From a78b1299f1bbb9608e3e3a36a7f16cf700a2789d Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Tue, 28 Nov 2017 14:35:24 +0000 Subject: [PATCH] linux-user: Propagate siginfo_t through to handle_cpu_signal() Currently all the architecture/OS specific cpu_signal_handler() functions call handle_cpu_signal() without passing it the siginfo_t. We're going to want that so we can look at the si_code to determine whether this is a SEGV_ACCERR access violation or some other kind of fault, so change the functions to pass through the pointer to the siginfo_t rather than just the si_addr value. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson Message-Id: <1511879725-9576-2-git-send-email-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier --- accel/tcg/user-exec.c | 39 ++++++++++++++------------------------- 1 file changed, 14 insertions(+), 25 deletions(-) diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c index f42285ea1c..e8f26ff0cb 100644 --- a/accel/tcg/user-exec.c +++ b/accel/tcg/user-exec.c @@ -57,12 +57,13 @@ static void cpu_exit_tb_from_sighandler(CPUState *cpu, sigset_t *old_set) the effective address of the memory exception. 'is_write' is 1 if a write caused the exception and otherwise 0'. 'old_set' is the signal set which should be restored */ -static inline int handle_cpu_signal(uintptr_t pc, unsigned long address, +static inline int handle_cpu_signal(uintptr_t pc, siginfo_t *info, int is_write, sigset_t *old_set) { CPUState *cpu = current_cpu; CPUClass *cc; int ret; + unsigned long address = (unsigned long)info->si_addr; /* We must handle PC addresses from two different sources: * a call return address and a signal frame address. @@ -215,9 +216,8 @@ int cpu_signal_handler(int host_signum, void *pinfo, #endif pc = EIP_sig(uc); trapno = TRAP_sig(uc); - return handle_cpu_signal(pc, (unsigned long)info->si_addr, - trapno == 0xe ? - (ERROR_sig(uc) >> 1) & 1 : 0, + return handle_cpu_signal(pc, info, + trapno == 0xe ? (ERROR_sig(uc) >> 1) & 1 : 0, &MASK_sig(uc)); } @@ -261,9 +261,8 @@ int cpu_signal_handler(int host_signum, void *pinfo, #endif pc = PC_sig(uc); - return handle_cpu_signal(pc, (unsigned long)info->si_addr, - TRAP_sig(uc) == 0xe ? - (ERROR_sig(uc) >> 1) & 1 : 0, + return handle_cpu_signal(pc, info, + TRAP_sig(uc) == 0xe ? (ERROR_sig(uc) >> 1) & 1 : 0, &MASK_sig(uc)); } @@ -341,8 +340,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, is_write = 1; } #endif - return handle_cpu_signal(pc, (unsigned long)info->si_addr, - is_write, &uc->uc_sigmask); + return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); } #elif defined(__alpha__) @@ -372,8 +370,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, is_write = 1; } - return handle_cpu_signal(pc, (unsigned long)info->si_addr, - is_write, &uc->uc_sigmask); + return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); } #elif defined(__sparc__) @@ -432,8 +429,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, break; } } - return handle_cpu_signal(pc, (unsigned long)info->si_addr, - is_write, sigmask); + return handle_cpu_signal(pc, info, is_write, sigmask); } #elif defined(__arm__) @@ -466,9 +462,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, * later processor; on v5 we will always report this as a read). */ is_write = extract32(uc->uc_mcontext.error_code, 11, 1); - return handle_cpu_signal(pc, (unsigned long)info->si_addr, - is_write, - &uc->uc_sigmask); + return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); } #elif defined(__aarch64__) @@ -495,8 +489,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, void *puc) /* Ignore bits 23 & 24, controlling indexing. */ || (insn & 0x3a400000) == 0x28000000); /* C3.3.7,14-16 */ - return handle_cpu_signal(pc, (uintptr_t)info->si_addr, - is_write, &uc->uc_sigmask); + return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); } #elif defined(__ia64) @@ -529,9 +522,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, void *puc) default: break; } - return handle_cpu_signal(ip, (unsigned long)info->si_addr, - is_write, - (sigset_t *)&uc->uc_sigmask); + return handle_cpu_signal(ip, info, is_write, (sigset_t *)&uc->uc_sigmask); } #elif defined(__s390__) @@ -583,8 +574,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, } break; } - return handle_cpu_signal(pc, (unsigned long)info->si_addr, - is_write, &uc->uc_sigmask); + return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); } #elif defined(__mips__) @@ -599,8 +589,7 @@ int cpu_signal_handler(int host_signum, void *pinfo, /* XXX: compute is_write */ is_write = 0; - return handle_cpu_signal(pc, (unsigned long)info->si_addr, - is_write, &uc->uc_sigmask); + return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask); } #else