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-rw-r--r--backends/ChangeLog32
-rw-r--r--backends/Makefile.am12
-rw-r--r--backends/aarch64_init.c1
-rw-r--r--backends/aarch64_initreg.c4
-rw-r--r--backends/aarch64_unwind.c83
-rw-r--r--backends/arm_initreg.c4
-rw-r--r--backends/i386_init.c3
-rw-r--r--backends/i386_unwind.c84
-rw-r--r--backends/ppc64_init.c1
-rw-r--r--backends/ppc_attrs.c1
-rw-r--r--backends/ppc_initreg.c4
-rw-r--r--backends/s390_initreg.c4
-rw-r--r--backends/x86_64_init.c1
-rw-r--r--backends/x86_64_initreg.c2
-rw-r--r--backends/x86_64_unwind.c86
15 files changed, 307 insertions, 15 deletions
diff --git a/backends/ChangeLog b/backends/ChangeLog
index 1c561b50..1ac5bab3 100644
--- a/backends/ChangeLog
+++ b/backends/ChangeLog
@@ -1,3 +1,35 @@
+2017-04-06 Mark Wielaard <[email protected]>
+
+ * i386_unwind.c: New file.
+ * i386_init.c: Hook i386_unwind.
+ * Makefile.am (i386_SRCS): Add i386_unwind.c
+
+2017-02-09 Ulf Hermann <[email protected]>
+
+ * aarch64_unwind.c: New file
+ * Makefile.am (aarch64_SRCS): Add aarch64_unwind.c
+ * aarch64_init.c (aarch64_init): Hook aarch64_unwind
+
+2017-02-09 Ulf Hermann <[email protected]>
+
+ * x86_64_unwind.c: New file
+ * Makefile.am (x86_64_SRCS): Add x86_64_unwind.c
+ * x86_64_init.c (x86_64_init): Hook x86_64_unwind
+
+2017-04-20 Ulf Hermann <[email protected]>
+
+ * aarch64_initreg.c: Compile register initialization only on linux.
+ * arm_initreg.c: Likewise.
+ * ppc_initreg.c: Likewise.
+ * s390_initreg.c: Likewise.
+ * x86_64_initreg.c: Likewise.
+
+2017-02-15 Mark Wielaard <[email protected]>
+
+ * ppc64_init.c (ppc64_init): Add check_object_attribute HOOK.
+ * ppc_attrs.c (ppc_check_object_attribute): Add Single-precision hard
+ float.
+
2016-11-02 Mark Wielaard <[email protected]>
* i386_regs.c (i386_register_info): Add fallthrough comment.
diff --git a/backends/Makefile.am b/backends/Makefile.am
index 54ddd78f..96004dcc 100644
--- a/backends/Makefile.am
+++ b/backends/Makefile.am
@@ -52,14 +52,14 @@ libdw = ../libdw/libdw.so
# each others files.
static_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
i386_retval.c i386_regs.c i386_auxv.c i386_syscall.c \
- i386_initreg.c \
+ i386_initreg.c i386_unwind.c \
x86_64_init.c x86_64_symbol.c x86_64_corenote.c x86_64_cfi.c \
x86_64_retval.c x86_64_regs.c x86_64_syscall.c \
- x86_64_initreg.c x32_corenote.c \
+ x86_64_initreg.c x86_64_unwind.c x32_corenote.c \
ia64_init.c ia64_symbol.c ia64_regs.c ia64_retval.c \
aarch64_init.c aarch64_regs.c aarch64_symbol.c \
aarch64_corenote.c aarch64_retval.c aarch64_cfi.c \
- aarch64_initreg.c \
+ aarch64_initreg.c aarch64_unwind.c \
ppc_init.c ppc_symbol.c ppc_retval.c ppc_regs.c \
ppc_corenote.c ppc_auxv.c ppc_attrs.c ppc_syscall.c \
ppc_cfi.c ppc_initreg.c \
@@ -74,7 +74,7 @@ am_libebl_static_pic_a_OBJECTS = $(static_SRCS:.c=.os)
i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
i386_retval.c i386_regs.c i386_auxv.c i386_syscall.c \
- i386_initreg.c
+ i386_initreg.c i386_unwind.c
cpu_i386 = ../libcpu/libcpu_i386.a
libebl_i386_pic_a_SOURCES = $(i386_SRCS)
am_libebl_i386_pic_a_OBJECTS = $(i386_SRCS:.c=.os)
@@ -85,7 +85,7 @@ am_libebl_sh_pic_a_OBJECTS = $(sh_SRCS:.c=.os)
x86_64_SRCS = x86_64_init.c x86_64_symbol.c x86_64_corenote.c x86_64_cfi.c \
x86_64_retval.c x86_64_regs.c i386_auxv.c x86_64_syscall.c \
- x86_64_initreg.c x32_corenote.c
+ x86_64_initreg.c x86_64_unwind.c x32_corenote.c
cpu_x86_64 = ../libcpu/libcpu_x86_64.a
libebl_x86_64_pic_a_SOURCES = $(x86_64_SRCS)
am_libebl_x86_64_pic_a_OBJECTS = $(x86_64_SRCS:.c=.os)
@@ -106,7 +106,7 @@ am_libebl_arm_pic_a_OBJECTS = $(arm_SRCS:.c=.os)
aarch64_SRCS = aarch64_init.c aarch64_regs.c aarch64_symbol.c \
aarch64_corenote.c aarch64_retval.c aarch64_cfi.c \
- aarch64_initreg.c
+ aarch64_initreg.c aarch64_unwind.c
libebl_aarch64_pic_a_SOURCES = $(aarch64_SRCS)
am_libebl_aarch64_pic_a_OBJECTS = $(aarch64_SRCS:.c=.os)
diff --git a/backends/aarch64_init.c b/backends/aarch64_init.c
index 6395f117..08664943 100644
--- a/backends/aarch64_init.c
+++ b/backends/aarch64_init.c
@@ -63,6 +63,7 @@ aarch64_init (Elf *elf __attribute__ ((unused)),
+ ALT_FRAME_RETURN_COLUMN (used when LR isn't used) = 97 DWARF regs. */
eh->frame_nregs = 97;
HOOK (eh, set_initial_registers_tid);
+ HOOK (eh, unwind);
return MODVERSION;
}
diff --git a/backends/aarch64_initreg.c b/backends/aarch64_initreg.c
index 9706205e..daf6f375 100644
--- a/backends/aarch64_initreg.c
+++ b/backends/aarch64_initreg.c
@@ -32,7 +32,7 @@
#include "system.h"
#include <assert.h>
-#ifdef __aarch64__
+#if defined(__aarch64__) && defined(__linux__)
# include <linux/uio.h>
# include <sys/user.h>
# include <sys/ptrace.h>
@@ -51,7 +51,7 @@ aarch64_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
ebl_tid_registers_t *setfunc __attribute__ ((unused)),
void *arg __attribute__ ((unused)))
{
-#ifndef __aarch64__
+#if !defined(__aarch64__) || !defined(__linux__)
return false;
#else /* __aarch64__ */
diff --git a/backends/aarch64_unwind.c b/backends/aarch64_unwind.c
new file mode 100644
index 00000000..e0a7e96e
--- /dev/null
+++ b/backends/aarch64_unwind.c
@@ -0,0 +1,83 @@
+/* Get previous frame state for an existing frame state.
+ Copyright (C) 2016 The Qt Company Ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define BACKEND aarch64_
+#define FP_REG 29
+#define LR_REG 30
+#define SP_REG 31
+#define FP_OFFSET 0
+#define LR_OFFSET 8
+#define SP_OFFSET 16
+
+#include "libebl_CPU.h"
+
+/* There was no CFI. Maybe we happen to have a frame pointer and can unwind from that? */
+
+bool
+EBLHOOK(unwind) (Ebl *ebl __attribute__ ((unused)), Dwarf_Addr pc __attribute__ ((unused)),
+ ebl_tid_registers_t *setfunc, ebl_tid_registers_get_t *getfunc,
+ ebl_pid_memory_read_t *readfunc, void *arg,
+ bool *signal_framep __attribute__ ((unused)))
+{
+ Dwarf_Word fp, lr, sp;
+
+ if (!getfunc(LR_REG, 1, &lr, arg))
+ return false;
+
+ if (lr == 0 || !setfunc(-1, 1, &lr, arg))
+ return false;
+
+ if (!getfunc(FP_REG, 1, &fp, arg))
+ fp = 0;
+
+ if (!getfunc(SP_REG, 1, &sp, arg))
+ sp = 0;
+
+ Dwarf_Word newLr, newFp, newSp;
+
+ if (!readfunc(fp + LR_OFFSET, &newLr, arg))
+ newLr = 0;
+
+ if (!readfunc(fp + FP_OFFSET, &newFp, arg))
+ newFp = 0;
+
+ newSp = fp + SP_OFFSET;
+
+ // These are not fatal if they don't work. They will just prevent unwinding at the next frame.
+ setfunc(LR_REG, 1, &newLr, arg);
+ setfunc(FP_REG, 1, &newFp, arg);
+ setfunc(SP_REG, 1, &newSp, arg);
+
+ // If the fp is invalid, we might still have a valid lr.
+ // But if the fp is valid, then the stack should be moving in the right direction.
+ return fp == 0 || newSp > sp;
+}
diff --git a/backends/arm_initreg.c b/backends/arm_initreg.c
index a0a9be94..efcabaf6 100644
--- a/backends/arm_initreg.c
+++ b/backends/arm_initreg.c
@@ -30,6 +30,7 @@
# include <config.h>
#endif
+#ifdef __linux__
#if defined __arm__
# include <sys/types.h>
# include <sys/user.h>
@@ -45,6 +46,7 @@
# define user_regs_struct user_pt_regs
# endif
#endif
+#endif
#define BACKEND arm_
#include "libebl_CPU.h"
@@ -54,7 +56,7 @@ arm_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
ebl_tid_registers_t *setfunc __attribute__ ((unused)),
void *arg __attribute__ ((unused)))
{
-#if !defined __arm__ && !defined __aarch64__
+#if !defined(__linux__) || (!defined __arm__ && !defined __aarch64__)
return false;
#else /* __arm__ || __aarch64__ */
#if defined __arm__
diff --git a/backends/i386_init.c b/backends/i386_init.c
index 515d5ac0..fc1587a9 100644
--- a/backends/i386_init.c
+++ b/backends/i386_init.c
@@ -1,5 +1,5 @@
/* Initialization of i386 specific backend library.
- Copyright (C) 2000-2009, 2013 Red Hat, Inc.
+ Copyright (C) 2000-2009, 2013, 2017 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <[email protected]>, 2000.
@@ -65,6 +65,7 @@ i386_init (Elf *elf __attribute__ ((unused)),
/* gcc/config/ #define DWARF_FRAME_REGISTERS. For i386 it is 17, why? */
eh->frame_nregs = 9;
HOOK (eh, set_initial_registers_tid);
+ HOOK (eh, unwind);
return MODVERSION;
}
diff --git a/backends/i386_unwind.c b/backends/i386_unwind.c
new file mode 100644
index 00000000..5c9a5de0
--- /dev/null
+++ b/backends/i386_unwind.c
@@ -0,0 +1,84 @@
+/* Get previous frame state for an existing frame state using frame pointers.
+ Copyright (C) 2017 Red Hat, Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <assert.h>
+
+#define BACKEND i386_
+#include "libebl_CPU.h"
+
+/* Register numbers for frame and stack pointers. We take advantage of
+ them being next to each other when calling getfunc and setfunc. */
+#define ESP 4
+#define EBP (ESP + 1)
+
+/* Most basic frame pointer chasing with EBP as frame pointer.
+ PC = *(FP + 4), SP = FP + 8, FP = *FP. */
+bool
+i386_unwind (Ebl *ebl __attribute__ ((unused)),
+ Dwarf_Addr pc __attribute__ ((unused)),
+ ebl_tid_registers_t *setfunc, ebl_tid_registers_get_t *getfunc,
+ ebl_pid_memory_read_t *readfunc, void *arg,
+ bool *signal_framep __attribute__ ((unused)))
+{
+ /* sp = 0, fp = 1 */
+ Dwarf_Word regs[2];
+
+ /* Get current stack and frame pointers. */
+ if (! getfunc (ESP, 2, regs, arg))
+ return false;
+
+ Dwarf_Word sp = regs[0];
+ Dwarf_Word fp = regs[1];
+
+ /* Sanity check. We only support traditional stack frames. */
+ if (fp == 0 || sp == 0 || fp < sp)
+ return false;
+
+ /* Get the return address from the stack, it is our new pc. */
+ Dwarf_Word ret_addr;
+ if (! readfunc (fp + 4, &ret_addr, arg) || ret_addr == 0)
+ return false;
+
+ /* Get new sp and fp. Sanity check again. */
+ sp = fp + 8;
+ if (! readfunc (fp, &fp, arg) || fp == 0 || sp >= fp)
+ return false;
+
+ /* Set new sp, fp and pc. */
+ regs[0] = sp;
+ regs[1] = fp;
+ if (! setfunc (ESP, 2, regs, arg) || ! setfunc (-1, 1, &ret_addr, arg))
+ return false;
+
+ return true;
+}
diff --git a/backends/ppc64_init.c b/backends/ppc64_init.c
index 2ba82327..11d3a77f 100644
--- a/backends/ppc64_init.c
+++ b/backends/ppc64_init.c
@@ -67,6 +67,7 @@ ppc64_init (Elf *elf __attribute__ ((unused)),
HOOK (eh, syscall_abi);
HOOK (eh, core_note);
HOOK (eh, auxv_info);
+ HOOK (eh, check_object_attribute);
HOOK (eh, abi_cfi);
/* gcc/config/ #define DWARF_FRAME_REGISTERS. */
eh->frame_nregs = (114 - 1) + 32;
diff --git a/backends/ppc_attrs.c b/backends/ppc_attrs.c
index 612c5769..48d7129d 100644
--- a/backends/ppc_attrs.c
+++ b/backends/ppc_attrs.c
@@ -51,6 +51,7 @@ ppc_check_object_attribute (Ebl *ebl __attribute__ ((unused)),
"Hard or soft float",
"Hard float",
"Soft float",
+ "Single-precision hard float",
};
if (value < sizeof fp_kinds / sizeof fp_kinds[0])
*value_name = fp_kinds[value];
diff --git a/backends/ppc_initreg.c b/backends/ppc_initreg.c
index 64f53793..69d623b9 100644
--- a/backends/ppc_initreg.c
+++ b/backends/ppc_initreg.c
@@ -32,7 +32,7 @@
#include "system.h"
#include <stdlib.h>
-#ifdef __powerpc__
+#if defined(__powerpc__) && defined(__linux__)
# include <sys/user.h>
# include <sys/ptrace.h>
#endif
@@ -70,7 +70,7 @@ ppc_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
ebl_tid_registers_t *setfunc __attribute__ ((unused)),
void *arg __attribute__ ((unused)))
{
-#ifndef __powerpc__
+#if !defined(__powerpc__) || !defined(__linux__)
return false;
#else /* __powerpc__ */
union
diff --git a/backends/s390_initreg.c b/backends/s390_initreg.c
index b4c4b67c..011305ce 100644
--- a/backends/s390_initreg.c
+++ b/backends/s390_initreg.c
@@ -32,7 +32,7 @@
#include "system.h"
#include <assert.h>
-#ifdef __s390__
+#if defined(__s390__) && defined(__linux__)
# include <sys/user.h>
# include <asm/ptrace.h>
# include <sys/ptrace.h>
@@ -46,7 +46,7 @@ s390_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
ebl_tid_registers_t *setfunc __attribute__ ((unused)),
void *arg __attribute__ ((unused)))
{
-#ifndef __s390__
+#if !defined(__s390__) || !defined(__linux__)
return false;
#else /* __s390__ */
struct user user_regs;
diff --git a/backends/x86_64_init.c b/backends/x86_64_init.c
index cfd0158c..adfa4791 100644
--- a/backends/x86_64_init.c
+++ b/backends/x86_64_init.c
@@ -68,6 +68,7 @@ x86_64_init (Elf *elf __attribute__ ((unused)),
/* gcc/config/ #define DWARF_FRAME_REGISTERS. */
eh->frame_nregs = 17;
HOOK (eh, set_initial_registers_tid);
+ HOOK (eh, unwind);
return MODVERSION;
}
diff --git a/backends/x86_64_initreg.c b/backends/x86_64_initreg.c
index db9216ed..50e90020 100644
--- a/backends/x86_64_initreg.c
+++ b/backends/x86_64_initreg.c
@@ -31,7 +31,7 @@
#endif
#include <stdlib.h>
-#ifdef __x86_64__
+#if defined(__x86_64__) && defined(__linux__)
# include <sys/user.h>
# include <sys/ptrace.h>
#endif
diff --git a/backends/x86_64_unwind.c b/backends/x86_64_unwind.c
new file mode 100644
index 00000000..ade64c01
--- /dev/null
+++ b/backends/x86_64_unwind.c
@@ -0,0 +1,86 @@
+/* Get previous frame state for an existing frame state.
+ Copyright (C) 2016 The Qt Company Ltd.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <assert.h>
+
+#define BACKEND x86_64_
+#include "libebl_CPU.h"
+
+/* There was no CFI. Maybe we happen to have a frame pointer and can unwind from that? */
+
+bool
+x86_64_unwind (Ebl *ebl __attribute__ ((unused)),
+ Dwarf_Addr pc __attribute__ ((unused)),
+ ebl_tid_registers_t *setfunc, ebl_tid_registers_get_t *getfunc,
+ ebl_pid_memory_read_t *readfunc, void *arg,
+ bool *signal_framep __attribute__ ((unused)))
+{
+ // Register 6 is supposed to be rbp, thus the conventional frame pointer
+ const int fpReg = 6;
+ const int spReg = 7;
+
+ Dwarf_Word fp;
+ if (!getfunc(fpReg, 1, &fp, arg) || fp == 0)
+ return false;
+
+ // Try to read old sp, so that we can avoid infinite loops below
+ Dwarf_Word sp;
+ if (!getfunc(spReg, 1, &sp, arg))
+ sp = 0;
+
+ Dwarf_Word prev_fp;
+ if (!readfunc(fp, &prev_fp, arg))
+ prev_fp = 0;
+
+ Dwarf_Word ret;
+ if (!readfunc(fp + 8, &ret, arg))
+ return false;
+
+ if (!setfunc(fpReg, 1, &prev_fp, arg))
+ return false;
+
+ fp += 16; // Pop fp and return address and write result to sp
+ if (!setfunc(spReg, 1, &fp, arg))
+ return false;
+
+ if (!setfunc(-1, 1, &ret, arg))
+ return false;
+
+ // If the sp didn't move up we don't actually have a new stack
+ // frame but rather some random data that doesn't include frame
+ // pointers. Break the unwinding then.
+ if (sp >= fp)
+ return false;
+
+ return true;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-23 01:21:55 +0000