*/
#include <i386/asm.h>
#include <assym.s>
-#include <mach_kdb.h>
#include <i386/eflags.h>
#include <i386/trap.h>
#include <i386/rtclock_asm.h>
#define LO_UNIX_SCALL EXT(lo_unix_scall32)
#define LO_MACH_SCALL EXT(lo_mach_scall32)
#define LO_MDEP_SCALL EXT(lo_mdep_scall32)
-#define LO_DIAG_SCALL EXT(lo_diag_scall32)
-
#define HI_DATA(lo_addr) ( (EXT(lo_addr) - EXT(hi_remap_data)) + HIGH_IDT_BASE )
#define HI_TEXT(lo_text) ( (EXT(lo_text) - EXT(hi_remap_text)) + HIGH_MEM_BASE )
* Extra-special interrupt code. Note that no offset may be
* specified in a task gate descriptor, so name is ignored.
*/
-#define EXCEP_TASK(n,name) \
- IDT_BASE_ENTRY_TG(0,DEBUG_TSS,K_TASK_GATE)
/* Double-fault fatal handler */
#define DF_FATAL_TASK(n,name) \
EXCEP_USR(0x05,t_bounds)
EXCEPTION(0x06,t_invop)
EXCEPTION(0x07,t_nofpu)
-#if MACH_KDB
-EXCEP_TASK(0x08,db_task_dbl_fault)
-#else
DF_FATAL_TASK(0x08,df_task_start)
-#endif
EXCEPTION(0x09,a_fpu_over)
EXCEPTION(0x0a,a_inv_tss)
EXCEP_SPC(0x0b,hi_segnp)
-#if MACH_KDB
-EXCEP_TASK(0x0c,db_task_stk_fault)
-#else
EXCEP_ERR(0x0c,t_stack_fault)
-#endif
EXCEP_SPC(0x0d,hi_gen_prot)
EXCEP_SPC(0x0e,hi_page_fault)
EXCEPTION(0x0f,t_trap_0f)
EXCEP_SPC_USR(0x80,hi_unix_scall)
EXCEP_SPC_USR(0x81,hi_mach_scall)
EXCEP_SPC_USR(0x82,hi_mdep_scall)
-EXCEP_SPC_USR(0x83,hi_diag_scall)
-
+INTERRUPT(0x83)
INTERRUPT(0x84)
INTERRUPT(0x85)
INTERRUPT(0x86)
jmp enter_lohandler
-Entry(hi_diag_scall)
- pushl %eax // Save sselector
- pushl $0 // Clear trap number slot
- pusha // save the general registers
- movl $(LO_DIAG_SCALL),%ebx // Get the function down low to transfer to
- jmp enter_lohandler // Leap to it...
-
-
/*
* sysenter entry point
* Requires user code to set up:
*/
-Entry(lo_diag_scall32)
- TIME_TRAP_UENTRY
-
- movl %gs:CPU_KERNEL_STACK,%edi
- xchgl %edi,%esp /* switch to kernel stack */
- movl %gs:CPU_ACTIVE_THREAD,%ecx /* get current thread */
- movl TH_TASK(%ecx),%ebx /* point to current task */
-
- /* Check for active vtimers in the current task */
- TASK_VTIMER_CHECK(%ebx, %ecx)
-
- pushl %edi /* push pbc stack for later */
-
- CCALL1(diagCall, %edi) // Call diagnostics
-
- cli // Disable interruptions just in case
- popl %esp // Get back the original stack
- cmpl $0,%eax // What kind of return is this?
- jne EXT(return_to_user) // Normal return, do not check asts...
-
- CCALL5(i386_exception, $EXC_SYSCALL, $0x6000, $0, $1, $0)
- // pass what would be the diag syscall
- // error return - cause an exception
- /* no return */
-
-
LEXT(return_to_user)
TIME_TRAP_UEXIT
jmp ret_to_user
Entry(mc_task_start)
CCALL1(panic_machine_check32, $(T_MACHINE_CHECK))
hlt
-
-#if MACH_KDB
-#include <i386/lapic.h>
-#define CX(addr,reg) addr(,reg,4)
-#if 0
-/*
- * Note that the per-fault entry points are not currently
- * functional. The only way to make them work would be to
- * set up separate TSS's for each fault type, which doesn't
- * currently seem worthwhile. (The offset part of a task
- * gate is always ignored.) So all faults that task switch
- * currently resume at db_task_start.
- */
-/*
- * Double fault (Murphy's point) - error code (0) on stack
- */
-Entry(db_task_dbl_fault)
- popl %eax
- movl $(T_DOUBLE_FAULT),%ebx
- jmp db_task_start
-/*
- * Segment not present - error code on stack
- */
-Entry(db_task_seg_np)
- popl %eax
- movl $(T_SEGMENT_NOT_PRESENT),%ebx
- jmp db_task_start
-/*
- * Stack fault - error code on (current) stack
- */
-Entry(db_task_stk_fault)
- popl %eax
- movl $(T_STACK_FAULT),%ebx
- jmp db_task_start
-/*
- * General protection fault - error code on stack
- */
-Entry(db_task_gen_prot)
- popl %eax
- movl $(T_GENERAL_PROTECTION),%ebx
- jmp db_task_start
-#endif /* 0 */
-/*
- * The entry point where execution resumes after last-ditch debugger task
- * switch.
- */
-Entry(db_task_start)
- movl %esp,%edx
- subl $(ISS32_SIZE),%edx
- movl %edx,%esp /* allocate x86_saved_state on stack */
- movl %eax,R32_ERR(%esp)
- movl %ebx,R32_TRAPNO(%esp)
- pushl %edx
- CPU_NUMBER(%edx)
- movl CX(EXT(master_dbtss),%edx),%edx
- movl TSS_LINK(%edx),%eax
- pushl %eax /* pass along selector of previous TSS */
- call EXT(db_tss_to_frame)
- popl %eax /* get rid of TSS selector */
- call EXT(db_trap_from_asm)
- addl $0x4,%esp
- /*
- * And now...?
- */
- iret /* ha, ha, ha... */
-#endif /* MACH_KDB */
projects / apple / xnu.git / blobdiff