ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 04:33:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

signal/alpha: si_trapno is only used with SIGFPE and SIGTRAP TRAP_UNK

Browse Source 
While reviewing the signal handlers on alpha it became clear that
si_trapno is only set to a non-zero value when sending SIGFPE and when
sending SITGRAP with si_code TRAP_UNK.

Add send_sig_fault_trapno and send SIGTRAP TRAP_UNK, and SIGFPE with it.

Remove the define of __ARCH_SI_TRAPNO and remove the always zero
si_trapno parameter from send_sig_fault and force_sig_fault.

v1: https://lkml.kernel.org/r/m1eeers7q7.fsf_-_@fess.ebiederm.org
v2: https://lkml.kernel.org/r/20210505141101.11519-7-ebiederm@xmission.com
Link: https://lkml.kernel.org/r/87h7gvxx7l.fsf_-_@disp2133
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2021-05-28 14:15:51 -05:00
parent 2c9f7eaf08
commit 7de5f68d49
7 changed files with 41 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
arch/alpha/kernel/traps.c
View File

@@ -227,7 +227,7 @@ do_entArith(unsigned long summary, unsigned long write_mask,
}
die_if_kernel("Arithmetic fault", regs, 0, NULL);
send_sig_fault(SIGFPE, si_code, (void __user *) regs->pc, 0, current);
send_sig_fault_trapno(SIGFPE, si_code, (void __user *) regs->pc, 0, current);
}
asmlinkage void
@@ -268,13 +268,13 @@ do_entIF(unsigned long type, struct pt_regs *regs)
regs->pc -= 4; /* make pc point to former bpt */
}
send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc, 0,
send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc,
current);
return;
case 1: /* bugcheck */
send_sig_fault(SIGTRAP, TRAP_UNK, (void __user *) regs->pc, 0,
current);
send_sig_fault_trapno(SIGTRAP, TRAP_UNK,
(void __user *) regs->pc, 0, current);
return;
case 2: /* gentrap */
@@ -335,8 +335,8 @@ do_entIF(unsigned long type, struct pt_regs *regs)
break;
}
send_sig_fault(signo, code, (void __user *) regs->pc, regs->r16,
current);
send_sig_fault_trapno(signo, code, (void __user *) regs->pc,
regs->r16, current);
return;
case 4: /* opDEC */
@@ -360,9 +360,9 @@ do_entIF(unsigned long type, struct pt_regs *regs)
if (si_code == 0)
return;
if (si_code > 0) {
send_sig_fault(SIGFPE, si_code,
(void __user *) regs->pc, 0,
current);
send_sig_fault_trapno(SIGFPE, si_code,
(void __user *) regs->pc,
0, current);
return;
}
}
@@ -387,7 +387,7 @@ do_entIF(unsigned long type, struct pt_regs *regs)
;
}
send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, 0, current);
send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, current);
}
/* There is an ifdef in the PALcode in MILO that enables a
@@ -402,7 +402,7 @@ do_entDbg(struct pt_regs *regs)
{
die_if_kernel("Instruction fault", regs, 0, NULL);
force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, 0);
force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc);
}
@@ -964,12 +964,12 @@ give_sigsegv:
si_code = SEGV_MAPERR;
mmap_read_unlock(mm);
}
send_sig_fault(SIGSEGV, si_code, va, 0, current);
send_sig_fault(SIGSEGV, si_code, va, current);
return;
give_sigbus:
regs->pc -= 4;
send_sig_fault(SIGBUS, BUS_ADRALN, va, 0, current);
send_sig_fault(SIGBUS, BUS_ADRALN, va, current);
return;
}