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Use pseudosections for NT_FREEBSD_X86_SEGBASES core dump notes.

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This includes adding pseudosections when reading a core dump as well
as support for writing out a core dump note from a pseudosection.

bfd/ChangeLog:

	* elf-bfd.h (elfcore_write_x86_segbases): New.
	* elf.c (elfcore_grok_freebsd_note): Add pseudosections for
	NT_FREEBSD_X86_SEGBASES register notes.
	(elfcore_write_x86_segbases): New.
	(elfcore_write_register_note): Write NT_FREEBSD_X86_SEGBASES
	register notes.
This commit is contained in:
John Baldwin 2022-04-01 13:16:46 -07:00
parent a171378aa4
commit b5c2367c3a
3 changed files with 25 additions and 0 deletions
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9
bfd/ChangeLog
View file

@ -1,3 +1,12 @@
2022-04-01 John Baldwin <jhb@FreeBSD.org>
* elf-bfd.h (elfcore_write_x86_segbases): New.
* elf.c (elfcore_grok_freebsd_note): Add pseudosections for
NT_FREEBSD_X86_SEGBASES register notes.
(elfcore_write_x86_segbases): New.
(elfcore_write_register_note): Write NT_FREEBSD_X86_SEGBASES
register notes.
2022-04-01 John Baldwin <jhb@FreeBSD.org> 2022-04-01 John Baldwin <jhb@FreeBSD.org>
* elf.c (elfcore_grok_freebsd_note): Remove checks for namesz. * elf.c (elfcore_grok_freebsd_note): Remove checks for namesz.

2
bfd/elf-bfd.h
View file

@ -2786,6 +2786,8 @@ extern char *elfcore_write_prxfpreg
(bfd *, char *, int *, const void *, int); (bfd *, char *, int *, const void *, int);
extern char *elfcore_write_xstatereg extern char *elfcore_write_xstatereg
(bfd *, char *, int *, const void *, int); (bfd *, char *, int *, const void *, int);
extern char *elfcore_write_x86_segbases
(bfd *, char *, int *, const void *, int);
extern char *elfcore_write_ppc_vmx extern char *elfcore_write_ppc_vmx
(bfd *, char *, int *, const void *, int); (bfd *, char *, int *, const void *, int);
extern char *elfcore_write_ppc_vsx extern char *elfcore_write_ppc_vsx

14
bfd/elf.c
View file

@ -11027,6 +11027,9 @@ elfcore_grok_freebsd_note (bfd *abfd, Elf_Internal_Note *note)
case NT_FREEBSD_PROCSTAT_AUXV: case NT_FREEBSD_PROCSTAT_AUXV:
return elfcore_make_auxv_note_section (abfd, note, 4); return elfcore_make_auxv_note_section (abfd, note, 4);
case NT_FREEBSD_X86_SEGBASES:
return elfcore_make_note_pseudosection (abfd, ".reg-x86-segbases", note);
case NT_X86_XSTATE: case NT_X86_XSTATE:
return elfcore_grok_xstatereg (abfd, note); return elfcore_grok_xstatereg (abfd, note);
@ -11904,6 +11907,15 @@ elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
note_name, NT_X86_XSTATE, xfpregs, size); note_name, NT_X86_XSTATE, xfpregs, size);
} }
char *
elfcore_write_x86_segbases (bfd *abfd, char *buf, int *bufsiz,
const void *regs, int size)
{
char *note_name = "FreeBSD";
return elfcore_write_note (abfd, buf, bufsiz,
note_name, NT_FREEBSD_X86_SEGBASES, regs, size);
}
char * char *
elfcore_write_ppc_vmx (bfd *abfd, elfcore_write_ppc_vmx (bfd *abfd,
char *buf, char *buf,
@ -12441,6 +12453,8 @@ elfcore_write_register_note (bfd *abfd,
return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size); return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
if (strcmp (section, ".reg-xstate") == 0) if (strcmp (section, ".reg-xstate") == 0)
return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size); return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
if (strcmp (section, ".reg-x86-segbases") == 0)
return elfcore_write_x86_segbases (abfd, buf, bufsiz, data, size);
if (strcmp (section, ".reg-ppc-vmx") == 0) if (strcmp (section, ".reg-ppc-vmx") == 0)
return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size); return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
if (strcmp (section, ".reg-ppc-vsx") == 0) if (strcmp (section, ".reg-ppc-vsx") == 0)