diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 30 | ||||
| -rw-r--r-- | arch/microblaze/kernel/exceptions.c | 8 |
2 files changed, 19 insertions, 19 deletions
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S index 397754cd31c..5a5cb584293 100644 --- a/arch/microblaze/kernel/entry.S +++ b/arch/microblaze/kernel/entry.S @@ -778,19 +778,22 @@ C_ENTRY(_debug_exception): addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */ SAVE_REGS; + swi r17, r1, PTO+PT_R17; + swi r16, r1, PTO+PT_R16; + swi r16, r1, PTO+PT_PC; /* Save LP */ swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */ lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); swi r11, r1, PTO+PT_R1; /* Store user SP. */ -2: +2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); tovirt(r1,r1) set_vms; - addi r5, r0, SIGTRAP /* send the trap signal */ - add r6, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - addk r7, r0, r0 /* 3rd param zero */ -dbtrap_call: rtbd r0, send_sig; + addik r5, r1, PTO; addik r15, r0, dbtrap_call; +dbtrap_call: /* return point for kernel/user entry */ + rtbd r0, sw_exception + nop set_bip; /* Ints masked for state restore*/ lwi r11, r1, PTO + PT_MODE; @@ -838,6 +841,8 @@ dbtrap_call: rtbd r0, send_sig; tophys(r1,r1); RESTORE_REGS + lwi r17, r1, PTO+PT_R17; + lwi r16, r1, PTO+PT_R16; addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ @@ -854,11 +859,10 @@ dbtrap_call: rtbd r0, send_sig; tovirt(r1,r1); 6: DBTRAP_return: /* Make global symbol for debugging */ - rtbd r14, 0; /* Instructions to return from an IRQ */ + rtbd r16, 0; /* Instructions to return from an IRQ */ nop; - ENTRY(_switch_to) /* prepare return value */ addk r3, r0, CURRENT_TASK @@ -946,13 +950,6 @@ ENTRY(_switch_to) ENTRY(_reset) brai 0x70; /* Jump back to FS-boot */ -ENTRY(_break) - mfs r5, rmsr - swi r5, r0, 0x250 + TOPHYS(r0_ram) - mfs r5, resr - swi r5, r0, 0x254 + TOPHYS(r0_ram) - bri 0 - /* These are compiled and loaded into high memory, then * copied into place in mach_early_setup */ .section .init.ivt, "ax" @@ -964,12 +961,9 @@ ENTRY(_break) nop brai TOPHYS(_user_exception); /* syscall handler */ brai TOPHYS(_interrupt); /* Interrupt handler */ - brai TOPHYS(_break); /* nmi trap handler */ + brai TOPHYS(_debug_exception); /* debug trap handler */ brai TOPHYS(_hw_exception_handler); /* HW exception handler */ - .org 0x60 - brai TOPHYS(_debug_exception); /* debug trap handler*/ - .section .rodata,"a" #include "syscall_table.S" diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c index 02cbdfe5aa8..e0c6f8c2bd9 100644 --- a/arch/microblaze/kernel/exceptions.c +++ b/arch/microblaze/kernel/exceptions.c @@ -48,6 +48,12 @@ void die(const char *str, struct pt_regs *fp, long err) do_exit(err); } +/* for user application debugging */ +void sw_exception(struct pt_regs *regs) +{ + _exception(SIGTRAP, regs, TRAP_BRKPT, regs->r16); +} + void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr) { siginfo_t info; @@ -143,7 +149,7 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, #ifdef CONFIG_MMU case MICROBLAZE_PRIVILEGED_EXCEPTION: pr_debug(KERN_WARNING "Privileged exception\n"); - /* "brk r0,r0" - used as debug breakpoint */ + /* "brk r0,r0" - used as debug breakpoint - old toolchain */ if (get_user(code, (unsigned long *)regs->pc) == 0 && code == 0x980c0000) { _exception(SIGTRAP, regs, TRAP_BRKPT, addr); |