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target-arm: Implement handling of breakpoint firing

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Implement handling of breakpoint event firing to correctly
inject the debug exception into the guest.

Since the breakpoint and watchpoint control register format is
very similar we adjust wp_matches() to also handle breakpoints
as well rather than using a separate function.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1410523465-13400-3-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2014-09-29 18:48:46 +01:00
parent 46747d1508
commit 0eacea7060
2 changed files with 66 additions and 15 deletions
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6
target-arm/internals.h
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@ -313,6 +313,12 @@ static inline uint32_t syn_watchpoint(int same_el, int cm, int wnr)
| (cm << 8) | (wnr << 6) | 0x22;
}
static inline uint32_t syn_breakpoint(int same_el)
{
return (EC_BREAKPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| ARM_EL_IL | 0x22;
}
/* Update a QEMU watchpoint based on the information the guest has set in the
* DBGWCR<n>_EL1 and DBGWVR<n>_EL1 registers.
*/