| /kernel/trunk/arch/mips32/include/exception.h |
|---|
| 98,6 → 98,5 |
| extern void exception_entry(void); |
| extern void cache_error_entry(void); |
| extern void exception_init(void); |
| extern __native syscall_handler(__native a0, __native a1, __native a2, |
| __native a3, __native sysnum); |
| #endif |
| /kernel/trunk/arch/mips32/src/exception.c |
|---|
| 40,7 → 40,6 |
| #include <func.h> |
| #include <console/kconsole.h> |
| #include <arch/debugger.h> |
| #include <syscall/syscall.h> |
| static char * exctable[] = { |
| "Interrupt","TLB Modified","TLB Invalid","TLB Invalid Store", |
| 129,14 → 128,6 |
| exc_dispatch(i+INT_OFFSET, istate); |
| } |
| __native syscall_handler(__native a0, __native a1, __native a2, |
| __native a3, __native sysnum) |
| { |
| if (sysnum < SYSCALL_END) |
| return syscall_table[sysnum](a0,a1,a2,a3); |
| panic("Undefined syscall %d", sysnum); |
| } |
| /** Handle syscall userspace call */ |
| static void syscall_exception(int n, istate_t *istate) |
| { |
| /kernel/trunk/arch/mips32/src/start.S |
|---|
| 215,7 → 215,7 |
| andi $k1, $k1, 0x1f # cp0_exc_cause() part 2 |
| sub $k1, 8 # 8=SYSCALL |
| beqz $k1, uspace_shortcut |
| beqz $k1, syscall_shortcut |
| add $k1, 8 # Revert $k1 back to correct exc number |
| REGISTERS_STORE_AND_EXC_RESET $k0 |
| 228,7 → 228,6 |
| REGISTERS_LOAD $sp |
| # The $sp is automatically restored to former value |
| eret |
| nop |
| # it seems that mips reserves some space on stack for varfuncs??? |
| #define SS_ARG4 16 |
| 235,7 → 234,7 |
| #define SS_SP 20 |
| #define SS_STATUS 24 |
| #define SS_EPC 28 |
| uspace_shortcut: |
| syscall_shortcut: |
| # We have a lot of space on the stack, with free use |
| sw $sp, SS_SP($k0) |
| move $sp, $k0 |