mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-13 05:54:23 +08:00
2d2da475ac
. correctly set up ZERO_PAGE pointer . drop ISA_DMA_API support . fix comment typos . fixes for undefined symbols . remove unused code and variables . elf-fdpic loader support for m68k -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEmsfM6tQwfNjBOxr3TiQVqaG9L4AFAmKURewACgkQTiQVqaG9 L4BMZQ/+NkDZREfDz8mvWfZfuBbsc2+jEm1MpEZkj0JuHbJxoewOzUqBvI8ya/jD Q9pz1WQzDe2X0kU60vwH1AmdoJZ7ZuK/44JCKaxSlUVFuvOGwtOfbaAb51RkhLhh P6ds2w32X/DgGIUgrvUwkRytG80lFrnw0YHPOFokfLsfZYdVSOsPsbEDZG1g0mWR yD4kKuUoChUa5RxmlhJNWByTyXgJQQB0qaMr04ovx8gRHGIDNjW0kBq1fBS6i2ua 6ZD00PkgWpDiEpiBkcpr80CDnjEv1Aaz79lltkS+lsAkey0EVEFiZN9GhHuejYgf 703E1vXgRmB8iYc2IVR+KhGquqVH4aKny1MxVCOPrRmchhq094x/t3hmfsyOSlVk MVngtJ8SQCNYE8tMNVC8CuZWn14vpHZzg9cLiMAxh+WWOTxgZgAr+6iIUWcd1q+Q z/qILRIZbva5Le3gq03+vRzW+BDsqgIsq0Py4q3xvOo+TG99C2LCZSoV+mwaod6G g3ive8SmacwJLM7VrEYbElykFxasN02K+DZDuvq4M2/CP5FsZb7fbAJA4L7y/1B8 /LH2LQA4uwxnRME4KRCY2MDcRYz5O/1q9U3eE4MzbsvMWCCFYyyp7XGDTL3HCtWM QyhwvTYfX9YkgqZHCt97mdyBBWfADVcgnGGtWFIziFaLczU3zpg= =O3zh -----END PGP SIGNATURE----- Merge tag 'm68knommu-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu updates from Greg Ungerer: "A collection of changes to add elf-fdpic loader support for m68k. Also a collection of various fixes. They include typo corrections, undefined symbol compilation fixes, removal of the ISA_DMA_API support and removal of unused code. Summary: - correctly set up ZERO_PAGE pointer - drop ISA_DMA_API support - fix comment typos - fixes for undefined symbols - remove unused code and variables - elf-fdpic loader support for m68k" * tag 'm68knommu-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68knommu: fix 68000 CPU link with no platform selected m68k: removed unused "mach_get_ss" m68knommu: fix undefined reference to `mach_get_rtc_pll' m68knommu: fix undefined reference to `_init_sp' m68knommu: allow elf_fdpic loader to be selected m68knommu: add definitions to support elf_fdpic program loader m68knommu: implement minimal regset support m68knommu: use asm-generic/mmu.h for nommu setups m68k: fix typos in comments m68k: coldfire: drop ISA_DMA_API support m68knommu: set ZERO_PAGE() to the allocated zeroed page
345 lines
8.3 KiB
C
345 lines
8.3 KiB
C
/*
|
|
* linux/arch/m68k/kernel/ptrace.c
|
|
*
|
|
* Copyright (C) 1994 by Hamish Macdonald
|
|
* Taken from linux/kernel/ptrace.c and modified for M680x0.
|
|
* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/sched/task_stack.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/user.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/regset.h>
|
|
#include <linux/elf.h>
|
|
|
|
#include <linux/uaccess.h>
|
|
#include <asm/page.h>
|
|
#include <asm/processor.h>
|
|
|
|
/*
|
|
* does not yet catch signals sent when the child dies.
|
|
* in exit.c or in signal.c.
|
|
*/
|
|
|
|
/* determines which bits in the SR the user has access to. */
|
|
/* 1 = access 0 = no access */
|
|
#define SR_MASK 0x001f
|
|
|
|
/* sets the trace bits. */
|
|
#define TRACE_BITS 0xC000
|
|
#define T1_BIT 0x8000
|
|
#define T0_BIT 0x4000
|
|
|
|
/* Find the stack offset for a register, relative to thread.esp0. */
|
|
#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg)
|
|
#define SW_REG(reg) ((long)&((struct switch_stack *)0)->reg \
|
|
- sizeof(struct switch_stack))
|
|
/* Mapping from PT_xxx to the stack offset at which the register is
|
|
saved. Notice that usp has no stack-slot and needs to be treated
|
|
specially (see get_reg/put_reg below). */
|
|
static const int regoff[] = {
|
|
[0] = PT_REG(d1),
|
|
[1] = PT_REG(d2),
|
|
[2] = PT_REG(d3),
|
|
[3] = PT_REG(d4),
|
|
[4] = PT_REG(d5),
|
|
[5] = SW_REG(d6),
|
|
[6] = SW_REG(d7),
|
|
[7] = PT_REG(a0),
|
|
[8] = PT_REG(a1),
|
|
[9] = PT_REG(a2),
|
|
[10] = SW_REG(a3),
|
|
[11] = SW_REG(a4),
|
|
[12] = SW_REG(a5),
|
|
[13] = SW_REG(a6),
|
|
[14] = PT_REG(d0),
|
|
[15] = -1,
|
|
[16] = PT_REG(orig_d0),
|
|
[17] = PT_REG(sr),
|
|
[18] = PT_REG(pc),
|
|
};
|
|
|
|
/*
|
|
* Get contents of register REGNO in task TASK.
|
|
*/
|
|
static inline long get_reg(struct task_struct *task, int regno)
|
|
{
|
|
unsigned long *addr;
|
|
|
|
if (regno == PT_USP)
|
|
addr = &task->thread.usp;
|
|
else if (regno < ARRAY_SIZE(regoff))
|
|
addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
|
|
else
|
|
return 0;
|
|
/* Need to take stkadj into account. */
|
|
if (regno == PT_SR || regno == PT_PC) {
|
|
long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
|
|
addr = (unsigned long *) ((unsigned long)addr + stkadj);
|
|
/* The sr is actually a 16 bit register. */
|
|
if (regno == PT_SR)
|
|
return *(unsigned short *)addr;
|
|
}
|
|
return *addr;
|
|
}
|
|
|
|
/*
|
|
* Write contents of register REGNO in task TASK.
|
|
*/
|
|
static inline int put_reg(struct task_struct *task, int regno,
|
|
unsigned long data)
|
|
{
|
|
unsigned long *addr;
|
|
|
|
if (regno == PT_USP)
|
|
addr = &task->thread.usp;
|
|
else if (regno < ARRAY_SIZE(regoff))
|
|
addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
|
|
else
|
|
return -1;
|
|
/* Need to take stkadj into account. */
|
|
if (regno == PT_SR || regno == PT_PC) {
|
|
long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
|
|
addr = (unsigned long *) ((unsigned long)addr + stkadj);
|
|
/* The sr is actually a 16 bit register. */
|
|
if (regno == PT_SR) {
|
|
*(unsigned short *)addr = data;
|
|
return 0;
|
|
}
|
|
}
|
|
*addr = data;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Make sure the single step bit is not set.
|
|
*/
|
|
static inline void singlestep_disable(struct task_struct *child)
|
|
{
|
|
unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
|
|
put_reg(child, PT_SR, tmp);
|
|
clear_tsk_thread_flag(child, TIF_DELAYED_TRACE);
|
|
}
|
|
|
|
/*
|
|
* Called by kernel/ptrace.c when detaching..
|
|
*/
|
|
void ptrace_disable(struct task_struct *child)
|
|
{
|
|
singlestep_disable(child);
|
|
}
|
|
|
|
void user_enable_single_step(struct task_struct *child)
|
|
{
|
|
unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
|
|
put_reg(child, PT_SR, tmp | T1_BIT);
|
|
set_tsk_thread_flag(child, TIF_DELAYED_TRACE);
|
|
}
|
|
|
|
#ifdef CONFIG_MMU
|
|
void user_enable_block_step(struct task_struct *child)
|
|
{
|
|
unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
|
|
put_reg(child, PT_SR, tmp | T0_BIT);
|
|
}
|
|
#endif
|
|
|
|
void user_disable_single_step(struct task_struct *child)
|
|
{
|
|
singlestep_disable(child);
|
|
}
|
|
|
|
long arch_ptrace(struct task_struct *child, long request,
|
|
unsigned long addr, unsigned long data)
|
|
{
|
|
unsigned long tmp;
|
|
int i, ret = 0;
|
|
int regno = addr >> 2; /* temporary hack. */
|
|
unsigned long __user *datap = (unsigned long __user *) data;
|
|
|
|
switch (request) {
|
|
/* read the word at location addr in the USER area. */
|
|
case PTRACE_PEEKUSR:
|
|
if (addr & 3)
|
|
goto out_eio;
|
|
|
|
if (regno >= 0 && regno < 19) {
|
|
tmp = get_reg(child, regno);
|
|
} else if (regno >= 21 && regno < 49) {
|
|
tmp = child->thread.fp[regno - 21];
|
|
/* Convert internal fpu reg representation
|
|
* into long double format
|
|
*/
|
|
if (FPU_IS_EMU && (regno < 45) && !(regno % 3))
|
|
tmp = ((tmp & 0xffff0000) << 15) |
|
|
((tmp & 0x0000ffff) << 16);
|
|
#ifndef CONFIG_MMU
|
|
} else if (regno == 49) {
|
|
tmp = child->mm->start_code;
|
|
} else if (regno == 50) {
|
|
tmp = child->mm->start_data;
|
|
} else if (regno == 51) {
|
|
tmp = child->mm->end_code;
|
|
#endif
|
|
} else
|
|
goto out_eio;
|
|
ret = put_user(tmp, datap);
|
|
break;
|
|
|
|
case PTRACE_POKEUSR:
|
|
/* write the word at location addr in the USER area */
|
|
if (addr & 3)
|
|
goto out_eio;
|
|
|
|
if (regno == PT_SR) {
|
|
data &= SR_MASK;
|
|
data |= get_reg(child, PT_SR) & ~SR_MASK;
|
|
}
|
|
if (regno >= 0 && regno < 19) {
|
|
if (put_reg(child, regno, data))
|
|
goto out_eio;
|
|
} else if (regno >= 21 && regno < 48) {
|
|
/* Convert long double format
|
|
* into internal fpu reg representation
|
|
*/
|
|
if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) {
|
|
data <<= 15;
|
|
data = (data & 0xffff0000) |
|
|
((data & 0x0000ffff) >> 1);
|
|
}
|
|
child->thread.fp[regno - 21] = data;
|
|
} else
|
|
goto out_eio;
|
|
break;
|
|
|
|
case PTRACE_GETREGS: /* Get all gp regs from the child. */
|
|
for (i = 0; i < 19; i++) {
|
|
tmp = get_reg(child, i);
|
|
ret = put_user(tmp, datap);
|
|
if (ret)
|
|
break;
|
|
datap++;
|
|
}
|
|
break;
|
|
|
|
case PTRACE_SETREGS: /* Set all gp regs in the child. */
|
|
for (i = 0; i < 19; i++) {
|
|
ret = get_user(tmp, datap);
|
|
if (ret)
|
|
break;
|
|
if (i == PT_SR) {
|
|
tmp &= SR_MASK;
|
|
tmp |= get_reg(child, PT_SR) & ~SR_MASK;
|
|
}
|
|
put_reg(child, i, tmp);
|
|
datap++;
|
|
}
|
|
break;
|
|
|
|
case PTRACE_GETFPREGS: /* Get the child FPU state. */
|
|
if (copy_to_user(datap, &child->thread.fp,
|
|
sizeof(struct user_m68kfp_struct)))
|
|
ret = -EFAULT;
|
|
break;
|
|
|
|
case PTRACE_SETFPREGS: /* Set the child FPU state. */
|
|
if (copy_from_user(&child->thread.fp, datap,
|
|
sizeof(struct user_m68kfp_struct)))
|
|
ret = -EFAULT;
|
|
break;
|
|
|
|
case PTRACE_GET_THREAD_AREA:
|
|
ret = put_user(task_thread_info(child)->tp_value, datap);
|
|
break;
|
|
|
|
default:
|
|
ret = ptrace_request(child, request, addr, data);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
out_eio:
|
|
return -EIO;
|
|
}
|
|
|
|
asmlinkage int syscall_trace_enter(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (test_thread_flag(TIF_SYSCALL_TRACE))
|
|
ret = ptrace_report_syscall_entry(task_pt_regs(current));
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage void syscall_trace_leave(void)
|
|
{
|
|
if (test_thread_flag(TIF_SYSCALL_TRACE))
|
|
ptrace_report_syscall_exit(task_pt_regs(current), 0);
|
|
}
|
|
|
|
#if defined(CONFIG_BINFMT_ELF_FDPIC) && defined(CONFIG_ELF_CORE)
|
|
/*
|
|
* Currently the only thing that needs to use regsets for m68k is the
|
|
* coredump support of the elf_fdpic loader. Implement the minimum
|
|
* definitions required for that.
|
|
*/
|
|
static int m68k_regset_get(struct task_struct *target,
|
|
const struct user_regset *regset,
|
|
struct membuf to)
|
|
{
|
|
struct pt_regs *ptregs = task_pt_regs(target);
|
|
u32 uregs[ELF_NGREG];
|
|
|
|
ELF_CORE_COPY_REGS(uregs, ptregs);
|
|
return membuf_write(&to, uregs, sizeof(uregs));
|
|
}
|
|
|
|
enum m68k_regset {
|
|
REGSET_GPR,
|
|
#ifdef CONFIG_FPU
|
|
REGSET_FPU,
|
|
#endif
|
|
};
|
|
|
|
static const struct user_regset m68k_user_regsets[] = {
|
|
[REGSET_GPR] = {
|
|
.core_note_type = NT_PRSTATUS,
|
|
.n = ELF_NGREG,
|
|
.size = sizeof(u32),
|
|
.align = sizeof(u16),
|
|
.regset_get = m68k_regset_get,
|
|
},
|
|
#ifdef CONFIG_FPU
|
|
[REGSET_FPU] = {
|
|
.core_note_type = NT_PRFPREG,
|
|
.n = sizeof(struct user_m68kfp_struct) / sizeof(u32),
|
|
.size = sizeof(u32),
|
|
.align = sizeof(u32),
|
|
}
|
|
#endif /* CONFIG_FPU */
|
|
};
|
|
|
|
static const struct user_regset_view user_m68k_view = {
|
|
.name = "m68k",
|
|
.e_machine = EM_68K,
|
|
.ei_osabi = ELF_OSABI,
|
|
.regsets = m68k_user_regsets,
|
|
.n = ARRAY_SIZE(m68k_user_regsets)
|
|
};
|
|
|
|
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
|
|
{
|
|
return &user_m68k_view;
|
|
}
|
|
#endif /* CONFIG_BINFMT_ELF_FDPIC && CONFIG_ELF_CORE */
|