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* ppc-linux-tdep.c (ppc_linux_init_abi): Long doubles are eight

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bytes long on PPC GNU/Linux.
This commit is contained in:
Jim Blandy 2004-03-26 20:59:38 +00:00
parent 8c691c7a43
commit 81a07a45e4
2 changed files with 14 additions and 0 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2004-03-26 Jim Blandy <jimb@redhat.com>
* ppc-linux-tdep.c (ppc_linux_init_abi): Long doubles are eight
bytes long on PPC GNU/Linux.
2004-03-26 David Carlton <carlton@kealia.com> 2004-03-26 David Carlton <carlton@kealia.com>
* PROBLEMS: Refer to gdb/1588 instead of gdb/826. * PROBLEMS: Refer to gdb/1588 instead of gdb/826.

9
gdb/ppc-linux-tdep.c
View file

@ -1076,6 +1076,15 @@ ppc_linux_init_abi (struct gdbarch_info info,
if (tdep->wordsize == 4) if (tdep->wordsize == 4)
{ {
/* NOTE: jimb/2004-03-26: The System V ABI PowerPC Processor
Supplement says that long doubles are sixteen bytes long.
However, as one of the known warts of its ABI, PPC GNU/Linux
uses eight-byte long doubles. GCC only recently got 128-bit
long double support on PPC, so it may be changing soon. The
Linux Standards Base says that programs that use 'long
double' on PPC GNU/Linux are non-conformant. */
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
/* Until November 2001, gcc did not comply with the 32 bit SysV /* Until November 2001, gcc did not comply with the 32 bit SysV
R4 ABI requirement that structures less than or equal to 8 R4 ABI requirement that structures less than or equal to 8
bytes should be returned in registers. Instead GCC was using bytes should be returned in registers. Instead GCC was using