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arm64: traps: Pretty-print pstate in register dumps 

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

Tested-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2017-10-19 13:26:26 +01:00
parent a25ffd3a63
commit b7300d4c03
1 changed files with 35 additions and 1 deletions
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36
arch/arm64/kernel/process.c
View File

@ -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;