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| author | Sergey Matyukevich <sergey.matyukevich@synopsys.com> | 2022-04-14 11:17:24 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@kernel.org> | 2022-04-26 19:34:42 +0300 |
| commit | 9a78a8a8bb582743ce6747d978b58360c3c599d9 (patch) | |
| tree | 09e26a6dab33fd24e5c4363a85ec611b99a9e862 | |
| parent | fb0b54909b153ac6195378fa8ddee3f7531f8e51 (diff) | |
| download | linux-9a78a8a8bb582743ce6747d978b58360c3c599d9.tar.xz | |
ARC: disasm: handle ARCv2 case in kprobe get/set functions
Current implementation of get_reg/set_reg implies ARCompact layout
of pt_regs structure. Meanwhile pt_regs structure differs between
ARCompact and ARCv2. Update those functions to handle ARCv2.
Tested-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
| -rw-r--r-- | arch/arc/kernel/disasm.c | 64 |
1 files changed, 62 insertions, 2 deletions
diff --git a/arch/arc/kernel/disasm.c b/arch/arc/kernel/disasm.c index 1e1db51b6941..ccc7e8c39eb3 100644 --- a/arch/arc/kernel/disasm.c +++ b/arch/arc/kernel/disasm.c @@ -434,14 +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) @@ -461,6 +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; @@ -469,7 +487,7 @@ 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: @@ -487,6 +505,48 @@ void __kprobes set_reg(int reg, long val, struct pt_regs *regs, 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: + regs->r26 = val; + break; + case 27: + regs->fp = val; + break; + 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 } /* |