arm-trusted-firmware

History

Jeenu Viswambharan a806dad58c Define and use no_ret macro where no return is expected There are many instances in ARM Trusted Firmware where control is transferred to functions from which return isn't expected. Such jumps are made using 'bl' instruction to provide the callee with the location from which it was jumped to. Additionally, debuggers infer the caller by examining where 'lr' register points to. If a 'bl' of the nature described above falls at the end of an assembly function, 'lr' will be left pointing to a location outside of the function range. This misleads the debugger back trace. This patch defines a 'no_ret' macro to be used when jumping to functions from which return isn't expected. The macro ensures to use 'bl' instruction for the jump, and also, for debug builds, places a 'nop' instruction immediately thereafter (unless instructed otherwise) so as to leave 'lr' pointing within the function range. Change-Id: Ib34c69fc09197cfd57bc06e147cc8252910e01b0 Co-authored-by: Douglas Raillard <douglas.raillard@arm.com> Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>		8 years ago
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aarch64	Define and use no_ret macro where no return is expected	8 years ago
bl2u.ld.S	Introduce SEPARATE_CODE_AND_RODATA build flag	8 years ago
bl2u.mk	FWU: Add Generic BL2U FWU image support in BL2	9 years ago
bl2u_main.c	FWU: Add Generic BL2U FWU image support in BL2	9 years ago