From 35c5deb1d43b245c19059d1532929ee087e44a84 Mon Sep 17 00:00:00 2001 From: Paul Murphy Date: Wed, 7 Jan 2026 13:48:53 -0600 Subject: all: switch linux-ppc64 target to ELFv2 ABI 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 Reviewed-by: Cherry Mui Reviewed-by: Dmitri Shuralyov --- src/runtime/rt0_linux_ppc64le.s | 54 ----------------------------------------- 1 file changed, 54 deletions(-) delete mode 100644 src/runtime/rt0_linux_ppc64le.s (limited to 'src/runtime/rt0_linux_ppc64le.s') diff --git a/src/runtime/rt0_linux_ppc64le.s b/src/runtime/rt0_linux_ppc64le.s deleted file mode 100644 index 3a6e8863b2..0000000000 --- a/src/runtime/rt0_linux_ppc64le.s +++ /dev/null @@ -1,54 +0,0 @@ -// Copyright 2016 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. - -#include "go_asm.h" -#include "textflag.h" -#include "asm_ppc64x.h" - -TEXT _rt0_ppc64le_linux(SB),NOSPLIT,$0 - XOR R0, R0 // Make sure R0 is zero before _main - BR _main<>(SB) - -TEXT _rt0_ppc64le_linux_lib(SB),NOSPLIT|NOFRAME,$0 - JMP _rt0_ppc64x_lib(SB) - -TEXT _main<>(SB),NOSPLIT,$-8 - // In a statically linked binary, the stack contains argc, - // argv as argc string pointers followed by a NULL, envv as a - // sequence of string pointers followed by a NULL, and auxv. - // The TLS pointer should be initialized to 0. - // - // In an ELFv2 compliant dynamically linked binary, R3 contains argc, - // R4 contains argv, R5 contains envp, R6 contains auxv, and R13 - // contains the TLS pointer. - // - // When loading via glibc, the first doubleword on the stack points - // to NULL a value. (that is *(uintptr)(R1) == 0). This is used to - // differentiate static vs dynamically linked binaries. - // - // If loading with the musl loader, it doesn't follow the ELFv2 ABI. It - // passes argc/argv similar to the linux kernel, R13 (TLS) is - // initialized, and R3/R4 are undefined. - MOVD (R1), R12 - CMP R12, $0 - BEQ tls_and_argcv_in_reg - - // Arguments are passed via the stack (musl loader or a static binary) - MOVD 0(R1), R3 // argc - ADD $8, R1, R4 // argv - - // Did the TLS pointer get set? If so, don't change it (e.g musl). - CMP R13, $0 - BNE tls_and_argcv_in_reg - - MOVD $runtime·m0+m_tls(SB), R13 // TLS - ADD $0x7000, R13 - -tls_and_argcv_in_reg: - BR main(SB) - -TEXT main(SB),NOSPLIT,$-8 - MOVD $runtime·rt0_go(SB), R12 - MOVD R12, CTR - BR (CTR) -- cgit v1.3-5-g9baa