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2012/1/23 Bendersky, Eli <eli.bendersky at intel.com>: > Hi, > > I would like to examine the implications you mention in more detail. > Thank you! > (1) Symbol address > According to the ELF standard, in a symbol table entry st_value means: "In relocatable files, st_value holds a section offset for a defined symbol. That is, > st_value is an offset from the

...sage and you aren't supposed to be booting a + # bzImage directly from a floppy anyway. + + # e_ident + .byte ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3 + .byte ELFCLASS32, ELFDATA2LSB, EV_CURRENT, ELFOSABI_STANDALONE + .byte 0xeb, 0x3d, 0, 0, 0, 0, 0, 0 +#ifndef CONFIG_RELOCATABLE + .word ET_EXEC # e_type +#else + .word ET_DYN # e_type +#endif + .word EM_386 # e_machine + .int 1 # e_version + .int LOAD_PHYSICAL_ADDR # e_entry + .int phdr - bootsect_start # e_phoff + .int 0 # e_shoff + .int 0 # e_flags + .word e_ehdr - ehdr # e_ehsize + .word e_phdr1 - phdr # e_phentsize...

...sage and you aren't supposed to be booting a + # bzImage directly from a floppy anyway. + + # e_ident + .byte ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3 + .byte ELFCLASS32, ELFDATA2LSB, EV_CURRENT, ELFOSABI_STANDALONE + .byte 0xeb, 0x3d, 0, 0, 0, 0, 0, 0 +#ifndef CONFIG_RELOCATABLE + .word ET_EXEC # e_type +#else + .word ET_DYN # e_type +#endif + .word EM_386 # e_machine + .int 1 # e_version + .int LOAD_PHYSICAL_ADDR # e_entry + .int phdr - bootsect_start # e_phoff + .int 0 # e_shoff + .int 0 # e_flags + .word e_ehdr - ehdr # e_ehsize + .word e_phdr1 - phdr # e_phentsize...

This patch allows core-dumping to work on a cross-bit host/guest configuration, whereas previously that was not supported. It supports both PV and FV guests. The core file format generated by the host, needs to match that of the guest, so an alignment issue is addressed, along with the p2m frame list handling being done according to the guest size. Signed-off-by: Bruce Rogers

Andrew did a great job of merging in the PDA->percpu changes and lguest code for 2.6.21-mm1, but the load_gdt is now unnecessary. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/lguest.c | 4 ---- 1 file changed, 4 deletions(-) =================================================================== --- a/drivers/lguest/lguest.c +++ b/drivers/lguest/lguest.c @@

Andrew did a great job of merging in the PDA->percpu changes and lguest code for 2.6.21-mm1, but the load_gdt is now unnecessary. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/lguest.c | 4 ---- 1 file changed, 4 deletions(-) =================================================================== --- a/drivers/lguest/lguest.c +++ b/drivers/lguest/lguest.c @@

...llow(ace)) > > + allowed |= ace->e_mask; > > + else if (richace_is_deny(ace)) > > + allowed &= ~ace->e_mask; > > + } > > + } > > + return allowed; > > +} > > <snip> > > > +struct richace { > > + unsigned short e_type; > > + unsigned short e_flags; > > + unsigned int e_mask; > > + union { > > + unsigned int e_id; > > + const char *e_who; > > + } u; > > +}; > > <snip> > > > +/* Special e_who identifiers: we use these pointer values in comparisons...

...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_ident, ELFMAG, 4) !=3D 0 || + !elf_check_arch(hdr) || + hdr->e_type !=3D ET_DYN) + panic("Bogus ELF in vsyscall DSO\n"); + + hdr->e_entry +=3D VDSO_HIGH_BASE; + sechdrs =3D (void *)hdr + hdr->e_shoff; + secstrings =3D (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + + for (i =3D 1; i < hdr->e_shnum; i++) { + if (!(sechdrs[i].sh_flags &...

...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_ident, ELFMAG, 4) !=3D 0 || + !elf_check_arch(hdr) || + hdr->e_type !=3D ET_DYN) + panic("Bogus ELF in vsyscall DSO\n"); + + hdr->e_entry +=3D VDSO_HIGH_BASE; + sechdrs =3D (void *)hdr + hdr->e_shoff; + secstrings =3D (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + + for (i =3D 1; i < hdr->e_shnum; i++) { + if (!(sechdrs[i].sh_flags &...

...e in the executable # - extract that filename and strip trailing null byte. # use warnings; use strict; sub PATH_MAX () {4096;} sub SZ_ELF32HDR () {52;} sub SZ_ELF64HDR () {64;} # Elf32_Ehdr->e_ident[4]: are variables 32 or 64 bit sub ELFCLASS32 () {1;} sub ELFCLASS64 () {2;} # Elf32_Ehdr->e_type: whether it's an executable, core, object # file or something else entirely. sub ET_EXEC () {2;} sub ET_DYN () {3;} # # ELF Private header # sub SZ_ELF32PHDR {32;} sub SZ_ELF64PHDR {56;} # Elf32_Phdr->p_type. sub PT_INTERP () {3;} # Program interpreter sub readStruct ($$$$$) { my ($fh...

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

Hello Rui, I'm enabling the LLD in the Uefi firmware edk2 build. I meet a problem about the -pie option and cannot output the executable type obj file correctly. I need your advice. The Uefi firmware executable binary is the position independent + small code mode in 64bits. So we always add the options "-Wl,-pie -mcmodel=small" in our clang build toolchain. These options work well

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.

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.

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

...; @@ -186,10 +191,11 @@ struct elf64_sym { Elf64_Addr st_value; /* Value of the symbol */ Elf64_Xword st_size; /* Associated symbol size */ }; - +#endif /* __ASSEMBLY__ */ #define EI_NIDENT 16 +#ifndef __ASSEMBLY__ struct elf32_hdr { unsigned char e_ident[EI_NIDENT]; Elf32_Half e_type; @@ -223,6 +229,7 @@ struct elf64_hdr { Elf64_Half e_shnum; Elf64_Half e_shstrndx; }; +#endif /* __ASSEMBLY__ */ /* These constants define the permissions on sections in the program header, p_flags. */ @@ -230,6 +237,7 @@ struct elf64_hdr { #define PF_W 0x2 #define PF_X 0x1 +#if...

...; @@ -186,10 +191,11 @@ struct elf64_sym { Elf64_Addr st_value; /* Value of the symbol */ Elf64_Xword st_size; /* Associated symbol size */ }; - +#endif /* __ASSEMBLY__ */ #define EI_NIDENT 16 +#ifndef __ASSEMBLY__ struct elf32_hdr { unsigned char e_ident[EI_NIDENT]; Elf32_Half e_type; @@ -223,6 +229,7 @@ struct elf64_hdr { Elf64_Half e_shnum; Elf64_Half e_shstrndx; }; +#endif /* __ASSEMBLY__ */ /* These constants define the permissions on sections in the program header, p_flags. */ @@ -230,6 +237,7 @@ struct elf64_hdr { #define PF_W 0x2 #define PF_X 0x1 +#if...