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Commit b7300d4c authored by Will Deacon's avatar Will Deacon
Browse files

arm64: traps: Pretty-print pstate in register dumps 



We can decode the PSTATE easily enough, so pretty-print it in register
dumps.

Tested-by: default avatarLaura Abbott <labbott@redhat.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent a25ffd3a

arch/arm64/kernel/process.c

+35 −1
Original line number Diff line number Diff line
@@ -170,6 +170,39 @@ void machine_restart(char *cmd) 
	while (1);

}



static void print_pstate(struct pt_regs *regs)

{

	u64 pstate = regs->pstate;



	if (compat_user_mode(regs)) {

		printk("pstate: %08llx (%c%c%c%c %c %s %s %c%c%c)\n",

			pstate,

			pstate & COMPAT_PSR_N_BIT ? 'N' : 'n',

			pstate & COMPAT_PSR_Z_BIT ? 'Z' : 'z',

			pstate & COMPAT_PSR_C_BIT ? 'C' : 'c',

			pstate & COMPAT_PSR_V_BIT ? 'V' : 'v',

			pstate & COMPAT_PSR_Q_BIT ? 'Q' : 'q',

			pstate & COMPAT_PSR_T_BIT ? "T32" : "A32",

			pstate & COMPAT_PSR_E_BIT ? "BE" : "LE",

			pstate & COMPAT_PSR_A_BIT ? 'A' : 'a',

			pstate & COMPAT_PSR_I_BIT ? 'I' : 'i',

			pstate & COMPAT_PSR_F_BIT ? 'F' : 'f');

	} else {

		printk("pstate: %08llx (%c%c%c%c %c%c%c%c %cPAN %cUAO)\n",

			pstate,

			pstate & PSR_N_BIT ? 'N' : 'n',

			pstate & PSR_Z_BIT ? 'Z' : 'z',

			pstate & PSR_C_BIT ? 'C' : 'c',

			pstate & PSR_V_BIT ? 'V' : 'v',

			pstate & PSR_D_BIT ? 'D' : 'd',

			pstate & PSR_A_BIT ? 'A' : 'a',

			pstate & PSR_I_BIT ? 'I' : 'i',

			pstate & PSR_F_BIT ? 'F' : 'f',

			pstate & PSR_PAN_BIT ? '+' : '-',

			pstate & PSR_UAO_BIT ? '+' : '-');

	}

}



void __show_regs(struct pt_regs *regs)

{

	int i, top_reg;
@@ -186,9 +219,10 @@ void __show_regs(struct pt_regs *regs) 
	}



	show_regs_print_info(KERN_DEFAULT);

	print_pstate(regs);

	print_symbol("pc : %s\n", regs->pc);

	print_symbol("lr : %s\n", lr);

	printk("sp : %016llx pstate : %08llx\n", sp, regs->pstate);

	printk("sp : %016llx\n", sp);



	i = top_reg;