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PR gdb/12796 

PR gdb/12798
PR gdb/12800
* amd64-tdep.h (enum amd64_regnum): Add AMD64_ST1_REGNUM and
AMD64_FTAG_REGNUM.
* amd64-tdep.c (amd64_classify): Classify complex types.
(amd64_return_value): Handle the COMPLEX_X87 class.
This commit is contained in:
Mark Kettenis 2012-10-23 18:16:55 +00:00
parent 9ece1fa991
commit 7f7930dd88
3 changed files with 53 additions and 0 deletions
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10
gdb/ChangeLog
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@ -1,3 +1,13 @@
2012-10-23 Mark Kettenis <kettenis@gnu.org>
PR gdb/12796
PR gdb/12798
PR gdb/12800
* amd64-tdep.h (enum amd64_regnum): Add AMD64_ST1_REGNUM and
AMD64_FTAG_REGNUM.
* amd64-tdep.c (amd64_classify): Classify complex types.
(amd64_return_value): Handle the COMPLEX_X87 class.
2012-10-23 Joel Brobecker <brobecker@adacore.com>
* rs6000-aix-tdep.c (rs6000_aix_auto_wide_charset): New function.

41
gdb/amd64-tdep.c
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@ -586,6 +586,23 @@ amd64_classify (struct type *type, enum amd64_reg_class class[2])
/* Class X87 and X87UP. */
class[0] = AMD64_X87, class[1] = AMD64_X87UP;
/* Arguments of complex T where T is one of the types float or
double get treated as if they are implemented as:
struct complexT {
T real;
T imag;
}; */
else if (code == TYPE_CODE_COMPLEX && len == 8)
class[0] = AMD64_SSE;
else if (code == TYPE_CODE_COMPLEX && len == 16)
class[0] = class[1] = AMD64_SSE;
/* A variable of type complex long double is classified as type
COMPLEX_X87. */
else if (code == TYPE_CODE_COMPLEX && len == 32)
class[0] = AMD64_COMPLEX_X87;
/* Aggregates. */
else if (code == TYPE_CODE_ARRAY || code == TYPE_CODE_STRUCT
|| code == TYPE_CODE_UNION)
@ -636,6 +653,30 @@ amd64_return_value (struct gdbarch *gdbarch, struct value *function,
return RETURN_VALUE_ABI_RETURNS_ADDRESS;
}
/* 8. If the class is COMPLEX_X87, the real part of the value is
returned in %st0 and the imaginary part in %st1. */
if (class[0] == AMD64_COMPLEX_X87)
{
if (readbuf)
{
regcache_raw_read (regcache, AMD64_ST0_REGNUM, readbuf);
regcache_raw_read (regcache, AMD64_ST1_REGNUM, readbuf + 16);
}
if (writebuf)
{
i387_return_value (gdbarch, regcache);
regcache_raw_write (regcache, AMD64_ST0_REGNUM, writebuf);
regcache_raw_write (regcache, AMD64_ST1_REGNUM, writebuf + 16);
/* Fix up the tag word such that both %st(0) and %st(1) are
marked as valid. */
regcache_raw_write_unsigned (regcache, AMD64_FTAG_REGNUM, 0xfff);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
gdb_assert (class[1] != AMD64_MEMORY);
gdb_assert (len <= 16);

2
gdb/amd64-tdep.h
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@ -57,8 +57,10 @@ enum amd64_regnum
AMD64_FS_REGNUM, /* %fs */
AMD64_GS_REGNUM, /* %gs */
AMD64_ST0_REGNUM = 24, /* %st0 */
AMD64_ST1_REGNUM, /* %st1 */
AMD64_FCTRL_REGNUM = AMD64_ST0_REGNUM + 8,
AMD64_FSTAT_REGNUM = AMD64_ST0_REGNUM + 9,
AMD64_FTAG_REGNUM = AMD64_ST0_REGNUM + 10,
AMD64_XMM0_REGNUM = 40, /* %xmm0 */
AMD64_XMM1_REGNUM, /* %xmm1 */
AMD64_MXCSR_REGNUM = AMD64_XMM0_REGNUM + 16,