121 lines
4.2 KiB
ArmAsm
121 lines
4.2 KiB
ArmAsm
/*
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Copyright Oliver Kowalke 2009.
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*******************************************************
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* *
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* ------------------------------------------------- *
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* | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | *
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* ------------------------------------------------- *
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* | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | *
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* ------------------------------------------------- *
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* | F20 | F22 | F24 | F26 | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
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* ------------------------------------------------- *
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* | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | *
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* ------------------------------------------------- *
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* | F28 | F30 | S0 | S1 | S2 | S3 | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
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* ------------------------------------------------- *
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* | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | *
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* ------------------------------------------------- *
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* | S4 | S5 | S6 | S7 | FP |hiddn| RA | PC | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
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* ------------------------------------------------- *
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* | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | *
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* ------------------------------------------------- *
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* | ABI ARGS | GP | FCTX| DATA| | *
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* ------------------------------------------------- *
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* *
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* *****************************************************/
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.file "ontop_mips32_o32_elf_gas.S"
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.text
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.globl ostd_ontop_fcontext
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.align 2
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.type ostd_ontop_fcontext,@function
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.ent ostd_ontop_fcontext
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ostd_ontop_fcontext:
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# reserve space on stack
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addiu $sp, $sp, -96
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sw $s0, 48($sp) # save S0
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sw $s1, 52($sp) # save S1
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sw $s2, 56($sp) # save S2
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sw $s3, 60($sp) # save S3
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sw $s4, 64($sp) # save S4
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sw $s5, 68($sp) # save S5
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sw $s6, 72($sp) # save S6
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sw $s7, 76($sp) # save S7
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sw $fp, 80($sp) # save FP
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sw $a0, 84($sp) # save hidden, address of returned transfer_t
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sw $ra, 88($sp) # save RA
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sw $ra, 92($sp) # save RA as PC
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#if defined(__mips_hard_float)
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s.d $f20, ($sp) # save F20
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s.d $f22, 8($sp) # save F22
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s.d $f24, 16($sp) # save F24
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s.d $f26, 24($sp) # save F26
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s.d $f28, 32($sp) # save F28
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s.d $f30, 40($sp) # save F30
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#endif
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# store SP (pointing to context-data) in A0
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move $a0, $sp
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# restore SP (pointing to context-data) from A1
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move $sp, $a1
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#if defined(__mips_hard_float)
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l.d $f20, ($sp) # restore F20
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l.d $f22, 8($sp) # restore F22
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l.d $f24, 16($sp) # restore F24
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l.d $f26, 24($sp) # restore F26
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l.d $f28, 32($sp) # restore F28
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l.d $f30, 40($sp) # restore F30
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#endif
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lw $s0, 48($sp) # restore S0
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lw $s1, 52($sp) # restore S1
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lw $s2, 56($sp) # restore S2
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lw $s3, 60($sp) # restore S3
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lw $s4, 64($sp) # restore S4
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lw $s5, 68($sp) # restore S5
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lw $s6, 72($sp) # restore S6
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lw $s7, 76($sp) # restore S7
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lw $fp, 80($sp) # restore FP
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lw $v0, 84($sp) # restore hidden, address of returned transfer_t
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lw $ra, 88($sp) # restore RA
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# load PC
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move $t9, $a3
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# adjust stack
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addiu $sp, $sp, 96
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# return transfer_t from jump
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sw $a0, ($v0) # fctx of transfer_t
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sw $a2, 4($v0) # data of transfer_t
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# pass transfer_t as first arg in context function
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# A0 == hidden, A1 == fctx, A2 == data
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move $a1, $a0
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move $a0, $v0
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# jump to context
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jr $t9
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.end ostd_ontop_fcontext
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.size ostd_ontop_fcontext, .-ostd_ontop_fcontext
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/* Mark that we don't need executable stack. */
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.section .note.GNU-stack,"",%progbits
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