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-rw-r--r--arch/sparc/kernel/entry.S17
-rw-r--r--arch/sparc/kernel/ptrace.c462
2 files changed, 63 insertions, 416 deletions
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index 88d2cefd01be..c2eed8f71516 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -1224,23 +1224,6 @@ sys_nis_syscall:
call c_sys_nis_syscall
mov %l5, %o7
- .align 4
- .globl sys_ptrace
-sys_ptrace:
- call do_ptrace
- add %sp, STACKFRAME_SZ, %o0
-
- ld [%curptr + TI_FLAGS], %l5
- andcc %l5, _TIF_SYSCALL_TRACE, %g0
- be 1f
- nop
-
- call syscall_trace
- nop
-
-1:
- RESTORE_ALL
-
.align 4
.globl sys_execve
sys_execve:
diff --git a/arch/sparc/kernel/ptrace.c b/arch/sparc/kernel/ptrace.c
index 29fa6e5cb450..1c0d5363f720 100644
--- a/arch/sparc/kernel/ptrace.c
+++ b/arch/sparc/kernel/ptrace.c
@@ -26,215 +26,6 @@
#include <asm/system.h>
#include <asm/uaccess.h>
-#define MAGIC_CONSTANT 0x80000000
-
-
-/* Returning from ptrace is a bit tricky because the syscall return
- * low level code assumes any value returned which is negative and
- * is a valid errno will mean setting the condition codes to indicate
- * an error return. This doesn't work, so we have this hook.
- */
-static inline void pt_error_return(struct pt_regs *regs, unsigned long error)
-{
- regs->u_regs[UREG_I0] = error;
- regs->psr |= PSR_C;
- regs->pc = regs->npc;
- regs->npc += 4;
-}
-
-static inline void pt_succ_return(struct pt_regs *regs, unsigned long value)
-{
- regs->u_regs[UREG_I0] = value;
- regs->psr &= ~PSR_C;
- regs->pc = regs->npc;
- regs->npc += 4;
-}
-
-static void
-pt_succ_return_linux(struct pt_regs *regs, unsigned long value, long __user *addr)
-{
- if (put_user(value, addr)) {
- pt_error_return(regs, EFAULT);
- return;
- }
- regs->u_regs[UREG_I0] = 0;
- regs->psr &= ~PSR_C;
- regs->pc = regs->npc;
- regs->npc += 4;
-}
-
-static void
-pt_os_succ_return (struct pt_regs *regs, unsigned long val, long __user *addr)
-{
- if (current->personality == PER_SUNOS)
- pt_succ_return (regs, val);
- else
- pt_succ_return_linux (regs, val, addr);
-}
-
-/* Fuck me gently with a chainsaw... */
-static inline void read_sunos_user(struct pt_regs *regs, unsigned long offset,
- struct task_struct *tsk, long __user *addr)
-{
- struct pt_regs *cregs = tsk->thread.kregs;
- struct thread_info *t = task_thread_info(tsk);
- int v;
-
- if(offset >= 1024)
- offset -= 1024; /* whee... */
- if(offset & ((sizeof(unsigned long) - 1))) {
- pt_error_return(regs, EIO);
- return;
- }
- if(offset >= 16 && offset < 784) {
- offset -= 16; offset >>= 2;
- pt_os_succ_return(regs, *(((unsigned long *)(&t->reg_window[0]))+offset), addr);
- return;
- }
- if(offset >= 784 && offset < 832) {
- offset -= 784; offset >>= 2;
- pt_os_succ_return(regs, *(((unsigned long *)(&t->rwbuf_stkptrs[0]))+offset), addr);
- return;
- }
- switch(offset) {
- case 0:
- v = t->ksp;
- break;
- case 4:
- v = t->kpc;
- break;
- case 8:
- v = t->kpsr;
- break;
- case 12:
- v = t->uwinmask;
- break;
- case 832:
- v = t->w_saved;
- break;
- case 896:
- v = cregs->u_regs[UREG_I0];
- break;
- case 900:
- v = cregs->u_regs[UREG_I1];
- break;
- case 904:
- v = cregs->u_regs[UREG_I2];
- break;
- case 908:
- v = cregs->u_regs[UREG_I3];
- break;
- case 912:
- v = cregs->u_regs[UREG_I4];
- break;
- case 916:
- v = cregs->u_regs[UREG_I5];
- break;
- case 920:
- v = cregs->u_regs[UREG_I6];
- break;
- case 924:
- if(tsk->thread.flags & MAGIC_CONSTANT)
- v = cregs->u_regs[UREG_G1];
- else
- v = 0;
- break;
- case 940:
- v = cregs->u_regs[UREG_I0];
- break;
- case 944:
- v = cregs->u_regs[UREG_I1];
- break;
-
- case 948:
- /* Isn't binary compatibility _fun_??? */
- if(cregs->psr & PSR_C)
- v = cregs->u_regs[UREG_I0] << 24;
- else
- v = 0;
- break;
-
- /* Rest of them are completely unsupported. */
- default:
- printk("%s [%d]: Wants to read user offset %ld\n",
- current->comm, task_pid_nr(current), offset);
- pt_error_return(regs, EIO);
- return;
- }
- if (current->personality == PER_SUNOS)
- pt_succ_return (regs, v);
- else
- pt_succ_return_linux (regs, v, addr);
- return;
-}
-
-static inline void write_sunos_user(struct pt_regs *regs, unsigned long offset,
- struct task_struct *tsk)
-{
- struct pt_regs *cregs = tsk->thread.kregs;
- struct thread_info *t = task_thread_info(tsk);
- unsigned long value = regs->u_regs[UREG_I3];
-
- if(offset >= 1024)
- offset -= 1024; /* whee... */
- if(offset & ((sizeof(unsigned long) - 1)))
- goto failure;
- if(offset >= 16 && offset < 784) {
- offset -= 16; offset >>= 2;
- *(((unsigned long *)(&t->reg_window[0]))+offset) = value;
- goto success;
- }
- if(offset >= 784 && offset < 832) {
- offset -= 784; offset >>= 2;
- *(((unsigned long *)(&t->rwbuf_stkptrs[0]))+offset) = value;
- goto success;
- }
- switch(offset) {
- case 896:
- cregs->u_regs[UREG_I0] = value;
- break;
- case 900:
- cregs->u_regs[UREG_I1] = value;
- break;
- case 904:
- cregs->u_regs[UREG_I2] = value;
- break;
- case 908:
- cregs->u_regs[UREG_I3] = value;
- break;
- case 912:
- cregs->u_regs[UREG_I4] = value;
- break;
- case 916:
- cregs->u_regs[UREG_I5] = value;
- break;
- case 920:
- cregs->u_regs[UREG_I6] = value;
- break;
- case 924:
- cregs->u_regs[UREG_I7] = value;
- break;
- case 940:
- cregs->u_regs[UREG_I0] = value;
- break;
- case 944:
- cregs->u_regs[UREG_I1] = value;
- break;
-
- /* Rest of them are completely unsupported or "no-touch". */
- default:
- printk("%s [%d]: Wants to write user offset %ld\n",
- current->comm, task_pid_nr(current), offset);
- goto failure;
- }
-success:
- pt_succ_return(regs, 0);
- return;
-failure:
- pt_error_return(regs, EIO);
- return;
-}
-
/* #define ALLOW_INIT_TRACING */
/*
@@ -528,113 +319,42 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
return &user_sparc32_view;
}
-asmlinkage void do_ptrace(struct pt_regs *regs)
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
- unsigned long request = regs->u_regs[UREG_I0];
- unsigned long pid = regs->u_regs[UREG_I1];
- unsigned long addr = regs->u_regs[UREG_I2];
- unsigned long data = regs->u_regs[UREG_I3];
- unsigned long addr2 = regs->u_regs[UREG_I4];
- struct task_struct *child;
- int ret;
-
- lock_kernel();
-
- if (request == PTRACE_TRACEME) {
- ret = ptrace_traceme();
- if (ret < 0)
- pt_error_return(regs, -ret);
- else
- pt_succ_return(regs, 0);
- goto out;
- }
-
- child = ptrace_get_task_struct(pid);
- if (IS_ERR(child)) {
- ret = PTR_ERR(child);
- pt_error_return(regs, -ret);
- goto out;
- }
-
- if (request == PTRACE_ATTACH) {
- if (ptrace_attach(child)) {
- pt_error_return(regs, EPERM);
- goto out_tsk;
- }
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
-
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (ret < 0) {
- pt_error_return(regs, -ret);
- goto out_tsk;
- }
+ unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
+ int i, ret;
switch(request) {
- case PTRACE_PEEKTEXT: /* read word at location addr. */
- case PTRACE_PEEKDATA: {
- unsigned long tmp;
-
- if (access_process_vm(child, addr,
- &tmp, sizeof(tmp), 0) == sizeof(tmp))
- pt_os_succ_return(regs, tmp, (long __user *)data);
- else
- pt_error_return(regs, EIO);
- goto out_tsk;
- }
-
- case PTRACE_PEEKUSR:
- read_sunos_user(regs, addr, child, (long __user *) data);
- goto out_tsk;
-
- case PTRACE_POKEUSR:
- write_sunos_user(regs, addr, child);
- goto out_tsk;
-
- case PTRACE_POKETEXT: /* write the word at location addr. */
- case PTRACE_POKEDATA: {
- if (access_process_vm(child, addr,
- &data, sizeof(data), 1) == sizeof(data))
- pt_succ_return(regs, 0);
- else
- pt_error_return(regs, EIO);
- goto out_tsk;
- }
-
case PTRACE_GETREGS: {
struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
struct pt_regs *cregs = child->thread.kregs;
- int rval;
- if (!access_ok(VERIFY_WRITE, pregs, sizeof(struct pt_regs))) {
- rval = -EFAULT;
- pt_error_return(regs, -rval);
- goto out_tsk;
- }
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, pregs, sizeof(struct pt_regs)))
+ break;
+
__put_user(cregs->psr, (&pregs->psr));
__put_user(cregs->pc, (&pregs->pc));
__put_user(cregs->npc, (&pregs->npc));
__put_user(cregs->y, (&pregs->y));
- for(rval = 1; rval < 16; rval++)
- __put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]));
- pt_succ_return(regs, 0);
- goto out_tsk;
+ for (i = 1; i < 16; i++)
+ __put_user(cregs->u_regs[i], &pregs->u_regs[i - 1]);
+ ret = 0;
+ break;
}
case PTRACE_SETREGS: {
struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
struct pt_regs *cregs = child->thread.kregs;
unsigned long psr, pc, npc, y;
- int i;
/* Must be careful, tracing process can only set certain
* bits in the psr.
*/
- if (!access_ok(VERIFY_READ, pregs, sizeof(struct pt_regs))) {
- pt_error_return(regs, EFAULT);
- goto out_tsk;
- }
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_READ, pregs, sizeof(struct pt_regs)))
+ break;
+
__get_user(psr, (&pregs->psr));
__get_user(pc, (&pregs->pc));
__get_user(npc, (&pregs->npc));
@@ -647,10 +367,10 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
cregs->npc =npc;
}
cregs->y = y;
- for(i = 1; i < 16; i++)
- __get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]));
- pt_succ_return(regs, 0);
- goto out_tsk;
+ for (i = 1; i < 16; i++)
+ __get_user(cregs->u_regs[i], &pregs->u_regs[i-1]);
+ ret = 0;
+ break;
}
case PTRACE_GETFPREGS: {
@@ -666,26 +386,25 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
} fpq[16];
};
struct fps __user *fps = (struct fps __user *) addr;
- int i;
- if (!access_ok(VERIFY_WRITE, fps, sizeof(struct fps))) {
- i = -EFAULT;
- pt_error_return(regs, -i);
- goto out_tsk;
- }
- for(i = 0; i < 32; i++)
- __put_user(child->thread.float_regs[i], (&fps->regs[i]));
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, fps, sizeof(struct fps)))
+ break;
+
+ for (i = 0; i < 32; i++)
+ __put_user(child->thread.float_regs[i], &fps->regs[i]);
__put_user(child->thread.fsr, (&fps->fsr));
__put_user(child->thread.fpqdepth, (&fps->fpqd));
__put_user(0, (&fps->flags));
__put_user(0, (&fps->extra));
- for(i = 0; i < 16; i++) {
+ for (i = 0; i < 16; i++) {
__put_user(child->thread.fpqueue[i].insn_addr,
(&fps->fpq[i].insnaddr));
- __put_user(child->thread.fpqueue[i].insn, (&fps->fpq[i].insn));
+ __put_user(child->thread.fpqueue[i].insn,
+ &fps->fpq[i].insn);
}
- pt_succ_return(regs, 0);
- goto out_tsk;
+ ret = 0;
+ break;
}
case PTRACE_SETFPREGS: {
@@ -701,107 +420,53 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
} fpq[16];
};
struct fps __user *fps = (struct fps __user *) addr;
- int i;
- if (!access_ok(VERIFY_READ, fps, sizeof(struct fps))) {
- i = -EFAULT;
- pt_error_return(regs, -i);
- goto out_tsk;
- }
- copy_from_user(&child->thread.float_regs[0], &fps->regs[0], (32 * sizeof(unsigned long)));
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_READ, fps, sizeof(struct fps)))
+ break;
+
+ copy_from_user(&child->thread.float_regs[0], &fps->regs[0],
+ (32 * sizeof(unsigned long)));
__get_user(child->thread.fsr, (&fps->fsr));
__get_user(child->thread.fpqdepth, (&fps->fpqd));
- for(i = 0; i < 16; i++) {
+ for (i = 0; i < 16; i++) {
__get_user(child->thread.fpqueue[i].insn_addr,
(&fps->fpq[i].insnaddr));
- __get_user(child->thread.fpqueue[i].insn, (&fps->fpq[i].insn));
+ __get_user(child->thread.fpqueue[i].insn,
+ &fps->fpq[i].insn);
}
- pt_succ_return(regs, 0);
- goto out_tsk;
+ ret = 0;
+ break;
}
case PTRACE_READTEXT:
- case PTRACE_READDATA: {
- int res = ptrace_readdata(child, addr,
- (void __user *) addr2, data);
-
- if (res == data) {
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
- /* Partial read is an IO failure */
- if (res >= 0)
- res = -EIO;
- pt_error_return(regs, -res);
- goto out_tsk;
- }
+ case PTRACE_READDATA:
+ ret = ptrace_readdata(child, addr,
+ (void __user *) addr2, data);
+
+ if (ret == data)
+ ret = 0;
+ else if (ret >= 0)
+ ret = -EIO;
+ break;
case PTRACE_WRITETEXT:
- case PTRACE_WRITEDATA: {
- int res = ptrace_writedata(child, (void __user *) addr2,
- addr, data);
-
- if (res == data) {
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
- /* Partial write is an IO failure */
- if (res >= 0)
- res = -EIO;
- pt_error_return(regs, -res);
- goto out_tsk;
- }
-
- case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */
- addr = 1;
-
- case PTRACE_CONT: { /* restart after signal. */
- if (!valid_signal(data)) {
- pt_error_return(regs, EIO);
- goto out_tsk;
- }
-
- 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;
- wake_up_process(child);
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
+ case PTRACE_WRITEDATA:
+ ret = ptrace_writedata(child, (void __user *) addr2,
+ addr, data);
+
+ if (ret == data)
+ ret = 0;
+ else if (ret >= 0)
+ ret = -EIO;
+ 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 */
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
- wake_up_process(child);
- child->exit_code = SIGKILL;
- pt_succ_return(regs, 0);
- goto out_tsk;
+ default:
+ ret = ptrace_request(child, request, addr, data);
+ break;
}
- default: {
- int err = ptrace_request(child, request, addr, data);
- if (err)
- pt_error_return(regs, -err);
- else
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
- }
-out_tsk:
- if (child)
- put_task_struct(child);
-out:
- unlock_kernel();
+ return ret;
}
asmlinkage void syscall_trace(void)
@@ -810,7 +475,6 @@ asmlinkage void syscall_trace(void)
return;
if (!(current->ptrace & PT_PTRACED))
return;
- current->thread.flags ^= MAGIC_CONSTANT;
ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
? 0x80 : 0));
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 08:44:54 +0000