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/*
Copyright Jiaxun Yang 2018.
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 | 8 | 16 | 24 | *
* ------------------------------------------------- *
* | F24 | F25 | F26 | F27 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
* ------------------------------------------------- *
* | 32 | 40 | 48 | 56 | *
* ------------------------------------------------- *
* | F28 | F29 | F30 | F31 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
* ------------------------------------------------- *
* | 64 | 72 | 80 | 88 | *
* ------------------------------------------------- *
* | S0 | S1 | S2 | S3 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
* ------------------------------------------------- *
* | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | *
* ------------------------------------------------- *
* | S4 | S5 | S6 | S7 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
* ------------------------------------------------- *
* | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | *
* ------------------------------------------------- *
* | FP | GP | RA | PC | *
* ------------------------------------------------- *
* *
* *****************************************************/
.file "jump_mips64_n64_elf_gas.S"
.text
.globl jump_fcontext
.align 3
.type jump_fcontext,@function
.ent jump_fcontext
jump_fcontext:
# reserve space on stack
daddiu $sp, $sp, -160
sd $s0, 64($sp) # save S0
sd $s1, 72($sp) # save S1
sd $s2, 80($sp) # save S2
sd $s3, 88($sp) # save S3
sd $s4, 96($sp) # save S4
sd $s5, 104($sp) # save S5
sd $s6, 112($sp) # save S6
sd $s7, 120($sp) # save S7
sd $fp, 128($sp) # save FP
sd $ra, 144($sp) # save RA
sd $ra, 152($sp) # save RA as PC
#if defined(__mips_hard_float)
s.d $f24, 0($sp) # save F24
s.d $f25, 8($sp) # save F25
s.d $f26, 16($sp) # save F26
s.d $f27, 24($sp) # save F27
s.d $f28, 32($sp) # save F28
s.d $f29, 40($sp) # save F29
s.d $f30, 48($sp) # save F30
s.d $f31, 56($sp) # save F31
#endif
# store SP (pointing to old context-data) in v0 as return
move $v0, $sp
# get SP (pointing to new context-data) from a0 param
move $sp, $a0
#if defined(__mips_hard_float)
l.d $f24, 0($sp) # restore F24
l.d $f25, 8($sp) # restore F25
l.d $f26, 16($sp) # restore F26
l.d $f27, 24($sp) # restore F27
l.d $f28, 32($sp) # restore F28
l.d $f29, 40($sp) # restore F29
l.d $f30, 48($sp) # restore F30
l.d $f31, 56($sp) # restore F31
#endif
ld $s0, 64($sp) # restore S0
ld $s1, 72($sp) # restore S1
ld $s2, 80($sp) # restore S2
ld $s3, 88($sp) # restore S3
ld $s4, 96($sp) # restore S4
ld $s5, 104($sp) # restore S5
ld $s6, 112($sp) # restore S6
ld $s7, 120($sp) # restore S7
ld $fp, 128($sp) # restore FP
ld $ra, 144($sp) # restore RAa
# load PC
ld $t9, 152($sp)
# adjust stack
daddiu $sp, $sp, 160
move $a0, $v0 # move old sp from v0 to a0 as param
move $v1, $a1 # move *data from a1 to v1 as return
# jump to context
jr $t9
.end jump_fcontext
.size jump_fcontext, .-jump_fcontext
/* Mark that we don't need executable stack. */
.section .note.GNU-stack,"",%progbits
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