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Don't initialize the static TLS area in single-threaded builds

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Jens Goldberg 2023-01-04 20:37:59 +01:00 • committed by Andrew Kelley
parent ed23615638
commit b89158d6fd
1 changed files with 14 additions and 12 deletions
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26
lib/std/start.zig
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@ -437,20 +437,22 @@ fn posixCallMainAndExit() callconv(.C) noreturn {
std.os.linux.pie.relocate(phdrs);
}
// ARMv6 targets (and earlier) have no support for TLS in hardware.
// FIXME: Elide the check for targets >= ARMv7 when the target feature API
// becomes less verbose (and more usable).
if (comptime native_arch.isARM()) {
if (at_hwcap & std.os.linux.HWCAP.TLS == 0) {
// FIXME: Make __aeabi_read_tp call the kernel helper kuser_get_tls
// For the time being use a simple abort instead of a @panic call to
// keep the binary bloat under control.
std.os.abort();
if (!builtin.single_threaded) {
// ARMv6 targets (and earlier) have no support for TLS in hardware.
// FIXME: Elide the check for targets >= ARMv7 when the target feature API
// becomes less verbose (and more usable).
if (comptime native_arch.isARM()) {
if (at_hwcap & std.os.linux.HWCAP.TLS == 0) {
// FIXME: Make __aeabi_read_tp call the kernel helper kuser_get_tls
// For the time being use a simple abort instead of a @panic call to
// keep the binary bloat under control.
std.os.abort();
}
}
}
// Initialize the TLS area.
std.os.linux.tls.initStaticTLS(phdrs);
// Initialize the TLS area.
std.os.linux.tls.initStaticTLS(phdrs);
}
// The way Linux executables represent stack size is via the PT_GNU_STACK
// program header. However the kernel does not recognize it; it always gives 8 MiB.