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| author | John Baldwin <jhb@FreeBSD.org> | 2017-09-14 15:07:48 +0000 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2017-09-14 15:07:48 +0000 |
| commit | 27efb0a2422308cb6ba1170bbaa32546fce5a85b (patch) | |
| tree | e5c1a0ac2a9ebd01a2b81e125ca78ff6beb485b5 /usr.bin/gcore/elfcore.c | |
| parent | ca2b367f5c8deac7704e2f6e6c96c1500bc4c0c0 (diff) | |
| download | src-27efb0a2422308cb6ba1170bbaa32546fce5a85b.tar.gz src-27efb0a2422308cb6ba1170bbaa32546fce5a85b.zip | |
Add a NT_ARM_VFP ELF core note to hold VFP registers for each thread.
The core note matches the format and layout of NT_ARM_VFP on Linux.
Debuggers use the AT_HWCAP flags to determine how many VFP registers
are actually used and their format.
Reviewed by: mmel (earlier version w/o gcore)
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D12293
Notes
Notes:
svn path=/head/; revision=323584
Diffstat (limited to 'usr.bin/gcore/elfcore.c')
| -rw-r--r-- | usr.bin/gcore/elfcore.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/usr.bin/gcore/elfcore.c b/usr.bin/gcore/elfcore.c index ff1010001c3f..ae52d61c9281 100644 --- a/usr.bin/gcore/elfcore.c +++ b/usr.bin/gcore/elfcore.c @@ -109,6 +109,9 @@ static void *elf_note_prpsinfo(void *, size_t *); static void *elf_note_prstatus(void *, size_t *); static void *elf_note_thrmisc(void *, size_t *); static void *elf_note_ptlwpinfo(void *, size_t *); +#if defined(__arm__) +static void *elf_note_arm_vfp(void *, size_t *); +#endif #if defined(__i386__) || defined(__amd64__) static void *elf_note_x86_xstate(void *, size_t *); #endif @@ -368,6 +371,9 @@ elf_putnotes(pid_t pid, struct sbuf *sb, size_t *sizep) elf_putnote(NT_FPREGSET, elf_note_fpregset, tids + i, sb); elf_putnote(NT_THRMISC, elf_note_thrmisc, tids + i, sb); elf_putnote(NT_PTLWPINFO, elf_note_ptlwpinfo, tids + i, sb); +#if defined(__arm__) + elf_putnote(NT_ARM_VFP, elf_note_arm_vfp, tids + i, sb); +#endif #if defined(__i386__) || defined(__amd64__) elf_putnote(NT_X86_XSTATE, elf_note_x86_xstate, tids + i, sb); #endif @@ -718,6 +724,31 @@ elf_note_ptlwpinfo(void *arg, size_t *sizep) return (p); } +#if defined(__arm__) +static void * +elf_note_arm_vfp(void *arg, size_t *sizep) +{ + lwpid_t tid; + struct vfpreg *vfp; + static bool has_vfp = true; + struct vfpreg info; + + tid = *(lwpid_t *)arg; + if (has_vfp) { + if (ptrace(PT_GETVFPREGS, tid, (void *)&info, 0) != 0) + has_vfp = false; + } + if (!has_vfp) { + *sizep = 0; + return (NULL); + } + vfp = calloc(1, sizeof(*vfp)); + memcpy(vfp, &info, sizeof(*vfp)); + *sizep = sizeof(*vfp); + return (vfp); +} +#endif + #if defined(__i386__) || defined(__amd64__) static void * elf_note_x86_xstate(void *arg, size_t *sizep) |