powerpc/vdso: Replace vdso_base by vdso
All other architectures but s390 use a void pointer named 'vdso' to reference the VDSO mapping. In a following patch, the VDSO data page will be put in front of text, vdso_base will then not anymore point to VDSO text. To avoid confusion between vdso_base and VDSO text, rename vdso_base into vdso and make it a void __user *. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8e6cefe474aa4ceba028abb729485cd46c140990.1601197618.git.christophe.leroy@csgroup.eu
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526a9c4a72
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c102f07667
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@ -90,7 +90,7 @@ struct hash_pte {
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typedef struct {
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unsigned long id;
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unsigned long vdso_base;
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void __user *vdso;
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} mm_context_t;
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void update_bats(void);
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@ -111,7 +111,7 @@ typedef struct {
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struct hash_mm_context *hash_context;
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unsigned long vdso_base;
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void __user *vdso;
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/*
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* pagetable fragment support
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*/
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@ -169,7 +169,7 @@ do { \
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NEW_AUX_ENT(AT_DCACHEBSIZE, dcache_bsize); \
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NEW_AUX_ENT(AT_ICACHEBSIZE, icache_bsize); \
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NEW_AUX_ENT(AT_UCACHEBSIZE, ucache_bsize); \
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VDSO_AUX_ENT(AT_SYSINFO_EHDR, current->mm->context.vdso_base); \
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VDSO_AUX_ENT(AT_SYSINFO_EHDR, (unsigned long)current->mm->context.vdso);\
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ARCH_DLINFO_CACHE_GEOMETRY; \
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} while (0)
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@ -262,8 +262,10 @@ extern void arch_exit_mmap(struct mm_struct *mm);
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static inline void arch_unmap(struct mm_struct *mm,
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unsigned long start, unsigned long end)
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{
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if (start <= mm->context.vdso_base && mm->context.vdso_base < end)
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mm->context.vdso_base = 0;
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unsigned long vdso_base = (unsigned long)mm->context.vdso;
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if (start <= vdso_base && vdso_base < end)
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mm->context.vdso = NULL;
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}
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#ifdef CONFIG_PPC_MEM_KEYS
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@ -57,7 +57,7 @@
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typedef struct {
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unsigned int id;
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unsigned int active;
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unsigned long vdso_base;
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void __user *vdso;
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} mm_context_t;
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#endif /* !__ASSEMBLY__ */
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@ -108,7 +108,7 @@ extern unsigned int tlb_44x_index;
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typedef struct {
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unsigned int id;
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unsigned int active;
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unsigned long vdso_base;
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void __user *vdso;
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} mm_context_t;
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/* patch sites */
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@ -181,7 +181,7 @@ void mmu_pin_tlb(unsigned long top, bool readonly);
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typedef struct {
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unsigned int id;
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unsigned int active;
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unsigned long vdso_base;
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void __user *vdso;
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void *pte_frag;
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} mm_context_t;
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@ -238,7 +238,7 @@ extern unsigned int tlbcam_index;
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typedef struct {
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unsigned int id;
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unsigned int active;
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unsigned long vdso_base;
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void __user *vdso;
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} mm_context_t;
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/* Page size definitions, common between 32 and 64-bit
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@ -801,8 +801,8 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
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}
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/* Save user registers on the stack */
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if (vdso32_rt_sigtramp && tsk->mm->context.vdso_base) {
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tramp = tsk->mm->context.vdso_base + vdso32_rt_sigtramp;
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if (vdso32_rt_sigtramp && tsk->mm->context.vdso) {
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tramp = (unsigned long)tsk->mm->context.vdso + vdso32_rt_sigtramp;
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} else {
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tramp = (unsigned long)mctx->mc_pad;
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/* Set up the sigreturn trampoline: li r0,sigret; sc */
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@ -901,8 +901,8 @@ int handle_signal32(struct ksignal *ksig, sigset_t *oldset,
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else
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unsafe_save_user_regs(regs, mctx, tm_mctx, 1, failed);
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if (vdso32_sigtramp && tsk->mm->context.vdso_base) {
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tramp = tsk->mm->context.vdso_base + vdso32_sigtramp;
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if (vdso32_sigtramp && tsk->mm->context.vdso) {
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tramp = (unsigned long)tsk->mm->context.vdso + vdso32_sigtramp;
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} else {
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tramp = (unsigned long)mctx->mc_pad;
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/* Set up the sigreturn trampoline: li r0,sigret; sc */
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@ -854,8 +854,8 @@ int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
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tsk->thread.fp_state.fpscr = 0;
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/* Set up to return from userspace. */
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if (vdso64_rt_sigtramp && tsk->mm->context.vdso_base) {
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regs->nip = tsk->mm->context.vdso_base + vdso64_rt_sigtramp;
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if (vdso64_rt_sigtramp && tsk->mm->context.vdso) {
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regs->nip = (unsigned long)tsk->mm->context.vdso + vdso64_rt_sigtramp;
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} else {
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err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]);
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if (err)
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@ -123,7 +123,7 @@ static int vdso_mremap(const struct vm_special_mapping *sm, struct vm_area_struc
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if (new_size != text_size + PAGE_SIZE)
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return -EINVAL;
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current->mm->context.vdso_base = new_vma->vm_start;
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current->mm->context.vdso = (void __user *)new_vma->vm_start;
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return 0;
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}
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@ -198,7 +198,7 @@ static int __arch_setup_additional_pages(struct linux_binprm *bprm, int uses_int
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* install_special_mapping or the perf counter mmap tracking code
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* will fail to recognise it as a vDSO.
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*/
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current->mm->context.vdso_base = vdso_base;
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mm->context.vdso = (void __user *)vdso_base;
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/*
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* our vma flags don't have VM_WRITE so by default, the process isn't
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@ -221,7 +221,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
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struct mm_struct *mm = current->mm;
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int rc;
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mm->context.vdso_base = 0;
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mm->context.vdso = NULL;
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if (!vdso_ready)
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return 0;
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@ -231,7 +231,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
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rc = __arch_setup_additional_pages(bprm, uses_interp);
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if (rc)
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mm->context.vdso_base = 0;
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mm->context.vdso = NULL;
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mmap_write_unlock(mm);
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return rc;
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@ -59,8 +59,8 @@ static int is_sigreturn_32_address(unsigned int nip, unsigned int fp)
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{
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if (nip == fp + offsetof(struct signal_frame_32, mctx.mc_pad))
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return 1;
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if (vdso32_sigtramp && current->mm->context.vdso_base &&
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nip == current->mm->context.vdso_base + vdso32_sigtramp)
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if (vdso32_sigtramp && current->mm->context.vdso &&
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nip == (unsigned long)current->mm->context.vdso + vdso32_sigtramp)
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return 1;
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return 0;
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}
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@ -70,8 +70,8 @@ static int is_rt_sigreturn_32_address(unsigned int nip, unsigned int fp)
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if (nip == fp + offsetof(struct rt_signal_frame_32,
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uc.uc_mcontext.mc_pad))
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return 1;
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if (vdso32_rt_sigtramp && current->mm->context.vdso_base &&
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nip == current->mm->context.vdso_base + vdso32_rt_sigtramp)
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if (vdso32_rt_sigtramp && current->mm->context.vdso &&
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nip == (unsigned long)current->mm->context.vdso + vdso32_rt_sigtramp)
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return 1;
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return 0;
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}
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@ -68,8 +68,8 @@ static int is_sigreturn_64_address(unsigned long nip, unsigned long fp)
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{
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if (nip == fp + offsetof(struct signal_frame_64, tramp))
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return 1;
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if (vdso64_rt_sigtramp && current->mm->context.vdso_base &&
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nip == current->mm->context.vdso_base + vdso64_rt_sigtramp)
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if (vdso64_rt_sigtramp && current->mm->context.vdso &&
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nip == (unsigned long)current->mm->context.vdso + vdso64_rt_sigtramp)
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return 1;
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return 0;
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}
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