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Kernel+LibC: Pass 64-bit integers in syscalls by value
Now that support for 32-bit x86 has been removed, we don't have to worry about the top half of `off_t`/`u64` values being chopped off when we try to pass them in registers. Therefore, we no longer need the workaround of pointers to stack-allocated values to syscalls. Note that this changes the system call ABI, so statically linked programs will have to be re-linked.
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12 changed files with 22 additions and 37 deletions
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@ -392,7 +392,7 @@ ssize_t pread(int fd, void* buf, size_t count, off_t offset)
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{
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__pthread_maybe_cancel();
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int rc = syscall(SC_pread, fd, buf, count, &offset);
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int rc = syscall(SC_pread, fd, buf, count, offset);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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@ -897,7 +897,7 @@ char* getlogin()
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/ftruncate.html
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int ftruncate(int fd, off_t length)
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{
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int rc = syscall(SC_ftruncate, fd, &length);
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int rc = syscall(SC_ftruncate, fd, length);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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