xemu-project/xemu
1
0
Fork 0
mirror of https://github.com/xemu-project/xemu.git synced 2024-11-27 21:40:49 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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) {

12
include/exec/cpu_ldst_useronly_template.h
View File

@ -62,7 +62,7 @@
#endif
static inline RES_TYPE
glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr)
{
#if !defined(CODE_ACCESS)
trace_guest_mem_before_exec(
@ -74,7 +74,7 @@ glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
static inline RES_TYPE
glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
target_ulong ptr,
abi_ptr ptr,
uintptr_t retaddr)
{
RES_TYPE ret;
@ -86,7 +86,7 @@ glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
#if DATA_SIZE <= 2
static inline int
glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr)
{
#if !defined(CODE_ACCESS)
trace_guest_mem_before_exec(
@ -98,7 +98,7 @@ glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
static inline int
glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
target_ulong ptr,
abi_ptr ptr,
uintptr_t retaddr)
{
int ret;
@ -111,7 +111,7 @@ glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
#ifndef CODE_ACCESS
static inline void
glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr,
glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, abi_ptr ptr,
RES_TYPE v)
{
#if !defined(CODE_ACCESS)
@ -124,7 +124,7 @@ glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr,
static inline void
glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
target_ulong ptr,
abi_ptr ptr,
RES_TYPE v,
uintptr_t retaddr)
{

2
linux-user/syscall.c
View File

@ -7644,7 +7644,7 @@ static int open_self_maps(void *cpu_env, int fd)
if (h2g(min) == ts->info->stack_limit) {
pstrcpy(path, sizeof(path), " [stack]");
}
dprintf(fd, TARGET_ABI_FMT_lx "-" TARGET_ABI_FMT_lx
dprintf(fd, TARGET_ABI_FMT_ptr "-" TARGET_ABI_FMT_ptr
" %c%c%c%c %08" PRIx64 " %02x:%02x %d %s%s\n",
h2g(min), h2g(max - 1) + 1, flag_r, flag_w,
flag_x, flag_p, offset, dev_maj, dev_min, inode,