search for: sechdrs

This adds [f]getc() and fgets() for parsing config files. Probably hard to avoid. Still trying to decide if I actually want to add system() or not. -hpa

...43.000000000 = -0800 @@ -72,6 +72,99 @@ extern const char vsyscall_int80_start, = extern const char vsyscall_sysenter_start, vsyscall_sysenter_end; static struct page *syscall_pages[1]; = +#ifdef CONFIG_COMPAT_VDSO +static void fixup_vsyscall_elf(char *page) +{ + Elf32_Ehdr *hdr; + Elf32_Shdr *sechdrs; + Elf32_Phdr *phdr; + char *secstrings; + int i, j, n; + + hdr =3D (Elf32_Ehdr *)page; + = + printk("Remapping vsyscall page to %08x\n", (unsigned int)VDSO_HIGH_BASE); + + /* Sanity checks against insmoding binaries or wrong arch, + weird elf version */ + if (memcmp(hdr->e_...

...43.000000000 = -0800 @@ -72,6 +72,99 @@ extern const char vsyscall_int80_start, = extern const char vsyscall_sysenter_start, vsyscall_sysenter_end; static struct page *syscall_pages[1]; = +#ifdef CONFIG_COMPAT_VDSO +static void fixup_vsyscall_elf(char *page) +{ + Elf32_Ehdr *hdr; + Elf32_Shdr *sechdrs; + Elf32_Phdr *phdr; + char *secstrings; + int i, j, n; + + hdr =3D (Elf32_Ehdr *)page; + = + printk("Remapping vsyscall page to %08x\n", (unsigned int)VDSO_HIGH_BASE); + + /* Sanity checks against insmoding binaries or wrong arch, + weird elf version */ + if (memcmp(hdr->e_...

...p; + !find_got_kernel_entry(s, rela + i)) + ret++; + break; + } + } + return ret; +} + +/* + * Generate GOT entries for GOTPCREL relocations that do not exists in the + * kernel GOT. Based on arm64 module-plts implementation. + */ +int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, + char *secstrings, struct module *mod) +{ + unsigned long gots = 0; + Elf_Shdr *symtab = NULL; + Elf64_Sym *syms = NULL; + char *strings, *name; + int i; + + /* + * Find the empty .got section so we can expand it to store the PLT + * entries. Record the symtab address as well. + */ + f...

...vsyscall_int80_start, vsyscall_int80_end; extern const char vsyscall_sysenter_start, vsyscall_sysenter_end; = +#ifdef CONFIG_RELOCATABLE_FIXMAP +extern const char SYSENTER_RETURN; +const char *SYSENTER_RETURN_ADDR; + +static void fixup_vsyscall_elf(char *page) +{ + Elf32_Ehdr *hdr; + Elf32_Shdr *sechdrs; + Elf32_Phdr *phdr; + char *secstrings; + int i, j, n; + + hdr =3D (Elf32_Ehdr *)page; + + /* Sanity checks against insmoding binaries or wrong arch, + weird elf version */ + if (memcmp(hdr->e_ident, ELFMAG, 4) !=3D 0 || + !elf_check_arch(hdr) || + hdr->e_type !=3D ET_DYN) + pan...

...vsyscall_int80_start, vsyscall_int80_end; extern const char vsyscall_sysenter_start, vsyscall_sysenter_end; = +#ifdef CONFIG_RELOCATABLE_FIXMAP +extern const char SYSENTER_RETURN; +const char *SYSENTER_RETURN_ADDR; + +static void fixup_vsyscall_elf(char *page) +{ + Elf32_Ehdr *hdr; + Elf32_Shdr *sechdrs; + Elf32_Phdr *phdr; + char *secstrings; + int i, j, n; + + hdr =3D (Elf32_Ehdr *)page; + + /* Sanity checks against insmoding binaries or wrong arch, + weird elf version */ + if (memcmp(hdr->e_ident, ELFMAG, 4) !=3D 0 || + !elf_check_arch(hdr) || + hdr->e_type !=3D ET_DYN) + pan...

...t_platform) x86_hyper->init_platform(); } diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c index 62e7d70aadd5..34ec137e302a 100644 --- a/arch/x86/kernel/module.c +++ b/arch/x86/kernel/module.c @@ -213,8 +213,8 @@ int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { - const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL, - *para = NULL, *orc = NULL, *orc_ip = NULL; + const Elf_Shdr *s, *text = NULL, *alt = NULL, *pv_alt = NULL, + *locks = NULL, *para = NULL, *orc = NULL, *orc_ip = NULL; char *secstrings = (void *)hdr +...

...rnel/module.c --- working-2.6.17-rc4-function-call-abstraction/arch/i386/kernel/module.c 2006-05-16 10:50:48.000000000 +1000 +++ working-2.6.17-rc4-bench/arch/i386/kernel/module.c 2006-05-22 15:21:55.000000000 +1000 @@ -108,7 +108,8 @@ int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { - const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL; + const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL, + *para = NULL; char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; for (s = sechdrs; s < sechdrs + hdr->e_shn...

...rnel/module.c --- working-2.6.17-rc4-function-call-abstraction/arch/i386/kernel/module.c 2006-05-16 10:50:48.000000000 +1000 +++ working-2.6.17-rc4-bench/arch/i386/kernel/module.c 2006-05-22 15:21:55.000000000 +1000 @@ -108,7 +108,8 @@ int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { - const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL; + const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL, + *para = NULL; char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; for (s = sechdrs; s < sechdrs + hdr->e_shn...

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

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

OK, this is the revised paravirt.h (Andi has seen this before), then the second is the binary patching stuff. More things get added to the paravirt struct in future patches, but this basic stuff hasn't changed for some time. ==== This patch does the dumbest possible replacement of paravirtualized instructions: calls through a "paravirt_ops" structure. Currently these are function

This changes the pv ops code generation to more closely match reality. For example, instead of: callq *0xffffffff81e3a400 (pv_irq_ops.save_fl) vmlinux will now show: pushfq pop %rax nop nop nop nop nop which is what the runtime version of the code will show in most cases. This idea was suggested by Andy Lutomirski. The benefits are: - For the most common runtime cases