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2004-02-23 David Mosberger <davidm@hpl.hp.com>

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Committed by Kevin Buettner <kevinb@redhat.com>.

	* ia64-tdep.h (ia64_write_pc, ia64_linux_write_pc): Declare.
	* ia64-tdep.c (ia64_write_pc): Make it a global function.
	(ia64_gdbarch_init): For Linux targets, use ia64_linux_write_pc()
	instead of ia64_write_pc().
	* ia64-linux-tdep.c (regcache.h): Include.
	(ia64_linux_write_pc): New function.
This commit is contained in:
Kevin Buettner
2004-02-24 22:35:01 +00:00
parent 9b1f5ff99b
commit 54a5c8d8da
4 changed files with 37 additions and 2 deletions
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18
gdb/ia64-linux-tdep.c
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@ -23,6 +23,7 @@
#include "ia64-tdep.h"
#include "arch-utils.h"
#include "gdbcore.h"
#include "regcache.h"
/* The sigtramp code is in a non-readable (executable-only) region
of memory called the ``gate page''. The addresses in question
@ -94,3 +95,20 @@ ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
return 0;
}
}
void
ia64_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
{
ia64_write_pc (pc, ptid);
/* We must be careful with modifying the instruction-pointer: if we
just interrupt a system call, the kernel would ordinarily try to
restart it when we resume the inferior, which typically results
in SIGSEGV or SIGILL. We prevent this by clearing r10, which
will tell the kernel that r8 does NOT contain a valid error code
and hence it will skip system-call restart.
The clearing of r10 is safe as long as ia64_write_pc() is only
called as part of setting up an inferior call. */
write_register_pid (IA64_GR10_REGNUM, 0, ptid);
}