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authorJason Thorpe <thorpej@netbsd.org>2002-04-26 01:08:19 +0000
committerJason Thorpe <thorpej@netbsd.org>2002-04-26 01:08:19 +0000
commitaccc6d1ff368635135fb961397da748a4505008c (patch)
tree9e67a682a1462c55bb84208a36c39a7b38d9d03a
parentd5ba2a0169386af2ecd2e678876297ee4bee61da (diff)
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* alpha-tdep.h (gdbarch_tdep): Add jb_pc and jb_elt_size members.
* alpha-linux-tdep.c (alpha_linux_init_abi): Initialize tdep->jb_pc and tdep->jb_elt_size. * alpha-osf1-tdep.c (alpha_osf1_init_abi): Likewise. * alphafbsd-tdep.c (alphafbsd_init_abi): Likewise. * alphanbsd-tdep.c (alphanbsd_init_abi): Likewise. * alpha-nat.c (get_longjmp_target): Remove. (JB_ELEMENT_SIZE): Ditto. (JB_PC): Ditto. * alpha-tdep.c (alpha_get_longjmp_target): New function. (alpha_gdbarch_init): Default tdep->jb_pc to -1. If the OS ABI sets jb_pc to a valid value, set gdbarch_get_longjmp_target to alpha_get_longjmp_target. (alpha_dump_tdep): Report tdep->jb_pc and tdep->jb_elt_size. * config/alpha/nm-linux.h (GET_LONGJMP_TARGET): Remove. * config/alpha/nm-osf.h (GET_LONGJMP_TARGET): Remove.
-rw-r--r--gdb/ChangeLog19
-rw-r--r--gdb/alpha-linux-tdep.c3
-rw-r--r--gdb/alpha-nat.c34
-rw-r--r--gdb/alpha-osf1-tdep.c3
-rw-r--r--gdb/alpha-tdep.c39
-rw-r--r--gdb/alpha-tdep.h5
-rw-r--r--gdb/alphafbsd-tdep.c3
-rw-r--r--gdb/alphanbsd-tdep.c3
-rw-r--r--gdb/config/alpha/nm-linux.h9
-rw-r--r--gdb/config/alpha/nm-osf.h9
10 files changed, 75 insertions, 52 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index aa51e97..d4078a3 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,22 @@
+2002-04-25 Jason Thorpe <thorpej@wasabisystems.com>
+
+ * alpha-tdep.h (gdbarch_tdep): Add jb_pc and jb_elt_size members.
+ * alpha-linux-tdep.c (alpha_linux_init_abi): Initialize
+ tdep->jb_pc and tdep->jb_elt_size.
+ * alpha-osf1-tdep.c (alpha_osf1_init_abi): Likewise.
+ * alphafbsd-tdep.c (alphafbsd_init_abi): Likewise.
+ * alphanbsd-tdep.c (alphanbsd_init_abi): Likewise.
+ * alpha-nat.c (get_longjmp_target): Remove.
+ (JB_ELEMENT_SIZE): Ditto.
+ (JB_PC): Ditto.
+ * alpha-tdep.c (alpha_get_longjmp_target): New function.
+ (alpha_gdbarch_init): Default tdep->jb_pc to -1. If the
+ OS ABI sets jb_pc to a valid value, set gdbarch_get_longjmp_target
+ to alpha_get_longjmp_target.
+ (alpha_dump_tdep): Report tdep->jb_pc and tdep->jb_elt_size.
+ * config/alpha/nm-linux.h (GET_LONGJMP_TARGET): Remove.
+ * config/alpha/nm-osf.h (GET_LONGJMP_TARGET): Remove.
+
2002-04-25 Andrew Cagney <ac131313@redhat.com>
* README: Update to GDB 5.2.
diff --git a/gdb/alpha-linux-tdep.c b/gdb/alpha-linux-tdep.c
index ed7a7c6..05a9544 100644
--- a/gdb/alpha-linux-tdep.c
+++ b/gdb/alpha-linux-tdep.c
@@ -100,6 +100,9 @@ alpha_linux_init_abi (struct gdbarch_info info,
set_gdbarch_pc_in_sigtramp (gdbarch, alpha_linux_pc_in_sigtramp);
tdep->dynamic_sigtramp_offset = alpha_linux_sigtramp_offset;
+
+ tdep->jb_pc = 2;
+ tdep->jb_elt_size = 8;
}
void
diff --git a/gdb/alpha-nat.c b/gdb/alpha-nat.c
index a21346b..580dcc0 100644
--- a/gdb/alpha-nat.c
+++ b/gdb/alpha-nat.c
@@ -41,40 +41,6 @@
static void fetch_osf_core_registers (char *, unsigned, int, CORE_ADDR);
static void fetch_elf_core_registers (char *, unsigned, int, CORE_ADDR);
-/* Size of elements in jmpbuf */
-
-#define JB_ELEMENT_SIZE 8
-
-/* The definition for JB_PC in machine/reg.h is wrong.
- And we can't get at the correct definition in setjmp.h as it is
- not always available (eg. if _POSIX_SOURCE is defined which is the
- default). As the defintion is unlikely to change (see comment
- in <setjmp.h>, define the correct value here. */
-
-#undef JB_PC
-#define JB_PC 2
-
-/* Figure out where the longjmp will land.
- We expect the first arg to be a pointer to the jmp_buf structure from which
- we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
- This routine returns true on success. */
-
-int
-get_longjmp_target (CORE_ADDR *pc)
-{
- CORE_ADDR jb_addr;
- char raw_buffer[ALPHA_MAX_REGISTER_RAW_SIZE];
-
- jb_addr = read_register (ALPHA_A0_REGNUM);
-
- if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, raw_buffer,
- sizeof (CORE_ADDR)))
- return 0;
-
- *pc = extract_address (raw_buffer, sizeof (CORE_ADDR));
- return 1;
-}
-
/* Extract the register values out of the core file and store
them where `read_register' will find them.
diff --git a/gdb/alpha-osf1-tdep.c b/gdb/alpha-osf1-tdep.c
index cba9134..be8f704 100644
--- a/gdb/alpha-osf1-tdep.c
+++ b/gdb/alpha-osf1-tdep.c
@@ -52,6 +52,9 @@ alpha_osf1_init_abi (struct gdbarch_info info,
set_gdbarch_pc_in_sigtramp (gdbarch, alpha_osf1_pc_in_sigtramp);
tdep->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame;
+
+ tdep->jb_pc = 2;
+ tdep->jb_elt_size = 8;
}
void
diff --git a/gdb/alpha-tdep.c b/gdb/alpha-tdep.c
index 4bec6bc..81c932c 100644
--- a/gdb/alpha-tdep.c
+++ b/gdb/alpha-tdep.c
@@ -78,6 +78,8 @@ static gdbarch_fix_call_dummy_ftype alpha_fix_call_dummy;
static gdbarch_init_frame_pc_first_ftype alpha_init_frame_pc_first;
static gdbarch_init_extra_frame_info_ftype alpha_init_extra_frame_info;
+static gdbarch_get_longjmp_target_ftype alpha_get_longjmp_target;
+
struct frame_extra_info
{
alpha_extra_func_info_t proc_desc;
@@ -1617,6 +1619,28 @@ alpha_extract_struct_value_address (char *regbuf)
REGISTER_RAW_SIZE (ALPHA_V0_REGNUM)));
}
+/* Figure out where the longjmp will land.
+ We expect the first arg to be a pointer to the jmp_buf structure from
+ which we extract the PC (JB_PC) that we will land at. The PC is copied
+ into the "pc". This routine returns true on success. */
+
+static int
+alpha_get_longjmp_target (CORE_ADDR *pc)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ CORE_ADDR jb_addr;
+ char raw_buffer[ALPHA_MAX_REGISTER_RAW_SIZE];
+
+ jb_addr = read_register (ALPHA_A0_REGNUM);
+
+ if (target_read_memory (jb_addr + (tdep->jb_pc * tdep->jb_elt_size),
+ raw_buffer, tdep->jb_elt_size))
+ return 0;
+
+ *pc = extract_address (raw_buffer, tdep->jb_elt_size);
+ return 1;
+}
+
/* alpha_software_single_step() is called just before we want to resume
the inferior, if we want to single-step it but there is no hardware
or kernel single-step support (NetBSD on Alpha, for example). We find
@@ -1975,6 +1999,8 @@ alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
tdep->dynamic_sigtramp_offset = NULL;
tdep->skip_sigtramp_frame = NULL;
+ tdep->jb_pc = -1; /* longjmp support not enabled by default */
+
/* Type sizes */
set_gdbarch_short_bit (gdbarch, 16);
set_gdbarch_int_bit (gdbarch, 32);
@@ -2113,6 +2139,12 @@ alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
}
}
+ /* Now that we have tuned the configuration, set a few final things
+ based on what the OS ABI has told us. */
+
+ if (tdep->jb_pc >= 0)
+ set_gdbarch_get_longjmp_target (gdbarch, alpha_get_longjmp_target);
+
return gdbarch;
}
@@ -2134,6 +2166,13 @@ alpha_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
fprintf_unfiltered (file,
"alpha_dump_tdep: vm_min_address = 0x%lx\n",
(long) tdep->vm_min_address);
+
+ fprintf_unfiltered (file,
+ "alpha_dump_tdep: jb_pc = %d\n",
+ tdep->jb_pc);
+ fprintf_unfiltered (file,
+ "alpha_dump_tdep: jb_elt_size = %ld\n",
+ (long) tdep->jb_elt_size);
}
void
diff --git a/gdb/alpha-tdep.h b/gdb/alpha-tdep.h
index a9a724d..8b1cf3e 100644
--- a/gdb/alpha-tdep.h
+++ b/gdb/alpha-tdep.h
@@ -105,6 +105,11 @@ struct gdbarch_tdep
/* If FRAME refers to a sigtramp frame, return the address of the next
frame. */
CORE_ADDR (*skip_sigtramp_frame) (struct frame_info *, CORE_ADDR);
+
+ int jb_pc; /* Offset to PC value in jump buffer.
+ If htis is negative, longjmp support
+ will be disabled. */
+ size_t jb_elt_size; /* And the size of each entry in the buf. */
};
void alpha_software_single_step (enum target_signal, int);
diff --git a/gdb/alphafbsd-tdep.c b/gdb/alphafbsd-tdep.c
index 2e52252f..3c1e64d 100644
--- a/gdb/alphafbsd-tdep.c
+++ b/gdb/alphafbsd-tdep.c
@@ -70,6 +70,9 @@ alphafbsd_init_abi (struct gdbarch_info info,
set_gdbarch_pc_in_sigtramp (gdbarch, alphafbsd_pc_in_sigtramp);
set_gdbarch_use_struct_convention (gdbarch, alphafbsd_use_struct_convention);
+
+ tdep->jb_pc = 2;
+ tdep->jb_elt_size = 8;
}
void
diff --git a/gdb/alphanbsd-tdep.c b/gdb/alphanbsd-tdep.c
index c29b3f9..33c3cd7 100644
--- a/gdb/alphanbsd-tdep.c
+++ b/gdb/alphanbsd-tdep.c
@@ -145,6 +145,9 @@ alphanbsd_init_abi (struct gdbarch_info info,
alphanbsd_solib_svr4_fetch_link_map_offsets);
tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
+
+ tdep->jb_pc = 2;
+ tdep->jb_elt_size = 8;
}
void
diff --git a/gdb/config/alpha/nm-linux.h b/gdb/config/alpha/nm-linux.h
index 5d5e945..05ac551 100644
--- a/gdb/config/alpha/nm-linux.h
+++ b/gdb/config/alpha/nm-linux.h
@@ -25,15 +25,6 @@
#include "nm-linux.h"
-/* Figure out where the longjmp will land. We expect that we have just entered
- longjmp and haven't yet setup the stack frame, so the args are still in the
- argument regs. A0_REGNUM points at the jmp_buf structure from which we
- extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
- This routine returns true on success */
-
-#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
-extern int get_longjmp_target (CORE_ADDR *);
-
/* ptrace register ``addresses'' are absolute. */
#define U_REGS_OFFSET 0
diff --git a/gdb/config/alpha/nm-osf.h b/gdb/config/alpha/nm-osf.h
index 5fc99e4..1316603 100644
--- a/gdb/config/alpha/nm-osf.h
+++ b/gdb/config/alpha/nm-osf.h
@@ -18,15 +18,6 @@
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-/* Figure out where the longjmp will land. We expect that we have just entered
- longjmp and haven't yet setup the stack frame, so the args are still in the
- argument regs. A0_REGNUM points at the jmp_buf structure from which we
- extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
- This routine returns true on success */
-
-#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
-extern int get_longjmp_target (CORE_ADDR *);
-
/* ptrace register ``addresses'' are absolute. */
#define U_REGS_OFFSET 0