diff options
Diffstat (limited to 'arch/arc/kernel/disasm.c')
| -rw-r--r-- | arch/arc/kernel/disasm.c | 78 |
1 files changed, 67 insertions, 11 deletions
diff --git a/arch/arc/kernel/disasm.c b/arch/arc/kernel/disasm.c index b8a549c4f540..ccc7e8c39eb3 100644 --- a/arch/arc/kernel/disasm.c +++ b/arch/arc/kernel/disasm.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * several functions that help interpret ARC instructions * used for unaligned accesses, kprobes and kgdb * * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/types.h> @@ -15,7 +12,7 @@ #include <linux/uaccess.h> #include <asm/disasm.h> -#if defined(CONFIG_KGDB) || defined(CONFIG_ARC_MISALIGN_ACCESS) || \ +#if defined(CONFIG_KGDB) || defined(CONFIG_ARC_EMUL_UNALIGNED) || \ defined(CONFIG_KPROBES) /* disasm_instr: Analyses instruction at addr, stores @@ -342,7 +339,7 @@ void __kprobes disasm_instr(unsigned long addr, struct disasm_state *state, case op_LDWX_S: /* LDWX_S c, [b, u6] */ state->x = 1; - /* intentional fall-through */ + fallthrough; case op_LDW_S: /* LDW_S c, [b, u6] */ state->zz = 2; @@ -369,7 +366,7 @@ void __kprobes disasm_instr(unsigned long addr, struct disasm_state *state, case op_SP: /* LD_S|LDB_S b,[sp,u7], ST_S|STB_S b,[sp,u7] */ /* note: we are ignoring possibility of: * ADD_S, SUB_S, PUSH_S, POP_S as these should not - * cause unaliged exception anyway */ + * cause unaligned exception anyway */ state->write = BITS(state->words[0], 6, 6); state->zz = BITS(state->words[0], 5, 5); if (state->zz) @@ -437,14 +434,31 @@ long __kprobes get_reg(int reg, struct pt_regs *regs, { long *p; +#if defined(CONFIG_ISA_ARCOMPACT) if (reg <= 12) { p = ®s->r0; return p[-reg]; } +#else /* CONFIG_ISA_ARCV2 */ + if (reg <= 11) { + p = ®s->r0; + return p[reg]; + } + if (reg == 12) + return regs->r12; + if (reg == 30) + return regs->r30; +#ifdef CONFIG_ARC_HAS_ACCL_REGS + if (reg == 58) + return regs->r58; + if (reg == 59) + return regs->r59; +#endif +#endif if (cregs && (reg <= 25)) { p = &cregs->r13; - return p[13-reg]; + return p[13 - reg]; } if (reg == 26) @@ -464,6 +478,7 @@ void __kprobes set_reg(int reg, long val, struct pt_regs *regs, { long *p; +#if defined(CONFIG_ISA_ARCOMPACT) switch (reg) { case 0 ... 12: p = ®s->r0; @@ -472,7 +487,37 @@ void __kprobes set_reg(int reg, long val, struct pt_regs *regs, case 13 ... 25: if (cregs) { p = &cregs->r13; - p[13-reg] = val; + p[13 - reg] = val; + } + break; + case 26: + regs->r26 = val; + break; + case 27: + regs->fp = val; + break; + case 28: + regs->sp = val; + break; + case 31: + regs->blink = val; + break; + default: + break; + } +#else /* CONFIG_ISA_ARCV2 */ + switch (reg) { + case 0 ... 11: + p = ®s->r0; + p[reg] = val; + break; + case 12: + regs->r12 = val; + break; + case 13 ... 25: + if (cregs) { + p = &cregs->r13; + p[13 - reg] = val; } break; case 26: @@ -484,12 +529,24 @@ void __kprobes set_reg(int reg, long val, struct pt_regs *regs, case 28: regs->sp = val; break; + case 30: + regs->r30 = val; + break; case 31: regs->blink = val; break; +#ifdef CONFIG_ARC_HAS_ACCL_REGS + case 58: + regs->r58 = val; + break; + case 59: + regs->r59 = val; + break; +#endif default: break; } +#endif } /* @@ -506,7 +563,6 @@ int __kprobes disasm_next_pc(unsigned long pc, struct pt_regs *regs, { struct disasm_state instr; - memset(&instr, 0, sizeof(struct disasm_state)); disasm_instr(pc, &instr, 0, regs, cregs); *next_pc = pc + instr.instr_len; @@ -535,4 +591,4 @@ int __kprobes disasm_next_pc(unsigned long pc, struct pt_regs *regs, return instr.is_branch; } -#endif /* CONFIG_KGDB || CONFIG_ARC_MISALIGN_ACCESS || CONFIG_KPROBES */ +#endif /* CONFIG_KGDB || CONFIG_ARC_EMUL_UNALIGNED || CONFIG_KPROBES */ |