2005-04-16 16:20:36 -06:00
|
|
|
/*
|
2005-10-19 17:11:29 -06:00
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* ptrace for 32-bit processes running on a 64-bit kernel.
|
2005-04-16 16:20:36 -06:00
|
|
|
*
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|
* PowerPC version
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|
|
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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|
|
* Derived from "arch/m68k/kernel/ptrace.c"
|
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|
|
* Copyright (C) 1994 by Hamish Macdonald
|
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|
|
* Taken from linux/kernel/ptrace.c and modified for M680x0.
|
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|
* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
|
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*
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|
* Modified by Cort Dougan (cort@hq.fsmlabs.com)
|
2005-10-19 17:11:29 -06:00
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|
* and Paul Mackerras (paulus@samba.org).
|
2005-04-16 16:20:36 -06:00
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|
*
|
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|
|
* This file is subject to the terms and conditions of the GNU General
|
2005-10-19 17:11:29 -06:00
|
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|
* Public License. See the file COPYING in the main directory of
|
2005-04-16 16:20:36 -06:00
|
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|
* this archive for more details.
|
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|
|
*/
|
|
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|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/mm.h>
|
|
|
|
#include <linux/smp.h>
|
|
|
|
#include <linux/smp_lock.h>
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|
|
#include <linux/errno.h>
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|
|
#include <linux/ptrace.h>
|
2007-12-20 04:59:04 -07:00
|
|
|
#include <linux/regset.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
#include <linux/user.h>
|
|
|
|
#include <linux/security.h>
|
2005-05-01 09:59:14 -06:00
|
|
|
#include <linux/signal.h>
|
2007-12-20 04:58:49 -07:00
|
|
|
#include <linux/compat.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
#include <asm/page.h>
|
|
|
|
#include <asm/pgtable.h>
|
|
|
|
#include <asm/system.h>
|
2005-11-19 02:47:22 -07:00
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|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* does not yet catch signals sent when the child dies.
|
|
|
|
* in exit.c or in signal.c.
|
|
|
|
*/
|
|
|
|
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
/*
|
|
|
|
* Here are the old "legacy" powerpc specific getregs/setregs ptrace calls,
|
|
|
|
* we mark them as obsolete now, they will be removed in a future version
|
|
|
|
*/
|
|
|
|
static long compat_ptrace_old(struct task_struct *child, long request,
|
|
|
|
long addr, long data)
|
|
|
|
{
|
2007-12-20 04:59:04 -07:00
|
|
|
switch (request) {
|
|
|
|
case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */
|
|
|
|
return copy_regset_to_user(child,
|
|
|
|
task_user_regset_view(current), 0,
|
|
|
|
0, 32 * sizeof(compat_long_t),
|
|
|
|
compat_ptr(data));
|
|
|
|
|
|
|
|
case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */
|
|
|
|
return copy_regset_from_user(child,
|
|
|
|
task_user_regset_view(current), 0,
|
|
|
|
0, 32 * sizeof(compat_long_t),
|
|
|
|
compat_ptr(data));
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
}
|
|
|
|
|
2007-12-20 04:59:04 -07:00
|
|
|
return -EPERM;
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
}
|
|
|
|
|
2007-12-20 04:58:55 -07:00
|
|
|
long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
|
|
|
|
compat_ulong_t caddr, compat_ulong_t cdata)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-12-20 04:58:55 -07:00
|
|
|
unsigned long addr = caddr;
|
|
|
|
unsigned long data = cdata;
|
2006-01-08 02:02:33 -07:00
|
|
|
int ret;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
switch (request) {
|
|
|
|
/*
|
|
|
|
* Read 4 bytes of the other process' storage
|
|
|
|
* data is a pointer specifying where the user wants the
|
|
|
|
* 4 bytes copied into
|
|
|
|
* addr is a pointer in the user's storage that contains an 8 byte
|
|
|
|
* address in the other process of the 4 bytes that is to be read
|
|
|
|
* (this is run in a 32-bit process looking at a 64-bit process)
|
|
|
|
* when I and D space are separate, these will need to be fixed.
|
|
|
|
*/
|
|
|
|
case PPC_PTRACE_PEEKTEXT_3264:
|
|
|
|
case PPC_PTRACE_PEEKDATA_3264: {
|
|
|
|
u32 tmp;
|
|
|
|
int copied;
|
|
|
|
u32 __user * addrOthers;
|
|
|
|
|
|
|
|
ret = -EIO;
|
|
|
|
|
|
|
|
/* Get the addr in the other process that we want to read */
|
|
|
|
if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
copied = access_process_vm(child, (u64)addrOthers, &tmp,
|
|
|
|
sizeof(tmp), 0);
|
|
|
|
if (copied != sizeof(tmp))
|
|
|
|
break;
|
|
|
|
ret = put_user(tmp, (u32 __user *)data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Read a register (specified by ADDR) out of the "user area" */
|
|
|
|
case PTRACE_PEEKUSR: {
|
|
|
|
int index;
|
|
|
|
unsigned long tmp;
|
|
|
|
|
|
|
|
ret = -EIO;
|
|
|
|
/* convert to index and check */
|
|
|
|
index = (unsigned long) addr >> 2;
|
|
|
|
if ((addr & 3) || (index > PT_FPSCR32))
|
|
|
|
break;
|
|
|
|
|
2007-09-24 17:50:52 -06:00
|
|
|
CHECK_FULL_REGS(child->thread.regs);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (index < PT_FPR0) {
|
2007-06-03 23:15:44 -06:00
|
|
|
tmp = ptrace_get_reg(child, index);
|
2005-04-16 16:20:36 -06:00
|
|
|
} else {
|
|
|
|
flush_fp_to_thread(child);
|
|
|
|
/*
|
|
|
|
* the user space code considers the floating point
|
|
|
|
* to be an array of unsigned int (32 bits) - the
|
|
|
|
* index passed in is based on this assumption.
|
|
|
|
*/
|
|
|
|
tmp = ((unsigned int *)child->thread.fpr)[index - PT_FPR0];
|
|
|
|
}
|
|
|
|
ret = put_user((unsigned int)tmp, (u32 __user *)data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Read 4 bytes out of the other process' pt_regs area
|
|
|
|
* data is a pointer specifying where the user wants the
|
|
|
|
* 4 bytes copied into
|
|
|
|
* addr is the offset into the other process' pt_regs structure
|
|
|
|
* that is to be read
|
|
|
|
* (this is run in a 32-bit process looking at a 64-bit process)
|
|
|
|
*/
|
|
|
|
case PPC_PTRACE_PEEKUSR_3264: {
|
|
|
|
u32 index;
|
|
|
|
u32 reg32bits;
|
|
|
|
u64 tmp;
|
|
|
|
u32 numReg;
|
|
|
|
u32 part;
|
|
|
|
|
|
|
|
ret = -EIO;
|
|
|
|
/* Determine which register the user wants */
|
|
|
|
index = (u64)addr >> 2;
|
|
|
|
numReg = index / 2;
|
|
|
|
/* Determine which part of the register the user wants */
|
|
|
|
if (index % 2)
|
|
|
|
part = 1; /* want the 2nd half of the register (right-most). */
|
|
|
|
else
|
|
|
|
part = 0; /* want the 1st half of the register (left-most). */
|
|
|
|
|
2007-06-03 23:15:46 -06:00
|
|
|
/* Validate the input - check to see if address is on the wrong boundary
|
|
|
|
* or beyond the end of the user area
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
if ((addr & 3) || numReg > PT_FPSCR)
|
|
|
|
break;
|
|
|
|
|
2007-09-24 17:50:52 -06:00
|
|
|
CHECK_FULL_REGS(child->thread.regs);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (numReg >= PT_FPR0) {
|
|
|
|
flush_fp_to_thread(child);
|
|
|
|
tmp = ((unsigned long int *)child->thread.fpr)[numReg - PT_FPR0];
|
|
|
|
} else { /* register within PT_REGS struct */
|
2007-06-03 23:15:44 -06:00
|
|
|
tmp = ptrace_get_reg(child, numReg);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
reg32bits = ((u32*)&tmp)[part];
|
|
|
|
ret = put_user(reg32bits, (u32 __user *)data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Write 4 bytes into the other process' storage
|
|
|
|
* data is the 4 bytes that the user wants written
|
|
|
|
* addr is a pointer in the user's storage that contains an
|
|
|
|
* 8 byte address in the other process where the 4 bytes
|
|
|
|
* that is to be written
|
|
|
|
* (this is run in a 32-bit process looking at a 64-bit process)
|
|
|
|
* when I and D space are separate, these will need to be fixed.
|
|
|
|
*/
|
|
|
|
case PPC_PTRACE_POKETEXT_3264:
|
|
|
|
case PPC_PTRACE_POKEDATA_3264: {
|
|
|
|
u32 tmp = data;
|
|
|
|
u32 __user * addrOthers;
|
|
|
|
|
|
|
|
/* Get the addr in the other process that we want to write into */
|
|
|
|
ret = -EIO;
|
|
|
|
if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)
|
|
|
|
break;
|
|
|
|
ret = 0;
|
|
|
|
if (access_process_vm(child, (u64)addrOthers, &tmp,
|
|
|
|
sizeof(tmp), 1) == sizeof(tmp))
|
|
|
|
break;
|
|
|
|
ret = -EIO;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* write the word at location addr in the USER area */
|
|
|
|
case PTRACE_POKEUSR: {
|
|
|
|
unsigned long index;
|
|
|
|
|
|
|
|
ret = -EIO;
|
|
|
|
/* convert to index and check */
|
|
|
|
index = (unsigned long) addr >> 2;
|
|
|
|
if ((addr & 3) || (index > PT_FPSCR32))
|
|
|
|
break;
|
|
|
|
|
2007-09-24 17:50:52 -06:00
|
|
|
CHECK_FULL_REGS(child->thread.regs);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (index < PT_FPR0) {
|
2007-06-03 23:15:44 -06:00
|
|
|
ret = ptrace_put_reg(child, index, data);
|
2005-04-16 16:20:36 -06:00
|
|
|
} else {
|
|
|
|
flush_fp_to_thread(child);
|
|
|
|
/*
|
|
|
|
* the user space code considers the floating point
|
|
|
|
* to be an array of unsigned int (32 bits) - the
|
|
|
|
* index passed in is based on this assumption.
|
|
|
|
*/
|
|
|
|
((unsigned int *)child->thread.fpr)[index - PT_FPR0] = data;
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Write 4 bytes into the other process' pt_regs area
|
|
|
|
* data is the 4 bytes that the user wants written
|
|
|
|
* addr is the offset into the other process' pt_regs structure
|
|
|
|
* that is to be written into
|
|
|
|
* (this is run in a 32-bit process looking at a 64-bit process)
|
|
|
|
*/
|
|
|
|
case PPC_PTRACE_POKEUSR_3264: {
|
|
|
|
u32 index;
|
|
|
|
u32 numReg;
|
|
|
|
|
|
|
|
ret = -EIO;
|
|
|
|
/* Determine which register the user wants */
|
|
|
|
index = (u64)addr >> 2;
|
|
|
|
numReg = index / 2;
|
2007-06-03 23:15:46 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* Validate the input - check to see if address is on the
|
|
|
|
* wrong boundary or beyond the end of the user area
|
|
|
|
*/
|
|
|
|
if ((addr & 3) || (numReg > PT_FPSCR))
|
|
|
|
break;
|
2007-09-24 17:50:52 -06:00
|
|
|
CHECK_FULL_REGS(child->thread.regs);
|
2007-06-03 23:15:46 -06:00
|
|
|
if (numReg < PT_FPR0) {
|
|
|
|
unsigned long freg = ptrace_get_reg(child, numReg);
|
|
|
|
if (index % 2)
|
|
|
|
freg = (freg & ~0xfffffffful) | (data & 0xfffffffful);
|
|
|
|
else
|
|
|
|
freg = (freg & 0xfffffffful) | (data << 32);
|
|
|
|
ret = ptrace_put_reg(child, numReg, freg);
|
|
|
|
} else {
|
2005-04-16 16:20:36 -06:00
|
|
|
flush_fp_to_thread(child);
|
2007-06-03 23:15:46 -06:00
|
|
|
((unsigned int *)child->thread.regs)[index] = data;
|
|
|
|
ret = 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2005-09-10 00:01:11 -06:00
|
|
|
case PTRACE_GET_DEBUGREG: {
|
|
|
|
ret = -EINVAL;
|
|
|
|
/* We only support one DABR and no IABRS at the moment */
|
|
|
|
if (addr > 0)
|
|
|
|
break;
|
|
|
|
ret = put_user(child->thread.dabr, (u32 __user *)data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2007-12-20 04:59:04 -07:00
|
|
|
case PTRACE_GETREGS: /* Get all pt_regs from the child. */
|
|
|
|
return copy_regset_to_user(
|
|
|
|
child, task_user_regset_view(current), 0,
|
|
|
|
0, PT_REGS_COUNT * sizeof(compat_long_t),
|
|
|
|
compat_ptr(data));
|
|
|
|
|
|
|
|
case PTRACE_SETREGS: /* Set all gp regs in the child. */
|
|
|
|
return copy_regset_from_user(
|
|
|
|
child, task_user_regset_view(current), 0,
|
|
|
|
0, PT_REGS_COUNT * sizeof(compat_long_t),
|
|
|
|
compat_ptr(data));
|
2005-04-16 16:20:36 -06:00
|
|
|
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
case PTRACE_GETFPREGS:
|
|
|
|
case PTRACE_SETFPREGS:
|
2005-09-10 00:01:07 -06:00
|
|
|
case PTRACE_GETVRREGS:
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
case PTRACE_SETVRREGS:
|
|
|
|
case PTRACE_GETREGS64:
|
|
|
|
case PTRACE_SETREGS64:
|
|
|
|
case PPC_PTRACE_GETFPREGS:
|
|
|
|
case PPC_PTRACE_SETFPREGS:
|
|
|
|
case PTRACE_KILL:
|
|
|
|
case PTRACE_SINGLESTEP:
|
|
|
|
case PTRACE_DETACH:
|
|
|
|
case PTRACE_SET_DEBUGREG:
|
|
|
|
case PTRACE_SYSCALL:
|
|
|
|
case PTRACE_CONT:
|
|
|
|
ret = arch_ptrace(child, request, addr, data);
|
2005-09-10 00:01:07 -06:00
|
|
|
break;
|
|
|
|
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
/* Old reverse args ptrace callss */
|
|
|
|
case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */
|
|
|
|
case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */
|
|
|
|
ret = compat_ptrace_old(child, request, addr, data);
|
2005-09-10 00:01:07 -06:00
|
|
|
break;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
default:
|
2007-12-20 04:58:49 -07:00
|
|
|
ret = compat_ptrace_request(child, request, addr, data);
|
2005-04-16 16:20:36 -06:00
|
|
|
break;
|
|
|
|
}
|
2007-12-20 04:58:55 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
return ret;
|
|
|
|
}
|