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compiler: add a sizeof_field() macro

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Determining the size of a field is useful when you don't have a struct
variable handy.  Open-coding this is ugly.

This patch adds the sizeof_field() macro, which is similar to
typeof_field().  Existing instances are updated to use the macro.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20180614164431.29305-1-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2018-06-14 17:44:31 +01:00
parent 00928a421d
commit f18793b096
9 changed files with 24 additions and 22 deletions
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10
target/ppc/arch_dump.c
View file

@ -210,11 +210,11 @@ static const struct NoteFuncDescStruct {
int contents_size;
void (*note_contents_func)(NoteFuncArg *arg, PowerPCCPU *cpu);
} note_func[] = {
{sizeof(((Note *)0)->contents.prstatus), ppc_write_elf_prstatus},
{sizeof(((Note *)0)->contents.fpregset), ppc_write_elf_fpregset},
{sizeof(((Note *)0)->contents.vmxregset), ppc_write_elf_vmxregset},
{sizeof(((Note *)0)->contents.vsxregset), ppc_write_elf_vsxregset},
{sizeof(((Note *)0)->contents.speregset), ppc_write_elf_speregset},
{sizeof_field(Note, contents.prstatus), ppc_write_elf_prstatus},
{sizeof_field(Note, contents.fpregset), ppc_write_elf_fpregset},
{sizeof_field(Note, contents.vmxregset), ppc_write_elf_vmxregset},
{sizeof_field(Note, contents.vsxregset), ppc_write_elf_vsxregset},
{sizeof_field(Note, contents.speregset), ppc_write_elf_speregset},
{ 0, NULL}
};