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softmmu: Check watchpoints for read+write at once

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Atomic operations are read-modify-write, and we'd like to
be able to test both read and write with one call.  This is
easy enough, with BP_MEM_READ | BP_MEM_WRITE.

Add BP_HIT_SHIFT to make it easy to set BP_WATCHPOINT_HIT_*.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-02-22 22:16:51 -10:00
parent 0953674ed0
commit 019a98083a
2 changed files with 14 additions and 12 deletions
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7
include/hw/core/cpu.h
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@ -923,9 +923,10 @@ void cpu_single_step(CPUState *cpu, int enabled);
#define BP_GDB 0x10
#define BP_CPU 0x20
#define BP_ANY (BP_GDB | BP_CPU)
#define BP_WATCHPOINT_HIT_READ 0x40
#define BP_WATCHPOINT_HIT_WRITE 0x80
#define BP_WATCHPOINT_HIT (BP_WATCHPOINT_HIT_READ | BP_WATCHPOINT_HIT_WRITE)
#define BP_HIT_SHIFT 6
#define BP_WATCHPOINT_HIT_READ (BP_MEM_READ << BP_HIT_SHIFT)
#define BP_WATCHPOINT_HIT_WRITE (BP_MEM_WRITE << BP_HIT_SHIFT)
#define BP_WATCHPOINT_HIT (BP_MEM_ACCESS << BP_HIT_SHIFT)
int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags,
CPUBreakpoint **breakpoint);