diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2018-04-16 02:50:48 +0200 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-04-25 17:44:11 +0200 |
| commit | bc08c0781dbe5ec996bac1088f944723103729af (patch) | |
| tree | 12ff168344f89d72b61dd99851417c564c25c071 /arch/um/kernel/trap.c | |
| parent | signal/sparc: Use force_sig_fault where appropriate (diff) | |
| download | linux-bc08c0781dbe5ec996bac1088f944723103729af.tar.xz linux-bc08c0781dbe5ec996bac1088f944723103729af.zip | |
signal/um: Use force_sig_fault where appropriate
Filling in struct siginfo before calling force_sig_info a tedious and
error prone process, where once in a great while the wrong fields
are filled out, and siginfo has been inconsistently cleared.
Simplify this process by using the helper force_sig_fault. Which
takes as a parameters all of the information it needs, ensures
all of the fiddly bits of filling in struct siginfo are done properly
and then calls force_sig_info.
In short about a 5 line reduction in code for every time force_sig_info
is called, which makes the calling function clearer.
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: user-mode-linux-devel@lists.sourceforge.net
Cc: linux-um@lists.infradead.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/um/kernel/trap.c')
| -rw-r--r-- | arch/um/kernel/trap.c | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index d4d38520c4c6..d18be983814a 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -162,14 +162,9 @@ static void show_segv_info(struct uml_pt_regs *regs) static void bad_segv(struct faultinfo fi, unsigned long ip) { - struct siginfo si; - - clear_siginfo(&si); - si.si_signo = SIGSEGV; - si.si_code = SEGV_ACCERR; - si.si_addr = (void __user *) FAULT_ADDRESS(fi); current->thread.arch.faultinfo = fi; - force_sig_info(SIGSEGV, &si, current); + force_sig_fault(SIGSEGV, SEGV_ACCERR, (void __user *) FAULT_ADDRESS(fi), + current); } void fatal_sigsegv(void) @@ -215,13 +210,12 @@ void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, struct uml_pt_regs *regs) { - struct siginfo si; jmp_buf *catcher; + int si_code; int err; int is_write = FAULT_WRITE(fi); unsigned long address = FAULT_ADDRESS(fi); - clear_siginfo(&si); if (!is_user && regs) current->thread.segv_regs = container_of(regs, struct pt_regs, regs); @@ -241,7 +235,7 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, if (SEGV_IS_FIXABLE(&fi)) err = handle_page_fault(address, ip, is_write, is_user, - &si.si_code); + &si_code); else { err = -EFAULT; /* @@ -273,18 +267,14 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, show_segv_info(regs); if (err == -EACCES) { - si.si_signo = SIGBUS; - si.si_errno = 0; - si.si_code = BUS_ADRERR; - si.si_addr = (void __user *)address; current->thread.arch.faultinfo = fi; - force_sig_info(SIGBUS, &si, current); + force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address, + current); } else { BUG_ON(err != -EFAULT); - si.si_signo = SIGSEGV; - si.si_addr = (void __user *) address; current->thread.arch.faultinfo = fi; - force_sig_info(SIGSEGV, &si, current); + force_sig_fault(SIGSEGV, si_code, (void __user *) address, + current); } out: |