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lseek64.3: srcfix: add some comments to remind myself of some details 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2020-11-23 07:26:10 +01:00
parent 7c1a416d65
commit 90f1c92fd3
1 changed files with 12 additions and 0 deletions
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12
man3/lseek64.3
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@ -170,6 +170,18 @@ system call.
Instead, they have an
.BR lseek (2)
system call that supports 64-bit file offsets.
.\" In arch/x86/entry/syscalls/syscall_32.tbl,
.\" we see the following line:
.\"
.\" 140 i386 _llseek sys_llseek
.\"
.\" This is essentially telling us that 'sys_llseek' (the name generated
.\" by SYSCALL_DEFINE5(llseek...)) is exposed to user-space as system call
.\" number 140, and that system call number will (IIUC) be exposed in
.\" autogenerated headers with the name "__NR__llseek" (i.e., "_llseek").
.\" The "i386" is telling us that this happens in i386 (32-bit Intel).
.\" There is nothing equivalent on x86-64, because 64 bit systems don't
.\" need an _llseek system call.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).