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linux-pinenote/arch/mips/kernel/branch.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1996, 97, 2000, 2001 by Ralf Baechle
* Copyright (C) 2001 MIPS Technologies, Inc.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/signal.h>
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
#include <linux/module.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
#include <asm/branch.h>
#include <asm/cpu.h>
#include <asm/cpu-features.h>
__compute_return_epc() uses CFC1 instruction which might result in a coprocessor unusable exception since the process can lose its fpu context by preemption. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-09 13:16:07 +00:00
#include <asm/fpu.h>
MIPS: microMIPS: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:08:40 -05:00
#include <asm/fpu_emulator.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
#include <asm/inst.h>
#include <asm/ptrace.h>
#include <asm/uaccess.h>
MIPS: microMIPS: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:08:40 -05:00
/*
MIPS: MIPS16e: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in MIPS16e mode. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:45:19 -05:00
* Calculate and return exception PC in case of branch delay slot
* for microMIPS and MIPS16e. It does not clear the ISA mode bit.
MIPS: microMIPS: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:08:40 -05:00
*/
int __isa_exception_epc(struct pt_regs *regs)
{
unsigned short inst;
MIPS: MIPS16e: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in MIPS16e mode. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:45:19 -05:00
long epc = regs->cp0_epc;
MIPS: microMIPS: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:08:40 -05:00
/* Calculate exception PC in branch delay slot. */
if (__get_user(inst, (u16 __user *) msk_isa16_mode(epc))) {
/* This should never happen because delay slot was checked. */
force_sig(SIGSEGV, current);
return epc;
}
MIPS: MIPS16e: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in MIPS16e mode. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:45:19 -05:00
if (cpu_has_mips16) {
if (((union mips16e_instruction)inst).ri.opcode
== MIPS16e_jal_op)
epc += 4;
else
epc += 2;
} else if (mm_insn_16bit(inst))
MIPS: microMIPS: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:08:40 -05:00
epc += 2;
else
epc += 4;
return epc;
}
MIPS: Sort out mm_isBranchInstr. mm_isBranchInstr() did reside in the math emu code even though it logically is separate and also is used outside the math emu code. In addition GCC 4.9.0 leaves the following unnnecessarily bloated function body for a non-microMIPS configuration: <mm_isBranchInstr>: 105c: afa50004 sw a1,4(sp) 1060: afa60008 sw a2,8(sp) 1064: afa7000c sw a3,12(sp) 1068: 03e00008 jr ra 106c: 00001021 move v0,zero which stores arguments that are never going to be used on the stack frame. Move mm_isBranchInstr() from cp1emu.c to branch.c, then split mm_isBranchInstr() into a __mm_isBranchInstr() core and a mm_isBranchInstr() wrapper inline function which only invokes __mm_isBranchInstr() on microMIPS configurations. This shaves off 112 bytes off the kernel and improves code flow a bit. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-04-29 15:21:24 +02:00
/* (microMIPS) Convert 16-bit register encoding to 32-bit register encoding. */
static const unsigned int reg16to32map[8] = {16, 17, 2, 3, 4, 5, 6, 7};
int __mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
unsigned long *contpc)
{
union mips_instruction insn = (union mips_instruction)dec_insn.insn;
int bc_false = 0;
unsigned int fcr31;
unsigned int bit;
if (!cpu_has_mmips)
return 0;
switch (insn.mm_i_format.opcode) {
case mm_pool32a_op:
if ((insn.mm_i_format.simmediate & MM_POOL32A_MINOR_MASK) ==
mm_pool32axf_op) {
switch (insn.mm_i_format.simmediate >>
MM_POOL32A_MINOR_SHIFT) {
case mm_jalr_op:
case mm_jalrhb_op:
case mm_jalrs_op:
case mm_jalrshb_op:
if (insn.mm_i_format.rt != 0) /* Not mm_jr */
regs->regs[insn.mm_i_format.rt] =
regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
*contpc = regs->regs[insn.mm_i_format.rs];
return 1;
}
}
break;
case mm_pool32i_op:
switch (insn.mm_i_format.rt) {
case mm_bltzals_op:
case mm_bltzal_op:
regs->regs[31] = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
/* Fall through */
case mm_bltz_op:
if ((long)regs->regs[insn.mm_i_format.rs] < 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_i_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
case mm_bgezals_op:
case mm_bgezal_op:
regs->regs[31] = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
/* Fall through */
case mm_bgez_op:
if ((long)regs->regs[insn.mm_i_format.rs] >= 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_i_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
case mm_blez_op:
if ((long)regs->regs[insn.mm_i_format.rs] <= 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_i_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
case mm_bgtz_op:
if ((long)regs->regs[insn.mm_i_format.rs] <= 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_i_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
case mm_bc2f_op:
case mm_bc1f_op:
bc_false = 1;
/* Fall through */
case mm_bc2t_op:
case mm_bc1t_op:
preempt_disable();
if (is_fpu_owner())
MIPS: Fix build with binutils 2.24.51+ Starting with version 2.24.51.20140728 MIPS binutils complain loudly about mixing soft-float and hard-float object files, leading to this build failure since GCC is invoked with "-msoft-float" on MIPS: {standard input}: Warning: .gnu_attribute 4,3 requires `softfloat' LD arch/mips/alchemy/common/built-in.o mipsel-softfloat-linux-gnu-ld: Warning: arch/mips/alchemy/common/built-in.o uses -msoft-float (set by arch/mips/alchemy/common/prom.o), arch/mips/alchemy/common/sleeper.o uses -mhard-float To fix this, we detect if GAS is new enough to support "-msoft-float" command option, and if it does, we can let GCC pass it to GAS; but then we also need to sprinkle the files which make use of floating point registers with the necessary ".set hardfloat" directives. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Cc: Markos Chandras <Markos.Chandras@imgtec.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/8355/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-07 14:13:54 +01:00
fcr31 = read_32bit_cp1_register(CP1_STATUS);
MIPS: Sort out mm_isBranchInstr. mm_isBranchInstr() did reside in the math emu code even though it logically is separate and also is used outside the math emu code. In addition GCC 4.9.0 leaves the following unnnecessarily bloated function body for a non-microMIPS configuration: <mm_isBranchInstr>: 105c: afa50004 sw a1,4(sp) 1060: afa60008 sw a2,8(sp) 1064: afa7000c sw a3,12(sp) 1068: 03e00008 jr ra 106c: 00001021 move v0,zero which stores arguments that are never going to be used on the stack frame. Move mm_isBranchInstr() from cp1emu.c to branch.c, then split mm_isBranchInstr() into a __mm_isBranchInstr() core and a mm_isBranchInstr() wrapper inline function which only invokes __mm_isBranchInstr() on microMIPS configurations. This shaves off 112 bytes off the kernel and improves code flow a bit. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-04-29 15:21:24 +02:00
else
fcr31 = current->thread.fpu.fcr31;
preempt_enable();
if (bc_false)
fcr31 = ~fcr31;
bit = (insn.mm_i_format.rs >> 2);
bit += (bit != 0);
bit += 23;
if (fcr31 & (1 << bit))
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_i_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc + dec_insn.next_pc_inc;
return 1;
}
break;
case mm_pool16c_op:
switch (insn.mm_i_format.rt) {
case mm_jalr16_op:
case mm_jalrs16_op:
regs->regs[31] = regs->cp0_epc +
dec_insn.pc_inc + dec_insn.next_pc_inc;
/* Fall through */
case mm_jr16_op:
*contpc = regs->regs[insn.mm_i_format.rs];
return 1;
}
break;
case mm_beqz16_op:
if ((long)regs->regs[reg16to32map[insn.mm_b1_format.rs]] == 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_b1_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc + dec_insn.next_pc_inc;
return 1;
case mm_bnez16_op:
if ((long)regs->regs[reg16to32map[insn.mm_b1_format.rs]] != 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_b1_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc + dec_insn.next_pc_inc;
return 1;
case mm_b16_op:
*contpc = regs->cp0_epc + dec_insn.pc_inc +
(insn.mm_b0_format.simmediate << 1);
return 1;
case mm_beq32_op:
if (regs->regs[insn.mm_i_format.rs] ==
regs->regs[insn.mm_i_format.rt])
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_i_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
case mm_bne32_op:
if (regs->regs[insn.mm_i_format.rs] !=
regs->regs[insn.mm_i_format.rt])
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
(insn.mm_i_format.simmediate << 1);
else
*contpc = regs->cp0_epc +
dec_insn.pc_inc + dec_insn.next_pc_inc;
return 1;
case mm_jalx32_op:
regs->regs[31] = regs->cp0_epc +
dec_insn.pc_inc + dec_insn.next_pc_inc;
*contpc = regs->cp0_epc + dec_insn.pc_inc;
*contpc >>= 28;
*contpc <<= 28;
*contpc |= (insn.j_format.target << 2);
return 1;
case mm_jals32_op:
case mm_jal32_op:
regs->regs[31] = regs->cp0_epc +
dec_insn.pc_inc + dec_insn.next_pc_inc;
/* Fall through */
case mm_j32_op:
*contpc = regs->cp0_epc + dec_insn.pc_inc;
*contpc >>= 27;
*contpc <<= 27;
*contpc |= (insn.j_format.target << 1);
set_isa16_mode(*contpc);
return 1;
}
return 0;
}
MIPS: microMIPS: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:08:40 -05:00
/*
* Compute return address and emulate branch in microMIPS mode after an
* exception only. It does not handle compact branches/jumps and cannot
* be used in interrupt context. (Compact branches/jumps do not cause
* exceptions.)
*/
int __microMIPS_compute_return_epc(struct pt_regs *regs)
{
u16 __user *pc16;
u16 halfword;
unsigned int word;
unsigned long contpc;
struct mm_decoded_insn mminsn = { 0 };
mminsn.micro_mips_mode = 1;
/* This load never faults. */
pc16 = (unsigned short __user *)msk_isa16_mode(regs->cp0_epc);
__get_user(halfword, pc16);
pc16++;
contpc = regs->cp0_epc + 2;
word = ((unsigned int)halfword << 16);
mminsn.pc_inc = 2;
if (!mm_insn_16bit(halfword)) {
__get_user(halfword, pc16);
pc16++;
contpc = regs->cp0_epc + 4;
mminsn.pc_inc = 4;
word |= halfword;
}
mminsn.insn = word;
if (get_user(halfword, pc16))
goto sigsegv;
mminsn.next_pc_inc = 2;
word = ((unsigned int)halfword << 16);
if (!mm_insn_16bit(halfword)) {
pc16++;
if (get_user(halfword, pc16))
goto sigsegv;
mminsn.next_pc_inc = 4;
word |= halfword;
}
mminsn.next_insn = word;
mm_isBranchInstr(regs, mminsn, &contpc);
regs->cp0_epc = contpc;
return 0;
sigsegv:
force_sig(SIGSEGV, current);
return -EFAULT;
}
MIPS: MIPS16e: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in MIPS16e mode. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:45:19 -05:00
/*
* Compute return address and emulate branch in MIPS16e mode after an
* exception only. It does not handle compact branches/jumps and cannot
* be used in interrupt context. (Compact branches/jumps do not cause
* exceptions.)
*/
int __MIPS16e_compute_return_epc(struct pt_regs *regs)
{
u16 __user *addr;
union mips16e_instruction inst;
u16 inst2;
u32 fullinst;
long epc;
epc = regs->cp0_epc;
/* Read the instruction. */
addr = (u16 __user *)msk_isa16_mode(epc);
if (__get_user(inst.full, addr)) {
force_sig(SIGSEGV, current);
return -EFAULT;
}
switch (inst.ri.opcode) {
case MIPS16e_extend_op:
regs->cp0_epc += 4;
return 0;
/*
* JAL and JALX in MIPS16e mode
*/
case MIPS16e_jal_op:
addr += 1;
if (__get_user(inst2, addr)) {
force_sig(SIGSEGV, current);
return -EFAULT;
}
fullinst = ((unsigned)inst.full << 16) | inst2;
regs->regs[31] = epc + 6;
epc += 4;
epc >>= 28;
epc <<= 28;
/*
* JAL:5 X:1 TARGET[20-16]:5 TARGET[25:21]:5 TARGET[15:0]:16
*
* ......TARGET[15:0].................TARGET[20:16]...........
* ......TARGET[25:21]
*/
epc |=
((fullinst & 0xffff) << 2) | ((fullinst & 0x3e00000) >> 3) |
((fullinst & 0x1f0000) << 7);
if (!inst.jal.x)
set_isa16_mode(epc); /* Set ISA mode bit. */
regs->cp0_epc = epc;
return 0;
/*
* J(AL)R(C)
*/
case MIPS16e_rr_op:
if (inst.rr.func == MIPS16e_jr_func) {
if (inst.rr.ra)
regs->cp0_epc = regs->regs[31];
else
regs->cp0_epc =
regs->regs[reg16to32[inst.rr.rx]];
if (inst.rr.l) {
if (inst.rr.nd)
regs->regs[31] = epc + 2;
else
regs->regs[31] = epc + 4;
}
return 0;
}
break;
}
/*
* All other cases have no branch delay slot and are 16-bits.
* Branches do not cause an exception.
*/
regs->cp0_epc += 2;
return 0;
}
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
/**
* __compute_return_epc_for_insn - Computes the return address and do emulate
* branch simulation, if required.
*
* @regs: Pointer to pt_regs
* @insn: branch instruction to decode
* @returns: -EFAULT on error and forces SIGBUS, and on success
* returns 0 or BRANCH_LIKELY_TAKEN as appropriate after
* evaluating the branch.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
*/
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
int __compute_return_epc_for_insn(struct pt_regs *regs,
union mips_instruction insn)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
{
[MIPS] Add some __user tags Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-13 23:02:42 +09:00
unsigned int bit, fcr31, dspcontrol;
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
long epc = regs->cp0_epc;
int ret = 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
switch (insn.i_format.opcode) {
/*
* jr and jalr are in r_format format.
*/
case spec_op:
switch (insn.r_format.func) {
case jalr_op:
regs->regs[insn.r_format.rd] = epc + 8;
/* Fall through */
case jr_op:
regs->cp0_epc = regs->regs[insn.r_format.rs];
break;
}
break;
/*
* This group contains:
* bltz_op, bgez_op, bltzl_op, bgezl_op,
* bltzal_op, bgezal_op, bltzall_op, bgezall_op.
*/
case bcond_op:
switch (insn.i_format.rt) {
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 12:59:30 +01:00
case bltz_op:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
case bltzl_op:
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if ((long)regs->regs[insn.i_format.rs] < 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if (insn.i_format.rt == bltzl_op)
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
case bgez_op:
case bgezl_op:
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if ((long)regs->regs[insn.i_format.rs] >= 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if (insn.i_format.rt == bgezl_op)
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
case bltzal_op:
case bltzall_op:
regs->regs[31] = epc + 8;
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if ((long)regs->regs[insn.i_format.rs] < 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if (insn.i_format.rt == bltzall_op)
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
case bgezal_op:
case bgezall_op:
regs->regs[31] = epc + 8;
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if ((long)regs->regs[insn.i_format.rs] >= 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if (insn.i_format.rt == bgezall_op)
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
Support the MIPS32 / MIPS64 DSP ASE. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-31 11:49:19 +00:00
case bposge32_op:
if (!cpu_has_dsp)
goto sigill;
dspcontrol = rddsp(0x01);
if (dspcontrol >= 32) {
epc = epc + 4 + (insn.i_format.simmediate << 2);
} else
epc += 8;
regs->cp0_epc = epc;
break;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
}
break;
/*
* These are unconditional and in j_format.
*/
case jal_op:
regs->regs[31] = regs->cp0_epc + 8;
case j_op:
epc += 4;
epc >>= 28;
epc <<= 28;
epc |= (insn.j_format.target << 2);
regs->cp0_epc = epc;
MIPS: microMIPS: Support handling of delay slots. Add logic needed to properly calculate exceptions for delay slots when in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-03-25 13:08:40 -05:00
if (insn.i_format.opcode == jalx_op)
set_isa16_mode(regs->cp0_epc);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
break;
/*
* These are conditional and in i_format.
*/
case beq_op:
case beql_op:
if (regs->regs[insn.i_format.rs] ==
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
regs->regs[insn.i_format.rt]) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS: Fix branch emulation of branch likely instructions. Two issues: o For beql_op, beql_op, bne_op, bnel_op, blez_op, blezl_op, bgtz_op and bgtzl_op the wrong field was being checked for the instruction opcode. o For blez_op / blezl_op and bgtz_op / bgtzl_op the test was testing for the wrong opcode. This bug got introduced by d8d4e3ae0b5c179c0bfd3f0af5b352d13bea9cfa [MIPS Kprobes: Refactor branch emulation]. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Acked-by: Victor Kamensky <kamensky@cisco.com>
2014-05-22 23:19:00 +02:00
if (insn.i_format.opcode == beql_op)
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
case bne_op:
case bnel_op:
if (regs->regs[insn.i_format.rs] !=
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
regs->regs[insn.i_format.rt]) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS: Fix branch emulation of branch likely instructions. Two issues: o For beql_op, beql_op, bne_op, bnel_op, blez_op, blezl_op, bgtz_op and bgtzl_op the wrong field was being checked for the instruction opcode. o For blez_op / blezl_op and bgtz_op / bgtzl_op the test was testing for the wrong opcode. This bug got introduced by d8d4e3ae0b5c179c0bfd3f0af5b352d13bea9cfa [MIPS Kprobes: Refactor branch emulation]. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Acked-by: Victor Kamensky <kamensky@cisco.com>
2014-05-22 23:19:00 +02:00
if (insn.i_format.opcode == bnel_op)
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
case blez_op: /* not really i_format */
case blezl_op:
/* rt field assumed to be zero */
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if ((long)regs->regs[insn.i_format.rs] <= 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS: Fix branch emulation of branch likely instructions. Two issues: o For beql_op, beql_op, bne_op, bnel_op, blez_op, blezl_op, bgtz_op and bgtzl_op the wrong field was being checked for the instruction opcode. o For blez_op / blezl_op and bgtz_op / bgtzl_op the test was testing for the wrong opcode. This bug got introduced by d8d4e3ae0b5c179c0bfd3f0af5b352d13bea9cfa [MIPS Kprobes: Refactor branch emulation]. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Acked-by: Victor Kamensky <kamensky@cisco.com>
2014-05-22 23:19:00 +02:00
if (insn.i_format.opcode == blezl_op)
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
case bgtz_op:
case bgtzl_op:
/* rt field assumed to be zero */
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if ((long)regs->regs[insn.i_format.rs] > 0) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS: Fix branch emulation of branch likely instructions. Two issues: o For beql_op, beql_op, bne_op, bnel_op, blez_op, blezl_op, bgtz_op and bgtzl_op the wrong field was being checked for the instruction opcode. o For blez_op / blezl_op and bgtz_op / bgtzl_op the test was testing for the wrong opcode. This bug got introduced by d8d4e3ae0b5c179c0bfd3f0af5b352d13bea9cfa [MIPS Kprobes: Refactor branch emulation]. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Acked-by: Victor Kamensky <kamensky@cisco.com>
2014-05-22 23:19:00 +02:00
if (insn.i_format.opcode == bgtzl_op)
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
/*
* And now the FPA/cp1 branch instructions.
*/
case cop1_op:
__compute_return_epc() uses CFC1 instruction which might result in a coprocessor unusable exception since the process can lose its fpu context by preemption. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-09 13:16:07 +00:00
preempt_disable();
if (is_fpu_owner())
MIPS: Fix build with binutils 2.24.51+ Starting with version 2.24.51.20140728 MIPS binutils complain loudly about mixing soft-float and hard-float object files, leading to this build failure since GCC is invoked with "-msoft-float" on MIPS: {standard input}: Warning: .gnu_attribute 4,3 requires `softfloat' LD arch/mips/alchemy/common/built-in.o mipsel-softfloat-linux-gnu-ld: Warning: arch/mips/alchemy/common/built-in.o uses -msoft-float (set by arch/mips/alchemy/common/prom.o), arch/mips/alchemy/common/sleeper.o uses -mhard-float To fix this, we detect if GAS is new enough to support "-msoft-float" command option, and if it does, we can let GCC pass it to GAS; but then we also need to sprinkle the files which make use of floating point registers with the necessary ".set hardfloat" directives. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Cc: Markos Chandras <Markos.Chandras@imgtec.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/8355/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-07 14:13:54 +01:00
fcr31 = read_32bit_cp1_register(CP1_STATUS);
__compute_return_epc() uses CFC1 instruction which might result in a coprocessor unusable exception since the process can lose its fpu context by preemption. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-09 13:16:07 +00:00
else
[MIPS] Unify mips_fpu_soft_struct and mips_fpu_hard_structs. The struct mips_fpu_soft_struct and mips_fpu_hard_struct are completely same now and the kernel fpu emulator assumes that. This patch unifies them to mips_fpu_struct and get rid of mips_fpu_union. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-05-16 01:26:03 +09:00
fcr31 = current->thread.fpu.fcr31;
__compute_return_epc() uses CFC1 instruction which might result in a coprocessor unusable exception since the process can lose its fpu context by preemption. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-09 13:16:07 +00:00
preempt_enable();
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
bit = (insn.i_format.rt >> 2);
bit += (bit != 0);
bit += 23;
[MIPS] Fix branch emulation for floating-point exceptions. In the branch emulation for floating-point exceptions, __compute_return_epc must determine for bc1f et al which condition code bit to test. This is based on bits <4:2> of the rt field. The switch statement to distinguish bc1f et al needs to use only the two low bits of rt, but the old code tests on the whole rt field. This patch masks off the proper bits. Signed-off-by: Win Treese <treese@acm.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-26 21:33:03 +01:00
switch (insn.i_format.rt & 3) {
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 12:59:30 +01:00
case 0: /* bc1f */
case 2: /* bc1fl */
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if (~fcr31 & (1 << bit)) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if (insn.i_format.rt == 2)
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 12:59:30 +01:00
case 1: /* bc1t */
case 3: /* bc1tl */
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if (fcr31 & (1 << bit)) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc = epc + 4 + (insn.i_format.simmediate << 2);
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
if (insn.i_format.rt == 3)
ret = BRANCH_LIKELY_TAKEN;
} else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
epc += 8;
regs->cp0_epc = epc;
break;
}
break;
MIPS: Compute branch returns for Cavium OCTEON specific branch instructions. For Cavium OCTEON, compute the return epc value for OCTEON specific branch instructions. Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-12-11 15:33:34 -08:00
#ifdef CONFIG_CPU_CAVIUM_OCTEON
case lwc2_op: /* This is bbit0 on Octeon */
if ((regs->regs[insn.i_format.rs] & (1ull<<insn.i_format.rt))
== 0)
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
regs->cp0_epc = epc;
break;
case ldc2_op: /* This is bbit032 on Octeon */
if ((regs->regs[insn.i_format.rs] &
(1ull<<(insn.i_format.rt+32))) == 0)
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
regs->cp0_epc = epc;
break;
case swc2_op: /* This is bbit1 on Octeon */
if (regs->regs[insn.i_format.rs] & (1ull<<insn.i_format.rt))
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
regs->cp0_epc = epc;
break;
case sdc2_op: /* This is bbit132 on Octeon */
if (regs->regs[insn.i_format.rs] &
(1ull<<(insn.i_format.rt+32)))
epc = epc + 4 + (insn.i_format.simmediate << 2);
else
epc += 8;
regs->cp0_epc = epc;
break;
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
}
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
return ret;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
sigill:
printk("%s: DSP branch but not DSP ASE - sending SIGBUS.\n", current->comm);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
force_sig(SIGBUS, current);
return -EFAULT;
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
}
EXPORT_SYMBOL_GPL(__compute_return_epc_for_insn);
Support the MIPS32 / MIPS64 DSP ASE. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-31 11:49:19 +00:00
MIPS Kprobes: Refactor branch emulation This patch refactors MIPS branch emulation code so as to allow skipping delay slot instruction in case of branch likely instructions when branch is not taken. This is useful for keeping the code common for use cases like kprobes where one would like to handle the branch instructions keeping the delay slot instuction also in picture for branch likely instructions. Also allow emulation when instruction to be decoded is not at pt_regs->cp0_epc as in case of kprobes where pt_regs->cp0_epc points to the breakpoint instruction. The patch also exports the function for modules. Signed-off-by: Maneesh Soni <manesoni@cisco.com> Signed-off-by: Victor Kamensky <kamensky@cisco.com> Cc: David Daney <david.daney@cavium.com> Cc: ananth@in.ibm.com Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2913/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-11-08 17:07:11 +05:30
int __compute_return_epc(struct pt_regs *regs)
{
unsigned int __user *addr;
long epc;
union mips_instruction insn;
epc = regs->cp0_epc;
if (epc & 3)
goto unaligned;
/*
* Read the instruction
*/
addr = (unsigned int __user *) epc;
if (__get_user(insn.word, addr)) {
force_sig(SIGSEGV, current);
return -EFAULT;
}
return __compute_return_epc_for_insn(regs, insn);
unaligned:
printk("%s: unaligned epc - sending SIGBUS.\n", current->comm);
Support the MIPS32 / MIPS64 DSP ASE. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-31 11:49:19 +00:00
force_sig(SIGBUS, current);
return -EFAULT;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
}
Reference in a new issue Copy permalink