73 lines
3 KiB
ArmAsm
73 lines
3 KiB
ArmAsm
/*******************************************************
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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 | 8 | 16 | 24 | *
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* ------------------------------------------------- *
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* | FS0 | FS1 | FS2 | FS3 | *
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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 | 40 | 48 | 56 | *
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* ------------------------------------------------- *
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* | FS4 | FS5 | FS6 | FS7 | *
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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 | 72 | 80 | 88 | *
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* ------------------------------------------------- *
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* | S0 | S1 | S2 | S3 | *
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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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* | S4 | S5 | S6 | S7 | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
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* ------------------------------------------------- *
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* | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | *
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* ------------------------------------------------- *
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* | S8 | FP | RA | PC | *
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* ------------------------------------------------- *
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* *
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* *****************************************************/
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.file "make_loongarch64_sysv_elf_gas.S"
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.text
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.globl make_fcontext
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.align 2
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.type make_fcontext,@function
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make_fcontext:
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# shift address in A0 to lower 16 byte boundary
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bstrins.d $a0, $zero, 3, 0
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# reserve space for context-data on context-stack
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addi.d $a0, $a0, -160
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# third arg of make_fcontext() == address of context-function
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st.d $a2, $a0, 152
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# save address of finish as return-address for context-function
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# will be entered after context-function returns
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la.local $a4, finish
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st.d $a4, $a0, 144
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# return pointer to context-data
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jr $ra
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finish:
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# exit code is zero
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li.d $a0, 0
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# call _exit(0)
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b %plt(_exit)
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.size make_fcontext, .-make_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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