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linux-user: fix 32bit g2h()/h2g()

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sparc32plus has 64bit long type but only 32bit virtual address space.

For instance, "apt-get upgrade" failed because of a mmap()/msync()
sequence.

mmap() returned 0xff252000 but msync() used g2h(0xffffffffff252000)
to find the host address. The "(target_ulong)" in g2h() doesn't fix the
address because it is 64bit long.

This patch introduces an "abi_ptr" that is set to uint32_t
if the virtual address space is addressed using 32bit in the linux-user
case. It stays set to target_ulong with softmmu case.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180814171217.14680-1-laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[lv: added "%" in TARGET_ABI_FMT_ptr "%"PRIx64]
This commit is contained in:
Laurent Vivier 2018-08-14 19:12:17 +02:00
parent b8dbfc9cc6
commit 3e23de1523
3 changed files with 25 additions and 12 deletions
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23
include/exec/cpu_ldst.h
View file

@ -48,8 +48,19 @@
#define CPU_LDST_H
#if defined(CONFIG_USER_ONLY)
/* sparc32plus has 64bit long but 32bit space address
* this can make bad result with g2h() and h2g()
*/
#if TARGET_VIRT_ADDR_SPACE_BITS <= 32
typedef uint32_t abi_ptr;
#define TARGET_ABI_FMT_ptr "%x"
#else
typedef uint64_t abi_ptr;
#define TARGET_ABI_FMT_ptr "%"PRIx64
#endif
/* All direct uses of g2h and h2g need to go away for usermode softmmu. */
#define g2h(x) ((void *)((unsigned long)(target_ulong)(x) + guest_base))
#define g2h(x) ((void *)((unsigned long)(abi_ptr)(x) + guest_base))
#define guest_addr_valid(x) ((x) <= GUEST_ADDR_MAX)
#define h2g_valid(x) guest_addr_valid((unsigned long)(x) - guest_base)
@ -61,7 +72,7 @@ static inline int guest_range_valid(unsigned long start, unsigned long len)
#define h2g_nocheck(x) ({ \
unsigned long __ret = (unsigned long)(x) - guest_base; \
(abi_ulong)__ret; \
(abi_ptr)__ret; \
})
#define h2g(x) ({ \
@ -69,7 +80,9 @@ static inline int guest_range_valid(unsigned long start, unsigned long len)
assert(h2g_valid(x)); \
h2g_nocheck(x); \
})
#else
typedef target_ulong abi_ptr;
#define TARGET_ABI_FMT_ptr TARGET_ABI_FMT_lx
#endif
#if defined(CONFIG_USER_ONLY)
@ -397,7 +410,7 @@ extern __thread uintptr_t helper_retaddr;
* This is the equivalent of the initial fast-path code used by
* TCG backends for guest load and store accesses.
*/
static inline void *tlb_vaddr_to_host(CPUArchState *env, target_ulong addr,
static inline void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
int access_type, int mmu_idx)
{
#if defined(CONFIG_USER_ONLY)
@ -405,7 +418,7 @@ static inline void *tlb_vaddr_to_host(CPUArchState *env, target_ulong addr,
#else
int index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
CPUTLBEntry *tlbentry = &env->tlb_table[mmu_idx][index];
target_ulong tlb_addr;
abi_ptr tlb_addr;
uintptr_t haddr;
switch (access_type) {