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66 lines
2.1 KiB
Diff
66 lines
2.1 KiB
Diff
--- gdb/avr-tdep.c.orig 2008-01-11 06:19:59.000000000 -0700
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+++ gdb/avr-tdep.c 2008-06-18 16:01:50.309167300 -0600
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@@ -181,8 +181,10 @@ struct avr_unwind_cache
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struct gdbarch_tdep
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{
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- /* FIXME: TRoth: is there anything to put here? */
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- int foo;
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+ /* Size of the PC on the current AVR target. This is equal 2 for
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+ most AVRs except for the ATmega256x devices that have a 3-byte
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+ PC. */
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+ int pcsize;
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};
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/* Lookup the name of a register given it's number. */
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@@ -1030,22 +1032,28 @@ avr_frame_prev_register (struct frame_in
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on the stack is in big endian byte order, even though most
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everything else about the avr is little endian. Ick! */
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- /* FIXME: number of bytes read here will need updated for the
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- mega256 when it is available. */
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-
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ULONGEST pc;
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unsigned char tmp;
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- unsigned char buf[2];
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+ unsigned char buf[3];
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- read_memory (info->saved_regs[regnum].addr, buf, 2);
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+ read_memory (info->saved_regs[regnum].addr, buf, tdep->pcsize);
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/* Convert the PC read from memory as a big-endian to
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little-endian order. */
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- tmp = buf[0];
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- buf[0] = buf[1];
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- buf[1] = tmp;
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+ if (tdep->pcsize == 2)
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+ {
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+ tmp = buf[0];
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+ buf[0] = buf[1];
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+ buf[1] = tmp;
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+ }
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+ else
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+ {
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+ tmp = buf[0];
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+ buf[0] = buf[2];
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+ buf[2] = tmp;
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+ }
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- pc = (extract_unsigned_integer (buf, 2) * 2);
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+ pc = (extract_unsigned_integer (buf, tdep->pcsize) * 2);
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store_unsigned_integer
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(bufferp, register_size (get_frame_arch (next_frame), regnum),
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pc);
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@@ -1280,6 +1288,11 @@ avr_gdbarch_init (struct gdbarch_info in
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case bfd_mach_avr3:
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case bfd_mach_avr4:
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case bfd_mach_avr5:
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+ tdep->pcsize = 2;
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+ break;
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+
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+ case bfd_mach_avr6:
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+ tdep->pcsize = 3;
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break;
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}
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