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Refactor translation block CPU state handling (Jan Kiszka)

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This patch refactors the way the CPU state is handled that is associated
with a TB. The basic motivation is to move more arch specific code out
of generic files. Specifically the long #ifdef clutter in tb_find_fast()
has to be overcome in order to avoid duplicating it for the gdb
watchpoint fixes (patch "Restore pc on watchpoint hits").

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5736 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2008-11-18 19:46:41 +00:00
parent 622ed3605b
commit 6b9175478e
11 changed files with 115 additions and 95 deletions
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56
exec.c
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@ -886,12 +886,19 @@ TranslationBlock *tb_gen_code(CPUState *env,
void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end,
int is_cpu_write_access)
{
int n, current_tb_modified, current_tb_not_found, current_flags;
TranslationBlock *tb, *tb_next, *saved_tb;
CPUState *env = cpu_single_env;
PageDesc *p;
TranslationBlock *tb, *tb_next, *current_tb, *saved_tb;
target_ulong tb_start, tb_end;
target_ulong current_pc, current_cs_base;
PageDesc *p;
int n;
#ifdef TARGET_HAS_PRECISE_SMC
int current_tb_not_found = is_cpu_write_access;
TranslationBlock *current_tb = NULL;
int current_tb_modified = 0;
target_ulong current_pc = 0;
target_ulong current_cs_base = 0;
int current_flags = 0;
#endif /* TARGET_HAS_PRECISE_SMC */
p = page_find(start >> TARGET_PAGE_BITS);
if (!p)
@ -905,12 +912,6 @@ void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t
/* we remove all the TBs in the range [start, end[ */
/* XXX: see if in some cases it could be faster to invalidate all the code */
current_tb_not_found = is_cpu_write_access;
current_tb_modified = 0;
current_tb = NULL; /* avoid warning */
current_pc = 0; /* avoid warning */
current_cs_base = 0; /* avoid warning */
current_flags = 0; /* avoid warning */
tb = p->first_tb;
while (tb != NULL) {
n = (long)tb & 3;
@ -947,14 +948,8 @@ void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t
current_tb_modified = 1;
cpu_restore_state(current_tb, env,
env->mem_io_pc, NULL);
#if defined(TARGET_I386)
current_flags = env->hflags;
current_flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK));
current_cs_base = (target_ulong)env->segs[R_CS].base;
current_pc = current_cs_base + env->eip;
#else
#error unsupported CPU
#endif
cpu_get_tb_cpu_state(env, &current_pc, &current_cs_base,
&current_flags);
}
#endif /* TARGET_HAS_PRECISE_SMC */
/* we need to do that to handle the case where a signal
@ -1027,12 +1022,16 @@ static inline void tb_invalidate_phys_page_fast(target_phys_addr_t start, int le
static void tb_invalidate_phys_page(target_phys_addr_t addr,
unsigned long pc, void *puc)
{
int n, current_flags, current_tb_modified;
target_ulong current_pc, current_cs_base;
TranslationBlock *tb;
PageDesc *p;
TranslationBlock *tb, *current_tb;
int n;
#ifdef TARGET_HAS_PRECISE_SMC
TranslationBlock *current_tb = NULL;
CPUState *env = cpu_single_env;
int current_tb_modified = 0;
target_ulong current_pc = 0;
target_ulong current_cs_base = 0;
int current_flags = 0;
#endif
addr &= TARGET_PAGE_MASK;
@ -1040,11 +1039,6 @@ static void tb_invalidate_phys_page(target_phys_addr_t addr,
if (!p)
return;
tb = p->first_tb;
current_tb_modified = 0;
current_tb = NULL;
current_pc = 0; /* avoid warning */
current_cs_base = 0; /* avoid warning */
current_flags = 0; /* avoid warning */
#ifdef TARGET_HAS_PRECISE_SMC
if (tb && pc != 0) {
current_tb = tb_find_pc(pc);
@ -1064,14 +1058,8 @@ static void tb_invalidate_phys_page(target_phys_addr_t addr,
current_tb_modified = 1;
cpu_restore_state(current_tb, env, pc, puc);
#if defined(TARGET_I386)
current_flags = env->hflags;
current_flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK));
current_cs_base = (target_ulong)env->segs[R_CS].base;
current_pc = current_cs_base + env->eip;
#else
#error unsupported CPU
#endif
cpu_get_tb_cpu_state(env, &current_pc, &current_cs_base,
&current_flags);
}
#endif /* TARGET_HAS_PRECISE_SMC */
tb_phys_invalidate(tb, addr);