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authorDaniel Jacobowitz <dan@debian.org>2005-09-28 18:11:15 -0400
committerRalf Baechle <ralf@linux-mips.org>2005-10-29 19:32:29 +0100
commitea3d710fe572f0af4d242701973f7363b2146429 (patch)
treeb8c7138296d4e19b7101b51bfeb6677d27185bc7 /arch/mips/kernel/ptrace32.c
parent9043f7e95d104795fcb03a2f762524babcd49da5 (diff)
downloadlinux-ea3d710fe572f0af4d242701973f7363b2146429.tar.bz2
Revise MIPS 64-bit ptrace interface
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>
Diffstat (limited to 'arch/mips/kernel/ptrace32.c')
-rw-r--r--arch/mips/kernel/ptrace32.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 5c45a5880226..c28cdddd4c21 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -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;