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* ppc-linux-tdep.c: More "Linux" -> "GNU/Linux".

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Jim Blandy
2003-06-24 23:09:22 +00:00
parent 02631ec09e
commit e538d2d7ba
2 changed files with 19 additions and 17 deletions
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2
gdb/ChangeLog
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@ -1,5 +1,7 @@
2003-06-24 Jim Blandy <jimb@redhat.com> 2003-06-24 Jim Blandy <jimb@redhat.com>
* ppc-linux-tdep.c: More "Linux" -> "GNU/Linux".
* ppc-linux-tdep.c (ppc64_linux_convert_from_func_ptr_addr): New * ppc-linux-tdep.c (ppc64_linux_convert_from_func_ptr_addr): New
function. function.
(ppc_linux_init_abi): Register it as the (ppc_linux_init_abi): Register it as the

34
gdb/ppc-linux-tdep.c
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@ -731,7 +731,7 @@ insn_ds_field (unsigned int insn)
} }
/* If DESC is the address of a 64-bit PowerPC Linux function /* If DESC is the address of a 64-bit PowerPC GNU/Linux function
descriptor, return the descriptor's entry point. */ descriptor, return the descriptor's entry point. */
static CORE_ADDR static CORE_ADDR
ppc64_desc_entry_point (CORE_ADDR desc) ppc64_desc_entry_point (CORE_ADDR desc)
@ -894,22 +894,22 @@ ppc64_skip_trampoline_code (CORE_ADDR pc)
} }
/* Support for CONVERT_FROM_FUNC_PTR_ADDR(ADDR) on PPC64 Linux. /* Support for CONVERT_FROM_FUNC_PTR_ADDR(ADDR) on PPC64 GNU/Linux.
Usually a function pointer's representation is simply the address Usually a function pointer's representation is simply the address
of the function. On Linux on the 64-bit PowerPC however, a function of the function. On GNU/Linux on the 64-bit PowerPC however, a
pointer is represented by a pointer to a TOC entry. This TOC entry function pointer is represented by a pointer to a TOC entry. This
contains three words, the first word is the address of the TOC entry contains three words, the first word is the address of
function, the second word is the TOC pointer (r2), and the third the function, the second word is the TOC pointer (r2), and the
word is the static chain value. Throughout GDB it is currently third word is the static chain value. Throughout GDB it is
assumed that a function pointer contains the address of the currently assumed that a function pointer contains the address of
function, which is not easy to fix. In addition, the conversion of the function, which is not easy to fix. In addition, the
a function address to a function pointer would require allocation conversion of a function address to a function pointer would
of a TOC entry in the inferior's memory space, with all its require allocation of a TOC entry in the inferior's memory space,
drawbacks. To be able to call C++ virtual methods in the inferior with all its drawbacks. To be able to call C++ virtual methods in
(which are called via function pointers), find_function_addr uses the inferior (which are called via function pointers),
this function to get the function address from a function find_function_addr uses this function to get the function address
pointer. */ from a function pointer. */
/* Return real function address if ADDR (a function pointer) is in the data /* Return real function address if ADDR (a function pointer) is in the data
space and is therefore a special function pointer. */ space and is therefore a special function pointer. */
@ -929,7 +929,7 @@ ppc64_linux_convert_from_func_ptr_addr (CORE_ADDR addr)
} }
/* On 64-bit PowerPC Linux, the ELF header's e_entry field is the /* On 64-bit PowerPC GNU/Linux, the ELF header's e_entry field is the
address of a function descriptor for the entry point function, not address of a function descriptor for the entry point function, not
the actual entry point itself. So to find the actual address at the actual entry point itself. So to find the actual address at
which execution should begin, we need to fetch the function's entry which execution should begin, we need to fetch the function's entry
@ -1062,7 +1062,7 @@ ppc_linux_init_abi (struct gdbarch_info info,
if (tdep->wordsize == 8) if (tdep->wordsize == 8)
{ {
/* Handle PPC64 Linux function pointers (which are really /* Handle PPC64 GNU/Linux function pointers (which are really
function descriptors). */ function descriptors). */
set_gdbarch_convert_from_func_ptr_addr set_gdbarch_convert_from_func_ptr_addr
(gdbarch, ppc64_linux_convert_from_func_ptr_addr); (gdbarch, ppc64_linux_convert_from_func_ptr_addr);