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Should Elf_Dyn_Impl in Object/ELF.h also have a 32bit version. getTag/getVal/getPtr all return 64bit types however Elf_Addr etc will not always be 32bit?

...S __bss_dwords = (__bss_len + 3) >> 2; . = ALIGN(128); - + /* Very large objects which don't need to be zeroed */ .hugebss : { diff --git a/efi/wrapper.c b/efi/wrapper.c index 4839e52..1988124 100644 --- a/efi/wrapper.c +++ b/efi/wrapper.c @@ -35,7 +35,7 @@ typedef Elf64_Addr Elf_Addr; #endif /* - * 'so_size' is the file size of the ELF shared object. + * 'so_memsz' is the size of the ELF shared object once loaded. * 'data_size' is the size of initialised data in the shared object. * 'class' dictates how the header is written * For 32b...

...S __bss_dwords = (__bss_len + 3) >> 2; . = ALIGN(128); - + /* Very large objects which don't need to be zeroed */ .hugebss : { diff --git a/efi/wrapper.c b/efi/wrapper.c index 9652368..a5247ae 100644 --- a/efi/wrapper.c +++ b/efi/wrapper.c @@ -35,7 +35,7 @@ typedef Elf64_Addr Elf_Addr; #endif /* - * 'so_size' is the file size of the ELF shared object. + * 'so_memsz' is the size of the ELF shared object once loaded. * 'data_size' is the size of initialised data in the shared object. * 'class' dictates how the header is written * For 32b...

The PE headers of the generated efi file were quite buggy. And since OVMF perform a few consistency checks, syslinux was unable to run on it. I don't pretend to have a thorough understanding of the PE+ headers, some bugs may remain. :) Celelibi (4): efi: Fix PE header field rva_and_sizes_nr efi: Location, size and alignment of .text section efi: Useless relocations in PE file efi: PE

Changes: - patch v2: - Adapt patch to work post KPTI and compiler changes - Redo all performance testing with latest configs and compilers - Simplify mov macro on PIE (MOVABS now) - Reduce GOT footprint - patch v1: - Simplify ftrace implementation. - Use gcc mstack-protector-guard-reg=%gs with PIE when possible. - rfc v3: - Use --emit-relocs instead of -pie to reduce

Changes: - patch v2: - Adapt patch to work post KPTI and compiler changes - Redo all performance testing with latest configs and compilers - Simplify mov macro on PIE (MOVABS now) - Reduce GOT footprint - patch v1: - Simplify ftrace implementation. - Use gcc mstack-protector-guard-reg=%gs with PIE when possible. - rfc v3: - Use --emit-relocs instead of -pie to reduce

These patches make the changes necessary to build the kernel as Position Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below the top 2G of the virtual address space. It allows to optionally extend the KASLR randomization range from 1G to 3G. Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler changes, PIE support and KASLR in general. Thanks to

These patches make the changes necessary to build the kernel as Position Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below the top 2G of the virtual address space. It allows to optionally extend the KASLR randomization range from 1G to 3G. Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler changes, PIE support and KASLR in general. Thanks to

Changes: - patch v3: - Update on message to describe longer term PIE goal. - Minor change on ftrace if condition. - Changed code using xchgq. - patch v2: - Adapt patch to work post KPTI and compiler changes - Redo all performance testing with latest configs and compilers - Simplify mov macro on PIE (MOVABS now) - Reduce GOT footprint - patch v1: - Simplify ftrace

Changes: - patch v1: - Simplify ftrace implementation. - Use gcc mstack-protector-guard-reg=%gs with PIE when possible. - rfc v3: - Use --emit-relocs instead of -pie to reduce dynamic relocation space on mapped memory. It also simplifies the relocation process. - Move the start the module section next to the kernel. Remove the need for -mcmodel=large on modules. Extends

Changes: - patch v1: - Simplify ftrace implementation. - Use gcc mstack-protector-guard-reg=%gs with PIE when possible. - rfc v3: - Use --emit-relocs instead of -pie to reduce dynamic relocation space on mapped memory. It also simplifies the relocation process. - Move the start the module section next to the kernel. Remove the need for -mcmodel=large on modules. Extends