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authorSergey Matyukevich <sergey.matyukevich@synopsys.com>2022-04-14 11:17:24 +0300
committerVineet Gupta <vgupta@kernel.org>2022-04-26 19:34:42 +0300
commit9a78a8a8bb582743ce6747d978b58360c3c599d9 (patch)
tree09e26a6dab33fd24e5c4363a85ec611b99a9e862 /arch/arc
parentfb0b54909b153ac6195378fa8ddee3f7531f8e51 (diff)
downloadlinux-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>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/kernel/disasm.c64
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 = &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
}
/*