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[ This patch depends on the cross-architecture ELF cleanup patch. ] This series updates the boot protocol to 2.07 and uses it to implement paravirtual booting. This allows the bootloader to tell the kernel what kind of hardware/pseudo-hardware environment it's coming up under, and the kernel can use the appropriate boot sequence code. Specifically: - Update the boot protocol to 2.07, which

[ This patch depends on the cross-architecture ELF cleanup patch. ] This series updates the boot protocol to 2.07 and uses it to implement paravirtual booting. This allows the bootloader to tell the kernel what kind of hardware/pseudo-hardware environment it's coming up under, and the kernel can use the appropriate boot sequence code. Specifically: - Update the boot protocol to 2.07, which

This series updates the boot protocol to 2.07 and uses it to implement paravirtual booting. This allows the bootloader to tell the kernel what kind of hardware/pseudo-hardware environment it's coming up under, and the kernel can use the appropriate boot sequence code. Specifically: - Update the boot protocol to 2.07, which adds fields to specify the hardware subarchitecture and some

This series updates the boot protocol to 2.07 and uses it to implement paravirtual booting. This allows the bootloader to tell the kernel what kind of hardware/pseudo-hardware environment it's coming up under, and the kernel can use the appropriate boot sequence code. Specifically: - Update the boot protocol to 2.07, which adds fields to specify the hardware subarchitecture and some

This series updates the boot protocol to 2.07 and uses it to implement paravirtual booting. This allows the bootloader to tell the kernel what kind of hardware/pseudo-hardware environment it's coming up under, and the kernel can use the appropriate boot sequence code. Specifically: - Update the boot protocol to 2.07, which adds fields to specify the hardware subarchitecture and some

This series: 1. Updates the boot protocol to version 2.07 2. Clean up the existing build process, to get rid of tools/build and make the linker do more heavy lifting 3. Make the bzImage payload an ELF file. The bootloader can extract this as a naked ELF file by skipping over boot_params.setup_sects worth of 16-bit setup code. 4. Update the boot_params to 2.07, and update the

This series: 1. Updates the boot protocol to version 2.07 2. Clean up the existing build process, to get rid of tools/build and make the linker do more heavy lifting 3. Make the bzImage payload an ELF file. The bootloader can extract this as a naked ELF file by skipping over boot_params.setup_sects worth of 16-bit setup code. 4. Update the boot_params to 2.07, and update the

...======= --- a/arch/i386/boot/compressed/Makefile +++ b/arch/i386/boot/compressed/Makefile @@ -4,7 +4,8 @@ # create a compressed vmlinux image from the original vmlinux # -targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o \ +targets := vmlinux vmlinux.bin vmlinux.bin.gz \ + elfhdr.o head.o misc.o notes.o piggy.o \ vmlinux.bin.all vmlinux.relocs EXTRA_AFLAGS := -traditional @@ -17,7 +18,9 @@ CFLAGS := -m32 -D__KERNEL__ $(LINUX_INC $(call cc-option,-fno-stack-protector) LDFLAGS := -m elf_i386 -$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/misc.o $(obj...

...======= --- a/arch/i386/boot/compressed/Makefile +++ b/arch/i386/boot/compressed/Makefile @@ -4,7 +4,8 @@ # create a compressed vmlinux image from the original vmlinux # -targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o \ +targets := vmlinux vmlinux.bin vmlinux.bin.gz \ + elfhdr.o head.o misc.o notes.o piggy.o \ vmlinux.bin.all vmlinux.relocs EXTRA_AFLAGS := -traditional @@ -17,7 +18,9 @@ CFLAGS := -m32 -D__KERNEL__ $(LINUX_INC $(call cc-option,-fno-stack-protector) LDFLAGS := -m elf_i386 -$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/misc.o $(obj...

...0 -#endif +#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) +#define VDSO_PRELINK 0 = #define VDSO_SYM(x) \ - (VDSO_COMPAT_BASE + (unsigned long)(x) - VDSO_PRELINK) + (VDSO_CURRENT_BASE + (unsigned long)(x) - VDSO_PRELINK) = #define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE) -#define VDSO_EHDR ((const struct elfhdr *) VDSO_COMPAT_BASE) +#define VDSO_EHDR ((const struct elfhdr *) VDSO_CURRENT_BASE) = extern void __kernel_vsyscall; = #define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall) = -#ifndef CONFIG_COMPAT_VDSO -#define ARCH_HAS_SETUP_ADD...

...0 -#endif +#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) +#define VDSO_PRELINK 0 = #define VDSO_SYM(x) \ - (VDSO_COMPAT_BASE + (unsigned long)(x) - VDSO_PRELINK) + (VDSO_CURRENT_BASE + (unsigned long)(x) - VDSO_PRELINK) = #define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE) -#define VDSO_EHDR ((const struct elfhdr *) VDSO_COMPAT_BASE) +#define VDSO_EHDR ((const struct elfhdr *) VDSO_CURRENT_BASE) = extern void __kernel_vsyscall; = #define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall) = -#ifndef CONFIG_COMPAT_VDSO -#define ARCH_HAS_SETUP_ADD...

Hi Andi, Here's a couple of patches to fix up COMPAT_VDSO: The first is a straightforward implementation of Jan's original idea of relocating the VDSO to match its mapped location. Unlike Jan and Zach's version, I changed it to relocate based on the phdrs rather than the sections; the result is pleasantly compact. The second patch takes advantage of the fact that all the

Hi Andi, Here's a couple of patches to fix up COMPAT_VDSO: The first is a straightforward implementation of Jan's original idea of relocating the VDSO to match its mapped location. Unlike Jan and Zach's version, I changed it to relocate based on the phdrs rather than the sections; the result is pleasantly compact. The second patch takes advantage of the fact that all the

Hi Andi, Four patches: - clean up asm/bugs.h, by moving all the C code into its own C file - split identify_cpu() into boot and secondary variants, so that boot-time setup functions can be marked __init - repost of the COMPAT_VDSO patches with a bit more robustness from unknown DT_tags, and functions marked __init, since all this is boot-time only setup. Thanks, J --

Hi Andi, Four patches: - clean up asm/bugs.h, by moving all the C code into its own C file - split identify_cpu() into boot and secondary variants, so that boot-time setup functions can be marked __init - repost of the COMPAT_VDSO patches with a bit more robustness from unknown DT_tags, and functions marked __init, since all this is boot-time only setup. Thanks, J --

..., elf_fpregs) dump_task_fpu(tsk, elf_fpregs) #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs) -#define VSYSCALL_BASE (__fix_to_virt(FIX_VSYSCALL)) +#define VSYSCALL_BASE ((unsigned long)current->mm->context.vdso) #define VSYSCALL_EHDR ((const struct elfhdr *) VSYSCALL_BASE) -#define VSYSCALL_ENTRY ((unsigned long) &__kernel_vsyscall) +#define VSYSCALL_OFFSET ((unsigned long) &__kernel_vsyscall) +#define VSYSCALL_ENTRY (VSYSCALL_BASE + VSYSCALL_OFFSET) +/* kernel-internal fixmap address: */ +#define __VSYSCALL_BASE (__fix_to_virt(FIX_VSYSCALL)...

..., elf_fpregs) dump_task_fpu(tsk, elf_fpregs) #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs) -#define VSYSCALL_BASE (__fix_to_virt(FIX_VSYSCALL)) +#define VSYSCALL_BASE ((unsigned long)current->mm->context.vdso) #define VSYSCALL_EHDR ((const struct elfhdr *) VSYSCALL_BASE) -#define VSYSCALL_ENTRY ((unsigned long) &__kernel_vsyscall) +#define VSYSCALL_OFFSET ((unsigned long) &__kernel_vsyscall) +#define VSYSCALL_ENTRY (VSYSCALL_BASE + VSYSCALL_OFFSET) +/* kernel-internal fixmap address: */ +#define __VSYSCALL_BASE (__fix_to_virt(FIX_VSYSCALL)...

..._CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs) #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs) -#define VSYSCALL_BASE (__fix_to_virt(FIX_VSYSCALL)) +#define VSYSCALL_BASE (PAGE_OFFSET - 2*PAGE_SIZE) #define VSYSCALL_EHDR ((const struct elfhdr *) VSYSCALL_BASE) #define VSYSCALL_ENTRY ((unsigned long) &__kernel_vsyscall) extern void __kernel_vsyscall; +#define ARCH_HAS_SETUP_ADDITIONAL_PAGES +struct linux_binprm; +extern int arch_setup_additional_pages(struct linux_binprm *bprm, + int executab...

..._CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs) #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs) -#define VSYSCALL_BASE (__fix_to_virt(FIX_VSYSCALL)) +#define VSYSCALL_BASE (PAGE_OFFSET - 2*PAGE_SIZE) #define VSYSCALL_EHDR ((const struct elfhdr *) VSYSCALL_BASE) #define VSYSCALL_ENTRY ((unsigned long) &__kernel_vsyscall) extern void __kernel_vsyscall; +#define ARCH_HAS_SETUP_ADDITIONAL_PAGES +struct linux_binprm; +extern int arch_setup_additional_pages(struct linux_binprm *bprm, + int executab...

Create a configurable hole in the linear address space at the top of memory. A more advanced interface is needed to negotiate how much space the hypervisor is allowed to steal, but in the end, it seems most likely that a fixed constant size will be chosen for the compiled kernel, potentially propagated to an information page used by paravirtual initialization to determine interface compatibility.