diff options
Diffstat (limited to 'arch/arm/include/asm/processor.h')
| -rw-r--r-- | arch/arm/include/asm/processor.h | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h index c3d5fc124a05..1bf65b47808a 100644 --- a/arch/arm/include/asm/processor.h +++ b/arch/arm/include/asm/processor.h @@ -45,17 +45,36 @@ struct thread_struct { struct debug_info debug; }; -#define INIT_THREAD { } +/* + * Everything usercopied to/from thread_struct is statically-sized, so + * no hardened usercopy whitelist is needed. + */ +static inline void arch_thread_struct_whitelist(unsigned long *offset, + unsigned long *size) +{ + *offset = *size = 0; +} -#ifdef CONFIG_MMU -#define nommu_start_thread(regs) do { } while (0) -#else -#define nommu_start_thread(regs) regs->ARM_r10 = current->mm->start_data -#endif +#define INIT_THREAD { } #define start_thread(regs,pc,sp) \ ({ \ + unsigned long r7, r8, r9; \ + \ + if (IS_ENABLED(CONFIG_BINFMT_ELF_FDPIC)) { \ + r7 = regs->ARM_r7; \ + r8 = regs->ARM_r8; \ + r9 = regs->ARM_r9; \ + } \ memset(regs->uregs, 0, sizeof(regs->uregs)); \ + if (IS_ENABLED(CONFIG_BINFMT_ELF_FDPIC) && \ + current->personality & FDPIC_FUNCPTRS) { \ + regs->ARM_r7 = r7; \ + regs->ARM_r8 = r8; \ + regs->ARM_r9 = r9; \ + regs->ARM_r10 = current->mm->start_data; \ + } else if (!IS_ENABLED(CONFIG_MMU)) \ + regs->ARM_r10 = current->mm->start_data; \ if (current->personality & ADDR_LIMIT_32BIT) \ regs->ARM_cpsr = USR_MODE; \ else \ @@ -65,7 +84,6 @@ struct thread_struct { regs->ARM_cpsr |= PSR_ENDSTATE; \ regs->ARM_pc = pc & ~1; /* pc */ \ regs->ARM_sp = sp; /* sp */ \ - nommu_start_thread(regs); \ }) /* Forward declaration, a strange C thing */ |