Prepare inside of core. Not tested.
modified: arch/x86/kernel/gencore.c modified: arch/x86/kernel/include/elfcore.h modified: kernel/mem.c
This commit is contained in:
Naoki Hamada
@ -24,38 +24,47 @@
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int gencore(struct process *proc, void *regs,
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struct coretable **coretable, int *chunks)
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{
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struct coretable *ct;
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Elf64_Ehdr eh;
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Elf64_Phdr *ph;
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void *note;
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struct vm_range *range;
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struct process_vm *vm = proc->vm;
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int segs = 1; /* the first one is for NOTES */
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int notesize, phsize;
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unsigned int offset = 0;
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int i;
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if (vm == NULL) {
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dkprintf("no vm found.\n");
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return -1;
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}
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list_for_each_entry(range, &vm->vm_range_list, list) {
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dkprintf("start:%x end:%x flag:%x objoff:%x\n",
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range->start, range->end, range->flag, range->objoff);
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if ((range->flag && VR_RESERVED) == 0)
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segs++;
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}
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dkprintf("we have %d segs including one for NOTES.\n\n", segs);
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{
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struct vm_regions region = proc->vm->region;
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dkprintf("text: %x-%x\n", region.text_start, region.text_end);
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dkprintf("data: %x-%x\n", region.data_start, region.data_end);
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dkprintf("brk: %x-%x\n", region.brk_start, region.brk_end);
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dkprintf("map: %x-%x\n", region.map_start, region.map_end);
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dkprintf("text: %x-%x\n", region.text_start, region.text_end);
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dkprintf("data: %x-%x\n", region.data_start, region.data_end);
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dkprintf("brk: %x-%x\n", region.brk_start, region.brk_end);
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dkprintf("map: %x-%x\n", region.map_start, region.map_end);
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dkprintf("stack: %x-%x\n", region.stack_start, region.stack_end);
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dkprintf("user: %x-%x\n", region.user_start, region.user_end);
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dkprintf("user: %x-%x\n\n", region.user_start, region.user_end);
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}
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{
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struct vm_range *range;
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struct process_vm *vm = proc->vm;
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if (vm == NULL) {
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dkprintf("no vm found.\n");
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return -1;
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}
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list_for_each_entry(range, &vm->vm_range_list, list) {
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dkprintf("start:%x end:%x flag:%x objoff:%x\n",
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range->start, range->end, range->flag, range->objoff);
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}
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}
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dkprintf("now generate a core file image\n");
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#define DUMMY
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#ifdef DUMMY
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/* ELF header */
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@ -67,32 +76,137 @@ int gencore(struct process *proc, void *regs,
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eh.e_ident[EI_DATA] = ELFDATA2LSB;
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eh.e_ident[EI_VERSION] = El_VERSION;
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eh.e_ident[EI_OSABI] = ELFOSABI_NONE;
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eh.e_ident[EI_ABIVERSION] = EI_ABIVERSION;
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eh.e_ident[EI_ABIVERSION] = El_ABIVERSION_NONE;
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eh.e_type = ET_CORE;
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eh.e_machine = EM_K10M;
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eh.e_version = EV_CURRENT;
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eh.e_entry = 0; /* Do we really need this? */
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eh.e_phoff = 64; /* fixed */
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eh.e_shoff = 0; /* no section header */
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eh.e_flags = 0;
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eh.e_ehsize = 64; /* fixed */
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eh.e_phentsize = 56; /* fixed */
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eh.e_phnum = segs;
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eh.e_shentsize = 0;
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eh.e_shnum = 0;
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eh.e_shstrndx = 0;
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dkprintf("now generate a core file image\n");
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offset += 64;
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notesize = 1024; /* dummy */
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/* program header table */
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/* segments */
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phsize = sizeof(Elf64_Phdr) * segs;
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ph = kmalloc(phsize, IHK_MC_AP_NOWAIT);
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if (ph == NULL) {
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dkprintf("could not alloc a program header table.\n");
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goto fail;
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}
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offset += phsize;
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/* prgram header for NOTE segment is exceptional */
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ph[0].p_type = PT_NOTE;
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ph[0].p_flags = 0;
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ph[0].p_offset = offset;
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ph[0].p_vaddr = 0;
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ph[0].p_paddr = 0;
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ph[0].p_filesz = 0;
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ph[0].p_memsz = notesize;
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ph[0].p_align = 1024;
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/* program header for each memory chunk */
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i = 1;
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list_for_each_entry(range, &vm->vm_range_list, list) {
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unsigned long flag = range->flag;
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unsigned long size = range->end - range->start;
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ph[i].p_type = PT_LOAD;
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/* xxx */
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ph[i].p_flags = ((flag & VR_PROT_READ) ? PF_R : 0)
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| ((flag & VR_PROT_WRITE) ? PF_W : 0)
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| ((flag & VR_PROT_EXEC) ? PF_X : 0);
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ph[i].p_offset = offset;
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ph[i].p_vaddr = range->start;
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ph[i].p_paddr = 0;
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ph[i].p_filesz = 0; /* How can we know this? */
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ph[i].p_memsz = size;
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ph[i].p_align = 1024; /* ??? */
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i++;
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offset += size;
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}
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/* note */
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note = kmalloc(notesize, IHK_MC_AP_NOWAIT);
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if (note == NULL) {
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dkprintf("could not alloc note.\n");
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goto fail;
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}
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/* coretable to send to host */
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ct = kmalloc(sizeof(struct coretable) * (segs + 2), IHK_MC_AP_NOWAIT);
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if (!ct) {
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dkprintf("could not alloc a coretable.\n");
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goto fail;
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}
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ct[0].addr = virt_to_phys(&eh); /* ELF header */
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ct[0].len = 64;
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ct[1].addr = virt_to_phys(ph); /* program header table */
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ct[1].len = phsize;
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ct[2].addr = virt_to_phys(note); /* NOTE segment */
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ct[2].len = notesize;
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i = 3; /* memory segments */
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list_for_each_entry(range, &vm->vm_range_list, list) {
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ct[i].addr = virt_to_phys(range->start);
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ct[i].len = range->end - range->start;
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i++;
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}
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*chunks = segs + 2;
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#else /* dummy */
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*coretable = kmalloc(sizeof(struct coretable) * 3, IHK_MC_AP_NOWAIT);
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if (!*coretable) {
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dkprintf("could not alloc a coretable.\n");
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return -1;
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goto fail;
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}
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(*coretable)[0].len = 8;
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(*coretable)[0].addr = virt_to_phys("this is ");
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(*coretable)[1].len = 7;
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(*coretable)[1].addr = virt_to_phys("a test ");
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(*coretable)[2].len = 15;
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(*coretable)[2].addr = virt_to_phys("for coredump.\n");
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ct[0].len = 8;
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ct[0].addr = virt_to_phys("this is ");
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ct[1].len = 7;
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ct[1].addr = virt_to_phys("a test ");
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ct[2].len = 15;
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ct[2].addr = virt_to_phys("for coredump.\n");
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dkprintf("generated a core table.\n");
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*chunks = 3;
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#endif
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*coretable = ct;
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return 0;
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fail:
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if (ct)
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kfree(ct);
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if (ph)
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kfree(ph);
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if (note)
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kfree(note);
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return -1;
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}
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/* Free all the allocated spaces. */
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void freecore(struct coretable **coretable)
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{
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struct coretable *ct = *coretable;
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kfree(phys_to_virt(ct[2].addr)); /* NOTE segment */
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kfree(phys_to_virt(ct[1].addr)); /* ph */
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kfree(*coretable);
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}
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@ -51,7 +51,7 @@ typedef struct {
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#define ELFDATA2LSB 1 /* LSB */
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#define El_VERSION 1 /* defined to be the same as EV CURRENT */
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#define ELFOSABI_NONE 0 /* unspecied */
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#define EI_ABIVERSION 0 /* unspecied */ /* xxx */
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#define El_ABIVERSION_NONE 0 /* unspecied */
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#define ET_CORE 4 /* Core file */
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#define EM_K10M 181 /* Intel K10M */
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#define EV_CURRENT 1 /* Current version */
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@ -79,7 +79,7 @@ typedef struct note {
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Elf64_Xword descsz;
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Elf64_Xword type;
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char *contents; /* name char[namesz] and desc[descsz] */
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};
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} Elf64_Nhdr;
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#include "elfcoregpl.h"
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