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fix __chkstk on aarch64

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This commit is contained in:
Jonathan Marler 2021-09-14 02:42:27 -06:00 committed by Andrew Kelley
parent 19691c0b17
commit f83a4b444c
1 changed files with 18 additions and 14 deletions
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32
lib/std/special/compiler_rt/stack_probe.zig
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@ -53,19 +53,6 @@ pub fn zig_probe_stack() callconv(.Naked) void {
},
else => {},
}
if (comptime native_arch.isAARCH64()) {
asm volatile (
\\ lsl x16, x15, #4
\\ mov x17, sp
\\1:
\\ sub x17, x17, #PAGE_SIZE
\\ subs x16, x16, #PAGE_SIZE
\\ ldr xzr, [x17]
\\ b.gt 1b
\\
\\ ret
);
}
unreachable;
}
@ -118,6 +105,21 @@ fn win_probe_stack_only() void {
},
else => {},
}
if (comptime native_arch.isAARCH64()) {
// NOTE: page size hardcoded to 4096 for now
asm volatile (
\\ lsl x16, x15, #4
\\ mov x17, sp
\\1:
\\
\\ sub x17, x17, 4096
\\ subs x16, x16, 4096
\\ ldr xzr, [x17]
\\ b.gt 1b
\\
\\ ret
);
}
unreachable;
}
@ -199,7 +201,9 @@ pub fn _chkstk() callconv(.Naked) void {
}
pub fn __chkstk() callconv(.Naked) void {
@setRuntimeSafety(false);
switch (native_arch) {
if (comptime native_arch.isAARCH64()) {
@call(.{ .modifier = .always_inline }, win_probe_stack_only, .{});
} else switch (native_arch) {
.i386 => @call(.{ .modifier = .always_inline }, win_probe_stack_adjust_sp, .{}),
.x86_64 => @call(.{ .modifier = .always_inline }, win_probe_stack_only, .{}),
else => unreachable,