linux-kernel - [PATCH 10/11] riscv: kprobes: Remove duplication of RV_EXTRACT_UTYPE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <e1e26af7130aa39ce4c8c99e50038273fa32a1ee.1746997351.git.namcao@linutronix.de>
Date: Sun, 11 May 2025 23:18:02 +0200
From: Nam Cao <namcao@...utronix.de>
To: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: Nam Cao <namcao@...utronix.de>
Subject: [PATCH 10/11] riscv: kprobes: Remove duplication of RV_EXTRACT_UTYPE_IMM

Use RV_EXTRACT_UTYPE_IMM, instead of reimplementing it in simulate_auipc().

Signed-off-by: Nam Cao <namcao@...utronix.de>
---
 arch/riscv/kernel/probes/simulate-insn.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/arch/riscv/kernel/probes/simulate-insn.c b/arch/riscv/kernel/probes/simulate-insn.c
index 1717df780409..2b3cd69d6f8e 100644
--- a/arch/riscv/kernel/probes/simulate-insn.c
+++ b/arch/riscv/kernel/probes/simulate-insn.c
@@ -81,17 +81,6 @@ bool __kprobes simulate_jalr(u32 opcode, unsigned long addr, struct pt_regs *reg
 	return ret;
 }
 
-#define auipc_imm(opcode) \
-	((((opcode) >> 12) & 0xfffff) << 12)
-
-#if __riscv_xlen == 64
-#define auipc_offset(opcode)	sign_extend64(auipc_imm(opcode), 31)
-#elif __riscv_xlen == 32
-#define auipc_offset(opcode)	auipc_imm(opcode)
-#else
-#error "Unexpected __riscv_xlen"
-#endif
-
 bool __kprobes simulate_auipc(u32 opcode, unsigned long addr, struct pt_regs *regs)
 {
 	/*
@@ -102,7 +91,7 @@ bool __kprobes simulate_auipc(u32 opcode, unsigned long addr, struct pt_regs *re
 	 */
 
 	u32 rd_idx = RV_EXTRACT_RD_REG(opcode);
-	unsigned long rd_val = addr + auipc_offset(opcode);
+	unsigned long rd_val = addr + (s32)RV_EXTRACT_UTYPE_IMM(opcode);
 
 	if (!rv_insn_reg_set_val(regs, rd_idx, rd_val))
 		return false;
-- 
2.39.5