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std: Fix pwrite/pread syscalls on SPARC targets

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This commit is contained in:
LemonBoy 2021-05-01 15:46:28 +02:00
parent 69a9c1488d
commit 718b43504e
1 changed files with 9 additions and 5 deletions
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14
lib/std/os/linux.zig
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@ -386,7 +386,7 @@ pub fn symlinkat(existing: [*:0]const u8, newfd: i32, newpath: [*:0]const u8) us
}
pub fn pread(fd: i32, buf: [*]u8, count: usize, offset: u64) usize {
if (@hasField(SYS, "pread64")) {
if (@hasField(SYS, "pread64") and usize_bits < 64) {
const offset_halves = splitValue64(offset);
if (require_aligned_register_pair) {
return syscall6(
@ -409,8 +409,10 @@ pub fn pread(fd: i32, buf: [*]u8, count: usize, offset: u64) usize {
);
}
} else {
// Some architectures (eg. 64bit SPARC) pread is called pread64.
const S = if (!@hasField(SYS, "pread") and @hasField(SYS, "pread64")) .pread64 else .pread;
return syscall4(
.pread,
S,
@bitCast(usize, @as(isize, fd)),
@ptrToInt(buf),
count,
@ -450,7 +452,7 @@ pub fn write(fd: i32, buf: [*]const u8, count: usize) usize {
}
pub fn ftruncate(fd: i32, length: u64) usize {
if (@hasField(SYS, "ftruncate64")) {
if (@hasField(SYS, "ftruncate64") and usize_bits < 64) {
const length_halves = splitValue64(length);
if (require_aligned_register_pair) {
return syscall4(
@ -478,7 +480,7 @@ pub fn ftruncate(fd: i32, length: u64) usize {
}
pub fn pwrite(fd: i32, buf: [*]const u8, count: usize, offset: u64) usize {
if (@hasField(SYS, "pwrite64")) {
if (@hasField(SYS, "pwrite64") and usize_bits < 64) {
const offset_halves = splitValue64(offset);
if (require_aligned_register_pair) {
@ -502,8 +504,10 @@ pub fn pwrite(fd: i32, buf: [*]const u8, count: usize, offset: u64) usize {
);
}
} else {
// Some architectures (eg. 64bit SPARC) pwrite is called pread64.
const S = if (!@hasField(SYS, "pwrite") and @hasField(SYS, "pwrite64")) .pwrite64 else .pwrite;
return syscall4(
.pwrite,
S,
@bitCast(usize, @as(isize, fd)),
@ptrToInt(buf),
count,