search for: provide_hidden

Provide an option to have a PROVIDE_HIDDEN (linker script) entry for each weak symbol. This option solve an error in x86_64 where the linker optimizes pie generate code to be non-pie because --emit-relocs was used instead of -pie (to reduce dynamic relocations). Signed-off-by: Thomas Garnier <thgarnie at google.com> --- init/Kconfig...

...*(.rel.got) + *(.rel.sdata .rel.sdata.* .rel.gnu.linkonce.s.*) + *(.rel.sbss .rel.sbss.* .rel.gnu.linkonce.sb.*) + *(.rel.sdata2 .rel.sdata2.* .rel.gnu.linkonce.s2.*) + *(.rel.sbss2 .rel.sbss2.* .rel.gnu.linkonce.sb2.*) + *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) + PROVIDE_HIDDEN (__rel_iplt_start = .); + *(.rel.iplt) + PROVIDE_HIDDEN (__rel_iplt_end = .); + } + .rela.dyn : + { + *(.rela.init) + *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) + *(.rela.fini) + *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) + *(.rela.d...

...*(.rel.got) + *(.rel.sdata .rel.sdata.* .rel.gnu.linkonce.s.*) + *(.rel.sbss .rel.sbss.* .rel.gnu.linkonce.sb.*) + *(.rel.sdata2 .rel.sdata2.* .rel.gnu.linkonce.s2.*) + *(.rel.sbss2 .rel.sbss2.* .rel.gnu.linkonce.sb2.*) + *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) + PROVIDE_HIDDEN (__rel_iplt_start = .); + *(.rel.iplt) + PROVIDE_HIDDEN (__rel_iplt_end = .); + } + .rela.dyn : + { + *(.rela.init) + *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) + *(.rela.fini) + *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) + *(.rela.d...

Hey, We would like to propose an idea that would help security harden applications that define custom sections. Motivation and Background In Chromium we have a garbage collector that implements some RTTI machinery in the form of a table. This table is used by the collector to trace and finalize garbage collected objects. We're thinking of using __attribute__((section(...))) so that the table

...;m guessing you don't want to use the existing > .data.rel.ro.* convention to take advantage of linker generated symbols. > The following example (not tested) assumes a naming convention of > .data.rel.ro.RTTI.* in your program. > > .data.rel.ro : { > PROVIDE_HIDDEN (__RTTI_start = .); > *(.data.rel.ro.RTTI.*) ; PROVIDE_HIDDEN (__RTTI_end = .); > *(.data.rel.ro.local* > .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro .data.rel.ro.* > .gnu.linkonce.d.rel.ro.*) } > > This would have your table contiguous in the .data.rel....

...e PIE compliant. - 4: Add a new _ASM_MOVABS macro to fetch a symbol address generically. - 14: Adapt percpu design to work correctly when PIE is enabled. - 15: Provide an option to default visibility to hidden except for key symbols. It removes errors between compilation units. - 16: Add PROVIDE_HIDDEN replacement on the linker script for weak symbols to reduce GOT footprint. - 17: Adapt relocation tool to handle PIE binary correctly. - 20: Add support for global cookie. - 21: Support ftrace with PIE (used on Ubuntu config). - 22: Add option to move the module section just after the ke...

...e PIE compliant. - 4: Add a new _ASM_MOVABS macro to fetch a symbol address generically. - 14: Adapt percpu design to work correctly when PIE is enabled. - 15: Provide an option to default visibility to hidden except for key symbols. It removes errors between compilation units. - 16: Add PROVIDE_HIDDEN replacement on the linker script for weak symbols to reduce GOT footprint. - 17: Adapt relocation tool to handle PIE binary correctly. - 20: Add support for global cookie. - 21: Support ftrace with PIE (used on Ubuntu config). - 22: Add option to move the module section just after the ke...

...e PIE compliant. - 4: Add a new _ASM_MOVABS macro to fetch a symbol address generically. - 14: Adapt percpu design to work correctly when PIE is enabled. - 15: Provide an option to default visibility to hidden except for key symbols. It removes errors between compilation units. - 16: Add PROVIDE_HIDDEN replacement on the linker script for weak symbols to reduce GOT footprint. - 17: Adapt relocation tool to handle PIE binary correctly. - 20: Add support for global cookie. - 21: Support ftrace with PIE (used on Ubuntu config). - 22: Add option to move the module section just after the ke...

...PIE compliant. - 4: Add a new _ASM_GET_PTR macro to fetch a symbol address generically. - 14: Adapt percpu design to work correctly when PIE is enabled. - 15: Provide an option to default visibility to hidden except for key symbols. It removes errors between compilation units. - 16: Add PROVIDE_HIDDEN replacement on the linker script for weak symbols to reduce GOT footprint. - 17: Adapt relocation tool to handle PIE binary correctly. - 20: Add support for global cookie. - 21: Support ftrace with PIE (used on Ubuntu config). - 22: Add option to move the module section just after the ke...

...PIE compliant. - 4: Add a new _ASM_GET_PTR macro to fetch a symbol address generically. - 14: Adapt percpu design to work correctly when PIE is enabled. - 15: Provide an option to default visibility to hidden except for key symbols. It removes errors between compilation units. - 16: Add PROVIDE_HIDDEN replacement on the linker script for weak symbols to reduce GOT footprint. - 17: Adapt relocation tool to handle PIE binary correctly. - 20: Add support for global cookie. - 21: Support ftrace with PIE (used on Ubuntu config). - 22: Add option to move the module section just after the ke...