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cputlb: Pass retaddr to tb_check_watchpoint

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Fixes the previous TLB_WATCHPOINT patches because we are currently
failing to set cpu->mem_io_pc with the call to cpu_check_watchpoint.
Pass down the retaddr directly because it's readily available.

Fixes: 50b107c5d6
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-09-21 20:24:12 -07:00
parent 5a7c27bb8a
commit ae57db63ac
3 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
accel/tcg/translate-all.c
View File

@ -2142,16 +2142,16 @@ static bool tb_invalidate_phys_page(tb_page_addr_t addr, uintptr_t pc)
#endif
/* user-mode: call with mmap_lock held */
void tb_check_watchpoint(CPUState *cpu)
void tb_check_watchpoint(CPUState *cpu, uintptr_t retaddr)
{
TranslationBlock *tb;
assert_memory_lock();
tb = tcg_tb_lookup(cpu->mem_io_pc);
tb = tcg_tb_lookup(retaddr);
if (tb) {
/* We can use retranslation to find the PC. */
cpu_restore_state_from_tb(cpu, tb, cpu->mem_io_pc, true);
cpu_restore_state_from_tb(cpu, tb, retaddr, true);
tb_phys_invalidate(tb, -1);
} else {
/* The exception probably happened in a helper. The CPU state should

2
accel/tcg/translate-all.h
View File

@ -30,7 +30,7 @@ void tb_invalidate_phys_page_fast(struct page_collection *pages,
tb_page_addr_t start, int len,
uintptr_t retaddr);
void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end);
void tb_check_watchpoint(CPUState *cpu);
void tb_check_watchpoint(CPUState *cpu, uintptr_t retaddr);
#ifdef CONFIG_USER_ONLY
int page_unprotect(target_ulong address, uintptr_t pc);

2
exec.c
View File

@ -2758,7 +2758,7 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
cpu->watchpoint_hit = wp;
mmap_lock();
tb_check_watchpoint(cpu);
tb_check_watchpoint(cpu, ra);
if (wp->flags & BP_STOP_BEFORE_ACCESS) {
cpu->exception_index = EXCP_DEBUG;
mmap_unlock();