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TheRock/build_tools/third_party/implib/arch/powerpc64/trampoline.S.tpl
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

112 lines
1.6 KiB
Smarty
Vendored

/*
* Copyright 2024-2025 Yury Gribov
*
* The MIT License (MIT)
*
* Use of this source code is governed by MIT license that can be
* found in the LICENSE.txt file.
*/
.globl $sym
.p2align 4
.type $sym, %function
#ifndef IMPLIB_EXPORT_SHIMS
.hidden $sym
#endif
.section ".opd", "aw"
.align 3
$sym:
.quad .L.$sym, .TOC.@tocbase, 0
.previous
.L.$sym:
.cfi_startproc
1:
// Load address
addis 11, 2, .LC0@toc@ha
ld 11, .LC0@toc@l(11)
ld 11, $offset(11)
cmpdi 11, 0
beq 3f
2: // "Fast" path
// TODO:
// We need to somehow get rid of additional stack frame
// because it breaks arguments which are passed on stack.
// Currently we work around this by duplicating parameters
// in new stack frame but this supports only 16 parameters
// and is very inefficient.
mflr 0
std 0, 16(1)
stdu 1, -176(1)
.cfi_def_cfa_offset 176
.cfi_offset lr, 16
std 2, 40(1)
ld 0, 176+112(1)
std 0, 112(1)
ld 0, 176+120(1)
std 0, 120(1)
ld 0, 176+128(1)
std 0, 128(1)
ld 0, 176+136(1)
std 0, 136(1)
ld 0, 176+144(1)
std 0, 144(1)
ld 0, 176+152(1)
std 0, 152(1)
ld 0, 176+160(1)
std 0, 160(1)
ld 0, 176+168(1)
std 0, 168(1)
ld 2, 8(11)
ld 11, 0(11)
mtctr 11
bctrl
ld 2, 40(1)
addi 1, 1, 176
.cfi_def_cfa_offset 0
ld 0, 16(1)
mtlr 0
.cfi_restore lr
blr
3: // Slow path
mflr 0
std 0, 16(1)
li 0, $number
std 0, -8(1)
stdu 1, -128(1)
.cfi_def_cfa_offset 128
.cfi_offset lr, 16
bl _${lib_suffix}_save_regs_and_resolve
nop
addi 1, 1, 128
.cfi_def_cfa_offset 0
ld 0, 16(1)
mtlr 0
.cfi_restore lr
b 2b
.long 0
.quad 0
.cfi_endproc