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authorDavid S. Miller <davem@davemloft.net>2005-04-17 18:03:11 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 18:03:11 -0700
commitfb65b9619b756793d824df7501c895a2c2871f40 (patch)
tree8a594fd4be652d14e3795d046eeda2dc33103c33 /arch/sparc64/kernel
parent961f8bc9fc91c39a3fe169f3b6d3df1b096769d3 (diff)
[PATCH] sparc: Fix PTRACE_CONT bogosity
SunOS aparently had this weird PTRACE_CONT semantic which we copied. If the addr argument is something other than 1, it sets the process program counter to whatever that value is. This is different from every other Linux architecture, which don't do anything with the addr and data args. This difference in particular breaks the Linux native GDB support for fork and vfork tracing on sparc and sparc64. There is no interest in running SunOS binaries using this weird PTRACE_CONT behavior, so just delete it so we behave like other platforms do. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/sparc64/kernel')
-rw-r--r--arch/sparc64/kernel/ptrace.c19
1 files changed, 0 insertions, 19 deletions
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
index 1722dc51b0d..08bac537262 100644
--- a/arch/sparc64/kernel/ptrace.c
+++ b/arch/sparc64/kernel/ptrace.c
@@ -514,25 +514,6 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
pt_error_return(regs, EIO);
goto out_tsk;
}
- if (addr != 1) {
- unsigned long pc_mask = ~0UL;
-
- if ((child->thread_info->flags & _TIF_32BIT) != 0)
- pc_mask = 0xffffffff;
-
- if (addr & 3) {
- pt_error_return(regs, EINVAL);
- goto out_tsk;
- }
-#ifdef DEBUG_PTRACE
- printk ("Original: %016lx %016lx\n",
- child->thread_info->kregs->tpc,
- child->thread_info->kregs->tnpc);
- printk ("Continuing with %016lx %016lx\n", addr, addr+4);
-#endif
- child->thread_info->kregs->tpc = (addr & pc_mask);
- child->thread_info->kregs->tnpc = ((addr + 4) & pc_mask);
- }
if (request == PTRACE_SYSCALL) {
set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);