search for: shn_ab

On 10/15/12 12:01, Nick Kledzik wrote: > > On Oct 15, 2012, at 8:08 AM, Sidney Manning wrote: >> >> I think that absolute atoms will need something similar to, "contentType" added. >> >> SHN_ABS symbols can have different types, STT_OBJECT, STT_FILE and maybe others. In order for the writer to tell it must have a way to reach back and ask the atom what type of symbols caused it to be created. To that end I added a contentType method to AbsoluteAtom and sprinkled changes around to make t...

...gt; > > On 10/15/12 12:01, Nick Kledzik wrote: > >> > >> On Oct 15, 2012, at 8:08 AM, Sidney Manning wrote: > >>> > >>> I think that absolute atoms will need something similar to, > "contentType" added. > >>> > >>> SHN_ABS symbols can have different types, STT_OBJECT, STT_FILE and > maybe others. In order for the writer to tell it must have a way to reach > back and ask the atom what type of symbols caused it to be created. To > that end I added a contentType method to AbsoluteAtom and sprinkled changes &...

...5, 2012, at 4:00 PM, Sid Manning wrote: > On 10/15/12 12:01, Nick Kledzik wrote: >> >> On Oct 15, 2012, at 8:08 AM, Sidney Manning wrote: >>> >>> I think that absolute atoms will need something similar to, "contentType" added. >>> >>> SHN_ABS symbols can have different types, STT_OBJECT, STT_FILE and maybe others. In order for the writer to tell it must have a way to reach back and ask the atom what type of symbols caused it to be created. To that end I added a contentType method to AbsoluteAtom and sprinkled changes around to make t...

...e: > > > On 10/15/12 12:01, Nick Kledzik wrote: > >> > >> On Oct 15, 2012, at 8:08 AM, Sidney Manning wrote: > >>> > >>> I think that absolute atoms will need something similar to, "contentType" added. > >>> > >>> SHN_ABS symbols can have different types, STT_OBJECT, STT_FILE and maybe others. In order for the writer to tell it must have a way to reach back and ask the atom what type of symbols caused it to be created. To that end I added a contentType method to AbsoluteAtom and sprinkled changes around to make t...

I think that absolute atoms will need something similar to, "contentType" added. SHN_ABS symbols can have different types, STT_OBJECT, STT_FILE and maybe others. In order for the writer to tell it must have a way to reach back and ask the atom what type of symbols caused it to be created. To that end I added a contentType method to AbsoluteAtom and sprinkled changes around to ma...

On Oct 15, 2012, at 8:08 AM, Sidney Manning wrote: > > I think that absolute atoms will need something similar to, "contentType" added. > > SHN_ABS symbols can have different types, STT_OBJECT, STT_FILE and maybe others. In order for the writer to tell it must have a way to reach back and ask the atom what type of symbols caused it to be created. To that end I added a contentType method to AbsoluteAtom and sprinkled changes around to make t...

...; + if (strcmp(secstrings+sechdrs[i].sh_name, ".dynsym") =3D=3D 0) { + Elf32_Sym *sym =3D (void *)hdr + sechdrs[i].sh_offset; + n =3D sechdrs[i].sh_size / sizeof(*sym); + for (j =3D 1; j < n; j++) { + int ndx =3D sym[j].st_shndx; + if (ndx =3D=3D SHN_UNDEF || ndx =3D=3D SHN_ABS) + continue; + sym[j].st_value +=3D VDSO_HIGH_BASE; + } + } else if (strcmp(secstrings+sechdrs[i].sh_name, ".dynamic") =3D=3D 0) { + Elf32_Dyn *dyn =3D (void *)hdr + sechdrs[i].sh_offset; + int tag; + while ((tag =3D (++dyn)->d_tag) !=3D DT_NULL) + switch(tag) { +...

...; + if (strcmp(secstrings+sechdrs[i].sh_name, ".dynsym") =3D=3D 0) { + Elf32_Sym *sym =3D (void *)hdr + sechdrs[i].sh_offset; + n =3D sechdrs[i].sh_size / sizeof(*sym); + for (j =3D 1; j < n; j++) { + int ndx =3D sym[j].st_shndx; + if (ndx =3D=3D SHN_UNDEF || ndx =3D=3D SHN_ABS) + continue; + sym[j].st_value +=3D VDSO_HIGH_BASE; + } + } else if (strcmp(secstrings+sechdrs[i].sh_name, ".dynamic") =3D=3D 0) { + Elf32_Dyn *dyn =3D (void *)hdr + sechdrs[i].sh_offset; + int tag; + while ((tag =3D (++dyn)->d_tag) !=3D DT_NULL) + switch(tag) { +...

...strings = (void *) ehdr + sechdrs[symtab->sh_link].sh_offset; + for (i = 0; i < symtab->sh_size/sizeof(Elf_Sym); i++) { + if (syms[i].st_shndx != SHN_UNDEF) + continue; + name = strings + syms[i].st_name; + if (!strcmp(name, "_GLOBAL_OFFSET_TABLE_")) { + syms[i].st_shndx = SHN_ABS; + break; + } + } + return 0; +} +#endif + void *module_alloc(unsigned long size) { void *p; @@ -190,16 +358,20 @@ int apply_relocate_add(Elf64_Shdr *sechdrs, if ((s64)val != *(s32 *)loc) goto overflow; break; +#ifdef CONFIG_X86_PIE + case R_X86_64_GOTPCREL: + val = module_e...

...WARNING "vDSO section %u has unsupported type %08X\n", i, shdr->sh_type); + WARN_ON(shdr->sh_size); + break; + } + } + dynsym += (unsigned long)ehdr - new_base; + for(i = 1; i < ndynsym; ++i) { + Elf32_Sym *sym = (void *)(dynsym + i * szdynsym); + + if (sym->st_shndx == SHN_ABS) + continue; + sym->st_value += new_base - old_base; + } +#endif +} +#else +#define relocate_vdso(ehdr, old, new, start, end) ((void)0) +#endif + /* * These symbols are defined by vsyscall.o to mark the bounds * of the ELF DSO images included therein. @@ -104,12 +245,16 @@ int __init sy...

...WARNING "vDSO section %u has unsupported type %08X\n", i, shdr->sh_type); + WARN_ON(shdr->sh_size); + break; + } + } + dynsym += (unsigned long)ehdr - new_base; + for(i = 1; i < ndynsym; ++i) { + Elf32_Sym *sym = (void *)(dynsym + i * szdynsym); + + if (sym->st_shndx == SHN_ABS) + continue; + sym->st_value += new_base - old_base; + } +#endif +} +#else +#define relocate_vdso(ehdr, old, new, start, end) ((void)0) +#endif + /* * These symbols are defined by vsyscall.o to mark the bounds * of the ELF DSO images included therein. @@ -104,12 +245,16 @@ int __init sy...

...WARNING "vDSO section %u has unsupported type %08X\n", i, shdr->sh_type); + WARN_ON(shdr->sh_size); + break; + } + } + dynsym += (unsigned long)ehdr - new_base; + for(i = 1; i < ndynsym; ++i) { + Elf32_Sym *sym = (void *)(dynsym + i * szdynsym); + + if (sym->st_shndx == SHN_ABS) + continue; + sym->st_value += new_base - old_base; + } +#endif +} +#else +#define relocate_vdso(ehdr, old, new, start, end) ((void)0) +#endif + /* * These symbols are defined by vsyscall.o to mark the bounds * of the ELF DSO images included therein. @@ -104,12 +245,16 @@ int __init sy...

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.

...Elf32_Off p_offset; @@ -251,6 +259,7 @@ struct elf64_phdr { Elf64_Xword p_memsz; /* Segment size in memory */ Elf64_Xword p_align; /* Segment alignment, file & memory */ }; +#endif /* __ASSEMBLY__ */ /* sh_type */ #define SHT_NULL 0 @@ -285,7 +294,8 @@ struct elf64_phdr { #define SHN_ABS 0xfff1 #define SHN_COMMON 0xfff2 #define SHN_HIRESERVE 0xffff - + +#ifndef __ASSEMBLY__ struct elf32_shdr { Elf32_Word sh_name; Elf32_Word sh_type; @@ -311,6 +321,7 @@ struct elf64_shdr { Elf64_Xword sh_addralign; /* Section alignment */ Elf64_Xword sh_entsize; /* Entry size if se...

...Elf32_Off p_offset; @@ -251,6 +259,7 @@ struct elf64_phdr { Elf64_Xword p_memsz; /* Segment size in memory */ Elf64_Xword p_align; /* Segment alignment, file & memory */ }; +#endif /* __ASSEMBLY__ */ /* sh_type */ #define SHT_NULL 0 @@ -285,7 +294,8 @@ struct elf64_phdr { #define SHN_ABS 0xfff1 #define SHN_COMMON 0xfff2 #define SHN_HIRESERVE 0xffff - + +#ifndef __ASSEMBLY__ struct elf32_shdr { Elf32_Word sh_name; Elf32_Word sh_type; @@ -311,6 +321,7 @@ struct elf64_shdr { Elf64_Xword sh_addralign; /* Section alignment */ Elf64_Xword sh_entsize; /* Entry size if se...

...; + if (strcmp(secstrings+sechdrs[i].sh_name, ".dynsym") =3D=3D 0) { + Elf32_Sym *sym =3D (void *)hdr + sechdrs[i].sh_offset; + n =3D sechdrs[i].sh_size / sizeof(*sym); + for (j =3D 1; j < n; j++) { + int ndx =3D sym[j].st_shndx; + if (ndx =3D=3D SHN_UNDEF || ndx =3D=3D SHN_ABS) + continue; + sym[j].st_value +=3D VSYSCALL_RELOCATION; + } + } else if (strcmp(secstrings+sechdrs[i].sh_name, ".dynamic") =3D=3D 0) { + Elf32_Dyn *dyn =3D (void *)hdr + sechdrs[i].sh_offset; + int tag; + while ((tag =3D (++dyn)->d_tag) !=3D DT_NULL) { + if (tag =3...

...; + if (strcmp(secstrings+sechdrs[i].sh_name, ".dynsym") =3D=3D 0) { + Elf32_Sym *sym =3D (void *)hdr + sechdrs[i].sh_offset; + n =3D sechdrs[i].sh_size / sizeof(*sym); + for (j =3D 1; j < n; j++) { + int ndx =3D sym[j].st_shndx; + if (ndx =3D=3D SHN_UNDEF || ndx =3D=3D SHN_ABS) + continue; + sym[j].st_value +=3D VSYSCALL_RELOCATION; + } + } else if (strcmp(secstrings+sechdrs[i].sh_name, ".dynamic") =3D=3D 0) { + Elf32_Dyn *dyn =3D (void *)hdr + sechdrs[i].sh_offset; + int tag; + while ((tag =3D (++dyn)->d_tag) !=3D DT_NULL) { + if (tag =3...

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 --