search for: p_vaddr

...om32/lib/sys/module/i386/elf_module.c in the load_segments() function, particularly when iterating through the module's program headers and loading the PT_LOAD ones. The code hits a program section which has a zero on-disk size, the cr_pht->p_filesz field is 0, and looking at the cr_pht->p_vaddr and comparing that with an objdump of the ldlinux.e32 file, that was the .BSS section, and it's reasonable for it to not be stored in the file, the memory should be initialized to zero, and the System V ABI document, chapter 5 [0] specifies that if the on-file size of a section is smaller than...

...overridden further down... */ + + ph64 = (Elf64_Phdr *) (cptr + eh64->e_phoff); + + for (i = 0; i < eh64->e_phnum; i++) { + if (ph64->p_type == PT_LOAD || ph64->p_type == PT_PHDR) { + /* + * This loads at p_paddr, which matches Grub. However, if + * e_entry falls within the p_vaddr range of this PHDR, then + * adjust it to match the p_paddr range... this is how Grub + * behaves, so it's by definition correct (it doesn't have to + * make sense...) + */ + addr_t addr = ph64->p_paddr; + addr_t msize = ph64->p_memsz; + addr_t dsize = min(msize, ph64->p...

.../* If the entry point is within this program header, set the real + * entry point to the correct physical address. See GRUB's stage2 + * (line 620) for a similar calculation. */ + if( + (ehdr->e_entry >= phdr[i].p_vaddr) + && + (ehdr->e_entry < (phdr[i].p_vaddr + run_size)) + ) { + realEntry = (ehdr->e_entry + phdr[i].p_paddr) - phdr[i].p_vaddr; + } + /* Place the segment where it wants to be...

This is a new version of the unified lguest launcher that applies to the current tree. According to rusty's suggestion, I'm bothering less to be able to load 32 bit kernels on 64-bit machines: changing the launcher for such case would be the easy part! In the absence of further objections, I'll commit it. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> -- =

This is a new version of the unified lguest launcher that applies to the current tree. According to rusty's suggestion, I'm bothering less to be able to load 32 bit kernels on 64-bit machines: changing the launcher for such case would be the easy part! In the absence of further objections, I'll commit it. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> -- =

...ALLOC section is not part of the memory image and not used by the program (unless for some rare introspection use cases) * adding a SHF_ALLOC section is difficult. You likely need to fix the containing PT_LOAD segment. llvm-objcopy only does the base p_offset fix. You need to take care p_vaddr/p_paddr/p_filesz/p_memsz by your self. + adding a section smaller than the known lowest address (ET_EXEC with a non-zero image base) or larger than the known largest address: The PT_LOAD fixes are doable. + adding a section within the existing address ranges: this is very difficult...

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 @@

...i, phdr[i].p_memsz, (void *)phdr[i].p_paddr); + /* We map everything private, writable. */ + if (phdr[i].p_paddr + phdr[i].p_memsz > mem) + errx(1, "Segment %i overlaps end of memory", i); + + /* We expect linear address space. */ + if (!*page_offset) + *page_offset = phdr[i].p_vaddr - phdr[i].p_paddr; + else if ((*page_offset != phdr[i].p_vaddr - phdr[i].p_paddr) && + phdr[i].p_vaddr != VSYSCALL_START) + errx(1, "Page offset of section %i different (got %lx, expected %lx)", + i, (phdr[i].p_vaddr - phdr[i].p_paddr), *page_offset); + + /* Recent l...

...i, phdr[i].p_memsz, (void *)phdr[i].p_paddr); + /* We map everything private, writable. */ + if (phdr[i].p_paddr + phdr[i].p_memsz > mem) + errx(1, "Segment %i overlaps end of memory", i); + + /* We expect linear address space. */ + if (!*page_offset) + *page_offset = phdr[i].p_vaddr - phdr[i].p_paddr; + else if ((*page_offset != phdr[i].p_vaddr - phdr[i].p_paddr) && + phdr[i].p_vaddr != VSYSCALL_START) + errx(1, "Page offset of section %i different (got %lx, expected %lx)", + i, (phdr[i].p_vaddr - phdr[i].p_paddr), *page_offset); + + /* Recent l...

...ON(ehdr->e_ehsize < sizeof(*ehdr)); + ehdr->e_entry += new_base - old_base; + BUG_ON(ehdr->e_phentsize < sizeof(Elf32_Phdr)); + for (i = 0; i < ehdr->e_phnum; ++i) { + Elf32_Phdr *phdr = (void *)((unsigned long)ehdr + ehdr->e_phoff + i * ehdr->e_phentsize); + + phdr->p_vaddr += new_base - old_base; + switch(phdr->p_type) { + case PT_LOAD: + case PT_NOTE: + break; + case PT_DYNAMIC: { + Elf32_Dyn *dyn = (void *)(phdr->p_vaddr - new_base + (unsigned long)ehdr); + unsigned j; + + for(j = 0; dyn[j].d_tag != DT_NULL; ++j) { + switch(dyn[j].d_tag) {...

...ON(ehdr->e_ehsize < sizeof(*ehdr)); + ehdr->e_entry += new_base - old_base; + BUG_ON(ehdr->e_phentsize < sizeof(Elf32_Phdr)); + for (i = 0; i < ehdr->e_phnum; ++i) { + Elf32_Phdr *phdr = (void *)((unsigned long)ehdr + ehdr->e_phoff + i * ehdr->e_phentsize); + + phdr->p_vaddr += new_base - old_base; + switch(phdr->p_type) { + case PT_LOAD: + case PT_NOTE: + break; + case PT_DYNAMIC: { + Elf32_Dyn *dyn = (void *)(phdr->p_vaddr - new_base + (unsigned long)ehdr); + unsigned j; + + for(j = 0; dyn[j].d_tag != DT_NULL; ++j) { + switch(dyn[j].d_tag) {...

...ON(ehdr->e_ehsize < sizeof(*ehdr)); + ehdr->e_entry += new_base - old_base; + BUG_ON(ehdr->e_phentsize < sizeof(Elf32_Phdr)); + for (i = 0; i < ehdr->e_phnum; ++i) { + Elf32_Phdr *phdr = (void *)((unsigned long)ehdr + ehdr->e_phoff + i * ehdr->e_phentsize); + + phdr->p_vaddr += new_base - old_base; + switch(phdr->p_type) { + case PT_LOAD: + case PT_NOTE: + break; + case PT_DYNAMIC: { + Elf32_Dyn *dyn = (void *)(phdr->p_vaddr - new_base + (unsigned long)ehdr); + unsigned j; + + for(j = 0; dyn[j].d_tag != DT_NULL; ++j) { + switch(dyn[j].d_tag) {...

...- phdr)/(e_phdr1 - phdr) # e_phnum + .word 40 # e_shentsize + .word 0 # e_shnum + .word 0 # e_shstrndx +e_ehdr: + + .org 71 +normalize: # Normalize the start address ljmp $BOOTSEG, $start2 + + .org 80 +phdr: + .int PT_LOAD # p_type + .int _text # p_offset + .int 0x8000 # p_vaddr + .int 0x8000 # p_paddr + .int _filesz # p_filesz + .int _memsz # p_memsz + .int PF_R | PF_W | PF_X # p_flags + .int 4 # p_align +e_phdr1: + .int PT_LOAD # p_type + .int kernel - bootsect_start # p_offset + .int LOAD_PHYSICAL_ADDR # p_vaddr + .int LOAD_PHYSICAL_ADDR...

...- phdr)/(e_phdr1 - phdr) # e_phnum + .word 40 # e_shentsize + .word 0 # e_shnum + .word 0 # e_shstrndx +e_ehdr: + + .org 71 +normalize: # Normalize the start address ljmp $BOOTSEG, $start2 + + .org 80 +phdr: + .int PT_LOAD # p_type + .int _text # p_offset + .int 0x8000 # p_vaddr + .int 0x8000 # p_paddr + .int _filesz # p_filesz + .int _memsz # p_memsz + .int PF_R | PF_W | PF_X # p_flags + .int 4 # p_align +e_phdr1: + .int PT_LOAD # p_type + .int kernel - bootsect_start # p_offset + .int LOAD_PHYSICAL_ADDR # p_vaddr + .int LOAD_PHYSICAL_ADDR...

Hey, LLVM has logic to parse ELF and PE binaries using `llvm::object::createBinary`. I tried to search in the codebase to see if there's a possibility to add/remove sections after parsing a binary and re-write the binary to another location. Basically, like what llvm-objcopy does. Can you point me to the right classes to look into, if this is something that LLVM has? Many thanks Joseph

...UNC(struct kexec_info *info, dbgprintf_phdr("vmcoreinfo header", phdr); } - if (has_vmcoreinfo_xen) { - phdr = (PHDR *) bufp; - bufp += sizeof(PHDR); - phdr->p_type = PT_NOTE; - phdr->p_flags = 0; - phdr->p_offset = phdr->p_paddr = vmcoreinfo_addr_xen; - phdr->p_vaddr = 0; - phdr->p_filesz = phdr->p_memsz = vmcoreinfo_len_xen; - /* Do we need any alignment of segments? */ - phdr->p_align = 0; - - (elf->e_phnum)++; - dbgprintf_phdr("vmcoreinfo_xen header", phdr); - } - /* Setup an PT_LOAD type program header for the region where...

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

...i, phdr[i].p_memsz, (void *)phdr[i].p_paddr); + /* We map everything private, writable. */ + if (phdr[i].p_paddr + phdr[i].p_memsz > mem) + errx(1, "Segment %i overlaps end of memory", i); + + /* We expect linear address space. */ + if (!*page_offset) + *page_offset = phdr[i].p_vaddr - phdr[i].p_paddr; + else if (*page_offset != phdr[i].p_vaddr - phdr[i].p_paddr) + errx(1, "Page offset of section %i different", i); + + /* Recent ld versions don't page align any more. */ + if (phdr[i].p_paddr % getpagesize()) { + phdr[i].p_filesz += (phdr[i].p_paddr % getpag...