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| author | Gregory Nutt <gnutt@nuttx.org> | 2014-09-12 08:06:49 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-09-12 08:06:49 -0600 |
| commit | 2425a7e58bf1e08e6b22880dfca6f9095e675630 (patch) | |
| tree | 37f73cc6e3f2c3b1fcc2b961e83a79f33793f916 | |
| parent | de19ad5f0c7bfba50bde0136c4dd8037b72859f1 (diff) | |
| download | nuttx-2425a7e58bf1e08e6b22880dfca6f9095e675630.tar.gz nuttx-2425a7e58bf1e08e6b22880dfca6f9095e675630.tar.bz2 nuttx-2425a7e58bf1e08e6b22880dfca6f9095e675630.zip | |
Update ChangeLog
| -rwxr-xr-x | nuttx/ChangeLog | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog index 389218d95..54cc8cfce 100755 --- a/nuttx/ChangeLog +++ b/nuttx/ChangeLog @@ -8489,3 +8489,12 @@ * arch/arm/src/armv7-a/arm_vectors.S: Fix logic for returning from exceptions to user-mode contexts. NuttX processes are now functional on the Cortex-A (2014-9-11). + * arch/arm/src/armv7-a/arm_fullcontextrestore.S, arm_syscall.c, crt0.c, + and svcall.h: Modify up_fullcontextrestore() for CONFIG_BUILD_KERNEL. + It changed CPSR while in kernel. That will crash if the new CPSR is + user mode while executing in kernel space. Fixed by adding a + SYS_context_restore system call. There is an alternative, simpler + modification to up_fullcontextrestore() that could have been done: It + might have been possible to use the SPSR instead of the CPRSR and then + do an exception return from up_fullcontextrestore(). That would be + more efficient, but I never tried it (2014-9-12). |