[ceph.git] / ceph / src / boost / libs / context / src / asm / jump_ppc64_sysv_macho_gas.S

/*
            Copyright Oliver Kowalke 2009.
   Distributed under the Boost Software License, Version 1.0.
      (See accompanying file LICENSE_1_0.txt or copy at
          http://www.boost.org/LICENSE_1_0.txt)
*/

/*******************************************************
 *                                                     *
 *  -------------------------------------------------  *
 *  |  0  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |  *
 *  -------------------------------------------------  *
 *  |  0  |  4  |  8  |  12 |  16 |  20 |  24 |  28 |  *
 *  -------------------------------------------------  *
 *  |    TOC    |    R14    |    R15    |    R16    |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  8  |  9  |  10 |  11 |  12 |  13 |  14 |  15 |  *
 *  -------------------------------------------------  *
 *  |  32 |  36 |  40 |  44 |  48 |  52 |  56 |  60 |  *
 *  -------------------------------------------------  *
 *  |    R17    |    R18    |     R19   |    R20    |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  16 |  17 |  18 |  19 |  20 |  21 |  22 |  23 |  *
 *  -------------------------------------------------  *
 *  |  64 |  68 |  72 |  76 |  80 |  84 |  88 |  92 |  *
 *  -------------------------------------------------  *
 *  |    R21    |    R22    |    R23    |    R24    |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  24 |  25 |  26 |  27 |  28 |  29 |  30 |  31 |  *
 *  -------------------------------------------------  *
 *  |  96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 |  *
 *  -------------------------------------------------  *
 *  |    R25    |    R26    |    R27    |    R28    |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  32 |  33 |  34 |  35 |  36 |  37 |  38 |  39 |  *
 *  -------------------------------------------------  *
 *  | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 |  *
 *  -------------------------------------------------  *
 *  |    R29    |    R30    |    R31    |   hidden  |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  40 |  41 |  42 |  43 |  44 |  45 |  46 |  47 |  *
 *  -------------------------------------------------  *
 *  | 160 | 164 | 168 | 172 | 176 | 180 | 184 | 188 |  *
 *  -------------------------------------------------  *
 *  |     CR    |     LR    |     PC    | back-chain|  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  48 |  49 |  50 |  51 |  52 |  53 |  54 |  55 |  *
 *  -------------------------------------------------  *
 *  | 192 | 196 | 200 | 204 | 208 | 212 | 216 | 220 |  *
 *  -------------------------------------------------  *
 *  |  cr saved |  lr saved |  compiler |   linker  |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  56 |  57 |  58 |  59 |  60 |  61 |  62 |  63 |  *
 *  -------------------------------------------------  *
 *  | 224 | 228 | 232 | 236 | 240 | 244 | 248 | 252 |  *
 *  -------------------------------------------------  *
 *  | TOC saved |    FCTX   |    DATA   |           |  *
 *  -------------------------------------------------  *
 *                                                     *
 *******************************************************/

.text
.align 2
.globl _jump_fcontext

_jump_fcontext:
    ; reserve space on stack
    subi  r1, r1, 184

    std  r14, 8(r1)  ; save R14
    std  r15, 16(r1)  ; save R15
    std  r16, 24(r1)  ; save R16
    std  r17, 32(r1)  ; save R17
    std  r18, 40(r1)  ; save R18
    std  r19, 48(r1)  ; save R19
    std  r20, 56(r1)  ; save R20
    std  r21, 64(r1)  ; save R21
    std  r22, 72(r1)  ; save R22
    std  r23, 80(r1)  ; save R23
    std  r24, 88(r1)  ; save R24
    std  r25, 96(r1)  ; save R25
    std  r26, 104(r1)  ; save R26
    std  r27, 112(r1)  ; save R27
    std  r28, 120(r1)  ; save R28
    std  r29, 128(r1)  ; save R29
    std  r30, 136(r1)  ; save R30
    std  r31, 144(r1)  ; save R31
    std  r3,  152(r1)  ; save hidden

    ; save CR
    mfcr  r0
    std   r0, 160(r1)
    ; save LR
    mflr  r0
    std   r0, 168(r1)
    ; save LR as PC
    std   r0, 176(r1)

    ; store RSP (pointing to context-data) in R6
    mr  r6, r1

    ; restore RSP (pointing to context-data) from R4
    mr  r1, r4

    ld  r14, 8(r1)  ; restore R14
    ld  r15, 16(r1)  ; restore R15
    ld  r16, 24(r1)  ; restore R16
    ld  r17, 32(r1)  ; restore R17
    ld  r18, 40(r1)  ; restore R18
    ld  r19, 48(r1)  ; restore R19
    ld  r20, 56(r1)  ; restore R20
    ld  r21, 64(r1)  ; restore R21
    ld  r22, 72(r1)  ; restore R22
    ld  r23, 80(r1)  ; restore R23
    ld  r24, 88(r1)  ; restore R24
    ld  r25, 96(r1)  ; restore R25
    ld  r26, 104(r1)  ; restore R26
    ld  r27, 112(r1)  ; restore R27
    ld  r28, 120(r1)  ; restore R28
    ld  r29, 128(r1)  ; restore R29
    ld  r30, 136(r1)  ; restore R30
    ld  r31, 144(r1)  ; restore R31
    ld  r3,  152(r1)  ; restore hidden

    ; restore CR
    ld  r0, 160(r1)
    mtcr  r0
    ; restore LR
    ld  r0, 168(r1)
    mtlr  r0

    ; load PC
    ld  r12, 176(r1)
    # restore CTR
    mtctr  r12

    # adjust stack
    addi  r1, r1, 184

    # zero in r3 indicates first jump to context-function
    cmpdi r3, 0
    beq use_entry_arg

    # return transfer_t
    std  r6, 0(r3)
    std  r5, 8(r3)

    # jump to context
    bctr

use_entry_arg:
    # copy transfer_t into transfer_fn arg registers
    mr  r3, r6
    mr  r4, r5

    # jump to context
    bctr
Commit	Line	Data
7c673cae FG	1	/*
	2	Copyright Oliver Kowalke 2009.
	3	Distributed under the Boost Software License, Version 1.0.
	4	(See accompanying file LICENSE_1_0.txt or copy at
	5	http://www.boost.org/LICENSE_1_0.txt)
	6	*/
	7
	8	/*******************************************************
	9	* *
	10	* ------------------------------------------------- *
	11	* \| 0 \| 1 \| 2 \| 3 \| 4 \| 5 \| 6 \| 7 \| *
	12	* ------------------------------------------------- *
	13	* \| 0 \| 4 \| 8 \| 12 \| 16 \| 20 \| 24 \| 28 \| *
	14	* ------------------------------------------------- *
	15	* \| TOC \| R14 \| R15 \| R16 \| *
	16	* ------------------------------------------------- *
	17	* ------------------------------------------------- *
	18	* \| 8 \| 9 \| 10 \| 11 \| 12 \| 13 \| 14 \| 15 \| *
	19	* ------------------------------------------------- *
	20	* \| 32 \| 36 \| 40 \| 44 \| 48 \| 52 \| 56 \| 60 \| *
	21	* ------------------------------------------------- *
	22	* \| R17 \| R18 \| R19 \| R20 \| *
	23	* ------------------------------------------------- *
	24	* ------------------------------------------------- *
	25	* \| 16 \| 17 \| 18 \| 19 \| 20 \| 21 \| 22 \| 23 \| *
	26	* ------------------------------------------------- *
	27	* \| 64 \| 68 \| 72 \| 76 \| 80 \| 84 \| 88 \| 92 \| *
	28	* ------------------------------------------------- *
	29	* \| R21 \| R22 \| R23 \| R24 \| *
	30	* ------------------------------------------------- *
	31	* ------------------------------------------------- *
	32	* \| 24 \| 25 \| 26 \| 27 \| 28 \| 29 \| 30 \| 31 \| *
	33	* ------------------------------------------------- *
	34	* \| 96 \| 100 \| 104 \| 108 \| 112 \| 116 \| 120 \| 124 \| *
	35	* ------------------------------------------------- *
	36	* \| R25 \| R26 \| R27 \| R28 \| *
	37	* ------------------------------------------------- *
	38	* ------------------------------------------------- *
	39	* \| 32 \| 33 \| 34 \| 35 \| 36 \| 37 \| 38 \| 39 \| *
	40	* ------------------------------------------------- *
	41	* \| 128 \| 132 \| 136 \| 140 \| 144 \| 148 \| 152 \| 156 \| *
	42	* ------------------------------------------------- *
	43	* \| R29 \| R30 \| R31 \| hidden \| *
	44	* ------------------------------------------------- *
	45	* ------------------------------------------------- *
	46	* \| 40 \| 41 \| 42 \| 43 \| 44 \| 45 \| 46 \| 47 \| *
	47	* ------------------------------------------------- *
	48	* \| 160 \| 164 \| 168 \| 172 \| 176 \| 180 \| 184 \| 188 \| *
	49	* ------------------------------------------------- *
	50	* \| CR \| LR \| PC \| back-chain\| *
	51	* ------------------------------------------------- *
	52	* ------------------------------------------------- *
	53	* \| 48 \| 49 \| 50 \| 51 \| 52 \| 53 \| 54 \| 55 \| *
	54	* ------------------------------------------------- *
	55	* \| 192 \| 196 \| 200 \| 204 \| 208 \| 212 \| 216 \| 220 \| *
	56	* ------------------------------------------------- *
	57	* \| cr saved \| lr saved \| compiler \| linker \| *
	58	* ------------------------------------------------- *
	59	* ------------------------------------------------- *
	60	* \| 56 \| 57 \| 58 \| 59 \| 60 \| 61 \| 62 \| 63 \| *
	61	* ------------------------------------------------- *
	62	* \| 224 \| 228 \| 232 \| 236 \| 240 \| 244 \| 248 \| 252 \| *
	63	* ------------------------------------------------- *
	64	* \| TOC saved \| FCTX \| DATA \| \| *
65	* ------------------------------------------------- *
66	* *
67	*******************************************************/
68
69	.text
70	.align 2
b32b8144	71	.globl _jump_fcontext
7c673cae FG	72
	73	_jump_fcontext:
	74	; reserve space on stack
	75	subi r1, r1, 184
	76
b32b8144 FG	77	std r14, 8(r1) ; save R14
	78	std r15, 16(r1) ; save R15
	79	std r16, 24(r1) ; save R16
	80	std r17, 32(r1) ; save R17
	81	std r18, 40(r1) ; save R18
	82	std r19, 48(r1) ; save R19
	83	std r20, 56(r1) ; save R20
	84	std r21, 64(r1) ; save R21
	85	std r22, 72(r1) ; save R22
	86	std r23, 80(r1) ; save R23
	87	std r24, 88(r1) ; save R24
	88	std r25, 96(r1) ; save R25
	89	std r26, 104(r1) ; save R26
	90	std r27, 112(r1) ; save R27
	91	std r28, 120(r1) ; save R28
	92	std r29, 128(r1) ; save R29
	93	std r30, 136(r1) ; save R30
	94	std r31, 144(r1) ; save R31
	95	std r3, 152(r1) ; save hidden
7c673cae FG	96
	97	; save CR
	98	mfcr r0
b32b8144	99	std r0, 160(r1)
7c673cae FG	100	; save LR
7c673cae FG	101	mflr r0
b32b8144	102	std r0, 168(r1)
7c673cae	103	; save LR as PC
b32b8144	104	std r0, 176(r1)
7c673cae FG	105
7c673cae FG	106	; store RSP (pointing to context-data) in R6
b32b8144	107	mr r6, r1
7c673cae FG	108
	109	; restore RSP (pointing to context-data) from R4
	110	mr r1, r4
	111
b32b8144 FG	112	ld r14, 8(r1) ; restore R14
	113	ld r15, 16(r1) ; restore R15
	114	ld r16, 24(r1) ; restore R16
	115	ld r17, 32(r1) ; restore R17
	116	ld r18, 40(r1) ; restore R18
	117	ld r19, 48(r1) ; restore R19
	118	ld r20, 56(r1) ; restore R20
	119	ld r21, 64(r1) ; restore R21
	120	ld r22, 72(r1) ; restore R22
	121	ld r23, 80(r1) ; restore R23
	122	ld r24, 88(r1) ; restore R24
	123	ld r25, 96(r1) ; restore R25
	124	ld r26, 104(r1) ; restore R26
	125	ld r27, 112(r1) ; restore R27
	126	ld r28, 120(r1) ; restore R28
	127	ld r29, 128(r1) ; restore R29
	128	ld r30, 136(r1) ; restore R30
	129	ld r31, 144(r1) ; restore R31
	130	ld r3, 152(r1) ; restore hidden
7c673cae FG	131
	132	; restore CR
	133	ld r0, 160(r1)
	134	mtcr r0
	135	; restore LR
	136	ld r0, 168(r1)
	137	mtlr r0
	138
	139	; load PC
b32b8144 FG	140	ld r12, 176(r1)
	141	# restore CTR
	142	mtctr r12
7c673cae	143
b32b8144	144	# adjust stack
7c673cae FG	145	addi r1, r1, 184
7c673cae FG	146
b32b8144 FG	147	# zero in r3 indicates first jump to context-function
	148	cmpdi r3, 0
	149	beq use_entry_arg
7c673cae	150
b32b8144 FG	151	# return transfer_t
	152	std r6, 0(r3)
	153	std r5, 8(r3)
	154
	155	# jump to context
	156	bctr
	157
	158	use_entry_arg:
	159	# copy transfer_t into transfer_fn arg registers
	160	mr r3, r6
	161	mr r4, r5
	162
	163	# jump to context
7c673cae	164	bctr