Intel® C++ Compiler
Community support and assistance for creating C++ code that runs on platforms based on Intel® processors.
7831 Discussions

what is 64-bit call gate descriptor?

logicman112
Beginner
‎08-08-2010 11:34 PM
351 Views
6.3.7 Branch Functions in 64-Bit Mode
In 64-bit mode and compatibility mode, 64-bit call-gate descriptors for far calls
are available
--------------------------------------------------------------------------------------------
I just copied some lines of Intel processors manual in the above (Intel 64 and IA-32). What the manual means by "64-bit call-gate descriptors"? Is the offset of this type of call gate 32 bits only for CPU in 64 bit mode?

So how can we specify 64 bit offset and 16 byte call-gate descriptors for CPU in 64 bits mode? because when we are in 64 bits, IA-32e mode all the descriptors are 16 bytes.

0 Kudos

Link Copied

1 Reply
Aubrey_W_
New Contributor I
‎09-30-2010 02:07 PM
351 Views
Hello,

We are in the process of consolidating the 64-bit Programming foruminto the Intel AVX and CPU Instructions forum and Intel C++ Compiler forum, so I am moving this thread to the C++ Compiler forum, as it is related to assembler programming.

Thanks for your patience.

==
Aubrey W.
Intel Software Network Support
0 Kudos
Copy link
Reply

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.