diff options
Diffstat (limited to 'arch/riscv/lib/interrupts.c')
| -rw-r--r-- | arch/riscv/lib/interrupts.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/riscv/lib/interrupts.c b/arch/riscv/lib/interrupts.c index 7525c152b8..100be2e966 100644 --- a/arch/riscv/lib/interrupts.c +++ b/arch/riscv/lib/interrupts.c @@ -51,6 +51,38 @@ static void show_regs(struct pt_regs *regs) #endif } +/** + * instr_len() - get instruction length + * + * @i: low 16 bits of the instruction + * Return: number of u16 in instruction + */ +static int instr_len(u16 i) +{ + if ((i & 0x03) != 0x03) + return 1; + /* Instructions with more than 32 bits are not yet specified */ + return 2; +} + +/** + * show_code() - display code leading to exception + * + * @epc: program counter + */ +static void show_code(ulong epc) +{ + u16 *pos = (u16 *)(epc & ~1UL); + int i, len = instr_len(*pos); + + printf("\nCode: "); + for (i = -8; i; ++i) + printf("%04x ", pos[i]); + printf("("); + for (i = 0; i < len; ++i) + printf("%04x%s", pos[i], i + 1 == len ? ")\n" : " "); +} + static void _exit_trap(ulong code, ulong epc, ulong tval, struct pt_regs *regs) { static const char * const exception_code[] = { @@ -85,6 +117,7 @@ static void _exit_trap(ulong code, ulong epc, ulong tval, struct pt_regs *regs) epc - gd->reloc_off, regs->ra - gd->reloc_off); show_regs(regs); + show_code(epc); show_efi_loaded_images(epc); panic("\n"); } |