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target/i386: Implement x86_cpu_record_sigsegv

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Record cr2, error_code, and exception_index.  That last means
that we must exit to cpu_loop ourselves, instead of letting
exception_index being overwritten.

Use the maperr parameter to properly set PG_ERROR_P_MASK.

Reviewed by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-09-17 19:10:25 -07:00
parent 860e0b965b
commit f74bd157c6
3 changed files with 25 additions and 7 deletions
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6
target/i386/tcg/helper-tcg.h
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@ -43,9 +43,15 @@ bool x86_cpu_exec_interrupt(CPUState *cpu, int int_req);
#endif
/* helper.c */
#ifdef CONFIG_USER_ONLY
void x86_cpu_record_sigsegv(CPUState *cs, vaddr addr,
MMUAccessType access_type,
bool maperr, uintptr_t ra);
#else
bool x86_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
#endif
void breakpoint_handler(CPUState *cs);