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accel/tcg: Split out handle_sigsegv_accerr_write

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This is the major portion of handle_cpu_signal which is specific
to tcg, handling the page protections for the translations.
Most of the rest will migrate to linux-user/ shortly.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Pass guest address to handle_sigsegv_accerr_write.
This commit is contained in:
Richard Henderson 2021-09-12 19:47:29 -07:00
parent f920ffdd8e
commit 5e38ba7dde
2 changed files with 72 additions and 41 deletions
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12
include/exec/exec-all.h
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@ -673,6 +673,18 @@ static inline tb_page_addr_t get_page_addr_code_hostp(CPUArchState *env,
*/
MMUAccessType adjust_signal_pc(uintptr_t *pc, bool is_write);
/**
* handle_sigsegv_accerr_write:
* @cpu: the cpu context
* @old_set: the sigset_t from the signal ucontext_t
* @host_pc: the host pc, adjusted for the signal
* @host_addr: the host address of the fault
*
* Return true if the write fault has been handled, and should be re-tried.
*/
bool handle_sigsegv_accerr_write(CPUState *cpu, sigset_t *old_set,
uintptr_t host_pc, abi_ptr guest_addr);
/**
* cpu_signal_handler
* @signum: host signal number