tree 97e17803652b72586ae0e099e6e367f534dea2e5
parent 2ccfcb2ea555eb86122e7780010cc50fcee08f54
author Jeenu Viswambharan <jeenu.viswambharan@arm.com> 1518782064 +0000
committer Jeenu Viswambharan <jeenu.viswambharan@arm.com> 1529594123 +0100

BL31: Introduce jump primitives

This patch introduces setjmp() and ongjmp() primitives to enable
standard setjmp/longjmp style execution. Both APIs parameters take a
pointer to struct jmpbuf type, which hosts CPU registers saved/restored
during jump.

As per the standard usage:

  - setjmp() return 0 when a jump is setup; and a non-zero value when
    returning from jump.

  - The caller of setjmp() must not return, or otherwise update stack
    pointer since.

Change-Id: I4af1d32e490cfa547979631b762b4cba188d0551
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>