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Revise MIPS 64-bit ptrace interface

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Change the N32 debugging ABI to something more sane, and add support
for o32 and n32 debuggers to trace n64 programs.
    
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Daniel Jacobowitz
2005-09-28 18:11:15 -04:00
committed by Ralf Baechle
parent 9043f7e95d
commit ea3d710fe5
4 changed files with 222 additions and 5 deletions
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81
arch/mips/kernel/ptrace32.c
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@@ -35,6 +35,12 @@
#include <asm/uaccess.h>
#include <asm/bootinfo.h>
int ptrace_getregs (struct task_struct *child, __s64 __user *data);
int ptrace_setregs (struct task_struct *child, __s64 __user *data);
int ptrace_getfpregs (struct task_struct *child, __u32 __user *data);
int ptrace_setfpregs (struct task_struct *child, __u32 __user *data);
/*
* Tracing a 32-bit process with a 64-bit strace and vice versa will not
* work. I don't know how to fix this.
@@ -99,6 +105,35 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
break;
}
/*
* 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 PTRACE_PEEKTEXT_3264:
case 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 *) (unsigned long) 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 *) (unsigned long) data);
break;
}
/* Read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
struct pt_regs *regs;
@@ -202,6 +237,31 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
ret = -EIO;
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 PTRACE_POKETEXT_3264:
case PTRACE_POKEDATA_3264: {
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 *) (unsigned long) addr) != 0)
break;
ret = 0;
if (access_process_vm(child, (u64)addrOthers, &data,
sizeof(data), 1) == sizeof(data))
break;
ret = -EIO;
break;
}
case PTRACE_POKEUSR: {
struct pt_regs *regs;
ret = 0;
@@ -276,6 +336,22 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
break;
}
case PTRACE_GETREGS:
ret = ptrace_getregs (child, (__u64 __user *) (__u64) data);
break;
case PTRACE_SETREGS:
ret = ptrace_setregs (child, (__u64 __user *) (__u64) data);
break;
case PTRACE_GETFPREGS:
ret = ptrace_getfpregs (child, (__u32 __user *) (__u64) data);
break;
case PTRACE_SETFPREGS:
ret = ptrace_setfpregs (child, (__u32 __user *) (__u64) data);
break;
case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
case PTRACE_CONT: { /* restart after signal. */
ret = -EIO;
@@ -320,6 +396,11 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
(unsigned int __user *) (unsigned long) data);
break;
case PTRACE_GET_THREAD_AREA_3264:
ret = put_user(child->thread_info->tp_value,
(unsigned long __user *) (unsigned long) data);
break;
default:
ret = ptrace_request(child, request, addr, data);
break;