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Fix PowerPC restore_rt

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Clang fails to compile the CBE translation of this code ("non-ASM
statement in naked function"). Similar to the implementations of
`restore_rt` on x86 and ARM, when the CBE is in use, this commit employs
alternative inline assembly that avoids using non-immediate input
operands.
This commit is contained in:
taylor.fish 2025-09-13 20:34:05 -07:00
parent 5bf52a6f50
commit 7f49dae284
2 changed files with 26 additions and 10 deletions
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18
lib/std/os/linux/powerpc.zig
View File

@ -247,11 +247,19 @@ pub fn clone() callconv(.naked) usize {
pub const restore = restore_rt;
pub fn restore_rt() callconv(.naked) noreturn {
asm volatile (
\\ sc
:
: [number] "{r0}" (@intFromEnum(SYS.rt_sigreturn)),
: .{ .memory = true, .cr0 = true, .r4 = true, .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r9 = true, .r10 = true, .r11 = true, .r12 = true });
switch (@import("builtin").zig_backend) {
.stage2_c => asm volatile (
\\ li 0, %[number]
\\ sc
:
: [number] "i" (@intFromEnum(SYS.rt_sigreturn)),
: .{ .memory = true, .cr0 = true, .r4 = true, .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r9 = true, .r10 = true, .r11 = true, .r12 = true }),
else => _ = asm volatile (
\\ sc
:
: [number] "{r0}" (@intFromEnum(SYS.rt_sigreturn)),
: .{ .memory = true, .cr0 = true, .r4 = true, .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r9 = true, .r10 = true, .r11 = true, .r12 = true }),
}
}
pub const F = struct {

18
lib/std/os/linux/powerpc64.zig
View File

@ -232,11 +232,19 @@ pub fn clone() callconv(.naked) usize {
pub const restore = restore_rt;
pub fn restore_rt() callconv(.naked) noreturn {
asm volatile (
\\ sc
:
: [number] "{r0}" (@intFromEnum(SYS.rt_sigreturn)),
: .{ .memory = true, .cr0 = true, .r4 = true, .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r9 = true, .r10 = true, .r11 = true, .r12 = true });
switch (@import("builtin").zig_backend) {
.stage2_c => asm volatile (
\\ li 0, %[number]
\\ sc
:
: [number] "i" (@intFromEnum(SYS.rt_sigreturn)),
: .{ .memory = true, .cr0 = true, .r4 = true, .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r9 = true, .r10 = true, .r11 = true, .r12 = true }),
else => _ = asm volatile (
\\ sc
:
: [number] "{r0}" (@intFromEnum(SYS.rt_sigreturn)),
: .{ .memory = true, .cr0 = true, .r4 = true, .r5 = true, .r6 = true, .r7 = true, .r8 = true, .r9 = true, .r10 = true, .r11 = true, .r12 = true }),
}
}
pub const F = struct {