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signal/x86: Remove task parameter from send_sigtrap

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The send_sigtrap function is always called with task == current.  Make
that explicit by removing the task parameter.

This also makes it clear that the x86 send_sigtrap passes current
into force_sig_fault.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2019-02-05 18:25:11 -06:00
parent f8eac9011b
commit 28d42ea14e
3 changed files with 6 additions and 6 deletions
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3
arch/x86/include/asm/ptrace.h
View file

@ -102,8 +102,7 @@ extern unsigned long profile_pc(struct pt_regs *regs);
extern unsigned long
convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
int error_code, int si_code);
extern void send_sigtrap(struct pt_regs *regs, int error_code, int si_code);
static inline unsigned long regs_return_value(struct pt_regs *regs)

7
arch/x86/kernel/ptrace.c
View file

@ -1360,9 +1360,10 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
#endif
}
void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
int error_code, int si_code)
void send_sigtrap(struct pt_regs *regs, int error_code, int si_code)
{
struct task_struct *tsk = current;
tsk->thread.trap_nr = X86_TRAP_DB;
tsk->thread.error_code = error_code;
@ -1373,5 +1374,5 @@ void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
void user_single_step_report(struct pt_regs *regs)
{
send_sigtrap(current, regs, 0, TRAP_BRKPT);
send_sigtrap(regs, 0, TRAP_BRKPT);
}

2
arch/x86/kernel/traps.c
View file

@ -805,7 +805,7 @@ dotraplinkage void do_debug(struct pt_regs *regs, long error_code)
}
si_code = get_si_code(tsk->thread.debugreg6);
if (tsk->thread.debugreg6 & (DR_STEP | DR_TRAP_BITS) || user_icebp)
send_sigtrap(tsk, regs, error_code, si_code);
send_sigtrap(regs, error_code, si_code);
cond_local_irq_disable(regs);
debug_stack_usage_dec();