Where is the contents of target_fetch_registers ()
Hiroshi DOYU
Hiroshi_DOYU@montavista.co.jp
Thu May 13 09:50:00 GMT 2004
Hi all,
Now I am implementing gdb support on Linux kernel, Hitachi
SH-Mobile3 (SH73180CP01) and found that the following function
seems not to work correctly when compared with other gdb behavior
which work correctly.
# I can get this with "set debug target 1" option in gdb.
gdb a.out
GNU gdb 6.0 (MontaVista 6.0-8.0.7.0300532 2003-12-24)
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This GDB was configured as "sh-hardhat-linux"...
(gdb) list
2 {
3 int a, b, c;
4
5 a = b + c;
6 }
7
8 main()
9 {
10 while (1)
11 func();
(gdb) b func
Breakpoint 1 at 0x400356: file a.c, line 5.
(gdb) set debug target 1
(gdb) r
Starting program: /root/a.out
target_acknowledge_created_inferior (103)
target_reported_exec_events_per_exec_call () = 1
target_wait (-1, status) = 103, status->kind = stopped, signal = SIGTRAP
target_fetch_registers (pc) = a06b5529 0x29556ba0 693463968
target_terminal_init ()
target_terminal_inferior ()
target_terminal_inferior ()
target_resume (-1, continue, 0)
target_wait (-1, status) = 103, status->kind = stopped, signal = SIGTRAP
target_fetch_registers (pc) = a06b5529 0x29556ba0 693463968
target_post_startup_inferior (103)
target_xfer_memory (0x4104f4, xxx, 176, read, xxx) = 176, bytes = 01 00 00 00 01 00 00 00 0c 00 00 00
e0 01 40 00 0d 00 00 00 80 04 40 00 04 00 00 00
08 01 40 00 05 00 00 00 58 01 40 00 06 00 00 00
28 01 40 00 0a 00 00 00 2d 00 00 00 0b 00 00 00
10 00 00 00 15 00 00 00 00 00 00 00 03 00 00 00
b8 05 41 00 02 00 00 00 18 00 00 00 14 00 00 00
07 00 00 00 17 00 00 00 ac 01 40 00 fe ff ff 6f
8c 01 40 00 ff ff ff 6f 01 00 00 00 f0 ff ff 6f
86 01 40 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00
target_xfer_memory (0x400356, xxx, 2, read, xxx) = 2, bytes = e1 51
target_xfer_memory (0x400356, xxx, 2, write, xxx) = 2, bytes = c3 c3
target_insert_breakpoint (0x400356, xxx) = 0
target_xfer_memory (0x295613b0, xxx, 2, read, xxx) = 2, bytes = e6 2f
target_xfer_memory (0x295613b0, xxx, 2, write, xxx) = 2, bytes = c3 c3
target_insert_breakpoint (0x295613b0, xxx) = 0
target_terminal_inferior ()
target_resume (-1, continue, 0)
target_wait (-1, status) = 103, status->kind = stopped, signal = SIGTRAP
target_fetch_registers (pc) = b0135629 0x295613b0 693506992
target_xfer_memory (0x400356, xxx, 2, write, xxx) = 2, bytes = e1 51
target_remove_breakpoint (0x400356, xxx) = 0
target_xfer_memory (0x295613b0, xxx, 2, write, xxx) = 2, bytes = e6 2f
target_remove_breakpoint (0x295613b0, xxx) = 0
target_terminal_ours_for_output ()
target_xfer_memory (0x4104f4, xxx, 176, read, xxx) = 176, bytes = 01 00 00 00
01 00 00 00 0c 00 00 00 e0 01 40 00 0d 00 00 00
80 04 40 00 04 00 00 00 08 01 40 00 05 00 00 00
58 01 40 00 06 00 00 00 28 01 40 00 0a 00 00 00
2d 00 00 00 0b 00 00 00 10 00 00 00 15 00 00 00
3c 94 57 29 03 00 00 00 b8 05 41 00 02 00 00 00
18 00 00 00 14 00 00 00 07 00 00 00 17 00 00 00
ac 01 40 00 fe ff ff 6f 8c 01 40 00 ff ff ff 6f
01 00 00 00 f0 ff ff 6f 86 01 40 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00
target_xfer_memory (0x29579440, xxx, 4, read, xxx) = 4, bytes =
50 94 57 29
target_xfer_memory (0x29579450, xxx, 20, read, xxx) = 20, bytes = 00 00 00 00 f8 69 56 29
f4 04 41 00 18 99 57 29 00 00 00 00
target_xfer_memory (0x29579918, xxx, 20, read, xxx) = 20, bytes = 00 a0 57 29 08 99 57 29
bc 20 6a 29 b4 90 57 29 50 94 57 29
target_xfer_memory (0x29579908, xxx, 4, read, xxx) = 4, bytes = 2f 6c 69 62
target_xfer_memory (0x2957990c, xxx, 4, read, xxx) = 4, bytes = 2f 6c 69 62
target_xfer_memory (0x29579910, xxx, 4, read, xxx) = 4, bytes = 63 2e 73 6f
target_xfer_memory (0x29579914, xxx, 4, read, xxx) = 4, bytes = 2e 36 00 00
target_xfer_memory (0x295790b4, xxx, 20, read, xxx) = 20, bytes =
00 60 55 29 f4 00 40 00 d0 8e 57 29 00 00 00 00
18 99 57 29
target_xfer_memory (0x4000f4, xxx, 4, read, xxx) = 4, bytes = 2f 6c 69 62
target_xfer_memory (0x4000f8, xxx, 4, read, xxx) = 4, bytes = 2f 6c 64 2d
target_xfer_memory (0x4000fc, xxx, 4, read, xxx) = 4, bytes = 6c 69 6e 75
target_xfer_memory (0x400100, xxx, 4, read, xxx) = 4, bytes = 78 2e 73 6f
target_xfer_memory (0x400104, xxx, 4, read, xxx) = 4, bytes = 2e 32 00 00
<freeze>
I guess the following should have appeaer at this <freeze> line.
target_fetch_registers (r14) = 34f9ff7b 0x7bfff934 2080373044
I would like to look into the problem which it hang at the above
point but I dont know much about gdb. So could anyone tell me
how to find where is the contents of "target_fetch_registers ()"?
In other words, in Linux, how can gdb get the registers from
kernel?
Any comments will be appriciated.
Thanks,
-doyu
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