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Update 32-bit PowerPC syscall functions

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musl and glibc both specify r0 as an output register because its value
may be overwritten by system calls. As with the updates for 64-bit
PowerPC in the previous commit, this commit brings Zig's syscall
functions for 32-bit PowerPC in line with musl and glibc by adding r0 to
the list of clobbers. (Listing r0 as both an input and a clobber is as
close as we can get to musl, which declares it as a "+r" read-write
output, since Zig doesn't support multiple outputs or the "+"
specifier.)
This commit is contained in:
taylor.fish 2025-06-22 16:36:44 -07:00
parent 79807468e7
commit 95b638f613
1 changed files with 7 additions and 7 deletions
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14
lib/std/os/linux/powerpc.zig
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@ -22,7 +22,7 @@ pub fn syscall0(number: SYS) usize {
\\ 1:
: [ret] "={r3}" (-> usize),
: [number] "{r0}" (@intFromEnum(number)),
: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
);
}
@ -35,7 +35,7 @@ pub fn syscall1(number: SYS, arg1: usize) usize {
: [ret] "={r3}" (-> usize),
: [number] "{r0}" (@intFromEnum(number)),
[arg1] "{r3}" (arg1),
: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
);
}
@ -49,7 +49,7 @@ pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
: [number] "{r0}" (@intFromEnum(number)),
[arg1] "{r3}" (arg1),
[arg2] "{r4}" (arg2),
: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
);
}
@ -64,7 +64,7 @@ pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
[arg1] "{r3}" (arg1),
[arg2] "{r4}" (arg2),
[arg3] "{r5}" (arg3),
: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
);
}
@ -80,7 +80,7 @@ pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize)
[arg2] "{r4}" (arg2),
[arg3] "{r5}" (arg3),
[arg4] "{r6}" (arg4),
: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
);
}
@ -97,7 +97,7 @@ pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize,
[arg3] "{r5}" (arg3),
[arg4] "{r6}" (arg4),
[arg5] "{r7}" (arg5),
: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
);
}
@ -123,7 +123,7 @@ pub fn syscall6(
[arg4] "{r6}" (arg4),
[arg5] "{r7}" (arg5),
[arg6] "{r8}" (arg6),
: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
);
}