From 441110a547f86a2fd0c40bf04b274853622c53cc Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 29 Oct 2019 14:13:30 -0700 Subject: vmlinux.lds.h: Provide EMIT_PT_NOTE to indicate export of .notes In preparation for moving NOTES into RO_DATA, provide a mechanism for architectures that want to emit a PT_NOTE Program Header to do so. Signed-off-by: Kees Cook Signed-off-by: Borislav Petkov Acked-by: Heiko Carstens # s390 Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Dave Hansen Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman Cc: Michal Simek Cc: Rick Edgecombe Cc: Segher Boessenkool Cc: Will Deacon Cc: x86-ml Cc: Yoshinori Sato Link: https://lkml.kernel.org/r/20191029211351.13243-9-keescook@chromium.org --- include/asm-generic/vmlinux.lds.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index dae64600ccbf..f5dd45ce73f1 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -54,6 +54,14 @@ #define LOAD_OFFSET 0 #endif +/* + * Only some architectures want to have the .notes segment visible in + * a separate PT_NOTE ELF Program Header. + */ +#ifdef EMITS_PT_NOTE +#define NOTES_HEADERS :text :note +#endif + /* Align . to a 8 byte boundary equals to maximum function alignment. */ #define ALIGN_FUNCTION() . = ALIGN(8) -- cgit v1.2.3-59-g8ed1b From fbe6a8e618a2d70621cff277e24f6eb338d3d149 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 29 Oct 2019 14:13:31 -0700 Subject: vmlinux.lds.h: Move Program Header restoration into NOTES macro In preparation for moving NOTES into RO_DATA, make the Program Header assignment restoration be part of the NOTES macro itself. Signed-off-by: Kees Cook Signed-off-by: Borislav Petkov Acked-by: Heiko Carstens # s390 Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Dave Hansen Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman Cc: Michal Simek Cc: Rick Edgecombe Cc: Segher Boessenkool Cc: Will Deacon Cc: x86-ml Cc: Yoshinori Sato Link: https://lkml.kernel.org/r/20191029211351.13243-10-keescook@chromium.org --- arch/alpha/kernel/vmlinux.lds.S | 5 +---- arch/ia64/kernel/vmlinux.lds.S | 4 +--- arch/mips/kernel/vmlinux.lds.S | 3 +-- arch/powerpc/kernel/vmlinux.lds.S | 4 +--- arch/s390/kernel/vmlinux.lds.S | 4 +--- arch/x86/kernel/vmlinux.lds.S | 3 +-- include/asm-generic/vmlinux.lds.h | 13 +++++++++++-- 7 files changed, 17 insertions(+), 19 deletions(-) (limited to 'include/asm-generic') diff --git a/arch/alpha/kernel/vmlinux.lds.S b/arch/alpha/kernel/vmlinux.lds.S index 363a60ba7c31..cdfdc91ce64c 100644 --- a/arch/alpha/kernel/vmlinux.lds.S +++ b/arch/alpha/kernel/vmlinux.lds.S @@ -34,10 +34,7 @@ SECTIONS swapper_pg_dir = SWAPPER_PGD; _etext = .; /* End of text section */ - NOTES :text :note - .dummy : { - *(.dummy) - } :text + NOTES RODATA EXCEPTION_TABLE(16) diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S index 7cf4958b732d..bfc937ec168c 100644 --- a/arch/ia64/kernel/vmlinux.lds.S +++ b/arch/ia64/kernel/vmlinux.lds.S @@ -70,9 +70,7 @@ SECTIONS { /* * Read-only data */ - NOTES :text :note /* put .notes in text and mark in PT_NOTE */ - code_continues : { - } :text /* switch back to regular program... */ + NOTES EXCEPTION_TABLE(16) diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S index 1c95612eb800..6a22f531d815 100644 --- a/arch/mips/kernel/vmlinux.lds.S +++ b/arch/mips/kernel/vmlinux.lds.S @@ -81,8 +81,7 @@ SECTIONS __stop___dbe_table = .; } - NOTES NOTES_HEADERS - .dummy : { *(.dummy) } :text + NOTES _sdata = .; /* Start of data section */ RODATA diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 7e26e20c8324..4f19d814d592 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -164,9 +164,7 @@ SECTIONS #endif EXCEPTION_TABLE(0) - NOTES :text :note - /* Restore program header away from PT_NOTE. */ - .dummy : { *(.dummy) } :text + NOTES /* * Init sections discarded at runtime diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index 646d939346df..f88eedeb915a 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -52,9 +52,7 @@ SECTIONS _etext = .; /* End of text section */ } :text = 0x0700 - NOTES :text :note - - .dummy : { *(.dummy) } :text + NOTES RO_DATA_SECTION(PAGE_SIZE) diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index 2e18bf5c1aed..8be25b09c2b7 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -148,8 +148,7 @@ SECTIONS _etext = .; } :text = 0x9090 - NOTES :text :note - .dummy : { *(.dummy) } :text + NOTES EXCEPTION_TABLE(16) diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index f5dd45ce73f1..97d4299f14dc 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -56,10 +56,18 @@ /* * Only some architectures want to have the .notes segment visible in - * a separate PT_NOTE ELF Program Header. + * a separate PT_NOTE ELF Program Header. When this happens, it needs + * to be visible in both the kernel text's PT_LOAD and the PT_NOTE + * Program Headers. In this case, though, the PT_LOAD needs to be made + * the default again so that all the following sections don't also end + * up in the PT_NOTE Program Header. */ #ifdef EMITS_PT_NOTE #define NOTES_HEADERS :text :note +#define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text +#else +#define NOTES_HEADERS +#define NOTES_HEADERS_RESTORE #endif /* Align . to a 8 byte boundary equals to maximum function alignment. */ @@ -798,7 +806,8 @@ __start_notes = .; \ KEEP(*(.note.*)) \ __stop_notes = .; \ - } + } NOTES_HEADERS \ + NOTES_HEADERS_RESTORE #define INIT_SETUP(initsetup_align) \ . = ALIGN(initsetup_align); \ -- cgit v1.2.3-59-g8ed1b From eaf937075c9a42eb8ba51eb3050773d7205d3595 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 29 Oct 2019 14:13:32 -0700 Subject: vmlinux.lds.h: Move NOTES into RO_DATA The .notes section should be non-executable read-only data. As such, move it to the RO_DATA macro instead of being per-architecture defined. Signed-off-by: Kees Cook Signed-off-by: Borislav Petkov Acked-by: Heiko Carstens # s390 Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Dave Hansen Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman Cc: Michal Simek Cc: Rick Edgecombe Cc: Segher Boessenkool Cc: Will Deacon Cc: x86-ml Cc: Yoshinori Sato Link: https://lkml.kernel.org/r/20191029211351.13243-11-keescook@chromium.org --- arch/alpha/kernel/vmlinux.lds.S | 2 -- arch/arc/kernel/vmlinux.lds.S | 2 -- arch/arm/kernel/vmlinux-xip.lds.S | 2 -- arch/arm/kernel/vmlinux.lds.S | 2 -- arch/arm64/kernel/vmlinux.lds.S | 1 - arch/c6x/kernel/vmlinux.lds.S | 1 - arch/csky/kernel/vmlinux.lds.S | 1 - arch/h8300/kernel/vmlinux.lds.S | 1 - arch/hexagon/kernel/vmlinux.lds.S | 1 - arch/ia64/kernel/vmlinux.lds.S | 2 -- arch/microblaze/kernel/vmlinux.lds.S | 1 - arch/mips/kernel/vmlinux.lds.S | 2 -- arch/nds32/kernel/vmlinux.lds.S | 1 - arch/nios2/kernel/vmlinux.lds.S | 1 - arch/openrisc/kernel/vmlinux.lds.S | 1 - arch/parisc/kernel/vmlinux.lds.S | 1 - arch/powerpc/kernel/vmlinux.lds.S | 2 -- arch/riscv/kernel/vmlinux.lds.S | 1 - arch/s390/kernel/vmlinux.lds.S | 2 -- arch/sh/kernel/vmlinux.lds.S | 1 - arch/sparc/kernel/vmlinux.lds.S | 1 - arch/um/include/asm/common.lds.S | 1 - arch/unicore32/kernel/vmlinux.lds.S | 1 - arch/x86/kernel/vmlinux.lds.S | 2 -- arch/xtensa/kernel/vmlinux.lds.S | 1 - include/asm-generic/vmlinux.lds.h | 9 +++++---- 26 files changed, 5 insertions(+), 38 deletions(-) (limited to 'include/asm-generic') diff --git a/arch/alpha/kernel/vmlinux.lds.S b/arch/alpha/kernel/vmlinux.lds.S index cdfdc91ce64c..bf28043485f6 100644 --- a/arch/alpha/kernel/vmlinux.lds.S +++ b/arch/alpha/kernel/vmlinux.lds.S @@ -34,8 +34,6 @@ SECTIONS swapper_pg_dir = SWAPPER_PGD; _etext = .; /* End of text section */ - NOTES - RODATA EXCEPTION_TABLE(16) diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S index 6c693a9d29b6..1d6eef4b6976 100644 --- a/arch/arc/kernel/vmlinux.lds.S +++ b/arch/arc/kernel/vmlinux.lds.S @@ -118,8 +118,6 @@ SECTIONS /DISCARD/ : { *(.eh_frame) } #endif - NOTES - . = ALIGN(PAGE_SIZE); _end = . ; diff --git a/arch/arm/kernel/vmlinux-xip.lds.S b/arch/arm/kernel/vmlinux-xip.lds.S index 8c74037ade22..d2a9651c24ad 100644 --- a/arch/arm/kernel/vmlinux-xip.lds.S +++ b/arch/arm/kernel/vmlinux-xip.lds.S @@ -70,8 +70,6 @@ SECTIONS ARM_UNWIND_SECTIONS #endif - NOTES - _etext = .; /* End of text and rodata section */ ARM_VECTORS diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index 23150c0f0f4d..068db6860867 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -81,8 +81,6 @@ SECTIONS ARM_UNWIND_SECTIONS #endif - NOTES - #ifdef CONFIG_STRICT_KERNEL_RWX . = ALIGN(1< Date: Tue, 29 Oct 2019 14:13:33 -0700 Subject: vmlinux.lds.h: Replace RODATA with RO_DATA There's no reason to keep the RODATA macro: replace the callers with the expected RO_DATA macro. Signed-off-by: Kees Cook Signed-off-by: Borislav Petkov Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Dave Hansen Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman Cc: Michal Simek Cc: Rick Edgecombe Cc: Segher Boessenkool Cc: Will Deacon Cc: x86-ml Cc: Yoshinori Sato Link: https://lkml.kernel.org/r/20191029211351.13243-12-keescook@chromium.org --- arch/alpha/kernel/vmlinux.lds.S | 2 +- arch/ia64/kernel/vmlinux.lds.S | 2 +- arch/microblaze/kernel/vmlinux.lds.S | 2 +- arch/mips/kernel/vmlinux.lds.S | 2 +- arch/um/include/asm/common.lds.S | 2 +- arch/xtensa/kernel/vmlinux.lds.S | 2 +- include/asm-generic/vmlinux.lds.h | 4 +--- 7 files changed, 7 insertions(+), 9 deletions(-) (limited to 'include/asm-generic') diff --git a/arch/alpha/kernel/vmlinux.lds.S b/arch/alpha/kernel/vmlinux.lds.S index bf28043485f6..af411817dd7d 100644 --- a/arch/alpha/kernel/vmlinux.lds.S +++ b/arch/alpha/kernel/vmlinux.lds.S @@ -34,7 +34,7 @@ SECTIONS swapper_pg_dir = SWAPPER_PGD; _etext = .; /* End of text section */ - RODATA + RO_DATA(4096) EXCEPTION_TABLE(16) /* Will be freed after init */ diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S index fae077595756..11d5115bc44d 100644 --- a/arch/ia64/kernel/vmlinux.lds.S +++ b/arch/ia64/kernel/vmlinux.lds.S @@ -104,7 +104,7 @@ SECTIONS { code_continues2 : { } :text - RODATA + RO_DATA(4096) .opd : AT(ADDR(.opd) - LOAD_OFFSET) { __start_opd = .; diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S index d008e50bb212..2299694748ea 100644 --- a/arch/microblaze/kernel/vmlinux.lds.S +++ b/arch/microblaze/kernel/vmlinux.lds.S @@ -51,7 +51,7 @@ SECTIONS { } . = ALIGN(16); - RODATA + RO_DATA(4096) EXCEPTION_TABLE(16) /* diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S index 91e566defc16..a5f00ec73ea6 100644 --- a/arch/mips/kernel/vmlinux.lds.S +++ b/arch/mips/kernel/vmlinux.lds.S @@ -82,7 +82,7 @@ SECTIONS } _sdata = .; /* Start of data section */ - RODATA + RO_DATA(4096) /* writeable */ .data : { /* Data */ diff --git a/arch/um/include/asm/common.lds.S b/arch/um/include/asm/common.lds.S index 91aca356095f..7145ce699982 100644 --- a/arch/um/include/asm/common.lds.S +++ b/arch/um/include/asm/common.lds.S @@ -9,7 +9,7 @@ _sdata = .; PROVIDE (sdata = .); - RODATA + RO_DATA(4096) .unprotected : { *(.unprotected) } . = ALIGN(4096); diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S index a0a843745695..b97e5798b9cf 100644 --- a/arch/xtensa/kernel/vmlinux.lds.S +++ b/arch/xtensa/kernel/vmlinux.lds.S @@ -124,7 +124,7 @@ SECTIONS . = ALIGN(16); - RODATA + RO_DATA(4096) /* Relocation table */ diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index dc3390ec6b60..a0a989fbe411 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -518,9 +518,7 @@ . = ALIGN((align)); \ __end_rodata = .; -/* RODATA & RO_DATA provided for backward compatibility. - * All archs are supposed to use RO_DATA() */ -#define RODATA RO_DATA_SECTION(4096) +/* All archs are supposed to use RO_DATA() */ #define RO_DATA(align) RO_DATA_SECTION(align) /* -- cgit v1.2.3-59-g8ed1b From 93240b327929ff03c1878ea8badc5c6bd86f053f Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 29 Oct 2019 14:13:34 -0700 Subject: vmlinux.lds.h: Replace RO_DATA_SECTION with RO_DATA Finish renaming RO_DATA_SECTION to RO_DATA. (Calling this a "section" is a lie, since it's multiple sections and section flags cannot be applied to the macro.) Signed-off-by: Kees Cook Signed-off-by: Borislav Petkov Acked-by: Heiko Carstens # s390 Acked-by: Geert Uytterhoeven # m68k Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Dave Hansen Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman Cc: Michal Simek Cc: Rick Edgecombe Cc: Segher Boessenkool Cc: Will Deacon Cc: x86-ml Cc: Yoshinori Sato Link: https://lkml.kernel.org/r/20191029211351.13243-13-keescook@chromium.org --- arch/arc/kernel/vmlinux.lds.S | 2 +- arch/c6x/kernel/vmlinux.lds.S | 2 +- arch/csky/kernel/vmlinux.lds.S | 2 +- arch/h8300/kernel/vmlinux.lds.S | 2 +- arch/hexagon/kernel/vmlinux.lds.S | 2 +- arch/m68k/kernel/vmlinux-nommu.lds | 2 +- arch/nds32/kernel/vmlinux.lds.S | 2 +- arch/nios2/kernel/vmlinux.lds.S | 2 +- arch/openrisc/kernel/vmlinux.lds.S | 4 ++-- arch/parisc/kernel/vmlinux.lds.S | 4 ++-- arch/riscv/kernel/vmlinux.lds.S | 2 +- arch/s390/kernel/vmlinux.lds.S | 2 +- arch/unicore32/kernel/vmlinux.lds.S | 2 +- include/asm-generic/vmlinux.lds.h | 7 ++----- 14 files changed, 17 insertions(+), 20 deletions(-) (limited to 'include/asm-generic') diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S index 1d6eef4b6976..7d1d27066deb 100644 --- a/arch/arc/kernel/vmlinux.lds.S +++ b/arch/arc/kernel/vmlinux.lds.S @@ -95,7 +95,7 @@ SECTIONS _etext = .; _sdata = .; - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) /* * 1. this is .data essentially diff --git a/arch/c6x/kernel/vmlinux.lds.S b/arch/c6x/kernel/vmlinux.lds.S index d6e3802536b3..a3547f9d415b 100644 --- a/arch/c6x/kernel/vmlinux.lds.S +++ b/arch/c6x/kernel/vmlinux.lds.S @@ -82,7 +82,7 @@ SECTIONS EXCEPTION_TABLE(16) - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) .const : { *(.const .const.* .gnu.linkonce.r.*) diff --git a/arch/csky/kernel/vmlinux.lds.S b/arch/csky/kernel/vmlinux.lds.S index 75dd31412242..8598bd7a7bcd 100644 --- a/arch/csky/kernel/vmlinux.lds.S +++ b/arch/csky/kernel/vmlinux.lds.S @@ -49,7 +49,7 @@ SECTIONS _sdata = .; - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; diff --git a/arch/h8300/kernel/vmlinux.lds.S b/arch/h8300/kernel/vmlinux.lds.S index 88776e785245..d3247d33b115 100644 --- a/arch/h8300/kernel/vmlinux.lds.S +++ b/arch/h8300/kernel/vmlinux.lds.S @@ -38,7 +38,7 @@ SECTIONS _etext = . ; } EXCEPTION_TABLE(16) - RO_DATA_SECTION(4) + RO_DATA(4) ROMEND = .; #if defined(CONFIG_ROMKERNEL) . = RAMTOP; diff --git a/arch/hexagon/kernel/vmlinux.lds.S b/arch/hexagon/kernel/vmlinux.lds.S index 6a6e8fc422ee..0145251fa317 100644 --- a/arch/hexagon/kernel/vmlinux.lds.S +++ b/arch/hexagon/kernel/vmlinux.lds.S @@ -50,7 +50,7 @@ SECTIONS _sdata = .; RW_DATA_SECTION(32,PAGE_SIZE,_THREAD_SIZE) - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) _edata = .; EXCEPTION_TABLE(16) diff --git a/arch/m68k/kernel/vmlinux-nommu.lds b/arch/m68k/kernel/vmlinux-nommu.lds index cf6edda38971..de80f8b8ae78 100644 --- a/arch/m68k/kernel/vmlinux-nommu.lds +++ b/arch/m68k/kernel/vmlinux-nommu.lds @@ -60,7 +60,7 @@ SECTIONS { #endif _sdata = .; - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE) _edata = .; diff --git a/arch/nds32/kernel/vmlinux.lds.S b/arch/nds32/kernel/vmlinux.lds.S index c4f1c5a604c3..10ff570ba95b 100644 --- a/arch/nds32/kernel/vmlinux.lds.S +++ b/arch/nds32/kernel/vmlinux.lds.S @@ -53,7 +53,7 @@ SECTIONS _etext = .; /* End of text and rodata section */ _sdata = .; - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; diff --git a/arch/nios2/kernel/vmlinux.lds.S b/arch/nios2/kernel/vmlinux.lds.S index 20e4078b3477..318804a2c7a1 100644 --- a/arch/nios2/kernel/vmlinux.lds.S +++ b/arch/nios2/kernel/vmlinux.lds.S @@ -49,7 +49,7 @@ SECTIONS __init_end = .; _sdata = .; - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; diff --git a/arch/openrisc/kernel/vmlinux.lds.S b/arch/openrisc/kernel/vmlinux.lds.S index 142c51c994f5..f73e0d3ea09f 100644 --- a/arch/openrisc/kernel/vmlinux.lds.S +++ b/arch/openrisc/kernel/vmlinux.lds.S @@ -67,8 +67,8 @@ SECTIONS _sdata = .; - /* Page alignment required for RO_DATA_SECTION */ - RO_DATA_SECTION(PAGE_SIZE) + /* Page alignment required for RO_DATA */ + RO_DATA(PAGE_SIZE) _e_kernel_ro = .; /* Whatever comes after _e_kernel_ro had better be page-aligend, too */ diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S index 168d12b2ebb8..e1c563c7dca1 100644 --- a/arch/parisc/kernel/vmlinux.lds.S +++ b/arch/parisc/kernel/vmlinux.lds.S @@ -109,7 +109,7 @@ SECTIONS _sdata = .; /* Architecturally we need to keep __gp below 0x1000000 and thus - * in front of RO_DATA_SECTION() which stores lots of tracepoint + * in front of RO_DATA() which stores lots of tracepoint * and ftrace symbols. */ #ifdef CONFIG_64BIT . = ALIGN(16); @@ -127,7 +127,7 @@ SECTIONS } #endif - RO_DATA_SECTION(8) + RO_DATA(8) /* RO because of BUILDTIME_EXTABLE_SORT */ EXCEPTION_TABLE(8) diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S index df5229c4034d..66dc17d24dd9 100644 --- a/arch/riscv/kernel/vmlinux.lds.S +++ b/arch/riscv/kernel/vmlinux.lds.S @@ -52,7 +52,7 @@ SECTIONS /* Start of data section */ _sdata = .; - RO_DATA_SECTION(L1_CACHE_BYTES) + RO_DATA(L1_CACHE_BYTES) .srodata : { *(.srodata*) } diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index beb4df053e20..b33c4823f8b5 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -52,7 +52,7 @@ SECTIONS _etext = .; /* End of text section */ } :text = 0x0700 - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) . = ALIGN(PAGE_SIZE); _sdata = .; /* Start of data section */ diff --git a/arch/unicore32/kernel/vmlinux.lds.S b/arch/unicore32/kernel/vmlinux.lds.S index 78c4c56057b0..367c80313bec 100644 --- a/arch/unicore32/kernel/vmlinux.lds.S +++ b/arch/unicore32/kernel/vmlinux.lds.S @@ -43,7 +43,7 @@ SECTIONS _etext = .; _sdata = .; - RO_DATA_SECTION(PAGE_SIZE) + RO_DATA(PAGE_SIZE) RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index a0a989fbe411..061e57c609f6 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -23,7 +23,7 @@ * _etext = .; * * _sdata = .; - * RO_DATA_SECTION(PAGE_SIZE) + * RO_DATA(PAGE_SIZE) * RW_DATA_SECTION(...) * _edata = .; * @@ -363,7 +363,7 @@ /* * Read only Data */ -#define RO_DATA_SECTION(align) \ +#define RO_DATA(align) \ . = ALIGN((align)); \ .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ __start_rodata = .; \ @@ -518,9 +518,6 @@ . = ALIGN((align)); \ __end_rodata = .; -/* All archs are supposed to use RO_DATA() */ -#define RO_DATA(align) RO_DATA_SECTION(align) - /* * .text section. Map to function alignment to avoid address changes * during second ld run in second ld pass when generating System.map -- cgit v1.2.3-59-g8ed1b From c9174047b48d700a785b633319dd7d27288b86be Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 29 Oct 2019 14:13:35 -0700 Subject: vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA Rename RW_DATA_SECTION to RW_DATA. (Calling this a "section" is a lie, since it's multiple sections and section flags cannot be applied to the macro.) Signed-off-by: Kees Cook Signed-off-by: Borislav Petkov Acked-by: Heiko Carstens # s390 Acked-by: Geert Uytterhoeven # m68k Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Dave Hansen Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Michael Ellerman Cc: Michal Simek Cc: Rick Edgecombe Cc: Segher Boessenkool Cc: Will Deacon Cc: x86-ml Cc: Yoshinori Sato Link: https://lkml.kernel.org/r/20191029211351.13243-14-keescook@chromium.org --- arch/alpha/kernel/vmlinux.lds.S | 2 +- arch/arc/kernel/vmlinux.lds.S | 2 +- arch/arm/kernel/vmlinux-xip.lds.S | 2 +- arch/arm/kernel/vmlinux.lds.S | 2 +- arch/arm64/kernel/vmlinux.lds.S | 2 +- arch/csky/kernel/vmlinux.lds.S | 2 +- arch/h8300/kernel/vmlinux.lds.S | 2 +- arch/hexagon/kernel/vmlinux.lds.S | 2 +- arch/m68k/kernel/vmlinux-nommu.lds | 2 +- arch/m68k/kernel/vmlinux-std.lds | 2 +- arch/m68k/kernel/vmlinux-sun3.lds | 2 +- arch/microblaze/kernel/vmlinux.lds.S | 2 +- arch/nds32/kernel/vmlinux.lds.S | 2 +- arch/nios2/kernel/vmlinux.lds.S | 2 +- arch/openrisc/kernel/vmlinux.lds.S | 2 +- arch/parisc/kernel/vmlinux.lds.S | 2 +- arch/riscv/kernel/vmlinux.lds.S | 2 +- arch/s390/kernel/vmlinux.lds.S | 2 +- arch/sh/kernel/vmlinux.lds.S | 2 +- arch/sparc/kernel/vmlinux.lds.S | 2 +- arch/unicore32/kernel/vmlinux.lds.S | 2 +- arch/xtensa/kernel/vmlinux.lds.S | 2 +- include/asm-generic/vmlinux.lds.h | 4 ++-- 23 files changed, 24 insertions(+), 24 deletions(-) (limited to 'include/asm-generic') diff --git a/arch/alpha/kernel/vmlinux.lds.S b/arch/alpha/kernel/vmlinux.lds.S index af411817dd7d..edc45f45523b 100644 --- a/arch/alpha/kernel/vmlinux.lds.S +++ b/arch/alpha/kernel/vmlinux.lds.S @@ -50,7 +50,7 @@ SECTIONS _sdata = .; /* Start of rw data section */ _data = .; - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) .got : { *(.got) diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S index 7d1d27066deb..54139a6f469b 100644 --- a/arch/arc/kernel/vmlinux.lds.S +++ b/arch/arc/kernel/vmlinux.lds.S @@ -101,7 +101,7 @@ SECTIONS * 1. this is .data essentially * 2. THREAD_SIZE for init.task, must be kernel-stk sz aligned */ - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; diff --git a/arch/arm/kernel/vmlinux-xip.lds.S b/arch/arm/kernel/vmlinux-xip.lds.S index d2a9651c24ad..21b8b271c80d 100644 --- a/arch/arm/kernel/vmlinux-xip.lds.S +++ b/arch/arm/kernel/vmlinux-xip.lds.S @@ -112,7 +112,7 @@ SECTIONS . = ALIGN(THREAD_SIZE); _sdata = .; - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) .data.ro_after_init : AT(ADDR(.data.ro_after_init) - LOAD_OFFSET) { *(.data..ro_after_init) } diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index 068db6860867..319ccb10846a 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -141,7 +141,7 @@ SECTIONS __init_end = .; _sdata = .; - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; BSS_SECTION(0, 0, 0) diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index e7dafc29b1fa..a4b3e6c0680c 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -214,7 +214,7 @@ SECTIONS _data = .; _sdata = .; - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN) /* * Data written with the MMU off but read with the MMU on requires diff --git a/arch/csky/kernel/vmlinux.lds.S b/arch/csky/kernel/vmlinux.lds.S index 8598bd7a7bcd..2ff37beaf2bf 100644 --- a/arch/csky/kernel/vmlinux.lds.S +++ b/arch/csky/kernel/vmlinux.lds.S @@ -50,7 +50,7 @@ SECTIONS _sdata = .; RO_DATA(PAGE_SIZE) - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; EXCEPTION_TABLE(L1_CACHE_BYTES) diff --git a/arch/h8300/kernel/vmlinux.lds.S b/arch/h8300/kernel/vmlinux.lds.S index d3247d33b115..2ac7bdcd2fe0 100644 --- a/arch/h8300/kernel/vmlinux.lds.S +++ b/arch/h8300/kernel/vmlinux.lds.S @@ -47,7 +47,7 @@ SECTIONS #endif _sdata = . ; __data_start = . ; - RW_DATA_SECTION(0, PAGE_SIZE, THREAD_SIZE) + RW_DATA(0, PAGE_SIZE, THREAD_SIZE) #if defined(CONFIG_ROMKERNEL) #undef ADDR #endif diff --git a/arch/hexagon/kernel/vmlinux.lds.S b/arch/hexagon/kernel/vmlinux.lds.S index 0145251fa317..0ca2471ddb9f 100644 --- a/arch/hexagon/kernel/vmlinux.lds.S +++ b/arch/hexagon/kernel/vmlinux.lds.S @@ -49,7 +49,7 @@ SECTIONS INIT_DATA_SECTION(PAGE_SIZE) _sdata = .; - RW_DATA_SECTION(32,PAGE_SIZE,_THREAD_SIZE) + RW_DATA(32,PAGE_SIZE,_THREAD_SIZE) RO_DATA(PAGE_SIZE) _edata = .; diff --git a/arch/m68k/kernel/vmlinux-nommu.lds b/arch/m68k/kernel/vmlinux-nommu.lds index de80f8b8ae78..7b975420c3d9 100644 --- a/arch/m68k/kernel/vmlinux-nommu.lds +++ b/arch/m68k/kernel/vmlinux-nommu.lds @@ -61,7 +61,7 @@ SECTIONS { _sdata = .; RO_DATA(PAGE_SIZE) - RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE) + RW_DATA(16, PAGE_SIZE, THREAD_SIZE) _edata = .; EXCEPTION_TABLE(16) diff --git a/arch/m68k/kernel/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds index 625a5785804f..6e7eb49ed985 100644 --- a/arch/m68k/kernel/vmlinux-std.lds +++ b/arch/m68k/kernel/vmlinux-std.lds @@ -33,7 +33,7 @@ SECTIONS RODATA - RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE) + RW_DATA(16, PAGE_SIZE, THREAD_SIZE) BSS_SECTION(0, 0, 0) diff --git a/arch/m68k/kernel/vmlinux-sun3.lds b/arch/m68k/kernel/vmlinux-sun3.lds index 9868270b0984..1a0ad6b6dd8c 100644 --- a/arch/m68k/kernel/vmlinux-sun3.lds +++ b/arch/m68k/kernel/vmlinux-sun3.lds @@ -30,7 +30,7 @@ SECTIONS EXCEPTION_TABLE(16) :data _sdata = .; /* Start of rw data section */ - RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE) :data + RW_DATA(16, PAGE_SIZE, THREAD_SIZE) :data /* End of data goes *here* so that freeing init code works properly. */ _edata = .; NOTES diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S index 2299694748ea..b8efb08204a1 100644 --- a/arch/microblaze/kernel/vmlinux.lds.S +++ b/arch/microblaze/kernel/vmlinux.lds.S @@ -69,7 +69,7 @@ SECTIONS { } _sdata = . ; - RW_DATA_SECTION(32, PAGE_SIZE, THREAD_SIZE) + RW_DATA(32, PAGE_SIZE, THREAD_SIZE) _edata = . ; /* Under the microblaze ABI, .sdata and .sbss must be contiguous */ diff --git a/arch/nds32/kernel/vmlinux.lds.S b/arch/nds32/kernel/vmlinux.lds.S index 10ff570ba95b..f679d3397436 100644 --- a/arch/nds32/kernel/vmlinux.lds.S +++ b/arch/nds32/kernel/vmlinux.lds.S @@ -54,7 +54,7 @@ SECTIONS _sdata = .; RO_DATA(PAGE_SIZE) - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; EXCEPTION_TABLE(16) diff --git a/arch/nios2/kernel/vmlinux.lds.S b/arch/nios2/kernel/vmlinux.lds.S index 318804a2c7a1..c55a7cfa1075 100644 --- a/arch/nios2/kernel/vmlinux.lds.S +++ b/arch/nios2/kernel/vmlinux.lds.S @@ -50,7 +50,7 @@ SECTIONS _sdata = .; RO_DATA(PAGE_SIZE) - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; BSS_SECTION(0, 0, 0) diff --git a/arch/openrisc/kernel/vmlinux.lds.S b/arch/openrisc/kernel/vmlinux.lds.S index f73e0d3ea09f..60449fd7f16f 100644 --- a/arch/openrisc/kernel/vmlinux.lds.S +++ b/arch/openrisc/kernel/vmlinux.lds.S @@ -74,7 +74,7 @@ SECTIONS /* Whatever comes after _e_kernel_ro had better be page-aligend, too */ /* 32 here is cacheline size... recheck this */ - RW_DATA_SECTION(32, PAGE_SIZE, PAGE_SIZE) + RW_DATA(32, PAGE_SIZE, PAGE_SIZE) _edata = .; diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S index e1c563c7dca1..12b3d7d5e9e4 100644 --- a/arch/parisc/kernel/vmlinux.lds.S +++ b/arch/parisc/kernel/vmlinux.lds.S @@ -148,7 +148,7 @@ SECTIONS data_start = .; /* Data */ - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, PAGE_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, PAGE_SIZE) /* PA-RISC locks requires 16-byte alignment */ . = ALIGN(16); diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S index 66dc17d24dd9..12f42f96d46e 100644 --- a/arch/riscv/kernel/vmlinux.lds.S +++ b/arch/riscv/kernel/vmlinux.lds.S @@ -57,7 +57,7 @@ SECTIONS *(.srodata*) } - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) .sdata : { __global_pointer$ = . + 0x800; *(.sdata*) diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index b33c4823f8b5..37695499717d 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -67,7 +67,7 @@ SECTIONS . = ALIGN(PAGE_SIZE); __end_ro_after_init = .; - RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE) + RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE) BOOT_DATA_PRESERVED _edata = .; /* End of data section */ diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S index fef39054cc70..c60b19958c35 100644 --- a/arch/sh/kernel/vmlinux.lds.S +++ b/arch/sh/kernel/vmlinux.lds.S @@ -51,7 +51,7 @@ SECTIONS _sdata = .; RO_DATA(PAGE_SIZE) - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; DWARF_EH_FRAME diff --git a/arch/sparc/kernel/vmlinux.lds.S b/arch/sparc/kernel/vmlinux.lds.S index 8929fbc35a80..7ec79918b566 100644 --- a/arch/sparc/kernel/vmlinux.lds.S +++ b/arch/sparc/kernel/vmlinux.lds.S @@ -67,7 +67,7 @@ SECTIONS .data1 : { *(.data1) } - RW_DATA_SECTION(SMP_CACHE_BYTES, 0, THREAD_SIZE) + RW_DATA(SMP_CACHE_BYTES, 0, THREAD_SIZE) /* End of data section */ _edata = .; diff --git a/arch/unicore32/kernel/vmlinux.lds.S b/arch/unicore32/kernel/vmlinux.lds.S index 367c80313bec..6fb320b337ef 100644 --- a/arch/unicore32/kernel/vmlinux.lds.S +++ b/arch/unicore32/kernel/vmlinux.lds.S @@ -44,7 +44,7 @@ SECTIONS _sdata = .; RO_DATA(PAGE_SIZE) - RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) _edata = .; EXCEPTION_TABLE(L1_CACHE_BYTES) diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S index b97e5798b9cf..bdbd7c4056c1 100644 --- a/arch/xtensa/kernel/vmlinux.lds.S +++ b/arch/xtensa/kernel/vmlinux.lds.S @@ -134,7 +134,7 @@ SECTIONS /* Data section */ _sdata = .; - RW_DATA_SECTION(XCHAL_ICACHE_LINESIZE, PAGE_SIZE, THREAD_SIZE) + RW_DATA(XCHAL_ICACHE_LINESIZE, PAGE_SIZE, THREAD_SIZE) _edata = .; /* Initialization code and data: */ diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 061e57c609f6..356078e50a5c 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -24,7 +24,7 @@ * * _sdata = .; * RO_DATA(PAGE_SIZE) - * RW_DATA_SECTION(...) + * RW_DATA(...) * _edata = .; * * EXCEPTION_TABLE(...) @@ -975,7 +975,7 @@ * matches the requirement of PAGE_ALIGNED_DATA. * * use 0 as page_align if page_aligned data is not used */ -#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ +#define RW_DATA(cacheline, pagealigned, inittask) \ . = ALIGN(PAGE_SIZE); \ .data : AT(ADDR(.data) - LOAD_OFFSET) { \ INIT_TASK_DATA(inittask) \ -- cgit v1.2.3-59-g8ed1b From b8c2f776164c8f74ac31c5e370ca3f029be0aa19 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 29 Oct 2019 14:13:36 -0700 Subject: vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA Many architectures have an EXCEPTION_TABLE that needs to be only readable. As such, it should live in RO_DATA. Create a macro to identify this case for the architectures that can move EXCEPTION_TABLE into RO_DATA. Signed-off-by: Kees Cook Signed-off-by: Borislav Petkov Acked-by: Will Deacon Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Dave Hansen Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-ia64@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: Michael Ellerman Cc: Michal Simek Cc: Rick Edgecombe Cc: Segher Boessenkool Cc: x86-ml Cc: Yoshinori Sato Link: https://lkml.kernel.org/r/20191029211351.13243-15-keescook@chromium.org --- include/asm-generic/vmlinux.lds.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 356078e50a5c..9867d8e41eed 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -69,6 +69,17 @@ #define NOTES_HEADERS_RESTORE #endif +/* + * Some architectures have non-executable read-only exception tables. + * They can be added to the RO_DATA segment by specifying their desired + * alignment. + */ +#ifdef RO_EXCEPTION_TABLE_ALIGN +#define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN) +#else +#define RO_EXCEPTION_TABLE +#endif + /* Align . to a 8 byte boundary equals to maximum function alignment. */ #define ALIGN_FUNCTION() . = ALIGN(8) @@ -513,6 +524,7 @@ __stop___modver = .; \ } \ \ + RO_EXCEPTION_TABLE \ NOTES \ \ . = ALIGN((align)); \ -- cgit v1.2.3-59-g8ed1b