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powerpc: do_break get registers from regs 

Similar to the previous patch this makes interrupt handler function
types more regular so they can be wrapped with the next patch.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210130130852.2952424-9-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2021-01-30 23:08:18 +10:00 committed by Michael Ellerman
parent b4ced80310
commit 18722ecf9e
3 changed files with 6 additions and 9 deletions
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3
arch/powerpc/include/asm/debug.h
View File

@ -52,8 +52,7 @@ extern void do_send_trap(struct pt_regs *regs, unsigned long address,
unsigned long error_code, int brkpt);
#else
extern void do_break(struct pt_regs *regs, unsigned long address,
unsigned long error_code);
void do_break(struct pt_regs *regs);
#endif
#endif /* _ASM_POWERPC_DEBUG_H */

5
arch/powerpc/kernel/head_8xx.S
View File

@ -364,10 +364,9 @@ do_databreakpoint:
addi r3,r1,STACK_FRAME_OVERHEAD
mfspr r4,SPRN_BAR
stw r4,_DAR(r11)
#ifdef CONFIG_VMAP_STACK
lwz r5,_DSISR(r11)
#else
#ifndef CONFIG_VMAP_STACK
mfspr r5,SPRN_DSISR
stw r5,_DSISR(r11)
#endif
EXC_XFER_STD(0x1c00, do_break)

7
arch/powerpc/kernel/process.c
View File

@ -659,11 +659,10 @@ static void do_break_handler(struct pt_regs *regs)
}
}
void do_break (struct pt_regs *regs, unsigned long address,
unsigned long error_code)
void do_break(struct pt_regs *regs)
{
current->thread.trap_nr = TRAP_HWBKPT;
if (notify_die(DIE_DABR_MATCH, "dabr_match", regs, error_code,
if (notify_die(DIE_DABR_MATCH, "dabr_match", regs, regs->dsisr,
11, SIGSEGV) == NOTIFY_STOP)
return;
@ -681,7 +680,7 @@ void do_break (struct pt_regs *regs, unsigned long address,
do_break_handler(regs);
/* Deliver the signal to userspace */
force_sig_fault(SIGTRAP, TRAP_HWBKPT, (void __user *)address);
force_sig_fault(SIGTRAP, TRAP_HWBKPT, (void __user *)regs->dar);
}
#endif /* CONFIG_PPC_ADV_DEBUG_REGS */