Commit 95b638f613406c6bd609c7addd666dbe1758486a | zig

author	taylor.fish <contact@taylor.fish> 2025-06-22 16:36:44-07:00
committer	taylor.fish <contact@taylor.fish> 2025-06-22 16:48:36-07:00
log	95b638f613406c6bd609c7addd666dbe1758486a
tree	b443561403ca23a7041dc81ffbbc353600e74c1c
parent	79807468e747bac056cfea4340065e49a5d97120

Update 32-bit PowerPC syscall functions

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.)

1 files changed, 7 insertions(+), 7 deletions(-)

lib
- std
  - os
    linux
    powerpc.zig

lib/std/os/linux/powerpc.zig+7-7

...	...	@@ -22,7 +22,7 @@ pub fn syscall0(number: SYS) usize {
22	22	\\ 1:
23	23	: [ret] "={r3}" (-> usize),
24	24	: [number] "{r0}" (@intFromEnum(number)),
25		: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
	25	: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
26	26	);
27	27	}
28	28
...	...	@@ -35,7 +35,7 @@ pub fn syscall1(number: SYS, arg1: usize) usize {
35	35	: [ret] "={r3}" (-> usize),
36	36	: [number] "{r0}" (@intFromEnum(number)),
37	37	[arg1] "{r3}" (arg1),
38		: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
	38	: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
39	39	);
40	40	}
41	41
...	...	@@ -49,7 +49,7 @@ pub fn syscall2(number: SYS, arg1: usize, arg2: usize) usize {
49	49	: [number] "{r0}" (@intFromEnum(number)),
50	50	[arg1] "{r3}" (arg1),
51	51	[arg2] "{r4}" (arg2),
52		: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
	52	: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
53	53	);
54	54	}
55	55
...	...	@@ -64,7 +64,7 @@ pub fn syscall3(number: SYS, arg1: usize, arg2: usize, arg3: usize) usize {
64	64	[arg1] "{r3}" (arg1),
65	65	[arg2] "{r4}" (arg2),
66	66	[arg3] "{r5}" (arg3),
67		: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
	67	: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
68	68	);
69	69	}
70	70
...	...	@@ -80,7 +80,7 @@ pub fn syscall4(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize)
80	80	[arg2] "{r4}" (arg2),
81	81	[arg3] "{r5}" (arg3),
82	82	[arg4] "{r6}" (arg4),
83		: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
	83	: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
84	84	);
85	85	}
86	86
...	...	@@ -97,7 +97,7 @@ pub fn syscall5(number: SYS, arg1: usize, arg2: usize, arg3: usize, arg4: usize,
97	97	[arg3] "{r5}" (arg3),
98	98	[arg4] "{r6}" (arg4),
99	99	[arg5] "{r7}" (arg5),
100		: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
	100	: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
101	101	);
102	102	}
103	103
...	...	@@ -123,7 +123,7 @@ pub fn syscall6(
123	123	[arg4] "{r6}" (arg4),
124	124	[arg5] "{r7}" (arg5),
125	125	[arg6] "{r8}" (arg6),
126		: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
	126	: "memory", "cr0", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
127	127	);
128	128	}
129	129