otp.git - Mirror of Erlang/OTP repository.

Age	Commit message (Collapse)	Author
2015-01-11	hipe: fix ARM/Thumb interworking	Mikael Pettersson
	HiPE on ARM is currently severely broken if the rest of the VM is compiled to run in Thumb mode -- calling native code quickly ends up executing code in the wrong mode and crashing the VM. This is a problem on e.g. Ubuntu which configures its system GCC to generate Thumb by default. It can also be triggered by overriding CC or CFLAGS when compiling the VM. There were three issues that caused the breakage: 1. Assembly-coded functions in hipe_arm_glue.S weren't explicitly tagged as functions, preventing the linker from generating the correct mode-switching call instructions for calls from C to these functions. Fixed by tagging those symbols as functions. 2. A few BIF wrappers were so simple that they performed tailcalls to the C BIFs. This fails to switch mode when C is in Thumb. Fixed by performing ordinary recursive calls when C is in Thumb. 3. The assembly-coded source files weren't explicitly tagged as ARM. Tested with the HiPE testsuite on ARMv7, with the VM built as ARM and as Thumb. Also manually inspected the object code for the beam executable and checked that call sites from C to HiPE's ARM runtime code and vice versa used the correct mode-switching instructions.
2011-02-14	Cleanup tags	Kostis Sagonas

2010-09-06	Fix call to erts_gc_after_bif_call in hipe glue	Paul Guyot
	R12B-0 changed the signature of erts_gc_after_bif_call and it now takes 4 parameters instead of 2 in R11B-5. Yet, the glue code was not updated accordingly. As a result, the function erts_gc_after_bif_call was called with garbage and would randomly cause a crash later in the garbage collector code. The fix consists in passing NULL and 0 for the third and fourth parameters, since there is no term to add to rootset, recovering the behaviour of R11B-5 (see otp_src_R11B-5/erts/emulator/beam/erl_gc.c, line 314). (Includes assembly language fixes and code style improvements suggested by Mikael Pettersson.)
2009-11-20	The R13B03 release.OTP_R13B03	Erlang/OTP