[SPARC64]: Increase top of 32-bit process stack.
Put it one page below the top of the 32-bit address space.
This gives us ~16MB more address space to work with.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/binfmt_elf32.c b/arch/sparc64/kernel/binfmt_elf32.c
index a1a12d2..8a2abcc 100644
--- a/arch/sparc64/kernel/binfmt_elf32.c
+++ b/arch/sparc64/kernel/binfmt_elf32.c
@@ -153,7 +153,9 @@
#undef MODULE_DESCRIPTION
#undef MODULE_AUTHOR
+#include <asm/a.out.h>
+
#undef TASK_SIZE
-#define TASK_SIZE 0xf0000000
+#define TASK_SIZE STACK_TOP32
#include "../../../fs/binfmt_elf.c"
diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c
index 61dffb9..9019b41 100644
--- a/arch/sparc64/kernel/sys_sparc.c
+++ b/arch/sparc64/kernel/sys_sparc.c
@@ -30,6 +30,7 @@
#include <asm/ipc.h>
#include <asm/utrap.h>
#include <asm/perfctr.h>
+#include <asm/a.out.h>
/* #define DEBUG_UNIMP_SYSCALL */
@@ -130,7 +131,7 @@
}
if (test_thread_flag(TIF_32BIT))
- task_size = 0xf0000000UL;
+ task_size = STACK_TOP32;
if (unlikely(len > task_size || len >= VA_EXCLUDE_START))
return -ENOMEM;
@@ -203,7 +204,7 @@
{
struct vm_area_struct *vma;
struct mm_struct *mm = current->mm;
- unsigned long task_size = 0xf0000000UL;
+ unsigned long task_size = STACK_TOP32;
unsigned long addr = addr0;
int do_color_align;
@@ -370,7 +371,7 @@
mm->unmap_area = arch_unmap_area;
} else {
/* We know it's 32-bit */
- unsigned long task_size = 0xf0000000UL;
+ unsigned long task_size = STACK_TOP32;
unsigned long gap;
gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
@@ -388,7 +389,7 @@
asmlinkage unsigned long sparc_brk(unsigned long brk)
{
/* People could try to be nasty and use ta 0x6d in 32bit programs */
- if (test_thread_flag(TIF_32BIT) && brk >= 0xf0000000UL)
+ if (test_thread_flag(TIF_32BIT) && brk >= STACK_TOP32)
return current->mm->brk;
if (unlikely(straddles_64bit_va_hole(current->mm->brk, brk)))
@@ -554,10 +555,10 @@
retval = -EINVAL;
if (test_thread_flag(TIF_32BIT)) {
- if (len >= 0xf0000000UL)
+ if (len >= STACK_TOP32)
goto out_putf;
- if ((flags & MAP_FIXED) && addr > 0xf0000000UL - len)
+ if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len)
goto out_putf;
} else {
if (len >= VA_EXCLUDE_START)
diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index 417727b..0e41df0 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -62,6 +62,7 @@
#include <asm/fpumacro.h>
#include <asm/semaphore.h>
#include <asm/mmu_context.h>
+#include <asm/a.out.h>
asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
{
@@ -1039,15 +1040,15 @@
unsigned long ret = -EINVAL;
unsigned long new_addr = __new_addr;
- if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
+ if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
goto out;
- if (addr > 0xf0000000UL - old_len)
+ if (addr > STACK_TOP32 - old_len)
goto out;
down_write(¤t->mm->mmap_sem);
if (flags & MREMAP_FIXED) {
- if (new_addr > 0xf0000000UL - new_len)
+ if (new_addr > STACK_TOP32 - new_len)
goto out_sem;
- } else if (addr > 0xf0000000UL - new_len) {
+ } else if (addr > STACK_TOP32 - new_len) {
unsigned long map_flags = 0;
struct file *file = NULL;
diff --git a/arch/sparc64/solaris/misc.c b/arch/sparc64/solaris/misc.c
index 3ab4677..5284996 100644
--- a/arch/sparc64/solaris/misc.c
+++ b/arch/sparc64/solaris/misc.c
@@ -90,7 +90,7 @@
len = PAGE_ALIGN(len);
if(!(flags & MAP_FIXED))
addr = 0;
- else if (len > 0xf0000000UL || addr > 0xf0000000UL - len)
+ else if (len > STACK_TOP32 || addr > STACK_TOP32 - len)
goto out_putf;
ret_type = flags & _MAP_NEW;
flags &= ~_MAP_NEW;
@@ -102,7 +102,7 @@
(unsigned long) prot, (unsigned long) flags, off);
up_write(¤t->mm->mmap_sem);
if(!ret_type)
- retval = ((retval < 0xf0000000) ? 0 : retval);
+ retval = ((retval < STACK_TOP32) ? 0 : retval);
out_putf:
if (file)
diff --git a/include/asm-sparc64/a.out.h b/include/asm-sparc64/a.out.h
index faac321..35cb5c9 100644
--- a/include/asm-sparc64/a.out.h
+++ b/include/asm-sparc64/a.out.h
@@ -95,9 +95,11 @@
#ifdef __KERNEL__
+#define STACK_TOP32 ((1UL << 32UL) - PAGE_SIZE)
+#define STACK_TOP64 (0x0000080000000000UL - (1UL << 32UL))
+
#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
- 0xf0000000 : \
- (0x0000080000000000UL - (1UL << 32UL)))
+ STACK_TOP32 : STACK_TOP64)
#endif