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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>
This commit is contained in:
Sergey Matyukevich 2022-04-14 11:17:24 +03:00 committed by Vineet Gupta
parent fb0b54909b
commit 9a78a8a8bb
1 changed files with 62 additions and 2 deletions
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64
arch/arc/kernel/disasm.c
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@ -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 = &regs->r0;
return p[-reg];
}
#else /* CONFIG_ISA_ARCV2 */
if (reg <= 11) {
p = &regs->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 = &regs->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 = &regs->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
}
/*