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PowerPC64 ELFv2 ABI: stack frame layout changes

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This implementes another change in ELFv2: the stack frame no longer
contains the reserved double words for linker and compiler use
(which weren't really used for much of anything anyway).  This
affects placement of on-stack parameters in inferior calls.

gdb/ChangeLog:

	* ppc-sysv-tdep.c (ppc64_sysv_abi_push_dummy_call): Use correct
	offset to the stack parameter list for the ELFv2 ABI.
This commit is contained in:
Ulrich Weigand 2014-02-04 18:41:36 +01:00
parent d4094b6a88
commit 52f548e41f
2 changed files with 12 additions and 3 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2014-02-04 Ulrich Weigand  <uweigand@de.ibm.com>
* ppc-sysv-tdep.c (ppc64_sysv_abi_push_dummy_call): Use correct
offset to the stack parameter list for the ELFv2 ABI.
2014-02-04 Ulrich Weigand  <uweigand@de.ibm.com>
* ppc-linux-tdep.c (ppc_linux_init_abi): Only call

10
gdb/ppc-sysv-tdep.c
View file

@ -1474,9 +1474,13 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
argpos.regcache = regcache;
argpos.refparam = align_down (sp - refparam_size, 16);
argpos.gparam = align_down (argpos.refparam - gparam_size, 16);
/* Add in space for the TOC, link editor double word,
compiler double word, LR save area, CR save area. */
sp = align_down (argpos.gparam - 48, 16);
/* Add in space for the TOC, link editor double word (v1 only),
compiler double word (v1 only), LR save area, CR save area,
and backchain. */
if (tdep->elf_abi == POWERPC_ELF_V1)
sp = align_down (argpos.gparam - 48, 16);
else
sp = align_down (argpos.gparam - 32, 16);
}
/* If the function is returning a `struct', then there is an