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gcc_aix_ppc64.S
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gcc_aix_ppc64.S
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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
.file "gcc_aix_ppc64.S"
/*
* void crosscall_ppc64(void (*fn)(void), void *g)
*
* Calling into the gc tool chain, where all registers are caller save.
* Called from standard ppc64 C ABI, where r2, r14-r31, f14-f31 are
* callee-save, so they must be saved explicitly.
* AIX has a special assembly syntax and keywords that can be mixed with
* Linux assembly.
*/
.toc
.csect .text[PR]
.globl crosscall_ppc64
.globl .crosscall_ppc64
.csect crosscall_ppc64[DS]
crosscall_ppc64:
.llong .crosscall_ppc64, TOC[tc0], 0
.csect .text[PR]
.crosscall_ppc64:
// Start with standard C stack frame layout and linkage
mflr 0
std 0, 16(1) // Save LR in caller's frame
std 2, 40(1) // Save TOC in caller's frame
bl saveregs
stdu 1, -296(1)
// Set up Go ABI constant registers
// Must match _cgo_reginit in runtime package.
xor 0, 0, 0
// Restore g pointer (r30 in Go ABI, which may have been clobbered by C)
mr 30, 4
// Call fn
mr 12, 3
mtctr 12
bctrl
addi 1, 1, 296
bl restoreregs
ld 2, 40(1)
ld 0, 16(1)
mtlr 0
blr
saveregs:
// Save callee-save registers
// O=-288; for R in {14..31}; do echo "\tstd\t$R, $O(1)"; ((O+=8)); done; for F in f{14..31}; do echo "\tstfd\t$F, $O(1)"; ((O+=8)); done
std 14, -288(1)
std 15, -280(1)
std 16, -272(1)
std 17, -264(1)
std 18, -256(1)
std 19, -248(1)
std 20, -240(1)
std 21, -232(1)
std 22, -224(1)
std 23, -216(1)
std 24, -208(1)
std 25, -200(1)
std 26, -192(1)
std 27, -184(1)
std 28, -176(1)
std 29, -168(1)
std 30, -160(1)
std 31, -152(1)
stfd 14, -144(1)
stfd 15, -136(1)
stfd 16, -128(1)
stfd 17, -120(1)
stfd 18, -112(1)
stfd 19, -104(1)
stfd 20, -96(1)
stfd 21, -88(1)
stfd 22, -80(1)
stfd 23, -72(1)
stfd 24, -64(1)
stfd 25, -56(1)
stfd 26, -48(1)
stfd 27, -40(1)
stfd 28, -32(1)
stfd 29, -24(1)
stfd 30, -16(1)
stfd 31, -8(1)
blr
restoreregs:
// O=-288; for R in {14..31}; do echo "\tld\t$R, $O(1)"; ((O+=8)); done; for F in {14..31}; do echo "\tlfd\t$F, $O(1)"; ((O+=8)); done
ld 14, -288(1)
ld 15, -280(1)
ld 16, -272(1)
ld 17, -264(1)
ld 18, -256(1)
ld 19, -248(1)
ld 20, -240(1)
ld 21, -232(1)
ld 22, -224(1)
ld 23, -216(1)
ld 24, -208(1)
ld 25, -200(1)
ld 26, -192(1)
ld 27, -184(1)
ld 28, -176(1)
ld 29, -168(1)
ld 30, -160(1)
ld 31, -152(1)
lfd 14, -144(1)
lfd 15, -136(1)
lfd 16, -128(1)
lfd 17, -120(1)
lfd 18, -112(1)
lfd 19, -104(1)
lfd 20, -96(1)
lfd 21, -88(1)
lfd 22, -80(1)
lfd 23, -72(1)
lfd 24, -64(1)
lfd 25, -56(1)
lfd 26, -48(1)
lfd 27, -40(1)
lfd 28, -32(1)
lfd 29, -24(1)
lfd 30, -16(1)
lfd 31, -8(1)
blr