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[193.116.127.167]) by smtp.gmail.com with ESMTPSA id t6-20020a1709027fc600b0017534ffd491sm13696816plb.163.2022.09.15.21.08.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Sep 2022 21:08:16 -0700 (PDT) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org, Michael Ellerman , Christophe Leroy Subject: [PATCH v2 4/7] powerpc/build: move .data.rel.ro, .sdata2 to read-only Date: Fri, 16 Sep 2022 14:07:52 +1000 Message-Id: <20220916040755.2398112-5-npiggin@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220916040755.2398112-1-npiggin@gmail.com> References: <20220916040755.2398112-1-npiggin@gmail.com> MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nicholas Piggin Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" .sdata2 is a readonly small data section for ppc32, and .data.rel.ro is data that needs relocating but is read-only after that so these can both be moved to the read only memory region. Signed-off-by: Nicholas Piggin --- arch/powerpc/kernel/vmlinux.lds.S | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 16c4389d498d..ae0814063900 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -131,6 +131,16 @@ SECTIONS /* Read-only data */ RO_DATA(PAGE_SIZE) +#ifdef CONFIG_PPC32 + .sdata2 : AT(ADDR(.sdata2) - LOAD_OFFSET) { + *(.sdata2) + } +#endif + + .data.rel.ro : AT(ADDR(.data.rel.ro) - LOAD_OFFSET) { + *(.data.rel.ro*) + } + .branch_lt : AT(ADDR(.branch_lt) - LOAD_OFFSET) { *(.branch_lt) } @@ -348,19 +358,13 @@ SECTIONS . = ALIGN(PAGE_SIZE); _sdata = .; -#ifdef CONFIG_PPC32 .data : AT(ADDR(.data) - LOAD_OFFSET) { DATA_DATA *(.data.rel*) +#ifdef CONFIG_PPC32 *(SDATA_MAIN) - *(.sdata2) - } -#else - .data : AT(ADDR(.data) - LOAD_OFFSET) { - DATA_DATA - *(.data.rel*) - } #endif + } /* The initial task and kernel stack */ INIT_TASK_DATA_SECTION(THREAD_ALIGN)