PPC/s390: cppgc: Conservative stack scanning
Port 1a7f568987
R=mlippautz@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N
Change-Id: I4db697c6a0fab9bd3c9dda4761c3af3ade509ffa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2144691
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67093}
This commit is contained in:
parent
51af323d71
commit
216e2f4d6f
7
BUILD.gn
7
BUILD.gn
@ -353,7 +353,8 @@ config("cppgc_base_config") {
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# Linux->Windows are covered as they use clang.
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if (is_clang || !is_win) {
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if (target_cpu == "x64" || target_cpu == "x86" || target_cpu == "arm" ||
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target_cpu == "arm64") {
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target_cpu == "arm64" || target_cpu == "ppc64" ||
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target_cpu == "s390x") {
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defines = [ "CPPGC_SUPPORTS_CONSERVATIVE_STACK_SCAN" ]
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}
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} else if (is_win) {
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@ -3989,6 +3990,10 @@ v8_source_set("cppgc_base") {
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sources += [ "src/heap/cppgc/asm/arm/push_registers_asm.cc" ]
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} else if (target_cpu == "arm64") {
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sources += [ "src/heap/cppgc/asm/arm64/push_registers_asm.cc" ]
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} else if (target_cpu == "ppc64") {
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sources += [ "src/heap/cppgc/asm/ppc/push_registers_asm.cc" ]
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} else if (target_cpu == "s390x") {
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sources += [ "src/heap/cppgc/asm/s390/push_registers_asm.cc" ]
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}
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} else if (is_win) {
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if (target_cpu == "x64") {
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92
src/heap/cppgc/asm/ppc/push_registers_asm.cc
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92
src/heap/cppgc/asm/ppc/push_registers_asm.cc
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@ -0,0 +1,92 @@
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// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Push all callee-saved registers to get them on the stack for conservative
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// stack scanning.
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//
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// See asm/x64/push_registers_clang.cc for why the function is not generated
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// using clang.
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// Do not depend on V8_TARGET_OS_* defines as some embedders may override the
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// GN toolchain (e.g. ChromeOS) and not provide them.
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// PPC ABI source:
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// http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi.html
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// AIX Runtime process stack:
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// https://www.ibm.com/support/knowledgecenter/ssw_aix_71/assembler/idalangref_runtime_process.html
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asm(
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#if defined(_AIX)
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".globl .PushAllRegistersAndIterateStack, hidden \n"
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".PushAllRegistersAndIterateStack: \n"
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#else
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".globl PushAllRegistersAndIterateStack \n"
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".hidden PushAllRegistersAndIterateStack \n"
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"PushAllRegistersAndIterateStack: \n"
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#endif
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// Push all callee-saved registers.
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// lr, TOC pointer, r16 to r31. 160 bytes.
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// The parameter save area shall be allocated by the caller. 112 btes.
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// At anytime, SP (r1) needs to be multiple of 16 (i.e. 16-aligned).
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" mflr 0 \n"
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" std 0, 16(1) \n"
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#if defined(_AIX)
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" std 2, 40(1) \n"
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#else
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" std 2, 24(1) \n"
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#endif
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" stdu 1, -256(1) \n"
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" std 14, 112(1) \n"
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" std 15, 120(1) \n"
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" std 16, 128(1) \n"
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" std 17, 136(1) \n"
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" std 18, 144(1) \n"
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" std 19, 152(1) \n"
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" std 20, 160(1) \n"
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" std 21, 168(1) \n"
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" std 22, 176(1) \n"
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" std 23, 184(1) \n"
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" std 24, 192(1) \n"
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" std 25, 200(1) \n"
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" std 26, 208(1) \n"
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" std 27, 216(1) \n"
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" std 28, 224(1) \n"
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" std 29, 232(1) \n"
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" std 30, 240(1) \n"
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" std 31, 248(1) \n"
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// Pass 1st parameter (r3) unchanged (Stack*).
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// Pass 2nd parameter (r4) unchanged (StackVisitor*).
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// Save 3rd parameter (r5; IterateStackCallback).
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" mr 6, 5 \n"
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#if defined(_AIX)
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// Set up TOC for callee.
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" ld 2,8(5) \n"
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// AIX uses function decorators, which means that
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// pointers to functions do not point to code, but
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// instead point to metadata about them, hence
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// need to deterrence.
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" ld 6,0(6) \n"
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#endif
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// Pass 3rd parameter as sp (stack pointer).
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" mr 5, 1 \n"
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#if !defined(_AIX)
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// Set up r12 to be equal to the callee address (in order for TOC
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// relocation). Only needed on LE Linux.
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" mr 12, 6 \n"
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#endif
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// Call the callback.
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" mtctr 6 \n"
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" bctrl \n"
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// Discard all the registers.
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" addi 1, 1, 256 \n"
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// Restore lr.
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" ld 0, 16(1) \n"
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" mtlr 0 \n"
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#if defined(_AIX)
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// Restore TOC pointer.
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" ld 2, 40(1) \n"
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#else
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" ld 2, 24(1) \n"
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#endif
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" blr \n");
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34
src/heap/cppgc/asm/s390/push_registers_asm.cc
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34
src/heap/cppgc/asm/s390/push_registers_asm.cc
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@ -0,0 +1,34 @@
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// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Push all callee-saved registers to get them on the stack for conservative
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// stack scanning.
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// See asm/x64/push_registers_clang.cc for why the function is not generated
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// using clang.
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// Do not depend on V8_TARGET_OS_* defines as some embedders may override the
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// GN toolchain (e.g. ChromeOS) and not provide them.
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// S390 ABI source:
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// http://refspecs.linuxbase.org/ELF/zSeries/lzsabi0_zSeries.html
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asm(".globl PushAllRegistersAndIterateStack \n"
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".hidden PushAllRegistersAndIterateStack \n"
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"PushAllRegistersAndIterateStack: \n"
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// Push all callee-saved registers.
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// r6-r13, r14 and sp(r15)
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" stmg %r6, %sp, 48(%sp) \n"
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// Allocate frame.
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" lay %sp, -160(%sp) \n"
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// Pass 1st parameter (r2) unchanged (Stack*).
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// Pass 2nd parameter (r3) unchanged (StackVisitor*).
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// Save 3rd parameter (r4; IterateStackCallback).
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" lgr %r5, %r4 \n"
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// Pass sp parameter as sp (stack pointer). 160+48 to point
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// to callee saved region stored above.
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" lay %r4, 208(%sp) \n"
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// Call the callback.
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" basr %r14, %r5 \n"
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" lmg %r14,%sp, 272(%sp) \n"
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" br %r14 \n");
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