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-rw-r--r--arch/m68k/include/asm/ptrace.h17
-rw-r--r--arch/m68k/include/asm/thread_info_mm.h5
-rw-r--r--arch/m68k/kernel/entry.S6
-rw-r--r--arch/m68k/kernel/process.c5
-rw-r--r--arch/m68k/kernel/ptrace.c112
-rw-r--r--arch/m68k/kernel/vmlinux-std.lds61
-rw-r--r--arch/m68k/kernel/vmlinux-sun3.lds54
-rw-r--r--arch/m68knommu/kernel/ptrace.c18
8 files changed, 108 insertions, 170 deletions
diff --git a/arch/m68k/include/asm/ptrace.h b/arch/m68k/include/asm/ptrace.h
index 8c9194b9854..a6ab663bcc2 100644
--- a/arch/m68k/include/asm/ptrace.h
+++ b/arch/m68k/include/asm/ptrace.h
@@ -71,6 +71,8 @@ struct switch_stack {
#define PTRACE_GETFPREGS 14
#define PTRACE_SETFPREGS 15
+#define PTRACE_SINGLEBLOCK 33 /* resume execution until next branch */
+
#ifdef __KERNEL__
#ifndef PS_S
@@ -82,6 +84,21 @@ struct switch_stack {
#define instruction_pointer(regs) ((regs)->pc)
#define profile_pc(regs) instruction_pointer(regs)
extern void show_regs(struct pt_regs *);
+
+/*
+ * These are defined as per linux/ptrace.h, which see.
+ */
+struct task_struct;
+
+#define arch_has_single_step() (1)
+extern void user_enable_single_step(struct task_struct *);
+extern void user_disable_single_step(struct task_struct *);
+
+#ifdef CONFIG_MMU
+#define arch_has_block_step() (1)
+extern void user_enable_block_step(struct task_struct *);
+#endif
+
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
#endif /* _M68K_PTRACE_H */
diff --git a/arch/m68k/include/asm/thread_info_mm.h b/arch/m68k/include/asm/thread_info_mm.h
index b6da3882be9..167e518db41 100644
--- a/arch/m68k/include/asm/thread_info_mm.h
+++ b/arch/m68k/include/asm/thread_info_mm.h
@@ -4,10 +4,12 @@
#ifndef ASM_OFFSETS_C
#include <asm/asm-offsets.h>
#endif
-#include <asm/current.h>
#include <asm/types.h>
#include <asm/page.h>
+#ifndef __ASSEMBLY__
+#include <asm/current.h>
+
struct thread_info {
struct task_struct *task; /* main task structure */
unsigned long flags;
@@ -16,6 +18,7 @@ struct thread_info {
__u32 cpu; /* should always be 0 on m68k */
struct restart_block restart_block;
};
+#endif /* __ASSEMBLY__ */
#define PREEMPT_ACTIVE 0x4000000
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S
index c5b33634c98..77fc7c16bf4 100644
--- a/arch/m68k/kernel/entry.S
+++ b/arch/m68k/kernel/entry.S
@@ -179,7 +179,11 @@ do_signal_return:
addql #8,%sp
RESTORE_SWITCH_STACK
addql #4,%sp
- jbra resume_userspace
+ tstl %d0
+ jeq resume_userspace
+ | when single stepping into handler stop at the first insn
+ btst #6,%curptr@(TASK_INFO+TINFO_FLAGS+2)
+ jeq resume_userspace
do_delayed_trace:
bclr #7,%sp@(PT_OFF_SR) | clear trace bit in SR
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index 41230c595a8..05296593e71 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -317,15 +317,12 @@ asmlinkage int sys_execve(char __user *name, char __user * __user *argv, char __
char * filename;
struct pt_regs *regs = (struct pt_regs *) &name;
- lock_kernel();
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
- goto out;
+ return error;
error = do_execve(filename, argv, envp, regs);
putname(filename);
-out:
- unlock_kernel();
return error;
}
diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index 2075543c2d9..1fc217e5f06 100644
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -35,7 +35,9 @@
#define SR_MASK 0x001f
/* sets the trace bits. */
-#define TRACE_BITS 0x8000
+#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)
@@ -44,7 +46,7 @@
/* 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 int regoff[] = {
+static const int regoff[] = {
[0] = PT_REG(d1),
[1] = PT_REG(d2),
[2] = PT_REG(d3),
@@ -79,6 +81,14 @@ static inline long get_reg(struct task_struct *task, int regno)
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;
}
@@ -96,6 +106,16 @@ static inline int put_reg(struct task_struct *task, int regno,
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;
}
@@ -105,7 +125,7 @@ static inline int put_reg(struct task_struct *task, int regno,
*/
static inline void singlestep_disable(struct task_struct *child)
{
- unsigned long tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
+ unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
put_reg(child, PT_SR, tmp);
clear_tsk_thread_flag(child, TIF_DELAYED_TRACE);
}
@@ -118,18 +138,30 @@ 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);
+}
+
+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);
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+ singlestep_disable(child);
+}
+
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
unsigned long tmp;
int i, ret = 0;
switch (request) {
- /* when I and D space are separate, these will need to be fixed. */
- case PTRACE_PEEKTEXT: /* read word at location addr. */
- case PTRACE_PEEKDATA:
- ret = generic_ptrace_peekdata(child, addr, data);
- break;
-
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR:
if (addr & 3)
@@ -138,8 +170,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
if (addr >= 0 && addr < 19) {
tmp = get_reg(child, addr);
- if (addr == PT_SR)
- tmp >>= 16;
} else if (addr >= 21 && addr < 49) {
tmp = child->thread.fp[addr - 21];
/* Convert internal fpu reg representation
@@ -149,16 +179,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
tmp = ((tmp & 0xffff0000) << 15) |
((tmp & 0x0000ffff) << 16);
} else
- break;
+ goto out_eio;
ret = put_user(tmp, (unsigned long *)data);
break;
- /* when I and D space are separate, this will have to be fixed. */
- case PTRACE_POKETEXT: /* write the word at location addr. */
- case PTRACE_POKEDATA:
- ret = generic_ptrace_pokedata(child, addr, data);
- break;
-
case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
if (addr & 3)
goto out_eio;
@@ -166,9 +190,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
if (addr == PT_SR) {
data &= SR_MASK;
- data <<= 16;
- data |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
- } else if (addr >= 0 && addr < 19) {
+ data |= get_reg(child, PT_SR) & ~SR_MASK;
+ }
+ if (addr >= 0 && addr < 19) {
if (put_reg(child, addr, data))
goto out_eio;
} else if (addr >= 21 && addr < 48) {
@@ -185,52 +209,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
goto out_eio;
break;
- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: /* restart after signal. */
- if (!valid_signal(data))
- goto out_eio;
-
- if (request == PTRACE_SYSCALL)
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- child->exit_code = data;
- singlestep_disable(child);
- wake_up_process(child);
- break;
-
- /*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
- case PTRACE_KILL:
- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
- break;
- child->exit_code = SIGKILL;
- singlestep_disable(child);
- wake_up_process(child);
- break;
-
- case PTRACE_SINGLESTEP: /* set the trap flag. */
- if (!valid_signal(data))
- goto out_eio;
-
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- tmp = get_reg(child, PT_SR) | (TRACE_BITS << 16);
- put_reg(child, PT_SR, tmp);
- set_tsk_thread_flag(child, TIF_DELAYED_TRACE);
-
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- break;
-
case PTRACE_GETREGS: /* Get all gp regs from the child. */
for (i = 0; i < 19; i++) {
tmp = get_reg(child, i);
- if (i == PT_SR)
- tmp >>= 16;
ret = put_user(tmp, (unsigned long *)data);
if (ret)
break;
@@ -245,8 +226,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
if (i == PT_SR) {
tmp &= SR_MASK;
- tmp <<= 16;
- tmp |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
+ tmp |= get_reg(child, PT_SR) & ~SR_MASK;
}
put_reg(child, i, tmp);
data += sizeof(long);
diff --git a/arch/m68k/kernel/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds
index 47eac19e8f6..878be5f38ca 100644
--- a/arch/m68k/kernel/vmlinux-std.lds
+++ b/arch/m68k/kernel/vmlinux-std.lds
@@ -2,6 +2,7 @@
#include <asm-generic/vmlinux.lds.h>
#include <asm/page.h>
+#include <asm/thread_info.h>
OUTPUT_FORMAT("elf32-m68k", "elf32-m68k", "elf32-m68k")
OUTPUT_ARCH(m68k)
@@ -22,73 +23,37 @@ SECTIONS
_etext = .; /* End of text section */
- . = ALIGN(16); /* Exception table */
- __start___ex_table = .;
- __ex_table : { *(__ex_table) }
- __stop___ex_table = .;
+ EXCEPTION_TABLE(16)
RODATA
- .data : { /* Data */
- DATA_DATA
- CONSTRUCTORS
- }
+ RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE)
- . = ALIGN(16);
- .data.cacheline_aligned : { *(.data.cacheline_aligned) }
-
- .bss : { *(.bss) } /* BSS */
+ BSS_SECTION(0, 0, 0)
_edata = .; /* End of data section */
/* will be freed after init */
. = ALIGN(PAGE_SIZE); /* Init code and data */
__init_begin = .;
- .init.text : {
- _sinittext = .;
- INIT_TEXT
- _einittext = .;
- } :data
- .init.data : { INIT_DATA }
- . = ALIGN(16);
- __setup_start = .;
- .init.setup : { *(.init.setup) }
- __setup_end = .;
- __initcall_start = .;
- .initcall.init : {
- INITCALLS
- }
- __initcall_end = .;
- __con_initcall_start = .;
- .con_initcall.init : { *(.con_initcall.init) }
- __con_initcall_end = .;
+ INIT_TEXT_SECTION(PAGE_SIZE) :data
+ INIT_DATA_SECTION(16)
.m68k_fixup : {
__start_fixup = .;
*(.m68k_fixup)
__stop_fixup = .;
}
- SECURITY_INIT
-#ifdef CONFIG_BLK_DEV_INITRD
- . = ALIGN(8192);
- __initramfs_start = .;
- .init.ramfs : { *(.init.ramfs) }
- __initramfs_end = .;
-#endif
NOTES
- . = ALIGN(8192);
- __init_end = .;
-
- .data.init_task : { *(.data.init_task) } /* The initial task and kernel stack */
+ .init_end : {
+ /* This ALIGN be in a section so that _end is at the end of the
+ load segment. */
+ . = ALIGN(PAGE_SIZE);
+ __init_end = .;
+ }
_end = . ;
- /* Stabs debugging sections. */
- .stab 0 : { *(.stab) }
- .stabstr 0 : { *(.stabstr) }
- .stab.excl 0 : { *(.stab.excl) }
- .stab.exclstr 0 : { *(.stab.exclstr) }
- .stab.index 0 : { *(.stab.index) }
- .stab.indexstr 0 : { *(.stab.indexstr) }
+ STABS_DEBUG
.comment 0 : { *(.comment) }
/* Sections to be discarded */
diff --git a/arch/m68k/kernel/vmlinux-sun3.lds b/arch/m68k/kernel/vmlinux-sun3.lds
index 03efaf04d7d..1ad6b7ad2c1 100644
--- a/arch/m68k/kernel/vmlinux-sun3.lds
+++ b/arch/m68k/kernel/vmlinux-sun3.lds
@@ -2,6 +2,7 @@
#include <asm-generic/vmlinux.lds.h>
#include <asm/page.h>
+#include <asm/thread_info.h>
OUTPUT_FORMAT("elf32-m68k", "elf32-m68k", "elf32-m68k")
OUTPUT_ARCH(m68k)
@@ -23,14 +24,8 @@ SECTIONS
_etext = .; /* End of text section */
- .data : { /* Data */
- DATA_DATA
- CONSTRUCTORS
- . = ALIGN(16); /* Exception table */
- __start___ex_table = .;
- *(__ex_table)
- __stop___ex_table = .;
- } :data
+ EXCEPTION_TABLE(16) :data
+ RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE) :data
/* End of data goes *here* so that freeing init code works properly. */
_edata = .;
NOTES
@@ -38,56 +33,21 @@ SECTIONS
/* will be freed after init */
. = ALIGN(PAGE_SIZE); /* Init code and data */
__init_begin = .;
- .init.text : {
- _sinittext = .;
- INIT_TEXT
- _einittext = .;
- }
- .init.data : { INIT_DATA }
- . = ALIGN(16);
- __setup_start = .;
- .init.setup : { *(.init.setup) }
- __setup_end = .;
- __initcall_start = .;
- .initcall.init : {
- INITCALLS
- }
- __initcall_end = .;
- __con_initcall_start = .;
- .con_initcall.init : { *(.con_initcall.init) }
- __con_initcall_end = .;
+ INIT_TEXT_SECTION(PAGE_SIZE)
+ INIT_DATA_SECTION(16)
.m68k_fixup : {
__start_fixup = .;
*(.m68k_fixup)
__stop_fixup = .;
}
- SECURITY_INIT
-#ifdef CONFIG_BLK_DEV_INITRD
- . = ALIGN(PAGE_SIZE);
- __initramfs_start = .;
- .init.ramfs : { *(.init.ramfs) }
- __initramfs_end = .;
-#endif
. = ALIGN(PAGE_SIZE);
__init_end = .;
- .data.init.task : { *(.data.init_task) }
-
- .bss : { *(.bss) } /* BSS */
+ BSS_SECTION(0, 0, 0)
_end = . ;
- .crap : {
- /* Stabs debugging sections. */
- *(.stab)
- *(.stabstr)
- *(.stab.excl)
- *(.stab.exclstr)
- *(.stab.index)
- *(.stab.indexstr)
- *(.comment)
- *(.note)
- }
+ STABS_DEBUG
/* Sections to be discarded */
DISCARDS
diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c
index ef70ca070ce..4d3828959fb 100644
--- a/arch/m68knommu/kernel/ptrace.c
+++ b/arch/m68knommu/kernel/ptrace.c
@@ -86,6 +86,20 @@ static inline int put_reg(struct task_struct *task, int regno,
return 0;
}
+void user_enable_single_step(struct task_struct *task)
+{
+ unsigned long srflags;
+ srflags = get_reg(task, PT_SR) | (TRACE_BITS << 16);
+ put_reg(task, PT_SR, srflags);
+}
+
+void user_disable_single_step(struct task_struct *task)
+{
+ unsigned long srflags;
+ srflags = get_reg(task, PT_SR) & ~(TRACE_BITS << 16);
+ put_reg(task, PT_SR, srflags);
+}
+
/*
* Called by kernel/ptrace.c when detaching..
*
@@ -93,10 +107,8 @@ static inline int put_reg(struct task_struct *task, int regno,
*/
void ptrace_disable(struct task_struct *child)
{
- unsigned long tmp;
/* make sure the single step bit is not set. */
- tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
- put_reg(child, PT_SR, tmp);
+ user_disable_single_step(child);
}
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-18 11:53:53 +0000