system/qemu
system/qemu
1
0
Fork 0
mirror of https://gitlab.com/qemu-project/qemu synced 2024-11-05 20:35:44 +00:00
Code Issues Projects Releases Packages Wiki Activity

w64: Fix data type of tb_next and other variables used for host addresses

Browse source 
QEMU host addresses must use uintptr_t to be portable for hosts with
an unusual size of long (w64).

tb_jmp_offset is an uint16_t value, therefore the local variable offset
in function tb_set_jmp_target was changed from unsigned long to uint16_t.

The type cast to long in function tb_add_jump now also uses uintptr_t.
For the bit operation used here, the signedness of the type cast does
not matter.

Some remaining unsigned long values are either only used for ARM assembler
code or will be fixed in a later patch for PPC.

v2:
Fix signature of tb_find_pc in exec.c, too (hint from Blue Swirl, thanks).
There remain lots of other long / unsigned long in exec.c which must be
replaced by uintptr_t. This will be done in a separate patch. Here
only one of these type casts is fixed.

v3:
Also fix signature of page_unprotect.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Stefan Weil 2012-04-06 22:26:15 +02:00 committed by Blue Swirl
parent 760e141613
commit 6375e09e79
3 changed files with 22 additions and 23 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
exec-all.h
View file

@ -85,7 +85,7 @@ void cpu_gen_init(void);
int cpu_gen_code(CPUArchState *env, struct TranslationBlock *tb,
int *gen_code_size_ptr);
int cpu_restore_state(struct TranslationBlock *tb,
CPUArchState *env, unsigned long searched_pc);
CPUArchState *env, uintptr_t searched_pc);
void cpu_resume_from_signal(CPUArchState *env1, void *puc);
void cpu_io_recompile(CPUArchState *env, void *retaddr);
TranslationBlock *tb_gen_code(CPUArchState *env,
@ -93,7 +93,7 @@ TranslationBlock *tb_gen_code(CPUArchState *env,
int cflags);
void cpu_exec_init(CPUArchState *env);
void QEMU_NORETURN cpu_loop_exit(CPUArchState *env1);
int page_unprotect(target_ulong address, unsigned long pc, void *puc);
int page_unprotect(target_ulong address, uintptr_t pc, void *puc);
void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
int is_cpu_write_access);
void tlb_flush_page(CPUArchState *env, target_ulong addr);
@ -150,7 +150,7 @@ struct TranslationBlock {
#ifdef USE_DIRECT_JUMP
uint16_t tb_jmp_offset[2]; /* offset of jump instruction */
#else
unsigned long tb_next[2]; /* address of jump generated code */
uintptr_t tb_next[2]; /* address of jump generated code */
#endif
/* list of TBs jumping to this one. This is a circular list using
the two least significant bits of the pointers to tell what is
@ -202,14 +202,14 @@ static inline void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr)
void ppc_tb_set_jmp_target(unsigned long jmp_addr, unsigned long addr);
#define tb_set_jmp_target1 ppc_tb_set_jmp_target
#elif defined(__i386__) || defined(__x86_64__)
static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
static inline void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr)
{
/* patch the branch destination */
*(uint32_t *)jmp_addr = addr - (jmp_addr + 4);
/* no need to flush icache explicitly */
}
#elif defined(__arm__)
static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
static inline void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr)
{
#if !QEMU_GNUC_PREREQ(4, 1)
register unsigned long _beg __asm ("a1");
@ -237,19 +237,17 @@ static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr
#endif
static inline void tb_set_jmp_target(TranslationBlock *tb,
int n, unsigned long addr)
int n, uintptr_t addr)
{
unsigned long offset;
offset = tb->tb_jmp_offset[n];
tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
uint16_t offset = tb->tb_jmp_offset[n];
tb_set_jmp_target1((uintptr_t)(tb->tc_ptr + offset), addr);
}
#else
/* set the jump target */
static inline void tb_set_jmp_target(TranslationBlock *tb,
int n, unsigned long addr)
int n, uintptr_t addr)
{
tb->tb_next[n] = addr;
}
@ -262,15 +260,15 @@ static inline void tb_add_jump(TranslationBlock *tb, int n,
/* NOTE: this test is only needed for thread safety */
if (!tb->jmp_next[n]) {
/* patch the native jump address */
tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr);
tb_set_jmp_target(tb, n, (uintptr_t)tb_next->tc_ptr);
/* add in TB jmp circular list */
tb->jmp_next[n] = tb_next->jmp_first;
tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
tb_next->jmp_first = (TranslationBlock *)((uintptr_t)(tb) | (n));
}
}
TranslationBlock *tb_find_pc(unsigned long pc_ptr);
TranslationBlock *tb_find_pc(uintptr_t pc_ptr);
#include "qemu-lock.h"
@ -288,13 +286,14 @@ extern void *tci_tb_ptr;
# define GETPC() tci_tb_ptr
# endif
#elif defined(__s390__) && !defined(__s390x__)
# define GETPC() ((void*)(((unsigned long)__builtin_return_address(0) & 0x7fffffffUL) - 1))
# define GETPC() \
((void *)(((uintptr_t)__builtin_return_address(0) & 0x7fffffffUL) - 1))
#elif defined(__arm__)
/* Thumb return addresses have the low bit set, so we need to subtract two.
This is still safe in ARM mode because instructions are 4 bytes. */
# define GETPC() ((void *)((unsigned long)__builtin_return_address(0) - 2))
# define GETPC() ((void *)((uintptr_t)__builtin_return_address(0) - 2))
#else
# define GETPC() ((void *)((unsigned long)__builtin_return_address(0) - 1))
# define GETPC() ((void *)((uintptr_t)__builtin_return_address(0) - 1))
#endif
#if !defined(CONFIG_USER_ONLY)

6
exec.c
View file

@ -1380,7 +1380,7 @@ void tb_link_page(TranslationBlock *tb,
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
tb[1].tc_ptr. Return NULL if not found */
TranslationBlock *tb_find_pc(unsigned long tc_ptr)
TranslationBlock *tb_find_pc(uintptr_t tc_ptr)
{
int m_min, m_max, m;
unsigned long v;
@ -2502,7 +2502,7 @@ int page_check_range(target_ulong start, target_ulong len, int flags)
/* called from signal handler: invalidate the code and unprotect the
page. Return TRUE if the fault was successfully handled. */
int page_unprotect(target_ulong address, unsigned long pc, void *puc)
int page_unprotect(target_ulong address, uintptr_t pc, void *puc)
{
unsigned int prot;
PageDesc *p;
@ -4484,7 +4484,7 @@ void cpu_io_recompile(CPUArchState *env, void *retaddr)
target_ulong pc, cs_base;
uint64_t flags;
tb = tb_find_pc((unsigned long)retaddr);
tb = tb_find_pc((uintptr_t)retaddr);
if (!tb) {
cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p",
retaddr);

6
translate-all.c
View file

@ -109,11 +109,11 @@ int cpu_gen_code(CPUArchState *env, TranslationBlock *tb, int *gen_code_size_ptr
/* The cpu state corresponding to 'searched_pc' is restored.
*/
int cpu_restore_state(TranslationBlock *tb,
CPUArchState *env, unsigned long searched_pc)
CPUArchState *env, uintptr_t searched_pc)
{
TCGContext *s = &tcg_ctx;
int j;
unsigned long tc_ptr;
uintptr_t tc_ptr;
#ifdef CONFIG_PROFILER
int64_t ti;
#endif
@ -133,7 +133,7 @@ int cpu_restore_state(TranslationBlock *tb,
}
/* find opc index corresponding to search_pc */
tc_ptr = (unsigned long)tb->tc_ptr;
tc_ptr = (uintptr_t)tb->tc_ptr;
if (searched_pc < tc_ptr)
return -1;