linux-kernel - [PATCH v5 2/4] openrisc: Add R_OR1K_32_PCREL relocation type module support

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Message-ID: <20250905181258.9430-3-chenmiao.ku@gmail.com>
Date: Fri,  5 Sep 2025 18:12:56 +0000
From: ChenMiao <chenmiao.ku@...il.com>
To: Stafford Horne <shorne@...il.com>
Cc: Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux OpenRISC <linux-openrisc@...r.kernel.org>,
	chenmiao <chenmiao.ku@...il.com>
Subject: [PATCH v5 2/4] openrisc: Add R_OR1K_32_PCREL relocation type module support

From: chenmiao <chenmiao.ku@...il.com>

To ensure the proper functioning of the jump_label test module, this patch
adds support for the R_OR1K_32_PCREL relocation type for any modules. The
implementation calculates the PC-relative offset by subtracting the
instruction location from the target value and stores the result at the
specified location.

Signed-off-by: chenmiao <chenmiao.ku@...il.com>
---
 arch/openrisc/kernel/module.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/openrisc/kernel/module.c b/arch/openrisc/kernel/module.c
index c9ff4c4a0b29..4ac4fbaa827c 100644
--- a/arch/openrisc/kernel/module.c
+++ b/arch/openrisc/kernel/module.c
@@ -55,6 +55,10 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
 			value |= *location & 0xfc000000;
 			*location = value;
 			break;
+		case R_OR1K_32_PCREL:
+			value -= (uint32_t)location;
+			*location = value;
+			break;
 		case R_OR1K_AHI16:
 			/* Adjust the operand to match with a signed LO16.  */
 			value += 0x8000;
-- 
2.45.2