diff options
| -rw-r--r-- | include/asm-m68knommu/processor.h | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/include/asm-m68knommu/processor.h b/include/asm-m68knommu/processor.h index 278b00bc60c..0ee158e09ab 100644 --- a/include/asm-m68knommu/processor.h +++ b/include/asm-m68knommu/processor.h @@ -78,19 +78,31 @@ struct thread_struct { } /* + * Coldfire stacks need to be re-aligned on trap exit, conventional + * 68k can handle this case cleanly. + */ +#if defined(CONFIG_COLDFIRE) +#define reformat(_regs) do { (_regs)->format = 0x4; } while(0) +#else +#define reformat(_regs) do { } while (0) +#endif + +/* * Do necessary setup to start up a newly executed thread. * * pass the data segment into user programs if it exists, * it can't hurt anything as far as I can tell */ -#define start_thread(_regs, _pc, _usp) \ -do { \ - set_fs(USER_DS); /* reads from user space */ \ - (_regs)->pc = (_pc); \ - if (current->mm) \ - (_regs)->d5 = current->mm->start_data; \ - (_regs)->sr &= ~0x2000; \ - wrusp(_usp); \ +#define start_thread(_regs, _pc, _usp) \ +do { \ + set_fs(USER_DS); /* reads from user space */ \ + (_regs)->pc = (_pc); \ + ((struct switch_stack *)(_regs))[-1].a6 = 0; \ + reformat(_regs); \ + if (current->mm) \ + (_regs)->d5 = current->mm->start_data; \ + (_regs)->sr &= ~0x2000; \ + wrusp(_usp); \ } while(0) /* Forward declaration, a strange C thing */ |