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| author | Martin Pärtel <martin.partel@gmail.com> | 2012-08-02 00:49:17 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2012-08-02 00:49:17 +0200 |
| commit | d3c1cfcdb43e023ab1b1c7a555cd9e929026500a (patch) | |
| tree | ad79f90d97a0316ae4058e4501e7b6ad54540ff4 /arch/um/kernel/trap.c | |
| parent | um: fix ubd_file_size for read-only files (diff) | |
| download | linux-d3c1cfcdb43e023ab1b1c7a555cd9e929026500a.tar.xz linux-d3c1cfcdb43e023ab1b1c7a555cd9e929026500a.zip | |
um: pass siginfo to guest process
UML guest processes now get correct siginfo_t for SIGTRAP, SIGFPE,
SIGILL and SIGBUS. Specifically, si_addr and si_code are now correct
where previously they were si_addr = NULL and si_code = 128.
Signed-off-by: Martin Pärtel <martin.partel@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/kernel/trap.c')
| -rw-r--r-- | arch/um/kernel/trap.c | 39 |
1 files changed, 32 insertions, 7 deletions
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 3be60765c0e2..0353b98ae35a 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -172,7 +172,7 @@ void fatal_sigsegv(void) os_dump_core(); } -void segv_handler(int sig, struct uml_pt_regs *regs) +void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) { struct faultinfo * fi = UPT_FAULTINFO(regs); @@ -258,8 +258,11 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, return 0; } -void relay_signal(int sig, struct uml_pt_regs *regs) +void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs) { + struct faultinfo *fi; + struct siginfo clean_si; + if (!UPT_IS_USER(regs)) { if (sig == SIGBUS) printk(KERN_ERR "Bus error - the host /dev/shm or /tmp " @@ -269,18 +272,40 @@ void relay_signal(int sig, struct uml_pt_regs *regs) arch_examine_signal(sig, regs); - current->thread.arch.faultinfo = *UPT_FAULTINFO(regs); - force_sig(sig, current); + memset(&clean_si, 0, sizeof(clean_si)); + clean_si.si_signo = si->si_signo; + clean_si.si_errno = si->si_errno; + clean_si.si_code = si->si_code; + switch (sig) { + case SIGILL: + case SIGFPE: + case SIGSEGV: + case SIGBUS: + case SIGTRAP: + fi = UPT_FAULTINFO(regs); + clean_si.si_addr = (void __user *) FAULT_ADDRESS(*fi); + current->thread.arch.faultinfo = *fi; +#ifdef __ARCH_SI_TRAPNO + clean_si.si_trapno = si->si_trapno; +#endif + break; + default: + printk(KERN_ERR "Attempted to relay unknown signal %d (si_code = %d)\n", + sig, si->si_code); + } + + force_sig_info(sig, &clean_si, current); } -void bus_handler(int sig, struct uml_pt_regs *regs) +void bus_handler(int sig, struct siginfo *si, struct uml_pt_regs *regs) { if (current->thread.fault_catcher != NULL) UML_LONGJMP(current->thread.fault_catcher, 1); - else relay_signal(sig, regs); + else + relay_signal(sig, si, regs); } -void winch(int sig, struct uml_pt_regs *regs) +void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) { do_IRQ(WINCH_IRQ, regs); } |