* 2 of the License, or (at your option) any later version.
*/
-#include <linux/sys.h>
-#include <linux/config.h>
#include <linux/linkage.h>
#include <asm/setup.h>
#include <asm/segment.h>
#include <asm/ptrace.h>
+#include <asm/thread_info.h>
#include <asm/spr-regs.h>
#include <asm/errno.h>
#
.section .bss.stack
.globl __break_user_context
- .balign 8192
+ .balign THREAD_SIZE
__break_stack:
- .space (8192 - (USER_CONTEXT_SIZE + REG__DEBUG_XTRA)) & ~7
-__break_stack_tos:
- .space REG__DEBUG_XTRA
-__break_user_context:
- .space USER_CONTEXT_SIZE
+ .space THREAD_SIZE - FRV_FRAME0_SIZE
+__break_frame_0:
+ .space FRV_FRAME0_SIZE
#
# miscellaneous variables
#endif
LEDS 0x1001,gr31
- sethi.p %hi(__break_user_context),gr31
- setlo %lo(__break_user_context),gr31
+ sethi.p %hi(__break_frame_0),gr31
+ setlo %lo(__break_frame_0),gr31
stdi gr2,@(gr31,#REG_GR(2))
movsg ccr,gr3
movsg bpcsr,gr2
sethi.p %hi(__entry_kernel_external_interrupt),gr3
setlo %lo(__entry_kernel_external_interrupt),gr3
- subcc gr2,gr3,gr0,icc0
+ subcc.p gr2,gr3,gr0,icc0
+ sethi %hi(__entry_uspace_external_interrupt),gr3
+ setlo.p %lo(__entry_uspace_external_interrupt),gr3
beq icc0,#2,__break_step_kernel_external_interrupt
- sethi.p %hi(__entry_uspace_external_interrupt),gr3
- setlo %lo(__entry_uspace_external_interrupt),gr3
- subcc gr2,gr3,gr0,icc0
+ subcc.p gr2,gr3,gr0,icc0
+ sethi %hi(__entry_kernel_external_interrupt_virtually_disabled),gr3
+ setlo.p %lo(__entry_kernel_external_interrupt_virtually_disabled),gr3
beq icc0,#2,__break_step_uspace_external_interrupt
+ subcc.p gr2,gr3,gr0,icc0
+ sethi %hi(__entry_kernel_external_interrupt_virtual_reenable),gr3
+ setlo.p %lo(__entry_kernel_external_interrupt_virtual_reenable),gr3
+ beq icc0,#2,__break_step_kernel_external_interrupt_virtually_disabled
+ subcc gr2,gr3,gr0,icc0
+ beq icc0,#2,__break_step_kernel_external_interrupt_virtual_reenable
LEDS 0x2007,gr2
# step through an external interrupt from kernel mode
.globl __break_step_kernel_external_interrupt
__break_step_kernel_external_interrupt:
+ # deal with virtual interrupt disablement
+ beq icc2,#0,__break_step_kernel_external_interrupt_virtually_disabled
+
sethi.p %hi(__entry_kernel_external_interrupt_reentry),gr3
setlo %lo(__entry_kernel_external_interrupt_reentry),gr3
#endif
rett #1
+# we single-stepped into an interrupt handler whilst interrupts were merely virtually disabled
+# need to really disable interrupts, set flag, fix up and return
+__break_step_kernel_external_interrupt_virtually_disabled:
+ movsg psr,gr2
+ andi gr2,#~PSR_PIL,gr2
+ ori gr2,#PSR_PIL_14,gr2 /* debugging interrupts only */
+ movgs gr2,psr
+
+ ldi @(gr31,#REG_CCR),gr3
+ movgs gr3,ccr
+ subcc.p gr0,gr0,gr0,icc2 /* leave Z set, clear C */
+
+ # exceptions must've been enabled and we must've been in supervisor mode
+ setlos BPSR_BET|BPSR_BS,gr3
+ movgs gr3,bpsr
+
+ # return to where the interrupt happened
+ movsg pcsr,gr2
+ movgs gr2,bpcsr
+
+ lddi.p @(gr31,#REG_GR(2)),gr2
+
+ xor gr31,gr31,gr31
+ movgs gr0,brr
+#ifdef CONFIG_MMU
+ movsg scr3,gr31
+#endif
+ rett #1
+
+# we stepped through into the virtual interrupt reenablement trap
+#
+# we also want to single step anyway, but after fixing up so that we get an event on the
+# instruction after the broken-into exception returns
+ .globl __break_step_kernel_external_interrupt_virtual_reenable
+__break_step_kernel_external_interrupt_virtual_reenable:
+ movsg psr,gr2
+ andi gr2,#~PSR_PIL,gr2
+ movgs gr2,psr
+
+ ldi @(gr31,#REG_CCR),gr3
+ movgs gr3,ccr
+ subicc gr0,#1,gr0,icc2 /* clear Z, set C */
+
+ # save the adjusted ICC2
+ movsg ccr,gr3
+ sti gr3,@(gr31,#REG_CCR)
+
+ # exceptions must've been enabled and we must've been in supervisor mode
+ setlos BPSR_BET|BPSR_BS,gr3
+ movgs gr3,bpsr
+
+ # return to where the trap happened
+ movsg pcsr,gr2
+ movgs gr2,bpcsr
+
+ # and then process the single step
+ bra __break_continue
+
# step through an internal exception from uspace mode
.globl __break_step_uspace_softprog_interrupt
__break_step_uspace_softprog_interrupt:
# set up the kernel stack pointer
sti sp,@(gr31,#REG_SP)
- sethi.p %hi(__break_stack_tos),sp
- setlo %lo(__break_stack_tos),sp
+ sethi.p %hi(__break_frame_0),sp
+ setlo %lo(__break_frame_0),sp
# finish building the exception frame
stdi gr4 ,@(gr31,#REG_GR(4))
movsg nmar,gr5
movsg dcr,gr6
- stdi gr4 ,@(gr31,#REG_BRR)
- sti gr19,@(gr31,#REG_BPSR)
- sti.p gr6 ,@(gr31,#REG_DCR)
+ sethi.p %hi(__debug_status),gr7
+ setlo %lo(__debug_status),gr7
+
+ stdi gr4 ,@(gr7,#DEBUG_BRR)
+ sti gr19,@(gr7,#DEBUG_BPSR)
+ sti.p gr6 ,@(gr7,#DEBUG_DCR)
# trap exceptions during break handling and disable h/w breakpoints/watchpoints
sethi %hi(DCR_EBE),gr5
lddi @(gr31,#REG_PSR) ,gr22
ldi @(gr31,#REG_PC) ,gr21
ldi @(gr31,#REG_TBR) ,gr20
- ldi.p @(gr31,#REG_DCR) ,gr6
+
+ sethi.p %hi(__debug_status),gr6
+ setlo %lo(__debug_status),gr6
+ ldi.p @(gr6,#DEBUG_DCR) ,gr6
andi gr22,#PSR_S,gr19 /* rebuild BPSR */
andi.p gr22,#PSR_ET,gr5
git://git.onelab.eu / linux-2.6.git / blobdiff