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
typedef struct {
unsigned long id;
- unsigned long vdso_base;
+ void __user *vdso;
} mm_context_t;
void update_bats(void);
struct hash_mm_context *hash_context;
- unsigned long vdso_base;
+ void __user *vdso;
/*
* pagetable fragment support
*/
NEW_AUX_ENT(AT_DCACHEBSIZE, dcache_bsize); \
NEW_AUX_ENT(AT_ICACHEBSIZE, icache_bsize); \
NEW_AUX_ENT(AT_UCACHEBSIZE, ucache_bsize); \
- VDSO_AUX_ENT(AT_SYSINFO_EHDR, current->mm->context.vdso_base); \
+ VDSO_AUX_ENT(AT_SYSINFO_EHDR, (unsigned long)current->mm->context.vdso);\
ARCH_DLINFO_CACHE_GEOMETRY; \
} while (0)
static inline void arch_unmap(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
- if (start <= mm->context.vdso_base && mm->context.vdso_base < end)
- mm->context.vdso_base = 0;
+ unsigned long vdso_base = (unsigned long)mm->context.vdso;
+
+ if (start <= vdso_base && vdso_base < end)
+ mm->context.vdso = NULL;
}
#ifdef CONFIG_PPC_MEM_KEYS
typedef struct {
unsigned int id;
unsigned int active;
- unsigned long vdso_base;
+ void __user *vdso;
} mm_context_t;
#endif /* !__ASSEMBLY__ */
typedef struct {
unsigned int id;
unsigned int active;
- unsigned long vdso_base;
+ void __user *vdso;
} mm_context_t;
/* patch sites */
typedef struct {
unsigned int id;
unsigned int active;
- unsigned long vdso_base;
+ void __user *vdso;
void *pte_frag;
} mm_context_t;
typedef struct {
unsigned int id;
unsigned int active;
- unsigned long vdso_base;
+ void __user *vdso;
} mm_context_t;
/* Page size definitions, common between 32 and 64-bit
}
/* Save user registers on the stack */
- if (vdso32_rt_sigtramp && tsk->mm->context.vdso_base) {
- tramp = tsk->mm->context.vdso_base + vdso32_rt_sigtramp;
+ if (vdso32_rt_sigtramp && tsk->mm->context.vdso) {
+ tramp = (unsigned long)tsk->mm->context.vdso + vdso32_rt_sigtramp;
} else {
tramp = (unsigned long)mctx->mc_pad;
/* Set up the sigreturn trampoline: li r0,sigret; sc */
else
unsafe_save_user_regs(regs, mctx, tm_mctx, 1, failed);
- if (vdso32_sigtramp && tsk->mm->context.vdso_base) {
- tramp = tsk->mm->context.vdso_base + vdso32_sigtramp;
+ if (vdso32_sigtramp && tsk->mm->context.vdso) {
+ tramp = (unsigned long)tsk->mm->context.vdso + vdso32_sigtramp;
} else {
tramp = (unsigned long)mctx->mc_pad;
/* Set up the sigreturn trampoline: li r0,sigret; sc */
tsk->thread.fp_state.fpscr = 0;
/* Set up to return from userspace. */
- if (vdso64_rt_sigtramp && tsk->mm->context.vdso_base) {
- regs->nip = tsk->mm->context.vdso_base + vdso64_rt_sigtramp;
+ if (vdso64_rt_sigtramp && tsk->mm->context.vdso) {
+ regs->nip = (unsigned long)tsk->mm->context.vdso + vdso64_rt_sigtramp;
} else {
err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]);
if (err)
if (new_size != text_size + PAGE_SIZE)
return -EINVAL;
- current->mm->context.vdso_base = new_vma->vm_start;
+ current->mm->context.vdso = (void __user *)new_vma->vm_start;
return 0;
}
* install_special_mapping or the perf counter mmap tracking code
* will fail to recognise it as a vDSO.
*/
- current->mm->context.vdso_base = vdso_base;
+ mm->context.vdso = (void __user *)vdso_base;
/*
* our vma flags don't have VM_WRITE so by default, the process isn't
struct mm_struct *mm = current->mm;
int rc;
- mm->context.vdso_base = 0;
+ mm->context.vdso = NULL;
if (!vdso_ready)
return 0;
rc = __arch_setup_additional_pages(bprm, uses_interp);
if (rc)
- mm->context.vdso_base = 0;
+ mm->context.vdso = NULL;
mmap_write_unlock(mm);
return rc;
{
if (nip == fp + offsetof(struct signal_frame_32, mctx.mc_pad))
return 1;
- if (vdso32_sigtramp && current->mm->context.vdso_base &&
- nip == current->mm->context.vdso_base + vdso32_sigtramp)
+ if (vdso32_sigtramp && current->mm->context.vdso &&
+ nip == (unsigned long)current->mm->context.vdso + vdso32_sigtramp)
return 1;
return 0;
}
if (nip == fp + offsetof(struct rt_signal_frame_32,
uc.uc_mcontext.mc_pad))
return 1;
- if (vdso32_rt_sigtramp && current->mm->context.vdso_base &&
- nip == current->mm->context.vdso_base + vdso32_rt_sigtramp)
+ if (vdso32_rt_sigtramp && current->mm->context.vdso &&
+ nip == (unsigned long)current->mm->context.vdso + vdso32_rt_sigtramp)
return 1;
return 0;
}
{
if (nip == fp + offsetof(struct signal_frame_64, tramp))
return 1;
- if (vdso64_rt_sigtramp && current->mm->context.vdso_base &&
- nip == current->mm->context.vdso_base + vdso64_rt_sigtramp)
+ if (vdso64_rt_sigtramp && current->mm->context.vdso &&
+ nip == (unsigned long)current->mm->context.vdso + vdso64_rt_sigtramp)
return 1;
return 0;
}