-/* Target-dependent code for Linux running on i386's, for GDB.
- Copyright 2000, 2001 Free Software Foundation, Inc.
+/* Target-dependent code for GNU/Linux running on i386's, for GDB.
+
+ Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GDB.
#include "solib-svr4.h" /* For struct link_map_offsets. */
+#include "i386-tdep.h"
+#include "i386-linux-tdep.h"
+
/* Return the name of register REG. */
-char *
+static char *
i386_linux_register_name (int reg)
{
/* Deal with the extra "orig_eax" pseudo register. */
return i386_register_name (reg);
}
-int
+static int
i386_linux_register_byte (int reg)
{
/* Deal with the extra "orig_eax" pseudo register. */
return i386_register_byte (reg);
}
-int
+static int
i386_linux_register_raw_size (int reg)
{
/* Deal with the extra "orig_eax" pseudo register. */
\f
/* Recognizing signal handler frames. */
-/* Linux has two flavors of signals. Normal signal handlers, and
+/* GNU/Linux has two flavors of signals. Normal signal handlers, and
"realtime" (RT) signals. The RT signals can provide additional
information to the signal handler if the SA_SIGINFO flag is set
when establishing a signal handler using `sigaction'. It is not
- unlikely that future versions of Linux will support SA_SIGINFO for
- normal signals too. */
+ unlikely that future versions of GNU/Linux will support SA_SIGINFO
+ for normal signals too. */
/* When the i386 Linux kernel calls a signal handler and the
SA_RESTORER flag isn't set, the return address points to a bit of
It kind of sucks that we have to read memory from the process in
order to identify a signal trampoline, but there doesn't seem to be
- any other way. The IN_SIGTRAMP macro in tm-linux.h arranges to
+ any other way. The PC_IN_SIGTRAMP macro in tm-linux.h arranges to
only call us if no function name could be identified, which should
be the case since the code is on the stack.
return pc;
}
-/* Return whether PC is in a Linux sigtramp routine. */
+/* Return whether PC is in a GNU/Linux sigtramp routine. */
-int
-i386_linux_in_sigtramp (CORE_ADDR pc, char *name)
+static int
+i386_linux_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
if (name)
return STREQ ("__restore", name) || STREQ ("__restore_rt", name);
|| i386_linux_rt_sigtramp_start (pc) != 0);
}
-/* Assuming FRAME is for a Linux sigtramp routine, return the address
- of the associated sigcontext structure. */
+/* Assuming FRAME is for a GNU/Linux sigtramp routine, return the
+ address of the associated sigcontext structure. */
CORE_ADDR
i386_linux_sigcontext_addr (struct frame_info *frame)
/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
#define LINUX_SIGCONTEXT_PC_OFFSET (56)
-/* Assuming FRAME is for a Linux sigtramp routine, return the saved
- program counter. */
+/* Assuming FRAME is for a GNU/Linux sigtramp routine, return the
+ saved program counter. */
static CORE_ADDR
i386_linux_sigtramp_saved_pc (struct frame_info *frame)
/* Offset to saved SP in sigcontext, from <asm/sigcontext.h>. */
#define LINUX_SIGCONTEXT_SP_OFFSET (28)
-/* Assuming FRAME is for a Linux sigtramp routine, return the saved
- stack pointer. */
+/* Assuming FRAME is for a GNU/Linux sigtramp routine, return the
+ saved stack pointer. */
static CORE_ADDR
i386_linux_sigtramp_saved_sp (struct frame_info *frame)
in progress when the signal trampoline was entered. GDB mostly
treats this frame pointer value as a magic cookie. We detect the
case of a signal trampoline by looking at the SIGNAL_HANDLER_CALLER
- field, which is set based on IN_SIGTRAMP.
+ field, which is set based on PC_IN_SIGTRAMP.
When a signal trampoline is invoked from a frameless function, we
essentially have two frameless functions in a row. In this case,
/* Set the program counter for process PTID to PC. */
-void
+static void
i386_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
{
write_register_pid (PC_REGNUM, pc, ptid);
It's kind of gross to do all these checks every time we're
called, since they don't change once the executable has gotten
started. But this is only a temporary hack --- upcoming versions
- of Linux will provide a portable, efficient interface for
+ of GNU/Linux will provide a portable, efficient interface for
debugging programs that use shared libraries. */
struct objfile *objfile;
}
/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for native Linux/x86 targets using the struct offsets
+ structure for native GNU/Linux x86 targets using the struct offsets
defined in link.h (but without actual reference to that file).
- This makes it possible to access Linux/x86 shared libraries from a
- GDB that was not built on an Linux/x86 host (for cross debugging). */
+ This makes it possible to access GNU/Linux x86 shared libraries
+ from a GDB that was not built on an GNU/Linux x86 host (for cross
+ debugging). */
-struct link_map_offsets *
+static struct link_map_offsets *
i386_linux_svr4_fetch_link_map_offsets (void)
{
static struct link_map_offsets lmo;
return lmp;
}
+\f
+
+static void
+i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* GNU/Linux uses ELF. */
+ i386_elf_init_abi (info, gdbarch);
+
+ /* We support the SSE registers on GNU/Linux. */
+ tdep->num_xmm_regs = I386_NUM_XREGS - 1;
+ /* set_gdbarch_num_regs (gdbarch, I386_SSE_NUM_REGS); */
+
+ /* Since we have the extra "orig_eax" register on GNU/Linux, we have
+ to adjust a few things. */
+
+ set_gdbarch_write_pc (gdbarch, i386_linux_write_pc);
+ set_gdbarch_num_regs (gdbarch, I386_SSE_NUM_REGS + 1);
+ set_gdbarch_register_name (gdbarch, i386_linux_register_name);
+ set_gdbarch_register_bytes (gdbarch, I386_SSE_SIZEOF_REGS + 4);
+ set_gdbarch_register_byte (gdbarch, i386_linux_register_byte);
+ set_gdbarch_register_raw_size (gdbarch, i386_linux_register_raw_size);
+
+ tdep->jb_pc_offset = 20; /* From <bits/setjmp.h>. */
+
+ /* When the i386 Linux kernel calls a signal handler, the return
+ address points to a bit of code on the stack. These definitions
+ are used to identify this bit of code as a signal trampoline in
+ order to support backtracing through calls to signal handlers. */
+
+ set_gdbarch_pc_in_sigtramp (gdbarch, i386_linux_pc_in_sigtramp);
+ set_gdbarch_frame_chain (gdbarch, i386_linux_frame_chain);
+ set_gdbarch_frame_saved_pc (gdbarch, i386_linux_frame_saved_pc);
+ set_gdbarch_saved_pc_after_call (gdbarch, i386_linux_saved_pc_after_call);
+ tdep->sigtramp_saved_pc = i386_linux_sigtramp_saved_pc;
+
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ i386_linux_svr4_fetch_link_map_offsets);
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern void _initialize_i386_linux_tdep (void);
+
+void
+_initialize_i386_linux_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_LINUX,
+ i386_linux_init_abi);
+}
projects / deliverable / binutils-gdb.git / blobdiff