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2004-10-31 Andrew Cagney <cagney@gnu.org>

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* armnbsd-tdep.c (arm_netbsd_aout_init_abi)
	(arm_netbsd_aout_in_solib_call_trampoline): Do not set
	in_solib_call_trampoline, delete corresponding unused function.
	* vaxnbsd-tdep.c (vaxnbsd_aout_in_solib_call_trampoline)
	(vaxnbsd_aout_init_abi): Ditto.
	* sparcnbsd-tdep.c (sparcnbsd_aout_in_solib_call_trampoline)
	(sparc32nbsd_aout_init_abi): Ditto.
	* ppc-linux-tdep.c (ppc64_in_solib_call_trampoline)
	(ppc_linux_init_abi): Ditto.
	* ns32knbsd-tdep.c (ns32knbsd_aout_in_solib_call_trampoline)
	(ns32knbsd_init_abi_aout): Ditto.
	* mips-tdep.c (mips_in_call_stub, mips_gdbarch_init): Ditto.
	* mips-linux-tdep.c (mips_linux_init_abi): Ditto.
	* m68kbsd-tdep.c (m68kbsd_aout_in_solib_call_trampoline)
	(m68kbsd_aout_init_abi): Ditto.
	* i386-cygwin-tdep.c (i386_cygwin_in_solib_call_trampoline)
	(i386_cygwin_init_abi): Ditto.
	* i386bsd-tdep.c (i386bsd_aout_in_solib_call_trampoline)
	(i386bsd_init_abi): Ditto.
This commit is contained in:
Andrew Cagney 2004-10-31 20:24:32 +00:00
parent af380d6174
commit e8ce19c0cd
11 changed files with 21 additions and 160 deletions
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20
gdb/ChangeLog
View file

@ -1,5 +1,25 @@
2004-10-31 Andrew Cagney <cagney@gnu.org>
* armnbsd-tdep.c (arm_netbsd_aout_init_abi)
(arm_netbsd_aout_in_solib_call_trampoline): Do not set
in_solib_call_trampoline, delete corresponding unused function.
* vaxnbsd-tdep.c (vaxnbsd_aout_in_solib_call_trampoline)
(vaxnbsd_aout_init_abi): Ditto.
* sparcnbsd-tdep.c (sparcnbsd_aout_in_solib_call_trampoline)
(sparc32nbsd_aout_init_abi): Ditto.
* ppc-linux-tdep.c (ppc64_in_solib_call_trampoline)
(ppc_linux_init_abi): Ditto.
* ns32knbsd-tdep.c (ns32knbsd_aout_in_solib_call_trampoline)
(ns32knbsd_init_abi_aout): Ditto.
* mips-tdep.c (mips_in_call_stub, mips_gdbarch_init): Ditto.
* mips-linux-tdep.c (mips_linux_init_abi): Ditto.
* m68kbsd-tdep.c (m68kbsd_aout_in_solib_call_trampoline)
(m68kbsd_aout_init_abi): Ditto.
* i386-cygwin-tdep.c (i386_cygwin_in_solib_call_trampoline)
(i386_cygwin_init_abi): Ditto.
* i386bsd-tdep.c (i386bsd_aout_in_solib_call_trampoline)
(i386bsd_init_abi): Ditto.
* sparc-sol2-tdep.c (sparc32_sol2_init_abi): Do not set
in_solib_call_trampoline to in_plt_entry, IN_SOLIB_CALL_TRAMPOLINE
isn't used by this architecture.

9
gdb/armnbsd-tdep.c
View file

@ -39,15 +39,6 @@ static const char arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
static const char arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
static const char arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe};
static int
arm_netbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
if (strcmp (name, "_PROCEDURE_LINKAGE_TABLE_") == 0)
return 1;
return 0;
}
static void
arm_netbsd_init_abi_common (struct gdbarch_info info,
struct gdbarch *gdbarch)

8
gdb/i386-cygwin-tdep.c
View file

@ -32,19 +32,11 @@ i386_cygwin_skip_trampoline_code (CORE_ADDR pc)
return i386_pe_skip_trampoline_code (pc, NULL);
}
static int
i386_cygwin_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
return (i386_pe_skip_trampoline_code (pc, name) != 0);
}
static void
i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
set_gdbarch_in_solib_call_trampoline (gdbarch,
i386_cygwin_in_solib_call_trampoline);
set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code);
tdep->struct_return = reg_struct_return;

12
gdb/i386bsd-tdep.c
View file

@ -50,14 +50,6 @@ i386bsd_sigcontext_addr (struct frame_info *next_frame)
/* Support for shared libraries. */
/* Return non-zero if we are in a shared library trampoline code stub. */
int
i386bsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
return (name && !strcmp (name, "_DYNAMIC"));
}
/* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */
/* From <machine/signal.h>. */
@ -86,10 +78,6 @@ i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* Assume SunOS-style shared libraries. */
set_gdbarch_in_solib_call_trampoline (gdbarch,
i386bsd_aout_in_solib_call_trampoline);
tdep->jb_pc_offset = 0;
tdep->sigtramp_start = 0xfdbfdfc0;

16
gdb/m68kbsd-tdep.c
View file

@ -126,18 +126,6 @@ m68kbsd_regset_from_core_section (struct gdbarch *gdbarch,
return NULL;
}
/* Support for shared libraries. */
/* Return non-zero if we are in a shared library trampoline code stub. */
int
m68kbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
return (name && !strcmp (name, "_DYNAMIC"));
}
static void
m68kbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
@ -161,10 +149,6 @@ m68kbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
m68kbsd_init_abi (info, gdbarch);
tdep->struct_return = reg_struct_return;
/* Assume SunOS-style shared libraries. */
set_gdbarch_in_solib_call_trampoline
(gdbarch, m68kbsd_aout_in_solib_call_trampoline);
}
/* NetBSD ELF. */

4
gdb/mips-linux-tdep.c
View file

@ -1168,10 +1168,6 @@ mips_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_skip_solib_resolver (gdbarch, mips_linux_skip_resolver);
set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
/* This overrides the MIPS16 stub support from mips-tdep. But no
one uses MIPS16 on GNU/Linux yet, so this isn't much of a loss. */
set_gdbarch_in_solib_call_trampoline (gdbarch, mips_linux_in_dynsym_stub);
}
void

35
gdb/mips-tdep.c
View file

@ -4537,36 +4537,6 @@ mips_skip_trampoline_code (CORE_ADDR pc)
return 0; /* not a stub */
}
/* Return non-zero if the PC is inside a call thunk (aka stub or trampoline).
This implements the IN_SOLIB_CALL_TRAMPOLINE macro. */
static int
mips_in_call_stub (CORE_ADDR pc, char *name)
{
CORE_ADDR start_addr;
/* Find the starting address of the function containing the PC. If the
caller didn't give us a name, look it up at the same time. */
if (find_pc_partial_function (pc, name ? NULL : &name, &start_addr, NULL) ==
0)
return 0;
if (strncmp (name, "__mips16_call_stub_", 19) == 0)
{
/* If the PC is in __mips16_call_stub_{1..10}, this is a call stub. */
if (name[19] >= '0' && name[19] <= '9')
return 1;
/* If the PC at the start of __mips16_call_stub_{s,d}f_{0..10}, i.e.
before the jal instruction, this is effectively a call stub. */
else if (name[19] == 's' || name[19] == 'd')
return pc == start_addr;
}
return 0; /* not a stub */
}
/* Return non-zero if the PC is inside a return thunk (aka stub or
trampoline). */
@ -5095,10 +5065,7 @@ mips_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
that supports both shared libraries and MIPS16, we'll have to find
a better place for these. */
if (info.osabi == GDB_OSABI_UNKNOWN)
{
set_gdbarch_in_solib_call_trampoline (gdbarch, mips_in_call_stub);
set_gdbarch_in_solib_return_trampoline (gdbarch, mips_in_solib_return_trampoline);
}
set_gdbarch_in_solib_return_trampoline (gdbarch, mips_in_solib_return_trampoline);
set_gdbarch_single_step_through_delay (gdbarch, mips_single_step_through_delay);

12
gdb/ns32knbsd-tdep.c
View file

@ -25,15 +25,6 @@
#include "ns32k-tdep.h"
#include "gdb_string.h"
static int
ns32knbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
if (strcmp (name, "_DYNAMIC") == 0)
return 1;
return 0;
}
static void
ns32knbsd_init_abi_common (struct gdbarch_info info,
struct gdbarch *gdbarch)
@ -47,9 +38,6 @@ ns32knbsd_init_abi_aout (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
ns32knbsd_init_abi_common (info, gdbarch);
set_gdbarch_in_solib_call_trampoline (gdbarch,
ns32knbsd_aout_in_solib_call_trampoline);
}
static enum gdb_osabi

40
gdb/ppc-linux-tdep.c
View file

@ -685,43 +685,6 @@ static struct insn_pattern ppc64_standard_linkage[] =
#define PPC64_STANDARD_LINKAGE_LEN \
(sizeof (ppc64_standard_linkage) / sizeof (ppc64_standard_linkage[0]))
/* Recognize a 64-bit PowerPC GNU/Linux linkage function --- what GDB
calls a "solib trampoline". */
static int
ppc64_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
/* Detecting solib call trampolines on PPC64 GNU/Linux is a pain.
It's not specifically solib call trampolines that are the issue.
Any call from one function to another function that uses a
different TOC requires a trampoline, to save the caller's TOC
pointer and then load the callee's TOC. An executable or shared
library may have more than one TOC, so even intra-object calls
may require a trampoline. Since executable and shared libraries
will all have their own distinct TOCs, every inter-object call is
also an inter-TOC call, and requires a trampoline --- so "solib
call trampolines" are just a special case.
The 64-bit PowerPC GNU/Linux ABI calls these call trampolines
"linkage functions". Since they need to be near the functions
that call them, they all appear in .text, not in any special
section. The .plt section just contains an array of function
descriptors, from which the linkage functions load the callee's
entry point, TOC value, and environment pointer. So
in_plt_section is useless. The linkage functions don't have any
special linker symbols to name them, either.
The only way I can see to recognize them is to actually look at
their code. They're generated by ppc_build_one_stub and some
other functions in bfd/elf64-ppc.c, so that should show us all
the instruction sequences we need to recognize. */
unsigned int insn[PPC64_STANDARD_LINKAGE_LEN];
return insns_match_pattern (pc, ppc64_standard_linkage, insn);
}
/* When the dynamic linker is doing lazy symbol resolution, the first
call to a function in another object will go like this:
@ -1098,9 +1061,6 @@ ppc_linux_init_abi (struct gdbarch_info info,
function descriptors). */
set_gdbarch_convert_from_func_ptr_addr
(gdbarch, ppc64_linux_convert_from_func_ptr_addr);
set_gdbarch_in_solib_call_trampoline
(gdbarch, ppc64_in_solib_call_trampoline);
set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code);
/* PPC64 malloc's entry-point is called ".malloc". */

11
gdb/sparcnbsd-tdep.c
View file

@ -257,14 +257,6 @@ sparc32nbsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
}
/* Return non-zero if we are in a shared library trampoline code stub. */
static int
sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
return (name && !strcmp (name, "_DYNAMIC"));
}
static void
sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
@ -287,9 +279,6 @@ static void
sparc32nbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
sparc32nbsd_init_abi (info, gdbarch);
set_gdbarch_in_solib_call_trampoline
(gdbarch, sparcnbsd_aout_in_solib_call_trampoline);
}
static void

14
gdb/vaxnbsd-tdep.c
View file

@ -28,25 +28,11 @@
#include "gdb_string.h"
/* Support for shared libraries. */
/* Return non-zero if we are in a shared library trampoline code stub. */
int
vaxnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
return (name && !strcmp (name, "_DYNAMIC"));
}
/* NetBSD a.out. */
static void
vaxnbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
/* Assume SunOS-style shared libraries. */
set_gdbarch_in_solib_call_trampoline
(gdbarch, vaxnbsd_aout_in_solib_call_trampoline);
}
/* NetBSD ELF. */