Mercurial > pub > dyncall > dyncall
view dyncall/dyncall_call_arm32_arm_armhf.S @ 595:82aa83f09264
- test/dynload_plain build fixes:
* erroneously used zero based loop in awk which is one based
* missed embedded makefile changes
author | Tassilo Philipp |
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date | Tue, 20 Sep 2022 10:29:23 +0200 |
parents | 7364f285cac8 |
children |
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/* Package: dyncall Library: dyncall File: dyncall/dyncall_call_arm32_arm_armhf.S Description: Call Kernel for ARM 32-bit ARM Architecture - Hard Float License: Copyright (c) 2007-2018 Daniel Adler <dadler@uni-goettingen.de>, Tassilo Philipp <tphilipp@potion-studios.com> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "../portasm/portasm-arm.S" /* ============================================================================ DynCall Call Kernel for ARM 32-bit ARM Architecture Hard-Float ---------------------------------------------------------------------------- C Interface: dcCall_arm32_armhf (DCpointer target, DCpointer argv, DCsize size, DCfloat* regdata); This Call Kernel was tested on Raspberry Pi/Raspbian (Debian) */ .text .code 32 /* ARM mode */ .arch armv6 .fpu vfp /* 1st arg / r0 = funptr 2st arg / r1 = ptr to int args 3st arg / r2 = size 4st arg / r3 = ptr to float args */ GLOBAL_C(dcCall_arm32_armhf) ENTRY_C(dcCall_arm32_armhf) /* Prolog. This function never needs to spill inside its prolog, so just store the permanent registers. */ mov r12 , r13 /* Stack ptr (r13) -> temporary (r12). */ stmdb r13!, {r4-r5, r11, r12, r14} /* Permanent registers and stack pointer (now in r12), etc... -> save area on stack (except counter). */ mov r11, r12 /* Set frame ptr. */ mov r4, r0 /* r4 = fptr */ add r5, r1, #16 /* r5 = stack args (after intreg ones) */ /* Load 16 single-precision registers (= 8 double-precision registers). */ vldmia r3, {d0-d7} /* prep stack parameter area (includes room for spill area, callee spills if needed) */ sub r13, r13, r2 and r13, r13, #-8 /* align 8-byte. */ sub r2, r2, #16 /* loop counters for stack params to copy */ mov r3, #0 armhf_pushArgs: cmp r2, r3 ble armhf_call ldr r0, [r5, +r3] /* load word into r0 ... */ str r0, [r13, +r3] /* ... then push onto stack */ add r3, r3, #4 b armhf_pushArgs armhf_call: ldmia r1, {r0-r3} /* Load first 4 arguments for new call into r0-r3. */ /* 'blx r4' workaround for ARMv4t: */ mov r14, r15 /* Branch return address(r15) -> link register (r14) -- r15 always points to address of current + 2 instructions (= Epilog code). */ bx r4 /* Call (ARM/THUMB), available for ARMv4t. */ /* Epilog. */ ldmdb r11, {r4-r5, r11, r13, r15} /* Restore permanent registers (ignore temporary (r12), restore stack ptr and program counter).@@@db not needed since we rewrite r13? */