1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_ELFCORE_H 3 #define _LINUX_ELFCORE_H 4 5 #include <linux/user.h> 6 #include <linux/bug.h> 7 #include <linux/sched/task_stack.h> 8 9 #include <asm/elf.h> 10 #include <uapi/linux/elfcore.h> 11 12 struct coredump_params; 13 14 static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs) 15 { 16 #ifdef ELF_CORE_COPY_REGS 17 ELF_CORE_COPY_REGS((*elfregs), regs) 18 #else 19 BUG_ON(sizeof(*elfregs) != sizeof(*regs)); 20 *(struct pt_regs *)elfregs = *regs; 21 #endif 22 } 23 24 static inline void elf_core_copy_kernel_regs(elf_gregset_t *elfregs, struct pt_regs *regs) 25 { 26 #ifdef ELF_CORE_COPY_KERNEL_REGS 27 ELF_CORE_COPY_KERNEL_REGS((*elfregs), regs); 28 #else 29 elf_core_copy_regs(elfregs, regs); 30 #endif 31 } 32 33 static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs) 34 { 35 #if defined (ELF_CORE_COPY_TASK_REGS) 36 return ELF_CORE_COPY_TASK_REGS(t, elfregs); 37 #elif defined (task_pt_regs) 38 elf_core_copy_regs(elfregs, task_pt_regs(t)); 39 #endif 40 return 0; 41 } 42 43 extern int dump_fpu (struct pt_regs *, elf_fpregset_t *); 44 45 static inline int elf_core_copy_task_fpregs(struct task_struct *t, struct pt_regs *regs, elf_fpregset_t *fpu) 46 { 47 #ifdef ELF_CORE_COPY_FPREGS 48 return ELF_CORE_COPY_FPREGS(t, fpu); 49 #else 50 return dump_fpu(regs, fpu); 51 #endif 52 } 53 54 #ifdef ELF_CORE_COPY_XFPREGS 55 static inline int elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu) 56 { 57 return ELF_CORE_COPY_XFPREGS(t, xfpu); 58 } 59 #endif 60 61 /* 62 * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out 63 * extra segments containing the gate DSO contents. Dumping its 64 * contents makes post-mortem fully interpretable later without matching up 65 * the same kernel and hardware config to see what PC values meant. 66 * Dumping its extra ELF program headers includes all the other information 67 * a debugger needs to easily find how the gate DSO was being used. 68 */ 69 extern Elf_Half elf_core_extra_phdrs(void); 70 extern int 71 elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset); 72 extern int 73 elf_core_write_extra_data(struct coredump_params *cprm); 74 extern size_t elf_core_extra_data_size(void); 75 76 #endif /* _LINUX_ELFCORE_H */ 77