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/*
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 | *
* ------------------------------------------------- *
* | 0x0 | 0x4 | 0x8 | 0xc | 0x10| 0x14| 0x18| 0x1c| *
* ------------------------------------------------- *
* | s16 | s17 | s18 | s19 | s20 | s21 | s22 | s23 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
* ------------------------------------------------- *
* | 0x20| 0x24| 0x28| 0x2c| 0x30| 0x34| 0x38| 0x3c| *
* ------------------------------------------------- *
* | s24 | s25 | s26 | s27 | s28 | s29 | s30 | s31 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
* ------------------------------------------------- *
* | 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58| 0x5c| *
* ------------------------------------------------- *
* |hiddn| v1 | v2 | v3 | v4 | v5 | v6 | v7 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
* ------------------------------------------------- *
* | 0x60| 0x64| 0x68| 0x6c| 0x70| 0x74| 0x78| 0x7c| *
* ------------------------------------------------- *
* | v8 | lr | pc | FCTX| DATA| | *
* ------------------------------------------------- *
* *
*******************************************************/
.file "make_arm_aapcs_elf_gas.S"
.text
.globl make_fcontext
.hidden make_fcontext
.align 2
.type make_fcontext,%function
.syntax unified
make_fcontext:
@ shift address in A1 to lower 16 byte boundary
bic a1, a1, #15
@ reserve space for context-data on context-stack
sub a1, a1, #124
@ third arg of make_fcontext() == address of context-function
str a3, [a1, #104]
@ compute address of returned transfer_t
add a2, a1, #108
mov a3, a2
str a3, [a1, #64]
@ compute abs address of label finish
adr a2, finish
@ save address of finish as return-address for context-function
@ will be entered after context-function returns
str a2, [a1, #100]
#if (defined(__VFP_FP__) && !defined(__SOFTFP__))
#endif
bx lr @ return pointer to context-data
finish:
@ exit code is zero
mov a1, #0
@ exit application
bl _exit@PLT
.size make_fcontext,.-make_fcontext
@ Mark that we don't need executable stack.
.section .note.GNU-stack,"",%progbits
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