-J_F18
136 stf.spill [r10] = f19, J_F21-J_F19
138 stf.spill [r11] = f20, J_F22-J_F20
139 stf.spill [r10] = f21, J_F23-J_F21
141 stf.spill [r11] = f22, J_F24-J_F22
142 stf.spill [r10] = f23, J_F25-J_F23
144 stf.spill [r11] = f24, J_F26-J_F24
145 stf.spill [r10] = f25, J_F27-J_F25
147 stf.spill [r11] = f26, J_F28-J_F26
148 stf.spill [r10] = f27, J_F29-J_F27
150 stf.spill [r11] = f28, J_F30-J_F28
151 stf.spill [r10] = f29, J_F31-J_F29
153 stf.spill [r11] = f30, J_FPSR-J_F30
154 stf.spill [r10] = f31, J_B0-J_F31 // size of f31 + fpsr
158 // save FPSR register & branch registers
160 mov r2 = ar.fpsr // save fpsr register
163 st8 [r11] = r2, J_B1-J_FPSR
164 st8 [r10] = r3, J_B2-J_B0
168 st8 [r11] = r2, J_B3-J_B1
169 st8 [r10] = r3, J_B4-J_B2
173 st8 [r11] = r2, J_B5-J_B3
182 mov r8 = r0 // return 0 from setjmp
183 mov ar.unat = r14 // restore unat
190 // void _longjmp(struct jmp_buffer *, int val)
192 // Perform a non-local goto.
196 // LongJump initializes the register set to the values saved by a
197 // previous 'SetJump' and jumps to the return location saved by that
198 // 'SetJump'. This has the effect of unwinding the stack and returning
199 // for a second time to the 'SetJump'.
202 WEAK_ALIAS(_longjmp,___longjmp)
204 mov r14 = ar.rsc // get user RSC conf
205 mov r8 = r33 // return value
206 add r10 = J_PFS, r32 // get address of pfs
209 add r11 = J_NATS, r32
210 add r17 = J_RNAT, r32
212 ld8 r15 = [r10], J_BSP-J_PFS // get pfs
213 ld8 r2 = [r11], J_LC-J_NATS // get unat for spilled regs
218 cmp.eq p6,p0=0,r8 // Return value 0?
220 ld8 r16 = [r10], J_PREDS-J_BSP // get backing store pointer
221 ld8 r17 = [r17] // ar.rnat
224 mov ar.bspstore = r16
228 mov ar.rsc = r14 // restore RSC conf
230 ld8 r3 = [r11], J_R4-J_LC // get lc register
231 ld8 r2 = [r10], J_R5-J_PREDS // get predicates
236 // restore preserved general registers & NaT's
238 ld8.fill r4 = [r11], J_R6-J_R4
240 ld8.fill r5 = [r10], J_R7-J_R5
241 ld8.fill r6 = [r11], J_SP-J_R6
243 ld8.fill r7 = [r10], J_F2-J_R7
244 ld8.fill sp = [r11], J_F3-J_SP
247 // restore floating registers
249 ldf.fill f2 = [r10], J_F4-J_F2
250 ldf.fill f3 = [r11], J_F5-J_F3
252 ldf.fill f4 = [r10], J_F16-J_F4
253 ldf.fill f5 = [r11], J_F17-J_F5
255 ldf.fill f16 = [r10], J_F18-J_F16
256 ldf.fill f17 = [r11], J_F19-J_F17
258 ldf.fill f18 = [r10], J_F20-J_F18
259 ldf.fill f19 = [r11], J_F21-J_F19
261 ldf.fill f20 = [r10], J_F22-J_F20
262 ldf.fill f21 = [r11], J_F23-J_F21
264 ldf.fill f22 = [r10], J_F24-J_F22
265 ldf.fill f23 = [r11], J_F25-J_F23
267 ldf.fill f24 = [r10], J_F26-J_F24
268 ldf.fill f25 = [r11], J_F27-J_F25
270 ldf.fill f26 = [r10], J_F28-J_F26
271 ldf.fill f27 = [r11], J_F29-J_F27
273 ldf.fill f28 = [r10], J_F30-J_F28
274 ldf.fill f29 = [r11], J_F31-J_F29
276 ldf.fill f30 = [r10], J_FPSR-J_F30
277 ldf.fill f31 = [r11], J_B0-J_F31 ;;
280 // restore branch registers and fpsr
282 ld8 r16 = [r10], J_B1-J_FPSR // get fpsr
283 ld8 r17 = [r11], J_B2-J_B0 // get return pointer
287 ld8 r2 = [r10], J_B3-J_B1
288 ld8 r3 = [r11], J_B4-J_B2
292 ld8 r2 = [r10], J_B5-J_B3
298 ld8 r21 = [r31] // get user unat