diff options
Diffstat (limited to 'meta')
5 files changed, 972 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gdb/gdb-10.2.inc b/meta/recipes-devtools/gdb/gdb-10.2.inc index 0a7df54e9f..0d275075e6 100644 --- a/meta/recipes-devtools/gdb/gdb-10.2.inc +++ b/meta/recipes-devtools/gdb/gdb-10.2.inc | |||
@@ -15,5 +15,9 @@ SRC_URI = "${GNU_MIRROR}/gdb/gdb-${PV}.tar.xz \ | |||
15 | file://0009-resolve-restrict-keyword-conflict.patch \ | 15 | file://0009-resolve-restrict-keyword-conflict.patch \ |
16 | file://0010-Fix-invalid-sigprocmask-call.patch \ | 16 | file://0010-Fix-invalid-sigprocmask-call.patch \ |
17 | file://0011-gdbserver-ctrl-c-handling.patch \ | 17 | file://0011-gdbserver-ctrl-c-handling.patch \ |
18 | file://0012-arc-Add-support-for-signal-handlers.patch \ | ||
19 | file://0013-arc-Add-support-for-signal-frames-for-Linux-targets.patch \ | ||
20 | file://0014-arc-Take-into-account-the-REGNUM-in-supply-collect-g.patch \ | ||
21 | file://0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch \ | ||
18 | " | 22 | " |
19 | SRC_URI[sha256sum] = "aaa1223d534c9b700a8bec952d9748ee1977513f178727e1bee520ee000b4f29" | 23 | SRC_URI[sha256sum] = "aaa1223d534c9b700a8bec952d9748ee1977513f178727e1bee520ee000b4f29" |
diff --git a/meta/recipes-devtools/gdb/gdb/0012-arc-Add-support-for-signal-handlers.patch b/meta/recipes-devtools/gdb/gdb/0012-arc-Add-support-for-signal-handlers.patch new file mode 100644 index 0000000000..6a98b65766 --- /dev/null +++ b/meta/recipes-devtools/gdb/gdb/0012-arc-Add-support-for-signal-handlers.patch | |||
@@ -0,0 +1,218 @@ | |||
1 | From bfee93403b46ae4f050282b7721ba39073905c69 Mon Sep 17 00:00:00 2001 | ||
2 | From: Anton Kolesov <Anton.Kolesov@synopsys.com> | ||
3 | Date: Mon, 22 Aug 2016 19:39:46 +0300 | ||
4 | Subject: [PATCH 1/4] arc: Add support for signal handlers | ||
5 | |||
6 | This patch adds the necessary infrastructure to handle signal frames for | ||
7 | ARC architecture. It is fairly similar to what any other architecture | ||
8 | would have. Linux specific parts will be in a separate patch. | ||
9 | |||
10 | v2 [1]: | ||
11 | - Make the logic of "arc_sigtramp_frame_sniffer ()" simpler. | ||
12 | |||
13 | [1] Tom's remark for the first version | ||
14 | https://sourceware.org/pipermail/gdb-patches/2020-November/173221.html | ||
15 | |||
16 | gdb/ChangeLog: | ||
17 | |||
18 | * arc-tdep.c (arc_make_sigtramp_frame_cache): New function. | ||
19 | (arc_sigtramp_frame_this_id): Likewise. | ||
20 | (arc_sigtramp_frame_prev_register): Likewise. | ||
21 | (arc_sigtramp_frame_sniffer): Likewise. | ||
22 | (arc_siftramp_frame_unwind): New global variable. | ||
23 | (arc_gdbarch_init): Use sigtramp capabilities. | ||
24 | (arc_dump_tdep): Print sigtramp fields. | ||
25 | * arc-tdep.h (gdbarch_tdep): Add sigtramp fields. | ||
26 | |||
27 | Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=b4e3cd0440109d0a5552d3313ccbd35c8103335b] | ||
28 | |||
29 | Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com> | ||
30 | Signed-off-by: Shahab Vahedi <shahab@synopsys.com> | ||
31 | Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> | ||
32 | --- | ||
33 | gdb/arc-tdep.c | 123 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | ||
34 | gdb/arc-tdep.h | 13 ++++++ | ||
35 | 2 files changed, 136 insertions(+) | ||
36 | |||
37 | diff --git a/gdb/arc-tdep.c b/gdb/arc-tdep.c | ||
38 | index 93e2fd88a9a..3356252525d 100644 | ||
39 | --- a/gdb/arc-tdep.c | ||
40 | +++ b/gdb/arc-tdep.c | ||
41 | @@ -1843,6 +1843,104 @@ arc_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum, | ||
42 | reg->how = DWARF2_FRAME_REG_CFA; | ||
43 | } | ||
44 | |||
45 | +/* Signal trampoline frame unwinder. Allows frame unwinding to happen | ||
46 | + from within signal handlers. */ | ||
47 | + | ||
48 | +static struct arc_frame_cache * | ||
49 | +arc_make_sigtramp_frame_cache (struct frame_info *this_frame) | ||
50 | +{ | ||
51 | + if (arc_debug) | ||
52 | + debug_printf ("arc: sigtramp_frame_cache\n"); | ||
53 | + | ||
54 | + struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame)); | ||
55 | + | ||
56 | + /* Allocate new frame cache instance and space for saved register info. */ | ||
57 | + struct arc_frame_cache *cache = FRAME_OBSTACK_ZALLOC (struct arc_frame_cache); | ||
58 | + cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); | ||
59 | + | ||
60 | + /* Get the stack pointer and use it as the frame base. */ | ||
61 | + cache->prev_sp = arc_frame_base_address (this_frame, NULL); | ||
62 | + | ||
63 | + /* If the ARC-private target-dependent info doesn't have a table of | ||
64 | + offsets of saved register contents within an OS signal context | ||
65 | + structure, then there is nothing to analyze. */ | ||
66 | + if (tdep->sc_reg_offset == NULL) | ||
67 | + return cache; | ||
68 | + | ||
69 | + /* Find the address of the sigcontext structure. */ | ||
70 | + CORE_ADDR addr = tdep->sigcontext_addr (this_frame); | ||
71 | + | ||
72 | + /* For each register, if its contents have been saved within the | ||
73 | + sigcontext structure, determine the address of those contents. */ | ||
74 | + gdb_assert (tdep->sc_num_regs <= (ARC_LAST_REGNUM + 1)); | ||
75 | + for (int i = 0; i < tdep->sc_num_regs; i++) | ||
76 | + { | ||
77 | + if (tdep->sc_reg_offset[i] != ARC_OFFSET_NO_REGISTER) | ||
78 | + cache->saved_regs[i].addr = addr + tdep->sc_reg_offset[i]; | ||
79 | + } | ||
80 | + | ||
81 | + return cache; | ||
82 | +} | ||
83 | + | ||
84 | +/* Implement the "this_id" frame_unwind method for signal trampoline | ||
85 | + frames. */ | ||
86 | + | ||
87 | +static void | ||
88 | +arc_sigtramp_frame_this_id (struct frame_info *this_frame, | ||
89 | + void **this_cache, struct frame_id *this_id) | ||
90 | +{ | ||
91 | + if (arc_debug) | ||
92 | + debug_printf ("arc: sigtramp_frame_this_id\n"); | ||
93 | + | ||
94 | + if (*this_cache == NULL) | ||
95 | + *this_cache = arc_make_sigtramp_frame_cache (this_frame); | ||
96 | + | ||
97 | + struct gdbarch *gdbarch = get_frame_arch (this_frame); | ||
98 | + struct arc_frame_cache *cache = (struct arc_frame_cache *) *this_cache; | ||
99 | + CORE_ADDR stack_addr = cache->prev_sp; | ||
100 | + CORE_ADDR code_addr | ||
101 | + = get_frame_register_unsigned (this_frame, gdbarch_pc_regnum (gdbarch)); | ||
102 | + *this_id = frame_id_build (stack_addr, code_addr); | ||
103 | +} | ||
104 | + | ||
105 | +/* Get a register from a signal handler frame. */ | ||
106 | + | ||
107 | +static struct value * | ||
108 | +arc_sigtramp_frame_prev_register (struct frame_info *this_frame, | ||
109 | + void **this_cache, int regnum) | ||
110 | +{ | ||
111 | + if (arc_debug) | ||
112 | + debug_printf ("arc: sigtramp_frame_prev_register (regnum = %d)\n", regnum); | ||
113 | + | ||
114 | + /* Make sure we've initialized the cache. */ | ||
115 | + if (*this_cache == NULL) | ||
116 | + *this_cache = arc_make_sigtramp_frame_cache (this_frame); | ||
117 | + | ||
118 | + struct arc_frame_cache *cache = (struct arc_frame_cache *) *this_cache; | ||
119 | + return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum); | ||
120 | +} | ||
121 | + | ||
122 | +/* Frame sniffer for signal handler frame. Only recognize a frame if we | ||
123 | + have a sigcontext_addr handler in the target dependency. */ | ||
124 | + | ||
125 | +static int | ||
126 | +arc_sigtramp_frame_sniffer (const struct frame_unwind *self, | ||
127 | + struct frame_info *this_frame, | ||
128 | + void **this_cache) | ||
129 | +{ | ||
130 | + struct gdbarch_tdep *tdep; | ||
131 | + | ||
132 | + if (arc_debug) | ||
133 | + debug_printf ("arc: sigtramp_frame_sniffer\n"); | ||
134 | + | ||
135 | + tdep = gdbarch_tdep (get_frame_arch (this_frame)); | ||
136 | + | ||
137 | + /* If we have a sigcontext_addr handler, then just return 1 (same as the | ||
138 | + "default_frame_sniffer ()"). */ | ||
139 | + return (tdep->sigcontext_addr != NULL && tdep->is_sigtramp != NULL | ||
140 | + && tdep->is_sigtramp (this_frame)); | ||
141 | +} | ||
142 | + | ||
143 | /* Structure defining the ARC ordinary frame unwind functions. Since we are | ||
144 | the fallback unwinder, we use the default frame sniffer, which always | ||
145 | accepts the frame. */ | ||
146 | @@ -1858,6 +1956,21 @@ static const struct frame_unwind arc_frame_unwind = { | ||
147 | NULL | ||
148 | }; | ||
149 | |||
150 | +/* Structure defining the ARC signal frame unwind functions. Custom | ||
151 | + sniffer is used, because this frame must be accepted only in the right | ||
152 | + context. */ | ||
153 | + | ||
154 | +static const struct frame_unwind arc_sigtramp_frame_unwind = { | ||
155 | + SIGTRAMP_FRAME, | ||
156 | + default_frame_unwind_stop_reason, | ||
157 | + arc_sigtramp_frame_this_id, | ||
158 | + arc_sigtramp_frame_prev_register, | ||
159 | + NULL, | ||
160 | + arc_sigtramp_frame_sniffer, | ||
161 | + NULL, | ||
162 | + NULL | ||
163 | +}; | ||
164 | + | ||
165 | |||
166 | static const struct frame_base arc_normal_base = { | ||
167 | &arc_frame_unwind, | ||
168 | @@ -2272,6 +2385,7 @@ arc_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | ||
169 | /* Frame unwinders and sniffers. */ | ||
170 | dwarf2_frame_set_init_reg (gdbarch, arc_dwarf2_frame_init_reg); | ||
171 | dwarf2_append_unwinders (gdbarch); | ||
172 | + frame_unwind_append_unwinder (gdbarch, &arc_sigtramp_frame_unwind); | ||
173 | frame_unwind_append_unwinder (gdbarch, &arc_frame_unwind); | ||
174 | frame_base_set_default (gdbarch, &arc_normal_base); | ||
175 | |||
176 | @@ -2350,6 +2464,15 @@ arc_dump_tdep (struct gdbarch *gdbarch, struct ui_file *file) | ||
177 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | ||
178 | |||
179 | fprintf_unfiltered (file, "arc_dump_tdep: jb_pc = %i\n", tdep->jb_pc); | ||
180 | + | ||
181 | + fprintf_unfiltered (file, "arc_dump_tdep: is_sigtramp = <%s>\n", | ||
182 | + host_address_to_string (tdep->is_sigtramp)); | ||
183 | + fprintf_unfiltered (file, "arc_dump_tdep: sigcontext_addr = <%s>\n", | ||
184 | + host_address_to_string (tdep->sigcontext_addr)); | ||
185 | + fprintf_unfiltered (file, "arc_dump_tdep: sc_reg_offset = <%s>\n", | ||
186 | + host_address_to_string (tdep->sc_reg_offset)); | ||
187 | + fprintf_unfiltered (file, "arc_dump_tdep: sc_num_regs = %d\n", | ||
188 | + tdep->sc_num_regs); | ||
189 | } | ||
190 | |||
191 | /* This command accepts single argument - address of instruction to | ||
192 | diff --git a/gdb/arc-tdep.h b/gdb/arc-tdep.h | ||
193 | index 50b14905134..70fc3d95c48 100644 | ||
194 | --- a/gdb/arc-tdep.h | ||
195 | +++ b/gdb/arc-tdep.h | ||
196 | @@ -124,6 +124,19 @@ struct gdbarch_tdep | ||
197 | |||
198 | /* Whether target has hardware (aka zero-delay) loops. */ | ||
199 | bool has_hw_loops; | ||
200 | + | ||
201 | + /* Detect sigtramp. */ | ||
202 | + bool (*is_sigtramp) (struct frame_info *); | ||
203 | + | ||
204 | + /* Get address of sigcontext for sigtramp. */ | ||
205 | + CORE_ADDR (*sigcontext_addr) (struct frame_info *); | ||
206 | + | ||
207 | + /* Offset of registers in `struct sigcontext'. */ | ||
208 | + const int *sc_reg_offset; | ||
209 | + | ||
210 | + /* Number of registers in sc_reg_offsets. Most likely a ARC_LAST_REGNUM, | ||
211 | + but in theory it could be less, so it is kept separate. */ | ||
212 | + int sc_num_regs; | ||
213 | }; | ||
214 | |||
215 | /* Utility functions used by other ARC-specific modules. */ | ||
216 | -- | ||
217 | 2.16.2 | ||
218 | |||
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 new file mode 100644 index 0000000000..f699a5888d --- /dev/null +++ b/meta/recipes-devtools/gdb/gdb/0013-arc-Add-support-for-signal-frames-for-Linux-targets.patch | |||
@@ -0,0 +1,232 @@ | |||
1 | From 16ddc17b4f403a38701e0108b02aff967900cc66 Mon Sep 17 00:00:00 2001 | ||
2 | From: Anton Kolesov <Anton.Kolesov@synopsys.com> | ||
3 | Date: Thu, 22 Dec 2016 21:52:16 +0300 | ||
4 | Subject: [PATCH 2/4] arc: Add support for signal frames for Linux targets | ||
5 | |||
6 | Implement functions needed to unwind signal frames on ARC Linux targets. | ||
7 | |||
8 | gdb/ChangeLog | ||
9 | |||
10 | * arc-linux-tdep.c (arc_linux_sc_reg_offsets): New static variable. | ||
11 | (arc_linux_is_sigtramp): New function. | ||
12 | (arc_linux_sigcontext_addr): Likewise. | ||
13 | (arc_linux_init_osabi): Use them. | ||
14 | |||
15 | Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=d4af727286e3a9f177ba11677fbd3a012d36558a] | ||
16 | |||
17 | Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com> | ||
18 | Signed-off-by: Shahab Vahedi <shahab@synopsys.com> | ||
19 | Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> | ||
20 | --- | ||
21 | gdb/arc-linux-tdep.c | 181 +++++++++++++++++++++++++++++++++++++++++++++++++++ | ||
22 | 1 file changed, 181 insertions(+) | ||
23 | |||
24 | diff --git a/gdb/arc-linux-tdep.c b/gdb/arc-linux-tdep.c | ||
25 | index a7bace12623..17bb3e7b276 100644 | ||
26 | --- a/gdb/arc-linux-tdep.c | ||
27 | +++ b/gdb/arc-linux-tdep.c | ||
28 | @@ -33,6 +33,60 @@ | ||
29 | |||
30 | #define REGOFF(offset) (offset * ARC_REGISTER_SIZE) | ||
31 | |||
32 | +/* arc_linux_sc_reg_offsets[i] is the offset of register i in the `struct | ||
33 | + sigcontext'. Array index is an internal GDB register number, as defined in | ||
34 | + arc-tdep.h:arc_regnum. | ||
35 | + | ||
36 | + From <include/uapi/asm/sigcontext.h> and <include/uapi/asm/ptrace.h>. | ||
37 | + | ||
38 | + The layout of this struct is tightly bound to "arc_regnum" enum | ||
39 | + in arc-tdep.h. Any change of order in there, must be reflected | ||
40 | + here as well. */ | ||
41 | +static const int arc_linux_sc_reg_offsets[] = { | ||
42 | + /* R0 - R12. */ | ||
43 | + REGOFF (22), REGOFF (21), REGOFF (20), REGOFF (19), | ||
44 | + REGOFF (18), REGOFF (17), REGOFF (16), REGOFF (15), | ||
45 | + REGOFF (14), REGOFF (13), REGOFF (12), REGOFF (11), | ||
46 | + REGOFF (10), | ||
47 | + | ||
48 | + /* R13 - R25. */ | ||
49 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
50 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
51 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
52 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
53 | + ARC_OFFSET_NO_REGISTER, | ||
54 | + | ||
55 | + REGOFF (9), /* R26 (GP) */ | ||
56 | + REGOFF (8), /* FP */ | ||
57 | + REGOFF (23), /* SP */ | ||
58 | + ARC_OFFSET_NO_REGISTER, /* ILINK */ | ||
59 | + ARC_OFFSET_NO_REGISTER, /* R30 */ | ||
60 | + REGOFF (7), /* BLINK */ | ||
61 | + | ||
62 | + /* R32 - R59. */ | ||
63 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
64 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
65 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
66 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
67 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
68 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
69 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
70 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
71 | + ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, ARC_OFFSET_NO_REGISTER, | ||
72 | + ARC_OFFSET_NO_REGISTER, | ||
73 | + | ||
74 | + REGOFF (4), /* LP_COUNT */ | ||
75 | + ARC_OFFSET_NO_REGISTER, /* RESERVED */ | ||
76 | + ARC_OFFSET_NO_REGISTER, /* LIMM */ | ||
77 | + ARC_OFFSET_NO_REGISTER, /* PCL */ | ||
78 | + | ||
79 | + REGOFF (6), /* PC */ | ||
80 | + REGOFF (5), /* STATUS32 */ | ||
81 | + REGOFF (2), /* LP_START */ | ||
82 | + REGOFF (3), /* LP_END */ | ||
83 | + REGOFF (1), /* BTA */ | ||
84 | +}; | ||
85 | + | ||
86 | /* arc_linux_core_reg_offsets[i] is the offset in the .reg section of GDB | ||
87 | regnum i. Array index is an internal GDB register number, as defined in | ||
88 | arc-tdep.h:arc_regnum. | ||
89 | @@ -87,6 +141,127 @@ static const int arc_linux_core_reg_offsets[] = { | ||
90 | REGOFF (6) /* ERET */ | ||
91 | }; | ||
92 | |||
93 | +/* Is THIS_FRAME a sigtramp function - the function that returns from | ||
94 | + signal handler into normal execution flow? This is the case if the PC is | ||
95 | + either at the start of, or in the middle of the two instructions: | ||
96 | + | ||
97 | + mov r8, __NR_rt_sigreturn ; __NR_rt_sigreturn == 139 | ||
98 | + trap_s 0 ; `swi' for ARC700 | ||
99 | + | ||
100 | + On ARC uClibc Linux this function is called __default_rt_sa_restorer. | ||
101 | + | ||
102 | + Returns TRUE if this is a sigtramp frame. */ | ||
103 | + | ||
104 | +static bool | ||
105 | +arc_linux_is_sigtramp (struct frame_info *this_frame) | ||
106 | +{ | ||
107 | + struct gdbarch *gdbarch = get_frame_arch (this_frame); | ||
108 | + CORE_ADDR pc = get_frame_pc (this_frame); | ||
109 | + | ||
110 | + if (arc_debug) | ||
111 | + { | ||
112 | + debug_printf ("arc-linux: arc_linux_is_sigtramp, pc=%s\n", | ||
113 | + paddress(gdbarch, pc)); | ||
114 | + } | ||
115 | + | ||
116 | + static const gdb_byte insns_be_hs[] = { | ||
117 | + 0x20, 0x8a, 0x12, 0xc2, /* mov r8,nr_rt_sigreturn */ | ||
118 | + 0x78, 0x1e /* trap_s 0 */ | ||
119 | + }; | ||
120 | + static const gdb_byte insns_be_700[] = { | ||
121 | + 0x20, 0x8a, 0x12, 0xc2, /* mov r8,nr_rt_sigreturn */ | ||
122 | + 0x22, 0x6f, 0x00, 0x3f /* swi */ | ||
123 | + }; | ||
124 | + | ||
125 | + gdb_byte arc_sigtramp_insns[sizeof (insns_be_700)]; | ||
126 | + size_t insns_sz; | ||
127 | + if (arc_mach_is_arcv2 (gdbarch)) | ||
128 | + { | ||
129 | + insns_sz = sizeof (insns_be_hs); | ||
130 | + memcpy (arc_sigtramp_insns, insns_be_hs, insns_sz); | ||
131 | + } | ||
132 | + else | ||
133 | + { | ||
134 | + insns_sz = sizeof (insns_be_700); | ||
135 | + memcpy (arc_sigtramp_insns, insns_be_700, insns_sz); | ||
136 | + } | ||
137 | + if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) | ||
138 | + { | ||
139 | + /* On little endian targets, ARC code section is in what is called | ||
140 | + "middle endian", where half-words are in the big-endian order, | ||
141 | + only bytes inside the halfwords are in the little endian order. | ||
142 | + As a result it is very easy to convert big endian instruction to | ||
143 | + little endian, since it is needed to swap bytes in the halfwords, | ||
144 | + so there is no need to have information on whether that is a | ||
145 | + 4-byte instruction or 2-byte. */ | ||
146 | + gdb_assert ((insns_sz % 2) == 0); | ||
147 | + for (int i = 0; i < insns_sz; i += 2) | ||
148 | + std::swap (arc_sigtramp_insns[i], arc_sigtramp_insns[i+1]); | ||
149 | + } | ||
150 | + | ||
151 | + gdb_byte buf[insns_sz]; | ||
152 | + | ||
153 | + /* Read the memory at the PC. Since we are stopped, any breakpoint must | ||
154 | + have been removed. */ | ||
155 | + if (!safe_frame_unwind_memory (this_frame, pc, buf, insns_sz)) | ||
156 | + { | ||
157 | + /* Failed to unwind frame. */ | ||
158 | + return FALSE; | ||
159 | + } | ||
160 | + | ||
161 | + /* Is that code the sigtramp instruction sequence? */ | ||
162 | + if (memcmp (buf, arc_sigtramp_insns, insns_sz) == 0) | ||
163 | + return TRUE; | ||
164 | + | ||
165 | + /* No - look one instruction earlier in the code... */ | ||
166 | + if (!safe_frame_unwind_memory (this_frame, pc - 4, buf, insns_sz)) | ||
167 | + { | ||
168 | + /* Failed to unwind frame. */ | ||
169 | + return FALSE; | ||
170 | + } | ||
171 | + | ||
172 | + return (memcmp (buf, arc_sigtramp_insns, insns_sz) == 0); | ||
173 | +} | ||
174 | + | ||
175 | +/* Get sigcontext structure of sigtramp frame - it contains saved | ||
176 | + registers of interrupted frame. | ||
177 | + | ||
178 | + Stack pointer points to the rt_sigframe structure, and sigcontext can | ||
179 | + be found as in: | ||
180 | + | ||
181 | + struct rt_sigframe { | ||
182 | + struct siginfo info; | ||
183 | + struct ucontext uc; | ||
184 | + ... | ||
185 | + }; | ||
186 | + | ||
187 | + struct ucontext { | ||
188 | + unsigned long uc_flags; | ||
189 | + struct ucontext *uc_link; | ||
190 | + stack_t uc_stack; | ||
191 | + struct sigcontext uc_mcontext; | ||
192 | + sigset_t uc_sigmask; | ||
193 | + }; | ||
194 | + | ||
195 | + sizeof (struct siginfo) == 0x80 | ||
196 | + offsetof (struct ucontext, uc_mcontext) == 0x14 | ||
197 | + | ||
198 | + GDB cannot include linux headers and use offsetof () because those are | ||
199 | + target headers and GDB might be built for a different run host. There | ||
200 | + doesn't seem to be an established mechanism to figure out those offsets | ||
201 | + via gdbserver, so the only way is to hardcode values in the GDB, | ||
202 | + meaning that GDB will be broken if values will change. That seems to | ||
203 | + be a very unlikely scenario and other arches (aarch64, alpha, amd64, | ||
204 | + etc) in GDB hardcode values. */ | ||
205 | + | ||
206 | +static CORE_ADDR | ||
207 | +arc_linux_sigcontext_addr (struct frame_info *this_frame) | ||
208 | +{ | ||
209 | + const int ucontext_offset = 0x80; | ||
210 | + const int sigcontext_offset = 0x14; | ||
211 | + return get_frame_sp (this_frame) + ucontext_offset + sigcontext_offset; | ||
212 | +} | ||
213 | + | ||
214 | /* Implement the "cannot_fetch_register" gdbarch method. */ | ||
215 | |||
216 | static int | ||
217 | @@ -504,6 +679,12 @@ arc_linux_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) | ||
218 | if (arc_debug) | ||
219 | debug_printf ("arc-linux: GNU/Linux OS/ABI initialization.\n"); | ||
220 | |||
221 | + /* Fill in target-dependent info in ARC-private structure. */ | ||
222 | + tdep->is_sigtramp = arc_linux_is_sigtramp; | ||
223 | + tdep->sigcontext_addr = arc_linux_sigcontext_addr; | ||
224 | + tdep->sc_reg_offset = arc_linux_sc_reg_offsets; | ||
225 | + tdep->sc_num_regs = ARRAY_SIZE (arc_linux_sc_reg_offsets); | ||
226 | + | ||
227 | /* If we are using Linux, we have in uClibc | ||
228 | (libc/sysdeps/linux/arc/bits/setjmp.h): | ||
229 | |||
230 | -- | ||
231 | 2.16.2 | ||
232 | |||
diff --git a/meta/recipes-devtools/gdb/gdb/0014-arc-Take-into-account-the-REGNUM-in-supply-collect-g.patch b/meta/recipes-devtools/gdb/gdb/0014-arc-Take-into-account-the-REGNUM-in-supply-collect-g.patch new file mode 100644 index 0000000000..a7256065cc --- /dev/null +++ b/meta/recipes-devtools/gdb/gdb/0014-arc-Take-into-account-the-REGNUM-in-supply-collect-g.patch | |||
@@ -0,0 +1,104 @@ | |||
1 | From 5eb97d5e92ad23ee81cebc1ebd5eafe0aa55fc17 Mon Sep 17 00:00:00 2001 | ||
2 | From: Shahab Vahedi <shahab@synopsys.com> | ||
3 | Date: Tue, 10 Nov 2020 19:34:57 +0100 | ||
4 | Subject: [PATCH 3/4] arc: Take into account the REGNUM in supply/collect gdb | ||
5 | hooks | ||
6 | |||
7 | All the arc_linux_supply_*() target operations and the | ||
8 | arc_linux_collect_v2_regset() in arc-linux-tdep.c were | ||
9 | supplying/collecting all the registers in regcache as if the | ||
10 | REGNUM was set to -1. | ||
11 | |||
12 | The more efficient behavior is to examine the REGNUM and act | ||
13 | accordingly. That is what this patch does. | ||
14 | |||
15 | gdb/ChangeLog: | ||
16 | |||
17 | * arc-linux-tdep.c (supply_register): New. | ||
18 | (arc_linux_supply_gregset, arc_linux_supply_v2_regset, | ||
19 | arc_linux_collect_v2_regset): Consider REGNUM. | ||
20 | |||
21 | Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=46023bbe81355230b4e7b76d3084337823d02362] | ||
22 | |||
23 | Signed-off-by: Shahab Vahedi <shahab@synopsys.com> | ||
24 | Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> | ||
25 | --- | ||
26 | gdb/arc-linux-tdep.c | 41 ++++++++++++++++++++++++++++++++--------- | ||
27 | 1 file changed, 32 insertions(+), 9 deletions(-) | ||
28 | |||
29 | diff --git a/gdb/arc-linux-tdep.c b/gdb/arc-linux-tdep.c | ||
30 | index 17bb3e7b276..e83d82b6f5c 100644 | ||
31 | --- a/gdb/arc-linux-tdep.c | ||
32 | +++ b/gdb/arc-linux-tdep.c | ||
33 | @@ -535,6 +535,18 @@ arc_linux_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) | ||
34 | } | ||
35 | } | ||
36 | |||
37 | +/* Populate REGCACHE with register REGNUM from BUF. */ | ||
38 | + | ||
39 | +static void | ||
40 | +supply_register (struct regcache *regcache, int regnum, const gdb_byte *buf) | ||
41 | +{ | ||
42 | + /* Skip non-existing registers. */ | ||
43 | + if ((arc_linux_core_reg_offsets[regnum] == ARC_OFFSET_NO_REGISTER)) | ||
44 | + return; | ||
45 | + | ||
46 | + regcache->raw_supply (regnum, buf + arc_linux_core_reg_offsets[regnum]); | ||
47 | +} | ||
48 | + | ||
49 | void | ||
50 | arc_linux_supply_gregset (const struct regset *regset, | ||
51 | struct regcache *regcache, | ||
52 | @@ -545,9 +557,14 @@ arc_linux_supply_gregset (const struct regset *regset, | ||
53 | |||
54 | const bfd_byte *buf = (const bfd_byte *) gregs; | ||
55 | |||
56 | - for (int reg = 0; reg <= ARC_LAST_REGNUM; reg++) | ||
57 | - if (arc_linux_core_reg_offsets[reg] != ARC_OFFSET_NO_REGISTER) | ||
58 | - regcache->raw_supply (reg, buf + arc_linux_core_reg_offsets[reg]); | ||
59 | + /* regnum == -1 means writing all the registers. */ | ||
60 | + if (regnum == -1) | ||
61 | + for (int reg = 0; reg <= ARC_LAST_REGNUM; reg++) | ||
62 | + supply_register (regcache, reg, buf); | ||
63 | + else if (regnum <= ARC_LAST_REGNUM) | ||
64 | + supply_register (regcache, regnum, buf); | ||
65 | + else | ||
66 | + gdb_assert_not_reached ("Invalid regnum in arc_linux_supply_gregset."); | ||
67 | } | ||
68 | |||
69 | void | ||
70 | @@ -558,9 +575,12 @@ arc_linux_supply_v2_regset (const struct regset *regset, | ||
71 | const bfd_byte *buf = (const bfd_byte *) v2_regs; | ||
72 | |||
73 | /* user_regs_arcv2 is defined in linux arch/arc/include/uapi/asm/ptrace.h. */ | ||
74 | - regcache->raw_supply (ARC_R30_REGNUM, buf); | ||
75 | - regcache->raw_supply (ARC_R58_REGNUM, buf + REGOFF (1)); | ||
76 | - regcache->raw_supply (ARC_R59_REGNUM, buf + REGOFF (2)); | ||
77 | + if (regnum == -1 || regnum == ARC_R30_REGNUM) | ||
78 | + regcache->raw_supply (ARC_R30_REGNUM, buf); | ||
79 | + if (regnum == -1 || regnum == ARC_R58_REGNUM) | ||
80 | + regcache->raw_supply (ARC_R58_REGNUM, buf + REGOFF (1)); | ||
81 | + if (regnum == -1 || regnum == ARC_R59_REGNUM) | ||
82 | + regcache->raw_supply (ARC_R59_REGNUM, buf + REGOFF (2)); | ||
83 | } | ||
84 | |||
85 | /* Populate BUF with register REGNUM from the REGCACHE. */ | ||
86 | @@ -618,9 +638,12 @@ arc_linux_collect_v2_regset (const struct regset *regset, | ||
87 | { | ||
88 | bfd_byte *buf = (bfd_byte *) v2_regs; | ||
89 | |||
90 | - regcache->raw_collect (ARC_R30_REGNUM, buf); | ||
91 | - regcache->raw_collect (ARC_R58_REGNUM, buf + REGOFF (1)); | ||
92 | - regcache->raw_collect (ARC_R59_REGNUM, buf + REGOFF (2)); | ||
93 | + if (regnum == -1 || regnum == ARC_R30_REGNUM) | ||
94 | + regcache->raw_collect (ARC_R30_REGNUM, buf); | ||
95 | + if (regnum == -1 || regnum == ARC_R58_REGNUM) | ||
96 | + regcache->raw_collect (ARC_R58_REGNUM, buf + REGOFF (1)); | ||
97 | + if (regnum == -1 || regnum == ARC_R59_REGNUM) | ||
98 | + regcache->raw_collect (ARC_R59_REGNUM, buf + REGOFF (2)); | ||
99 | } | ||
100 | |||
101 | /* Linux regset definitions. */ | ||
102 | -- | ||
103 | 2.16.2 | ||
104 | |||
diff --git a/meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch b/meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch new file mode 100644 index 0000000000..31cf0b0be2 --- /dev/null +++ b/meta/recipes-devtools/gdb/gdb/0015-gdb-Add-native-support-for-ARC-in-GNU-Linux.patch | |||
@@ -0,0 +1,414 @@ | |||
1 | From 32b366249fd42d74cbc4a91039431554ebadcfd0 Mon Sep 17 00:00:00 2001 | ||
2 | From: Anton Kolesov <anton.kolesov@synopsys.com> | ||
3 | Date: Fri, 14 Feb 2014 11:56:23 +0400 | ||
4 | Subject: [PATCH 4/4] gdb: Add native support for ARC in GNU/Linux | ||
5 | |||
6 | With this patch in place it is possible to build a GDB that | ||
7 | can run on ARC (GNU/Linux) hosts for debugging ARC targets. | ||
8 | |||
9 | The "arc-linux-nat.c" is a rather small one that mostly deals | ||
10 | with registers and a few thread related hooks. | ||
11 | |||
12 | v2 [1]: | ||
13 | - Remove "void" from the input of "_initialize_arc_linux_nat ()" | ||
14 | |||
15 | [1] Tom's remark after the first patch | ||
16 | https://sourceware.org/pipermail/gdb-patches/2020-November/173223.html | ||
17 | |||
18 | gdb/ChangeLog: | ||
19 | |||
20 | * Makefile.in (ALLDEPFILES): Add arc-linux-nat.c. | ||
21 | * configure.host (host to gdb names): Add arc*-*-linux*. | ||
22 | * configure.nat (gdb_host_cpu): Add arc. | ||
23 | * arc-linux-nat.c: New. | ||
24 | |||
25 | Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=04c9f85efcd8df5fc482ce97c0104cc7dd5d19e6] | ||
26 | |||
27 | Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com> | ||
28 | Signed-off-by: Shahab Vahedi <shahab@synopsys.com> | ||
29 | Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> | ||
30 | --- | ||
31 | gdb/Makefile.in | 1 + | ||
32 | gdb/arc-linux-nat.c | 320 ++++++++++++++++++++++++++++++++++++++++++++++++++++ | ||
33 | gdb/configure.host | 3 + | ||
34 | gdb/configure.nat | 4 + | ||
35 | 4 files changed, 328 insertions(+) | ||
36 | create mode 100644 gdb/arc-linux-nat.c | ||
37 | |||
38 | diff --git a/gdb/Makefile.in b/gdb/Makefile.in | ||
39 | index ec371fc7e52..c76136907ae 100644 | ||
40 | --- a/gdb/Makefile.in | ||
41 | +++ b/gdb/Makefile.in | ||
42 | @@ -2136,6 +2136,7 @@ ALLDEPFILES = \ | ||
43 | amd64-obsd-tdep.c \ | ||
44 | amd64-sol2-tdep.c \ | ||
45 | amd64-tdep.c \ | ||
46 | + arc-linux-nat.c \ | ||
47 | arc-tdep.c \ | ||
48 | arm.c \ | ||
49 | arm-bsd-tdep.c \ | ||
50 | diff --git a/gdb/arc-linux-nat.c b/gdb/arc-linux-nat.c | ||
51 | new file mode 100644 | ||
52 | index 00000000000..41301fd4fed | ||
53 | --- /dev/null | ||
54 | +++ b/gdb/arc-linux-nat.c | ||
55 | @@ -0,0 +1,320 @@ | ||
56 | +/* Native-dependent code for GNU/Linux ARC. | ||
57 | + | ||
58 | + Copyright 2020 Free Software Foundation, Inc. | ||
59 | + | ||
60 | + This file is part of GDB. | ||
61 | + | ||
62 | + This program is free software; you can redistribute it and/or modify | ||
63 | + it under the terms of the GNU General Public License as published by | ||
64 | + the Free Software Foundation; either version 3 of the License, or | ||
65 | + (at your option) any later version. | ||
66 | + | ||
67 | + This program is distributed in the hope that it will be useful, | ||
68 | + but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
69 | + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
70 | + GNU General Public License for more details. | ||
71 | + | ||
72 | + You should have received a copy of the GNU General Public License | ||
73 | + along with this program. If not, see <http://www.gnu.org/licenses/>. */ | ||
74 | + | ||
75 | +#include "defs.h" | ||
76 | +#include "frame.h" | ||
77 | +#include "inferior.h" | ||
78 | +#include "gdbcore.h" | ||
79 | +#include "regcache.h" | ||
80 | +#include "gdbsupport/gdb_assert.h" | ||
81 | +#include "target.h" | ||
82 | +#include "linux-nat.h" | ||
83 | +#include "nat/gdb_ptrace.h" | ||
84 | + | ||
85 | +#include <stdint.h> | ||
86 | +#include <sys/types.h> | ||
87 | +#include <sys/param.h> | ||
88 | +#include <signal.h> | ||
89 | +#include <sys/user.h> | ||
90 | +#include <sys/ioctl.h> | ||
91 | +#include "gdbsupport/gdb_wait.h" | ||
92 | +#include <fcntl.h> | ||
93 | +#include <sys/procfs.h> | ||
94 | +#include <linux/elf.h> | ||
95 | + | ||
96 | +#include "gregset.h" | ||
97 | +#include "arc-tdep.h" | ||
98 | +#include "arc-linux-tdep.h" | ||
99 | +#include "arch/arc.h" | ||
100 | + | ||
101 | +/* Defines ps_err_e, struct ps_prochandle. */ | ||
102 | +#include "gdb_proc_service.h" | ||
103 | + | ||
104 | +/* Linux starting with 4.12 supports NT_ARC_V2 note type, which adds R30, | ||
105 | + R58 and R59 registers, which are specific to ARC HS and aren't | ||
106 | + available in ARC 700. */ | ||
107 | +#if defined (NT_ARC_V2) && defined (__ARCHS__) | ||
108 | +#define ARC_HAS_V2_REGSET | ||
109 | +#endif | ||
110 | + | ||
111 | +class arc_linux_nat_target final : public linux_nat_target | ||
112 | +{ | ||
113 | +public: | ||
114 | + /* Add ARC register access methods. */ | ||
115 | + void fetch_registers (struct regcache *, int) override; | ||
116 | + void store_registers (struct regcache *, int) override; | ||
117 | + | ||
118 | + const struct target_desc *read_description () override; | ||
119 | + | ||
120 | + /* Handle threads */ | ||
121 | + void low_prepare_to_resume (struct lwp_info *lp) override; | ||
122 | +}; | ||
123 | + | ||
124 | +static arc_linux_nat_target the_arc_linux_nat_target; | ||
125 | + | ||
126 | +/* Read general registers from target process/thread (via ptrace) | ||
127 | + into REGCACHE. */ | ||
128 | + | ||
129 | +static void | ||
130 | +fetch_gregs (struct regcache *regcache, int regnum) | ||
131 | +{ | ||
132 | + const int tid = get_ptrace_pid (regcache->ptid ()); | ||
133 | + struct iovec iov; | ||
134 | + gdb_gregset_t regs; | ||
135 | + | ||
136 | + iov.iov_base = ®s; | ||
137 | + iov.iov_len = sizeof (gdb_gregset_t); | ||
138 | + | ||
139 | + if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, (void *) &iov) < 0) | ||
140 | + perror_with_name (_("Couldn't get general registers")); | ||
141 | + else | ||
142 | + arc_linux_supply_gregset (NULL, regcache, regnum, ®s, 0); | ||
143 | +} | ||
144 | + | ||
145 | +#ifdef ARC_HAS_V2_REGSET | ||
146 | +/* Read ARC v2 registers from target process/thread (via ptrace) | ||
147 | + into REGCACHE. */ | ||
148 | + | ||
149 | +static void | ||
150 | +fetch_v2_regs (struct regcache *regcache, int regnum) | ||
151 | +{ | ||
152 | + const int tid = get_ptrace_pid (regcache->ptid ()); | ||
153 | + struct iovec iov; | ||
154 | + bfd_byte v2_buffer[ARC_LINUX_SIZEOF_V2_REGSET]; | ||
155 | + | ||
156 | + iov.iov_base = &v2_buffer; | ||
157 | + iov.iov_len = ARC_LINUX_SIZEOF_V2_REGSET; | ||
158 | + | ||
159 | + if (ptrace (PTRACE_GETREGSET, tid, NT_ARC_V2, (void *) &iov) < 0) | ||
160 | + perror_with_name (_("Couldn't get ARC HS registers")); | ||
161 | + else | ||
162 | + arc_linux_supply_v2_regset (NULL, regcache, regnum, v2_buffer, 0); | ||
163 | +} | ||
164 | +#endif | ||
165 | + | ||
166 | +/* Store general registers from REGCACHE into the target process/thread. */ | ||
167 | + | ||
168 | +static void | ||
169 | +store_gregs (const struct regcache *regcache, int regnum) | ||
170 | +{ | ||
171 | + const int tid = get_ptrace_pid (regcache->ptid ()); | ||
172 | + struct iovec iov; | ||
173 | + gdb_gregset_t regs; | ||
174 | + | ||
175 | + iov.iov_base = ®s; | ||
176 | + iov.iov_len = sizeof (gdb_gregset_t); | ||
177 | + | ||
178 | + if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, (void *) &iov) < 0) | ||
179 | + perror_with_name (_("Couldn't get general registers")); | ||
180 | + else | ||
181 | + { | ||
182 | + arc_linux_collect_gregset (NULL, regcache, regnum, regs, 0); | ||
183 | + | ||
184 | + if (ptrace (PTRACE_SETREGSET, tid, NT_PRSTATUS, (void *) &iov) < 0) | ||
185 | + perror_with_name (_("Couldn't write general registers")); | ||
186 | + } | ||
187 | +} | ||
188 | + | ||
189 | +#ifdef ARC_HAS_V2_REGSET | ||
190 | +/* Store ARC v2 registers from REGCACHE into the target process/thread. */ | ||
191 | + | ||
192 | +static void | ||
193 | +store_v2_regs (const struct regcache *regcache, int regnum) | ||
194 | +{ | ||
195 | + const int tid = get_ptrace_pid (regcache->ptid ()); | ||
196 | + struct iovec iov; | ||
197 | + bfd_byte v2_buffer[ARC_LINUX_SIZEOF_V2_REGSET]; | ||
198 | + | ||
199 | + iov.iov_base = &v2_buffer; | ||
200 | + iov.iov_len = ARC_LINUX_SIZEOF_V2_REGSET; | ||
201 | + | ||
202 | + if (ptrace (PTRACE_GETREGSET, tid, NT_ARC_V2, (void *) &iov) < 0) | ||
203 | + perror_with_name (_("Couldn't get ARC HS registers")); | ||
204 | + else | ||
205 | + { | ||
206 | + arc_linux_collect_v2_regset (NULL, regcache, regnum, v2_buffer, 0); | ||
207 | + | ||
208 | + if (ptrace (PTRACE_SETREGSET, tid, NT_ARC_V2, (void *) &iov) < 0) | ||
209 | + perror_with_name (_("Couldn't write ARC HS registers")); | ||
210 | + } | ||
211 | +} | ||
212 | +#endif | ||
213 | + | ||
214 | +/* Target operation: Read REGNUM register (all registers if REGNUM == -1) | ||
215 | + from target process into REGCACHE. */ | ||
216 | + | ||
217 | +void | ||
218 | +arc_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum) | ||
219 | +{ | ||
220 | + | ||
221 | + if (regnum == -1 || regnum <= ARC_LAST_REGNUM) | ||
222 | + fetch_gregs (regcache, regnum); | ||
223 | + | ||
224 | +#ifdef ARC_HAS_V2_REGSET | ||
225 | + if (regnum == -1 | ||
226 | + || regnum == ARC_R30_REGNUM | ||
227 | + || regnum == ARC_R58_REGNUM | ||
228 | + || regnum == ARC_R59_REGNUM) | ||
229 | + fetch_v2_regs (regcache, regnum); | ||
230 | +#endif | ||
231 | +} | ||
232 | + | ||
233 | +/* Target operation: Store REGNUM register (all registers if REGNUM == -1) | ||
234 | + to the target process from REGCACHE. */ | ||
235 | + | ||
236 | +void | ||
237 | +arc_linux_nat_target::store_registers (struct regcache *regcache, int regnum) | ||
238 | +{ | ||
239 | + if (regnum == -1 || regnum <= ARC_LAST_REGNUM) | ||
240 | + store_gregs (regcache, regnum); | ||
241 | + | ||
242 | +#ifdef ARC_HAS_V2_REGSET | ||
243 | + if (regnum == -1 | ||
244 | + || regnum == ARC_R30_REGNUM | ||
245 | + || regnum == ARC_R58_REGNUM | ||
246 | + || regnum == ARC_R59_REGNUM) | ||
247 | + store_v2_regs (regcache, regnum); | ||
248 | +#endif | ||
249 | +} | ||
250 | + | ||
251 | +/* Copy general purpose register(s) from REGCACHE into regset GREGS. | ||
252 | + This function is exported to proc-service.c */ | ||
253 | + | ||
254 | +void | ||
255 | +fill_gregset (const struct regcache *regcache, | ||
256 | + gdb_gregset_t *gregs, int regnum) | ||
257 | +{ | ||
258 | + arc_linux_collect_gregset (NULL, regcache, regnum, gregs, 0); | ||
259 | +} | ||
260 | + | ||
261 | +/* Copy all the general purpose registers from regset GREGS into REGCACHE. | ||
262 | + This function is exported to proc-service.c. */ | ||
263 | + | ||
264 | +void | ||
265 | +supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregs) | ||
266 | +{ | ||
267 | + arc_linux_supply_gregset (NULL, regcache, -1, gregs, 0); | ||
268 | +} | ||
269 | + | ||
270 | +/* ARC doesn't have separate FP registers. This function is exported | ||
271 | + to proc-service.c. */ | ||
272 | + | ||
273 | +void | ||
274 | +fill_fpregset (const struct regcache *regcache, | ||
275 | + gdb_fpregset_t *fpregsetp, int regnum) | ||
276 | +{ | ||
277 | + if (arc_debug) | ||
278 | + debug_printf ("arc-linux-nat: fill_fpregset called."); | ||
279 | + return; | ||
280 | +} | ||
281 | + | ||
282 | +/* ARC doesn't have separate FP registers. This function is exported | ||
283 | + to proc-service.c. */ | ||
284 | + | ||
285 | +void | ||
286 | +supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp) | ||
287 | +{ | ||
288 | + if (arc_debug) | ||
289 | + debug_printf ("arc-linux-nat: supply_fpregset called."); | ||
290 | + return; | ||
291 | +} | ||
292 | + | ||
293 | +/* Implement the "read_description" method of linux_nat_target. */ | ||
294 | + | ||
295 | +const struct target_desc * | ||
296 | +arc_linux_nat_target::read_description () | ||
297 | +{ | ||
298 | + /* This is a native target, hence description is hardcoded. */ | ||
299 | +#ifdef __ARCHS__ | ||
300 | + arc_arch_features features (4, ARC_ISA_ARCV2); | ||
301 | +#else | ||
302 | + arc_arch_features features (4, ARC_ISA_ARCV1); | ||
303 | +#endif | ||
304 | + return arc_lookup_target_description (features); | ||
305 | +} | ||
306 | + | ||
307 | +/* As described in arc_linux_collect_gregset(), we need to write resume-PC | ||
308 | + to ERET. However by default GDB for native targets doesn't write | ||
309 | + registers if they haven't been changed. This is a callback called by | ||
310 | + generic GDB, and in this callback we have to rewrite PC value so it | ||
311 | + would force rewrite of register on target. It seems that the only | ||
312 | + other arch that utilizes this hook is x86/x86-64 for HW breakpoint | ||
313 | + support. But then, AFAIK no other arch has this stop_pc/eret | ||
314 | + complexity. | ||
315 | + | ||
316 | + No better way was found, other than this fake write of register value, | ||
317 | + to force GDB into writing register to target. Is there any? */ | ||
318 | + | ||
319 | +void | ||
320 | +arc_linux_nat_target::low_prepare_to_resume (struct lwp_info *lwp) | ||
321 | +{ | ||
322 | + /* When new processes and threads are created we do not have the address | ||
323 | + space for them and calling get_thread_regcache will cause an internal | ||
324 | + error in GDB. It looks like that checking for last_resume_kind is the | ||
325 | + sensible way to determine processes for which we cannot get regcache. | ||
326 | + Ultimately, a better way would be removing the need for | ||
327 | + low_prepare_to_resume in the first place. */ | ||
328 | + if (lwp->last_resume_kind == resume_stop) | ||
329 | + return; | ||
330 | + | ||
331 | + struct regcache *regcache = get_thread_regcache (this, lwp->ptid); | ||
332 | + struct gdbarch *gdbarch = regcache->arch (); | ||
333 | + | ||
334 | + /* Read current PC value, then write it back. It is required to call | ||
335 | + invalidate(), otherwise GDB will note that new value is equal to old | ||
336 | + value and will skip write. */ | ||
337 | + ULONGEST new_pc; | ||
338 | + regcache_cooked_read_unsigned (regcache, gdbarch_pc_regnum (gdbarch), | ||
339 | + &new_pc); | ||
340 | + regcache->invalidate (gdbarch_pc_regnum (gdbarch)); | ||
341 | + regcache_cooked_write_unsigned (regcache, gdbarch_pc_regnum (gdbarch), | ||
342 | + new_pc); | ||
343 | +} | ||
344 | + | ||
345 | +/* Fetch the thread-local storage pointer for libthread_db. Note that | ||
346 | + this function is not called from GDB, but is called from libthread_db. | ||
347 | + This is required to debug multithreaded applications with NPTL. */ | ||
348 | + | ||
349 | +ps_err_e | ||
350 | +ps_get_thread_area (struct ps_prochandle *ph, lwpid_t lwpid, int idx, | ||
351 | + void **base) | ||
352 | +{ | ||
353 | + if (arc_debug >= 2) | ||
354 | + debug_printf ("arc-linux-nat: ps_get_thread_area called"); | ||
355 | + | ||
356 | + if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0) | ||
357 | + return PS_ERR; | ||
358 | + | ||
359 | + /* IDX is the bias from the thread pointer to the beginning of the | ||
360 | + thread descriptor. It has to be subtracted due to implementation | ||
361 | + quirks in libthread_db. */ | ||
362 | + *base = (void *) ((char *) *base - idx); | ||
363 | + | ||
364 | + return PS_OK; | ||
365 | +} | ||
366 | + | ||
367 | +/* Suppress warning from -Wmissing-prototypes. */ | ||
368 | +void _initialize_arc_linux_nat (); | ||
369 | +void | ||
370 | +_initialize_arc_linux_nat () | ||
371 | +{ | ||
372 | + /* Register the target. */ | ||
373 | + linux_target = &the_arc_linux_nat_target; | ||
374 | + add_inf_child_target (&the_arc_linux_nat_target); | ||
375 | +} | ||
376 | diff --git a/gdb/configure.host b/gdb/configure.host | ||
377 | index ce528237291..e94a19b0332 100644 | ||
378 | --- a/gdb/configure.host | ||
379 | +++ b/gdb/configure.host | ||
380 | @@ -60,6 +60,7 @@ case "${host_cpu}" in | ||
381 | |||
382 | aarch64*) gdb_host_cpu=aarch64 ;; | ||
383 | alpha*) gdb_host_cpu=alpha ;; | ||
384 | +arc*) gdb_host_cpu=arc ;; | ||
385 | arm*) gdb_host_cpu=arm ;; | ||
386 | hppa*) gdb_host_cpu=pa ;; | ||
387 | i[34567]86*) gdb_host_cpu=i386 ;; | ||
388 | @@ -91,6 +92,8 @@ alpha*-*-netbsd* | alpha*-*-knetbsd*-gnu) | ||
389 | gdb_host=nbsd ;; | ||
390 | alpha*-*-openbsd*) gdb_host=nbsd ;; | ||
391 | |||
392 | +arc*-*-linux*) gdb_host=linux ;; | ||
393 | + | ||
394 | arm*-*-freebsd*) gdb_host=fbsd ;; | ||
395 | arm*-*-linux*) gdb_host=linux ;; | ||
396 | arm*-*-netbsdelf* | arm*-*-knetbsd*-gnu) | ||
397 | diff --git a/gdb/configure.nat b/gdb/configure.nat | ||
398 | index bb70e303384..cd11bc86dca 100644 | ||
399 | --- a/gdb/configure.nat | ||
400 | +++ b/gdb/configure.nat | ||
401 | @@ -238,6 +238,10 @@ case ${gdb_host} in | ||
402 | nat/aarch64-linux.o \ | ||
403 | nat/aarch64-sve-linux-ptrace.o" | ||
404 | ;; | ||
405 | + arc) | ||
406 | + # Host: ARC based machine running GNU/Linux | ||
407 | + NATDEPFILES="${NATDEPFILES} arc-linux-nat.o" | ||
408 | + ;; | ||
409 | arm) | ||
410 | # Host: ARM based machine running GNU/Linux | ||
411 | NATDEPFILES="${NATDEPFILES} arm-linux-nat.o \ | ||
412 | -- | ||
413 | 2.16.2 | ||
414 | |||