diff options
Diffstat (limited to 'sim/README-HACKING')
| -rw-r--r-- | sim/README-HACKING | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/sim/README-HACKING b/sim/README-HACKING index 9bb705e..38915bf 100644 --- a/sim/README-HACKING +++ b/sim/README-HACKING @@ -20,10 +20,7 @@ The common directory contains: - common Makefile fragment and configury (e.g. Make-common.in, aclocal.m4). In addition "common" contains portions of the system call support -(e.g. callback.c, nltvals.def). - -Even though no files are built in this directory, it is still configured -so support for regenerating nltvals.def is present. +(e.g. callback.c, target-newlib-*.c). Common Makefile Support ======================= @@ -161,8 +158,8 @@ internal state pretty printed from gdb. FIXME: This can obviously be made more elaborate. As needed it will be. -Rebuilding nltvals.def -====================== +Rebuilding target-newlib-* files +================================ Checkout a copy of the SIM and LIBGLOSS modules (Unless you've already got one to hand): @@ -191,17 +188,9 @@ all set! If the target has a custom syscall table, you need to declare it: Add your new processor target (you'll need to grub around to find where your syscall.h lives). - devo/sim/<processor>/Makefile.in - - Add the definition: - - ``NL_TARGET = -DNL_TARGET_d10v'' - - just before the line COMMON_POST_CONFIG_FRAG. - devo/sim/<processor>/*.[ch] - Include targ-vals.h instead of syscall.h. + Include target-newlib-syscall.h instead of syscall.h. Tracing ======= @@ -335,8 +324,8 @@ only store the error code when the result is an error. Keep in mind that the CB_SYS_xxx defines are normalized values with no real meaning with respect to the target. They provide a unique map on the host so -that it can parse things sanely. For libgloss, the common/nltvals.def file -creates the target's system call numbers to the CB_SYS_xxx values. +that it can parse things sanely. For libgloss, the common/target-newlib-syscall +file contains the target's system call numbers to the CB_SYS_xxx values. To simulate other userspace targets, you really only need to update the maps pointers that are part of the callback interface. So create CB_TARGET_DEFS_MAP |