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| author | Mark Rutland <mark.rutland@arm.com> | 2017-02-09 15:19:21 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-02-15 12:20:29 +0000 |
| commit | ffe7afd1713558d73483834c2e2d03a1e39a4062 (patch) | |
| tree | 069438af466fa596cf4d785a3004ee42cc04daac | |
| parent | 521c646108ed199d19c5c73978aaca3e18ca8f81 (diff) | |
| download | linux-ffe7afd1713558d73483834c2e2d03a1e39a4062.tar.gz linux-ffe7afd1713558d73483834c2e2d03a1e39a4062.tar.xz | |
arm64/kprobes: consistently handle MRS/MSR with XZR
Now that we have XZR-safe helpers for fiddling with registers, use these
in the arm64 kprobes code rather than open-coding the logic.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| -rw-r--r-- | arch/arm64/kernel/probes/simulate-insn.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/arch/arm64/kernel/probes/simulate-insn.c b/arch/arm64/kernel/probes/simulate-insn.c index 357d3efe1366..be05868418ee 100644 --- a/arch/arm64/kernel/probes/simulate-insn.c +++ b/arch/arm64/kernel/probes/simulate-insn.c @@ -17,6 +17,8 @@ #include <linux/kernel.h> #include <linux/kprobes.h> +#include <asm/ptrace.h> + #include "simulate-insn.h" #define bbl_displacement(insn) \ @@ -36,30 +38,22 @@ static inline void set_x_reg(struct pt_regs *regs, int reg, u64 val) { - if (reg < 31) - regs->regs[reg] = val; + pt_regs_write_reg(regs, reg, val); } static inline void set_w_reg(struct pt_regs *regs, int reg, u64 val) { - if (reg < 31) - regs->regs[reg] = lower_32_bits(val); + pt_regs_write_reg(regs, reg, lower_32_bits(val)); } static inline u64 get_x_reg(struct pt_regs *regs, int reg) { - if (reg < 31) - return regs->regs[reg]; - else - return 0; + return pt_regs_read_reg(regs, reg); } static inline u32 get_w_reg(struct pt_regs *regs, int reg) { - if (reg < 31) - return lower_32_bits(regs->regs[reg]); - else - return 0; + return lower_32_bits(pt_regs_read_reg(regs, reg)); } static bool __kprobes check_cbz(u32 opcode, struct pt_regs *regs) |