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-rw-r--r--meta/recipes-devtools/gdb/gdb/0013-arc-Add-support-for-signal-frames-for-Linux-targets.patch232
1 files changed, 0 insertions, 232 deletions
diff --git a/meta/recipes-devtools/gdb/gdb/0013-arc-Add-support-for-signal-frames-for-Linux-targets.patch b/meta/recipes-devtools/gdb/gdb/0013-arc-Add-support-for-signal-frames-for-Linux-targets.patch
deleted file mode 100644
index f699a5888d..0000000000
--- a/meta/recipes-devtools/gdb/gdb/0013-arc-Add-support-for-signal-frames-for-Linux-targets.patch
+++ /dev/null
@@ -1,232 +0,0 @@
-From 16ddc17b4f403a38701e0108b02aff967900cc66 Mon Sep 17 00:00:00 2001
-From: Anton Kolesov <Anton.Kolesov@synopsys.com>
-Date: Thu, 22 Dec 2016 21:52:16 +0300
-Subject: [PATCH 2/4] arc: Add support for signal frames for Linux targets
-
-Implement functions needed to unwind signal frames on ARC Linux targets.
-
-gdb/ChangeLog
-
- * arc-linux-tdep.c (arc_linux_sc_reg_offsets): New static variable.
- (arc_linux_is_sigtramp): New function.
- (arc_linux_sigcontext_addr): Likewise.
- (arc_linux_init_osabi): Use them.
-
-Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=d4af727286e3a9f177ba11677fbd3a012d36558a]
-
-Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
-Signed-off-by: Shahab Vahedi <shahab@synopsys.com>
-Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
----
- gdb/arc-linux-tdep.c | 181 +++++++++++++++++++++++++++++++++++++++++++++++++++
- 1 file changed, 181 insertions(+)
-
-diff --git a/gdb/arc-linux-tdep.c b/gdb/arc-linux-tdep.c
-index a7bace12623..17bb3e7b276 100644
---- a/gdb/arc-linux-tdep.c
-+++ b/gdb/arc-linux-tdep.c
-@@ -33,6 +33,60 @@
-
- #define REGOFF(offset) (offset * ARC_REGISTER_SIZE)
-
-+/* arc_linux_sc_reg_offsets[i] is the offset of register i in the `struct
-+ sigcontext'. Array index is an internal GDB register number, as defined in
-+ arc-tdep.h:arc_regnum.
-+
-+ From <include/uapi/asm/sigcontext.h> and <include/uapi/asm/ptrace.h>.
-+
-+ The layout of this struct is tightly bound to "arc_regnum" enum
-+ in arc-tdep.h. Any change of order in there, must be reflected
-+ here as well. */
-+static const int arc_linux_sc_reg_offsets[] = {
-+ /* R0 - R12. */
-+ REGOFF (22), REGOFF (21), REGOFF (20), REGOFF (19),
-+ REGOFF (18), REGOFF (17), REGOFF (16), REGOFF (15),
-+ REGOFF (14), REGOFF (13), REGOFF (12), REGOFF (11),
-+ REGOFF (10),
-+
-+ /* R13 - R25. */
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER,
-+
-+ REGOFF (9), /* R26 (GP) */
-+ REGOFF (8), /* FP */
-+ REGOFF (23), /* SP */
-+ ARC_OFFSET_NO_REGISTER, /* ILINK */
-+ ARC_OFFSET_NO_REGISTER, /* R30 */
-+ REGOFF (7), /* BLINK */
-+
-+ /* R32 - R59. */
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER,
-+ ARC_OFFSET_NO_REGISTER,
-+
-+ REGOFF (4), /* LP_COUNT */
-+ ARC_OFFSET_NO_REGISTER, /* RESERVED */
-+ ARC_OFFSET_NO_REGISTER, /* LIMM */
-+ ARC_OFFSET_NO_REGISTER, /* PCL */
-+
-+ REGOFF (6), /* PC */
-+ REGOFF (5), /* STATUS32 */
-+ REGOFF (2), /* LP_START */
-+ REGOFF (3), /* LP_END */
-+ REGOFF (1), /* BTA */
-+};
-+
- /* arc_linux_core_reg_offsets[i] is the offset in the .reg section of GDB
- regnum i. Array index is an internal GDB register number, as defined in
- arc-tdep.h:arc_regnum.
-@@ -87,6 +141,127 @@ static const int arc_linux_core_reg_offsets[] = {
- REGOFF (6) /* ERET */
- };
-
-+/* Is THIS_FRAME a sigtramp function - the function that returns from
-+ signal handler into normal execution flow? This is the case if the PC is
-+ either at the start of, or in the middle of the two instructions:
-+
-+ mov r8, __NR_rt_sigreturn ; __NR_rt_sigreturn == 139
-+ trap_s 0 ; `swi' for ARC700
-+
-+ On ARC uClibc Linux this function is called __default_rt_sa_restorer.
-+
-+ Returns TRUE if this is a sigtramp frame. */
-+
-+static bool
-+arc_linux_is_sigtramp (struct frame_info *this_frame)
-+{
-+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
-+ CORE_ADDR pc = get_frame_pc (this_frame);
-+
-+ if (arc_debug)
-+ {
-+ debug_printf ("arc-linux: arc_linux_is_sigtramp, pc=%s\n",
-+ paddress(gdbarch, pc));
-+ }
-+
-+ static const gdb_byte insns_be_hs[] = {
-+ 0x20, 0x8a, 0x12, 0xc2, /* mov r8,nr_rt_sigreturn */
-+ 0x78, 0x1e /* trap_s 0 */
-+ };
-+ static const gdb_byte insns_be_700[] = {
-+ 0x20, 0x8a, 0x12, 0xc2, /* mov r8,nr_rt_sigreturn */
-+ 0x22, 0x6f, 0x00, 0x3f /* swi */
-+ };
-+
-+ gdb_byte arc_sigtramp_insns[sizeof (insns_be_700)];
-+ size_t insns_sz;
-+ if (arc_mach_is_arcv2 (gdbarch))
-+ {
-+ insns_sz = sizeof (insns_be_hs);
-+ memcpy (arc_sigtramp_insns, insns_be_hs, insns_sz);
-+ }
-+ else
-+ {
-+ insns_sz = sizeof (insns_be_700);
-+ memcpy (arc_sigtramp_insns, insns_be_700, insns_sz);
-+ }
-+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE)
-+ {
-+ /* On little endian targets, ARC code section is in what is called
-+ "middle endian", where half-words are in the big-endian order,
-+ only bytes inside the halfwords are in the little endian order.
-+ As a result it is very easy to convert big endian instruction to
-+ little endian, since it is needed to swap bytes in the halfwords,
-+ so there is no need to have information on whether that is a
-+ 4-byte instruction or 2-byte. */
-+ gdb_assert ((insns_sz % 2) == 0);
-+ for (int i = 0; i < insns_sz; i += 2)
-+ std::swap (arc_sigtramp_insns[i], arc_sigtramp_insns[i+1]);
-+ }
-+
-+ gdb_byte buf[insns_sz];
-+
-+ /* Read the memory at the PC. Since we are stopped, any breakpoint must
-+ have been removed. */
-+ if (!safe_frame_unwind_memory (this_frame, pc, buf, insns_sz))
-+ {
-+ /* Failed to unwind frame. */
-+ return FALSE;
-+ }
-+
-+ /* Is that code the sigtramp instruction sequence? */
-+ if (memcmp (buf, arc_sigtramp_insns, insns_sz) == 0)
-+ return TRUE;
-+
-+ /* No - look one instruction earlier in the code... */
-+ if (!safe_frame_unwind_memory (this_frame, pc - 4, buf, insns_sz))
-+ {
-+ /* Failed to unwind frame. */
-+ return FALSE;
-+ }
-+
-+ return (memcmp (buf, arc_sigtramp_insns, insns_sz) == 0);
-+}
-+
-+/* Get sigcontext structure of sigtramp frame - it contains saved
-+ registers of interrupted frame.
-+
-+ Stack pointer points to the rt_sigframe structure, and sigcontext can
-+ be found as in:
-+
-+ struct rt_sigframe {
-+ struct siginfo info;
-+ struct ucontext uc;
-+ ...
-+ };
-+
-+ struct ucontext {
-+ unsigned long uc_flags;
-+ struct ucontext *uc_link;
-+ stack_t uc_stack;
-+ struct sigcontext uc_mcontext;
-+ sigset_t uc_sigmask;
-+ };
-+
-+ sizeof (struct siginfo) == 0x80
-+ offsetof (struct ucontext, uc_mcontext) == 0x14
-+
-+ GDB cannot include linux headers and use offsetof () because those are
-+ target headers and GDB might be built for a different run host. There
-+ doesn't seem to be an established mechanism to figure out those offsets
-+ via gdbserver, so the only way is to hardcode values in the GDB,
-+ meaning that GDB will be broken if values will change. That seems to
-+ be a very unlikely scenario and other arches (aarch64, alpha, amd64,
-+ etc) in GDB hardcode values. */
-+
-+static CORE_ADDR
-+arc_linux_sigcontext_addr (struct frame_info *this_frame)
-+{
-+ const int ucontext_offset = 0x80;
-+ const int sigcontext_offset = 0x14;
-+ return get_frame_sp (this_frame) + ucontext_offset + sigcontext_offset;
-+}
-+
- /* Implement the "cannot_fetch_register" gdbarch method. */
-
- static int
-@@ -504,6 +679,12 @@ arc_linux_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch)
- if (arc_debug)
- debug_printf ("arc-linux: GNU/Linux OS/ABI initialization.\n");
-
-+ /* Fill in target-dependent info in ARC-private structure. */
-+ tdep->is_sigtramp = arc_linux_is_sigtramp;
-+ tdep->sigcontext_addr = arc_linux_sigcontext_addr;
-+ tdep->sc_reg_offset = arc_linux_sc_reg_offsets;
-+ tdep->sc_num_regs = ARRAY_SIZE (arc_linux_sc_reg_offsets);
-+
- /* If we are using Linux, we have in uClibc
- (libc/sysdeps/linux/arc/bits/setjmp.h):
-
---
-2.16.2
-
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-19 19:04:46 +0000