The stack unwinder did not understand the function prologs
generated by gcc with -Os. Add code to recognize and interpret the
prolog calls.
[gdb]
2015-10-02 James Bowman <james.bowman@ftdichip.com>
* ft32-tdep.c (ft32_analyze_prologue): Add function prolog
subroutine handling.
+2015-10-02 James Bowman <james.bowman@ftdichip.com>
+
+ * ft32-tdep.c (ft32_analyze_prologue): Add function prolog
+ subroutine handling.
+
2015-10-01 Simon Marchi <simon.marchi@ericsson.com>
* common/vec.h (VEC_OP (T,cleanup)): Add pointer cast.
2015-10-01 Simon Marchi <simon.marchi@ericsson.com>
* common/vec.h (VEC_OP (T,cleanup)): Add pointer cast.
CORE_ADDR next_addr;
ULONGEST inst, inst2;
LONGEST offset;
CORE_ADDR next_addr;
ULONGEST inst, inst2;
LONGEST offset;
+ int regnum, pushreg;
+ struct bound_minimal_symbol msymbol;
+ const int first_saved_reg = 13; /* The first saved register. */
+ /* PROLOGS are addresses of the subroutine prologs, PROLOGS[n]
+ is the address of __prolog_$rN.
+ __prolog_$rN pushes registers from 13 through n inclusive.
+ So for example CALL __prolog_$r15 is equivalent to:
+ PUSH $r13
+ PUSH $r14
+ PUSH $r15
+ Note that PROLOGS[0] through PROLOGS[12] are unused. */
+ CORE_ADDR prologs[32];
cache->saved_regs[FT32_PC_REGNUM] = 0;
cache->framesize = 0;
cache->saved_regs[FT32_PC_REGNUM] = 0;
cache->framesize = 0;
+ for (regnum = first_saved_reg; regnum < 32; regnum++)
+ {
+ char prolog_symbol[32];
+
+ snprintf (prolog_symbol, sizeof (prolog_symbol), "__prolog_$r%02d",
+ regnum);
+ msymbol = lookup_minimal_symbol (prolog_symbol, NULL, NULL);
+ if (msymbol.minsym)
+ prologs[regnum] = BMSYMBOL_VALUE_ADDRESS (msymbol);
+ else
+ prologs[regnum] = 0;
+ }
+
if (start_addr >= end_addr)
if (start_addr >= end_addr)
- for (next_addr = start_addr; next_addr < end_addr; )
+ for (next_addr = start_addr; next_addr < end_addr;)
{
inst = read_memory_unsigned_integer (next_addr, 4, byte_order);
if (FT32_IS_PUSH (inst))
{
{
inst = read_memory_unsigned_integer (next_addr, 4, byte_order);
if (FT32_IS_PUSH (inst))
{
- regnum = FT32_R0_REGNUM + FT32_PUSH_REG (inst);
+ pushreg = FT32_PUSH_REG (inst);
- cache->saved_regs[regnum] = cache->framesize;
+ cache->saved_regs[FT32_R0_REGNUM + pushreg] = cache->framesize;
+ else if (FT32_IS_CALL (inst))
+ {
+ for (regnum = first_saved_reg; regnum < 32; regnum++)
+ {
+ if ((4 * (inst & 0x3ffff)) == prologs[regnum])
+ {
+ for (pushreg = first_saved_reg; pushreg <= regnum;
+ pushreg++)
+ {
+ cache->framesize += 4;
+ cache->saved_regs[FT32_R0_REGNUM + pushreg] =
+ cache->framesize;
+ }
+ next_addr += 4;
+ }
+ }
+ break;
+ }
else
break;
}
for (regnum = FT32_R0_REGNUM; regnum < FT32_PC_REGNUM; regnum++)
{
if (cache->saved_regs[regnum] != REG_UNAVAIL)
else
break;
}
for (regnum = FT32_R0_REGNUM; regnum < FT32_PC_REGNUM; regnum++)
{
if (cache->saved_regs[regnum] != REG_UNAVAIL)
- cache->saved_regs[regnum] = cache->framesize - cache->saved_regs[regnum];
+ cache->saved_regs[regnum] =
+ cache->framesize - cache->saved_regs[regnum];
}
cache->saved_regs[FT32_PC_REGNUM] = cache->framesize;
}
cache->saved_regs[FT32_PC_REGNUM] = cache->framesize;