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authorMark Shinwell <shinwell@codesourcery.com>2007-04-20 12:13:52 +0000
committerMark Shinwell <shinwell@codesourcery.com>2007-04-20 12:13:52 +0000
commit0ebdb728995b222255963e66f68285a0f1cb2a4b (patch)
tree4772ecbfcd69d7b3544ba2d8a51f26d88055a5d4 /gdb/m68klinux-tdep.c
parent0bbdef9222a58f6f3b6743a452c366976543f81c (diff)
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* Makefile.in: Adjust dependencies of m68klinux-tdep.c.
* m68klinux-tdep.c (m68k_uclinux_sigcontext_reg_offset): New. (m68k_linux_sigcontext_reg_offset): Fix typo. (target_is_uclinux): New. (m68k_linux_inferior_created): New. (m68k_linux_get_sigtramp_info): Check for uClinux or normal Linux. Use m68k_uclinux_sigcontext_reg_offset for uClinux. (_initialize_m68k_linux_tdep): Register m68k_linux_inferior_created.
Diffstat (limited to 'gdb/m68klinux-tdep.c')
-rw-r--r--gdb/m68klinux-tdep.c66
1 files changed, 64 insertions, 2 deletions
diff --git a/gdb/m68klinux-tdep.c b/gdb/m68klinux-tdep.c
index 4252ecd..5741396 100644
--- a/gdb/m68klinux-tdep.c
+++ b/gdb/m68klinux-tdep.c
@@ -37,6 +37,9 @@
#include "frame-unwind.h"
#include "glibc-tdep.h"
#include "solib-svr4.h"
+#include "auxv.h"
+#include "observer.h"
+#include "elf/common.h"
/* Offsets (in target ints) into jmp_buf. */
@@ -112,7 +115,7 @@ static int m68k_linux_sigcontext_reg_offset[M68K_NUM_REGS] =
-1, /* %a5 */
-1, /* %fp */
1 * 4, /* %sp */
- 5 * 4 + 2, /* %sr */
+ 6 * 4, /* %sr */
6 * 4 + 2, /* %pc */
8 * 4, /* %fp0 */
11 * 4, /* %fp1 */
@@ -127,6 +130,39 @@ static int m68k_linux_sigcontext_reg_offset[M68K_NUM_REGS] =
16 * 4 /* %fpiaddr */
};
+static int m68k_uclinux_sigcontext_reg_offset[M68K_NUM_REGS] =
+{
+ 2 * 4, /* %d0 */
+ 3 * 4, /* %d1 */
+ -1, /* %d2 */
+ -1, /* %d3 */
+ -1, /* %d4 */
+ -1, /* %d5 */
+ -1, /* %d6 */
+ -1, /* %d7 */
+ 4 * 4, /* %a0 */
+ 5 * 4, /* %a1 */
+ -1, /* %a2 */
+ -1, /* %a3 */
+ -1, /* %a4 */
+ 6 * 4, /* %a5 */
+ -1, /* %fp */
+ 1 * 4, /* %sp */
+ 7 * 4, /* %sr */
+ 7 * 4 + 2, /* %pc */
+ -1, /* %fp0 */
+ -1, /* %fp1 */
+ -1, /* %fp2 */
+ -1, /* %fp3 */
+ -1, /* %fp4 */
+ -1, /* %fp5 */
+ -1, /* %fp6 */
+ -1, /* %fp7 */
+ -1, /* %fpcr */
+ -1, /* %fpsr */
+ -1 /* %fpiaddr */
+};
+
/* From <asm/ucontext.h>. */
static int m68k_linux_ucontext_reg_offset[M68K_NUM_REGS] =
{
@@ -173,6 +209,17 @@ struct m68k_linux_sigtramp_info
int *sc_reg_offset;
};
+/* Nonzero if running on uClinux. */
+static int target_is_uclinux;
+
+static void
+m68k_linux_inferior_created (struct target_ops *objfile, int from_tty)
+{
+ /* Record that we will need to re-evaluate whether we are running on
+ a uClinux or normal Linux target (see m68k_linux_get_sigtramp_info). */
+ target_is_uclinux = -1;
+}
+
static struct m68k_linux_sigtramp_info
m68k_linux_get_sigtramp_info (struct frame_info *next_frame)
{
@@ -180,6 +227,18 @@ m68k_linux_get_sigtramp_info (struct frame_info *next_frame)
char buf[4];
struct m68k_linux_sigtramp_info info;
+ if (target_is_uclinux == -1)
+ {
+ /* Determine whether we are running on a uClinux or normal Linux
+ target so we can use the correct sigcontext layouts. */
+
+ CORE_ADDR dummy;
+
+ target_is_uclinux
+ = target_auxv_search (&current_target, AT_NULL, &dummy) > 0
+ && target_auxv_search (&current_target, AT_PAGESZ, &dummy) == 0;
+ }
+
frame_unwind_register (next_frame, M68K_SP_REGNUM, buf);
sp = extract_unsigned_integer (buf, 4);
@@ -189,7 +248,9 @@ m68k_linux_get_sigtramp_info (struct frame_info *next_frame)
if (m68k_linux_pc_in_sigtramp (frame_pc_unwind (next_frame), 0) == 2)
info.sc_reg_offset = m68k_linux_ucontext_reg_offset;
else
- info.sc_reg_offset = m68k_linux_sigcontext_reg_offset;
+ info.sc_reg_offset
+ = target_is_uclinux ? m68k_uclinux_sigcontext_reg_offset
+ : m68k_linux_sigcontext_reg_offset;
return info;
}
@@ -319,4 +380,5 @@ _initialize_m68k_linux_tdep (void)
{
gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_LINUX,
m68k_linux_init_abi);
+ observer_attach_inferior_created (m68k_linux_inferior_created);
}