Implement set_sigtramp_args to setup the arguments to the sigtramp calls. Signed-off-by: Stacey Son <s...@freebsd.org> Signed-off-by: Warner Losh <i...@bsdimp.com> --- bsd-user/arm/target_arch_signal.h | 35 +++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/bsd-user/arm/target_arch_signal.h b/bsd-user/arm/target_arch_signal.h index 67355ff28f..b421c2522c 100644 --- a/bsd-user/arm/target_arch_signal.h +++ b/bsd-user/arm/target_arch_signal.h @@ -128,4 +128,39 @@ struct target_trapframe { abi_ulong tf_pc; }; +/* + * Compare to arm/arm/machdep.c sendsig() + * Assumes that target stack frame memory is locked. + */ +static inline abi_long +set_sigtramp_args(CPUARMState *regs, int sig, struct target_sigframe *frame, + abi_ulong frame_addr, struct target_sigaction *ka) +{ + /* + * Arguments to signal handler: + * r0 = signal number + * r1 = siginfo pointer + * r2 = ucontext pointer + * r5 = ucontext pointer + * pc = signal handler pointer + * sp = sigframe struct pointer + * lr = sigtramp at base of user stack + */ + + regs->regs[0] = sig; + regs->regs[1] = frame_addr + + offsetof(struct target_sigframe, sf_si); + regs->regs[2] = frame_addr + + offsetof(struct target_sigframe, sf_uc); + + /* the trampoline uses r5 as the uc address */ + regs->regs[5] = frame_addr + + offsetof(struct target_sigframe, sf_uc); + regs->regs[TARGET_REG_PC] = ka->_sa_handler; + regs->regs[TARGET_REG_SP] = frame_addr; + regs->regs[TARGET_REG_LR] = TARGET_PS_STRINGS - TARGET_SZSIGCODE; + + return 0; +} + #endif /* !_TARGET_ARCH_SIGNAL_H_ */ -- 2.32.0