Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *    Copyright IBM Corp. 2000, 2006
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *               Gerhard Tonn (ton@de.ibm.com)                  
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  Copyright (C) 1991, 1992  Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *  1997-11-28  Modified for POSIX.1b signals by Richard Henderson
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/personality.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/binfmts.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <asm/ucontext.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <asm/lowcore.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <asm/switch_to.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include "compat_linux.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include "compat_ptrace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include "entry.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) typedef struct 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	__u8 callee_used_stack[__SIGNAL_FRAMESIZE32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct sigcontext32 sc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	_sigregs32 sregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	int signo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	_sigregs_ext32 sregs_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	__u16 svc_insn;		/* Offset of svc_insn is NOT fixed! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) } sigframe32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) typedef struct 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	__u8 callee_used_stack[__SIGNAL_FRAMESIZE32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	__u16 svc_insn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	compat_siginfo_t info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct ucontext32 uc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) } rt_sigframe32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) /* Store registers needed to create the signal frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) static void store_sigregs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	save_access_regs(current->thread.acrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) /* Load registers after signal return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) static void load_sigregs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	restore_access_regs(current->thread.acrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	_sigregs32 user_sregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	user_sregs.regs.psw.mask = (__u32)(regs->psw.mask >> 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	user_sregs.regs.psw.mask &= PSW32_MASK_USER | PSW32_MASK_RI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	user_sregs.regs.psw.mask |= PSW32_USER_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	user_sregs.regs.psw.addr = (__u32) regs->psw.addr |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		(__u32)(regs->psw.mask & PSW_MASK_BA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	for (i = 0; i < NUM_GPRS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		user_sregs.regs.gprs[i] = (__u32) regs->gprs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	memcpy(&user_sregs.regs.acrs, current->thread.acrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	       sizeof(user_sregs.regs.acrs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	fpregs_store((_s390_fp_regs *) &user_sregs.fpregs, &current->thread.fpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (__copy_to_user(sregs, &user_sregs, sizeof(_sigregs32)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	_sigregs32 user_sregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	/* Alwys make any pending restarted system call return -EINTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	current->restart_block.fn = do_no_restart_syscall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (__copy_from_user(&user_sregs, &sregs->regs, sizeof(user_sregs)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (!is_ri_task(current) && (user_sregs.regs.psw.mask & PSW32_MASK_RI))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	/* Test the floating-point-control word. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	if (test_fp_ctl(user_sregs.fpregs.fpc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	/* Use regs->psw.mask instead of PSW_USER_BITS to preserve PER bit. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	regs->psw.mask = (regs->psw.mask & ~(PSW_MASK_USER | PSW_MASK_RI)) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_USER) << 32 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_RI) << 32 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		(__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_AMODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	/* Check for invalid user address space control. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if ((regs->psw.mask & PSW_MASK_ASC) == PSW_ASC_HOME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		regs->psw.mask = PSW_ASC_PRIMARY |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			(regs->psw.mask & ~PSW_MASK_ASC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	regs->psw.addr = (__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_INSN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	for (i = 0; i < NUM_GPRS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		regs->gprs[i] = (__u64) user_sregs.regs.gprs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	memcpy(&current->thread.acrs, &user_sregs.regs.acrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	       sizeof(current->thread.acrs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	fpregs_load((_s390_fp_regs *) &user_sregs.fpregs, &current->thread.fpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static int save_sigregs_ext32(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			      _sigregs_ext32 __user *sregs_ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	__u32 gprs_high[NUM_GPRS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	__u64 vxrs[__NUM_VXRS_LOW];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	/* Save high gprs to signal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	for (i = 0; i < NUM_GPRS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		gprs_high[i] = regs->gprs[i] >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	if (__copy_to_user(&sregs_ext->gprs_high, &gprs_high,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			   sizeof(sregs_ext->gprs_high)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	/* Save vector registers to signal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	if (MACHINE_HAS_VX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		for (i = 0; i < __NUM_VXRS_LOW; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			vxrs[i] = *((__u64 *)(current->thread.fpu.vxrs + i) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		if (__copy_to_user(&sregs_ext->vxrs_low, vxrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 				   sizeof(sregs_ext->vxrs_low)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		    __copy_to_user(&sregs_ext->vxrs_high,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 				   current->thread.fpu.vxrs + __NUM_VXRS_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 				   sizeof(sregs_ext->vxrs_high)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static int restore_sigregs_ext32(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 				 _sigregs_ext32 __user *sregs_ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	__u32 gprs_high[NUM_GPRS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	__u64 vxrs[__NUM_VXRS_LOW];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	/* Restore high gprs from signal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (__copy_from_user(&gprs_high, &sregs_ext->gprs_high,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			     sizeof(sregs_ext->gprs_high)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	for (i = 0; i < NUM_GPRS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		*(__u32 *)&regs->gprs[i] = gprs_high[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	/* Restore vector registers from signal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (MACHINE_HAS_VX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		if (__copy_from_user(vxrs, &sregs_ext->vxrs_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 				     sizeof(sregs_ext->vxrs_low)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		    __copy_from_user(current->thread.fpu.vxrs + __NUM_VXRS_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				     &sregs_ext->vxrs_high,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 				     sizeof(sregs_ext->vxrs_high)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		for (i = 0; i < __NUM_VXRS_LOW; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			*((__u64 *)(current->thread.fpu.vxrs + i) + 1) = vxrs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) COMPAT_SYSCALL_DEFINE0(sigreturn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	struct pt_regs *regs = task_pt_regs(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	sigset_t set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	if (get_compat_sigset(&set, (compat_sigset_t __user *)frame->sc.oldmask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	set_current_blocked(&set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	if (restore_sigregs32(regs, &frame->sregs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (restore_sigregs_ext32(regs, &frame->sregs_ext))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	load_sigregs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return regs->gprs[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) badframe:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	force_sig(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) COMPAT_SYSCALL_DEFINE0(rt_sigreturn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	struct pt_regs *regs = task_pt_regs(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	sigset_t set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	if (get_compat_sigset(&set, &frame->uc.uc_sigmask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	set_current_blocked(&set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (compat_restore_altstack(&frame->uc.uc_stack))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	if (restore_sigregs_ext32(regs, &frame->uc.uc_mcontext_ext))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	load_sigregs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	return regs->gprs[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) badframe:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	force_sig(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)  * Set up a signal frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  * Determine which stack to use..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static inline void __user *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	unsigned long sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	/* Default to using normal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	sp = (unsigned long) A(regs->gprs[15]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	/* Overflow on alternate signal stack gives SIGSEGV. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	if (on_sig_stack(sp) && !on_sig_stack((sp - frame_size) & -8UL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		return (void __user *) -1UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	/* This is the X/Open sanctioned signal stack switching.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	if (ka->sa.sa_flags & SA_ONSTACK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		if (! sas_ss_flags(sp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			sp = current->sas_ss_sp + current->sas_ss_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	return (void __user *)((sp - frame_size) & -8ul);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static int setup_frame32(struct ksignal *ksig, sigset_t *set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 			 struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	int sig = ksig->sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	sigframe32 __user *frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	unsigned long restorer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	size_t frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	 * gprs_high are always present for 31-bit compat tasks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	 * The space for vector registers is only allocated if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	 * the machine supports it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	frame_size = sizeof(*frame) - sizeof(frame->sregs_ext.__reserved);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	if (!MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		frame_size -= sizeof(frame->sregs_ext.vxrs_low) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			      sizeof(frame->sregs_ext.vxrs_high);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	frame = get_sigframe(&ksig->ka, regs, frame_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	if (frame == (void __user *) -1UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	/* Set up backchain. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	if (__put_user(regs->gprs[15], (unsigned int __user *) frame))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	/* Create struct sigcontext32 on the signal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	if (put_compat_sigset((compat_sigset_t __user *)frame->sc.oldmask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 			      set, sizeof(compat_sigset_t)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (__put_user(ptr_to_compat(&frame->sregs), &frame->sc.sregs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	/* Store registers needed to create the signal frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	store_sigregs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	/* Create _sigregs32 on the signal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	if (save_sigregs32(regs, &frame->sregs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	/* Place signal number on stack to allow backtrace from handler.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	/* Create _sigregs_ext32 on the signal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	if (save_sigregs_ext32(regs, &frame->sregs_ext))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	/* Set up to return from userspace.  If provided, use a stub
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	   already in userspace.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		restorer = (unsigned long __force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 			ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		/* Signal frames without vectors registers are short ! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		__u16 __user *svc = (void __user *) frame + frame_size - 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, svc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		restorer = (unsigned long __force) svc | PSW32_ADDR_AMODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)         }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	/* Set up registers for signal handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	regs->gprs[14] = restorer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	regs->gprs[15] = (__force __u64) frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	/* Force 31 bit amode and default user address space control. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	regs->psw.mask = PSW_MASK_BA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		(PSW_USER_BITS & PSW_MASK_ASC) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		(regs->psw.mask & ~PSW_MASK_ASC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	regs->psw.addr = (__force __u64) ksig->ka.sa.sa_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	regs->gprs[2] = sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	regs->gprs[3] = (__force __u64) &frame->sc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	/* We forgot to include these in the sigcontext.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	   To avoid breaking binary compatibility, they are passed as args. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	    sig == SIGTRAP || sig == SIGFPE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		/* set extra registers only for synchronous signals */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		regs->gprs[4] = regs->int_code & 127;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		regs->gprs[5] = regs->int_parm_long;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 		regs->gprs[6] = current->thread.last_break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 			    struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	rt_sigframe32 __user *frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	unsigned long restorer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	size_t frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	u32 uc_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	frame_size = sizeof(*frame) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		     sizeof(frame->uc.uc_mcontext_ext.__reserved);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	 * gprs_high are always present for 31-bit compat tasks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	 * The space for vector registers is only allocated if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	 * the machine supports it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	uc_flags = UC_GPRS_HIGH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	if (MACHINE_HAS_VX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		uc_flags |= UC_VXRS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		frame_size -= sizeof(frame->uc.uc_mcontext_ext.vxrs_low) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 			      sizeof(frame->uc.uc_mcontext_ext.vxrs_high);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	frame = get_sigframe(&ksig->ka, regs, frame_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	if (frame == (void __user *) -1UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	/* Set up backchain. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	/* Set up to return from userspace.  If provided, use a stub
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	   already in userspace.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		restorer = (unsigned long __force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 			ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 		__u16 __user *svc = &frame->svc_insn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, svc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 		restorer = (unsigned long __force) svc | PSW32_ADDR_AMODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	/* Create siginfo on the signal stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	if (copy_siginfo_to_user32(&frame->info, &ksig->info))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	/* Store registers needed to create the signal frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	store_sigregs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	/* Create ucontext on the signal stack. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	if (__put_user(uc_flags, &frame->uc.uc_flags) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	    __put_user(0, &frame->uc.uc_link) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	    __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	    save_sigregs32(regs, &frame->uc.uc_mcontext) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	    put_compat_sigset(&frame->uc.uc_sigmask, set, sizeof(compat_sigset_t)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	    save_sigregs_ext32(regs, &frame->uc.uc_mcontext_ext))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	/* Set up registers for signal handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	regs->gprs[14] = restorer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	regs->gprs[15] = (__force __u64) frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	/* Force 31 bit amode and default user address space control. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	regs->psw.mask = PSW_MASK_BA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 		(PSW_USER_BITS & PSW_MASK_ASC) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 		(regs->psw.mask & ~PSW_MASK_ASC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	regs->psw.addr = (__u64 __force) ksig->ka.sa.sa_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	regs->gprs[2] = ksig->sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	regs->gprs[3] = (__force __u64) &frame->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	regs->gprs[4] = (__force __u64) &frame->uc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	regs->gprs[5] = current->thread.last_break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)  * OK, we're invoking a handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)  */	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) void handle_signal32(struct ksignal *ksig, sigset_t *oldset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 		     struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 	/* Set up the stack frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	if (ksig->ka.sa.sa_flags & SA_SIGINFO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		ret = setup_rt_frame32(ksig, oldset, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		ret = setup_frame32(ksig, oldset, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLE_STEP));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)