diff options
| author | Will Deacon <will.deacon@arm.com> | 2017-10-19 13:26:26 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-10-27 16:26:58 +0100 |
| commit | b7300d4c035cc98c7f5c40e2c4e53f58c16617ea (patch) | |
| tree | 3c19cbd6b789ba1ca3620f0163dbaa6318470911 /arch/arm64/kernel | |
| parent | a25ffd3a6302a67814280274d8f1aa4ae2ea4b59 (diff) | |
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>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/process.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index c20896b8fb2d..c15ec41e9f84 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -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; |