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Konstantin BogomolovandgVisor bot
80569583f9
The only thing incompatible was using syscallStubMessageOffset; the simplest fix is to just set it dynamically instead of doing conditional compilation in the assembly file. Updates #8196. PiperOrigin-RevId: 919116883
46 lines
1.9 KiB
Python
46 lines
1.9 KiB
Python
"""Sysmsg rules."""
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load("//tools:arch.bzl", "select_arch")
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load("//tools:defs.bzl", "cc_toolchain")
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def cc_pie_obj(name, srcs, outs):
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native.genrule(
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name = name,
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srcs = srcs,
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outs = outs,
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cmd = "$(CC) $(CC_FLAGS) " +
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select({
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"//tools/bazeldefs:pagesize_64k": " -DPAGE_SIZE=65536 ",
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"//conditions:default": " -DPAGE_SIZE=4096 ",
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}) +
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"-Wall -Werror -Wno-unused-command-line-argument " +
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"-fpie " +
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# -01 is required for clang to avoid making use of memcpy when
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# building for ARM64. For some reason when no optimization is turned
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# on clang makes use of memcpy to copy structures and when combined
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# with -ffreestanding it means we need to provide our own version of
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# memcpy. Using -01 causes clang to not make use of memcpy avoiding
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# the need to supply our own memcpy version.
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select_arch(
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amd64 = "-O2",
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arm64 = "-O1 -mno-outline-atomics ",
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) +
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" -fno-builtin " +
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"-ffreestanding " +
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"-mgeneral-regs-only " +
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# Set -g0 to omit debugging information because it contains
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# absolute paths, which are volatile build information and results
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# in Bazel being unable to properly cache the output. If debugging
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# information is desired, the flags -fdebug-compilation-dir or
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# -fdebug-prefix-map can be used.
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"-g0 " +
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"-Wa,--noexecstack " +
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"-fno-asynchronous-unwind-tables " +
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"-fno-stack-protector " +
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"-c $$(echo $(SRCS) | tr ' ' '\n' | grep -v -E '.h$$') -o $@",
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toolchains = [
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":no_pie_cc_flags",
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cc_toolchain,
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],
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)
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