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path: root/src/runtime/rt0_linux_ppc64le.s
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2026-01-30all: switch linux-ppc64 target to ELFv2 ABIPaul Murphy
Go is only capable of producing internally linked, static binaries on linux-ppc64. As such, binaries should run in either ELFv1 or ELFv2 ppc64 userspaces today. This opens the door to enabling cgo and external linking which will require ELFv2 support and userspace, eventually. Fixes #76244 Change-Id: I5ca15037cbe546f352e8693dcf14da51a308b8ca Reviewed-on: https://go-review.googlesource.com/c/go/+/734540 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2025-09-30runtime: unify ppc64/ppc64le library entry pointqmuntal
Cq-Include-Trybots: luci.golang.try:gotip-linux-ppc64le_power10 Change-Id: Ifd7861488b1b47a5d30163552b51838f2bef7248 Reviewed-on: https://go-review.googlesource.com/c/go/+/706395 Reviewed-by: Carlos Amedee <carlos@golang.org> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Auto-Submit: Keith Randall <khr@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-05-22all: convert PPC64 CMPx ...,R0,... to CMPx Rx,$0Paul E. Murphy
Cleanup all remaining trivial compares against $0 in ppc64x assembly. In math, SRD ...,Rx; CMP Rx, $0 is further simplified to SRDCC. Change-Id: Ia2bc204953e32f08ee142bfd06a91965f30f99b6 Reviewed-on: https://go-review.googlesource.com/c/go/+/587016 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com> Run-TryBot: Paul Murphy <murp@ibm.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-04-12runtime: cleanup ppc64le/linux library startup codePaul E. Murphy
Fix the argument passing to runtime.newosproc0, the ABI0 argument storing must account for the fixed frame size. Cleanup the _rt0_ppc64le_linux_lib definition, the assembler should not generate a stack frame. And convert it to use the new ABI wrappers. Change-Id: Ibc0be8b37f6522900781a19980fa018dd89ba7b3 Reviewed-on: https://go-review.googlesource.com/c/go/+/479796 Reviewed-by: Than McIntosh <thanm@google.com> Run-TryBot: Paul Murphy <murp@ibm.com> Reviewed-by: David Chase <drchase@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
2023-02-08runtime: correct typosOleksandr Redko
- Fix typo in throw error message for arena. - Correct typos in assembly and Go comments. - Fix log message in TestTraceCPUProfile. Change-Id: I874c9e8cd46394448b6717bc6021aa3ecf319d16 GitHub-Last-Rev: d27fad4d3cea81cc7a4ca6917985bcf5fa49b0e0 GitHub-Pull-Request: golang/go#58375 Reviewed-on: https://go-review.googlesource.com/c/go/+/465975 Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2022-03-22runtime: make static/dynamic startup detection work with musl on ppc64lePaul E. Murphy
The glibc loader explicitly sets the first doubleword on the stack (R1) to $0 to indicate it was dynamically loaded. An ELFv2 ABI compliant loader will set R3/R4 to argc/argv when starting the process, and R13 to TLS. musl is not compliant. Instead it passes argc/argv like the kernel, but R3/R4 are in an undefined state and R13 is valid. With the knowledge above, the startup code can be modified to dynamically handle all three cases when linked internally. Fixes #51787 Change-Id: I5de33862c161900d9161817388bbc13a65fdc69c Reviewed-on: https://go-review.googlesource.com/c/go/+/394654 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Paul Murphy <murp@ibm.com> TryBot-Result: Gopher Robot <gobot@golang.org> Trust: Paul Murphy <murp@ibm.com> Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
2020-09-02runtime: add file copyright header declarationHeisenberg
Some files have no copyright notice. The copyright time is the earliest modification record of the file. Change-Id: I5698bae16b6b73543e074415877a03348f792951 Reviewed-on: https://go-review.googlesource.com/c/go/+/246378 Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2018-10-03all: this big patch remove whitespace from assembly filesZhou Peng
Don't worry, this patch just remove trailing whitespace from assembly files, and does not touch any logical changes. Change-Id: Ia724ac0b1abf8bc1e41454bdc79289ef317c165d Reviewed-on: https://go-review.googlesource.com/c/113595 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-08-11runtime: make sure R0 is zero before _main on ppc64leCarlos Eduardo Seo
_main has an early check to verify if a binary is statically or dynamically linked that depends on R0 being zero. R0 is not guaranteed to be zero at that point and this was breaking Go on Alpine for ppc64le. Change-Id: I4a1059ff7fd3db6fc489e7dcfe631c1814dd965b Reviewed-on: https://go-review.googlesource.com/54730 Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
2017-08-09cmd/go,cmd/link: support buildmode c-shared on ppc64leLynn Boger
This change enables buildmode c-shared on ppc64le. A bug was fixed in runtime/rt0_linux_ppc64le.s that was necessary to make this work. In _rt0_ppc64le_linux_lib, there is code to store the value of r2 onto the caller's stack. However, if this file is compiled using a build mode that maintains the TOC address in r2, then instructions will be inserted at the beginning of this function to generate the r2 value for the callee, not the caller. That means the r2 value for the callee is stored onto the caller's stack. If caller and callee don't have the same r2 values, then the caller will restore the wrong r2 value after it returns. This situation can happen when using dlopen since the caller of this function will be in ld64.so and will definitely have a different TOC. Updates #20756 Change-Id: I6e165e0d0716e73721bbbcc520e8302e4856e3ba Reviewed-on: https://go-review.googlesource.com/53890 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-06-05runtime: save and restore CR for ppc64leIan Lance Taylor
C code expects CR2, CR3, and CR4 to be preserved across function calls. Preserve the entire CR register across function calls in _rt0_ppc64le_linux_lib and crosscall2. The standard ppc64le call frame uses 8(R1) as the place to save CR; emulate that. It's hard to write a reliable test for this as it requires writing C code that sets CR2, CR3, or CR4 across a call to a Go function. Change-Id: If39e771a5b574602b848227312e83598fe74eab7 Reviewed-on: https://go-review.googlesource.com/44733 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com> Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
2017-05-24runtime: fix ppc64le c-archive initIan Lance Taylor
We weren't setting r0 to 0, as required by our generated code. Before this patch, the misc/cgo/testcarchive tests failed on ppc64le. After this patch, they work, so enable them. Change-Id: I53b16746961da9f7c34f59030a1e40953c9c1e05 Reviewed-on: https://go-review.googlesource.com/44093 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-05-26runtime: add library startup support for ppc64leRuss Cox
I have been running this patch inside Google against Go 1.6 for the last month. The new tests will probably break the builders but let's see exactly how they break. Change-Id: Ia65cf7d3faecffeeb4b06e9b80875c0e57d86d9e Reviewed-on: https://go-review.googlesource.com/23452 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-11-13runtime: replace tls0 with m0.tlsMatthew Dempsky
We're allocating TLS storage for m0 anyway, so might as well use it. Change-Id: I7dc20bbea5320c8ab8a367f18a9540706751e771 Reviewed-on: https://go-review.googlesource.com/16890 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Michael Hudson-Doyle <michael.hudson@canonical.com> Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-10-18runtime, runtime/cgo: conform to PIC register use rules in ppc64 asmMichael Hudson-Doyle
PIC code on ppc64le uses R2 as a TOC pointer and when calling a function through a function pointer must ensure the function pointer is in R12. These rules are easy enough to follow unconditionally in our assembly, so do that. Change-Id: Icfc4e47ae5dfbe15f581cbdd785cdeed6e40bc32 Reviewed-on: https://go-review.googlesource.com/15526 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-01-07cmd/cgo, runtime/cgo: support ppc64Austin Clements
This implements support for calls to and from C in the ppc64 C ABI, as well as supporting functionality such as an entry point from the dynamic linker. Change-Id: I68da6df50d5638cb1a3d3fef773fb412d7bf631a Reviewed-on: https://go-review.googlesource.com/2009 Reviewed-by: Russ Cox <rsc@golang.org>
2015-01-07runtime: set up C TLS and save g to it on ppc64Austin Clements
Cgo will need this for calls from C to Go and for handling signals that may occur in C code. Change-Id: I50cc4caf17cd142bff501e7180a1e27721463ada Reviewed-on: https://go-review.googlesource.com/2008 Reviewed-by: Russ Cox <rsc@golang.org>
2014-12-05all: power64 is now ppc64Russ Cox
Fixes #8654. LGTM=austin R=austin CC=golang-codereviews https://golang.org/cl/180600043
generated by cgit v1.3 (git 2.53.0) at 2026-04-16 08:21:46 +0000