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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2007-06-02 20:55:04 +0000 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2007-06-02 20:55:04 +0000 |
| commit | 5a16bf48ffb4ca082e040aa5d3b0a8a93feaf3ad (patch) | |
| tree | 6e412a586f03534f6f59ce5e639ad3c60b2aa557 /man2 | |
| parent | 1272ab181646fe467bc1edc527bd5614d0f39764 (diff) | |
In Linux 2.6, the 'modify_ldt_ldt_s' structure was renamed 'user_desc'.
Include definition of 'user_desc' structure.
Minor rewordings.
Diffstat (limited to 'man2')
| -rw-r--r-- | man2/modify_ldt.2 | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/man2/modify_ldt.2 b/man2/modify_ldt.2 index 8c5d99c5..30ba3018 100644 --- a/man2/modify_ldt.2 +++ b/man2/modify_ldt.2 @@ -54,10 +54,39 @@ is 1, modifies one ldt entry. .I ptr points to a -.I modify_ldt_ldt_s -structure and +.I user_desc +structure +and .I bytecount must equal the size of this structure. +.\" +.\" FIXME, say something about func == 2 ans func == 0x11? +.\" In Linux 2.4, func == 2 returned "the default ldt" +.\" In Linux 2.6, func == 2 is a nop, returning a zeroed out structure. +.\" Linux 2.4 and 2.6 implement an operation for func == 0x11 + +The +.I user_desc +structure is defined in <asm/ldt.h> as: +.in +0.25i +.nf + +struct user_desc { + unsigned int entry_number; + unsigned long base_addr; + unsigned int limit; + unsigned int seg_32bit:1; + unsigned int contents:2; + unsigned int read_exec_only:1; + unsigned int limit_in_pages:1; + unsigned int seg_not_present:1; + unsigned int useable:1; +}; +.fi +.in +.PP +In Linux 2.4 and earlier, this structure was named +.IR modify_ldt_ldt_s . .\" .PP .\" The ldt is specific for the calling process. Any attempts to change .\" the ldt to include the address space of another process or the kernel @@ -72,7 +101,8 @@ or 0 (for writing). On failure, .BR modify_ldt () returns \-1 and sets -.IR errno . +.IR errno +to indicate the error. .SH ERRORS .TP .B EFAULT |