Longjmp.S provides setjmp/longjmp and "call a function f on a new stack" support for multiple CPU architectures. Switching stacks involves saving, restoring, and avoiding damage to registers. The file is written in multiple assembly languages.
If you have specific questions, I'm willing to take a shot at answering them. You'll need to look at instruction set reference documents and compiler ABI documents to fully understand each implementation. If you're not experienced with assembly language programming, I'd be tempted to steer clear. Stipulate that the code works, and move on... Thanks... Dave -----Original Message----- From: vpp-dev-boun...@lists.fd.io [mailto:vpp-dev-boun...@lists.fd.io] On Behalf Of Mahesh Ishwar Mathad Sent: Tuesday, May 30, 2017 5:07 AM To: vpp-dev@lists.fd.io Subject: [vpp-dev] Need some help on VPP Hi Guys, I need some help in understanding contents of the file ie. ./src/vppinfra/longjmp.S . -- Thanks & Regards, Mahesh Mathad. Disclaimer:- The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. The views expressed in this E-mail message (including the enclosure/(s) or attachment/(s) if any) are those of the individual sender, except where the sender expressly, and with authority, states them to be the views of GlobalEdge. Before opening any mail and attachments please check them for viruses .GlobalEdge does not accept any liability for virus infected mails. _______________________________________________ vpp-dev mailing list vpp-dev@lists.fd.io https://lists.fd.io/mailman/listinfo/vpp-dev _______________________________________________ vpp-dev mailing list vpp-dev@lists.fd.io https://lists.fd.io/mailman/listinfo/vpp-dev
