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dump: Use a buffer for ELF section data and headers

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Currently we're writing the NULL section header if we overflow the
physical header number in the ELF header. But in the future we'll add
custom section headers AND section data.

To facilitate this we need to rearange section handling a bit. As with
the other ELF headers we split the code into a prepare and a write
step.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221017083822.43118-2-frankja@linux.ibm.com>
This commit is contained in:
Janosch Frank 2022-10-17 08:38:13 +00:00 • committed by Marc-André Lureau
parent e750a7ace4
commit e41ed29bce
2 changed files with 55 additions and 26 deletions
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2
include/sysemu/dump.h
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@ -177,6 +177,8 @@ typedef struct DumpState {
int64_t filter_area_begin; /* Start address of partial guest memory area */
int64_t filter_area_length; /* Length of partial guest memory area */
void *elf_section_hdrs; /* Pointer to section header buffer */
uint8_t *note_buf; /* buffer for notes */
size_t note_buf_offset; /* the writing place in note_buf */
uint32_t nr_cpus; /* number of guest's cpu */