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elf/coredump: add support of dump task stack without memory segments

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Signed-off-by: chao an <anchao@xiaomi.com>
This commit is contained in:
chao an 2023-05-22 11:43:08 +08:00 committed by Xiang Xiao
parent 0133831a70
commit 24f4216066
5 changed files with 333 additions and 114 deletions
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5
binfmt/binfmt_coredump.c
View File

@ -44,7 +44,8 @@
****************************************************************************/
int core_dump(FAR struct memory_region_s *regions,
FAR struct lib_outstream_s *stream)
FAR struct lib_outstream_s *stream,
pid_t pid)
{
FAR struct binfmt_s *binfmt;
int ret = -ENOENT;
@ -55,7 +56,7 @@ int core_dump(FAR struct memory_region_s *regions,
if (binfmt->coredump)
{
ret = binfmt->coredump(regions, stream);
ret = binfmt->coredump(regions, stream, pid);
if (ret == OK)
{
break;

7
binfmt/elf.c
View File

@ -71,7 +71,8 @@ static int elf_loadbinary(FAR struct binary_s *binp,
int nexports);
#ifdef CONFIG_ELF_COREDUMP
static int elf_dumpbinary(FAR struct memory_region_s *regions,
FAR struct lib_outstream_s *stream);
FAR struct lib_outstream_s *stream,
pid_t pid);
#endif
#if defined(CONFIG_DEBUG_FEATURES) && defined(CONFIG_DEBUG_BINFMT)
static void elf_dumploadinfo(FAR struct elf_loadinfo_s *loadinfo);
@ -316,12 +317,14 @@ errout_with_init:
#ifdef CONFIG_ELF_COREDUMP
static int elf_dumpbinary(FAR struct memory_region_s *regions,
FAR struct lib_outstream_s *stream)
FAR struct lib_outstream_s *stream,
pid_t pid)
{
struct elf_dumpinfo_s dumpinfo;
dumpinfo.regions = regions;
dumpinfo.stream = stream;
dumpinfo.pid = pid;
return elf_coredump(&dumpinfo);
}

428
binfmt/libelf/libelf_coredump.c
View File

@ -23,6 +23,7 @@
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <sys/stat.h>
#include <sys/param.h>
@ -43,10 +44,20 @@
* Pre-processor Definitions
****************************************************************************/
#define ELF_PAGESIZE 4096
#ifdef PAGESIZE
# define ELF_PAGESIZE PAGESIZE
#else
# define ELF_PAGESIZE 1024
#endif
#define ROUNDUP(x, y) ((x + (y - 1)) / (y)) * (y)
/****************************************************************************
* Private Data
****************************************************************************/
static uint8_t g_running_regs[XCPTCONTEXT_SIZE] aligned_data(16);
/****************************************************************************
* Private Functions
****************************************************************************/
@ -128,15 +139,15 @@ static int elf_emit_align(FAR struct elf_dumpinfo_s *cinfo)
}
/****************************************************************************
* Name: elf_emit_header
* Name: elf_emit_hdr
*
* Description:
* Fill the elf header
*
****************************************************************************/
static int elf_emit_header(FAR struct elf_dumpinfo_s *cinfo,
int segs)
static int elf_emit_hdr(FAR struct elf_dumpinfo_s *cinfo,
int segs)
{
Elf_Ehdr ehdr;
@ -160,6 +171,30 @@ static int elf_emit_header(FAR struct elf_dumpinfo_s *cinfo,
return elf_emit(cinfo, &ehdr, sizeof(ehdr));
}
/****************************************************************************
* Name: elf_get_ntcb
*
* Description:
* Calculate the note segment size
*
****************************************************************************/
static int elf_get_ntcb(void)
{
int count = 0;
int i;
for (i = 0; i < g_npidhash; i++)
{
if (g_pidhash[i] != NULL)
{
count++;
}
}
return count;
}
/****************************************************************************
* Name: elf_get_note_size
*
@ -168,116 +203,262 @@ static int elf_emit_header(FAR struct elf_dumpinfo_s *cinfo,
*
****************************************************************************/
static int elf_get_note_size(void)
static int elf_get_note_size(int stksegs)
{
int count = 0;
int total;
int i;
for (i = 0; i < g_npidhash; i++)
{
if (g_pidhash[i])
{
count++;
}
}
total = count * (sizeof(Elf_Nhdr) + ROUNDUP(CONFIG_TASK_NAME_SIZE, 8) +
sizeof(elf_prstatus_t));
total += count * (sizeof(Elf_Nhdr) + ROUNDUP(CONFIG_TASK_NAME_SIZE, 8) +
sizeof(elf_prpsinfo_t));
total = stksegs * (sizeof(Elf_Nhdr) + ROUNDUP(CONFIG_TASK_NAME_SIZE, 8) +
sizeof(elf_prstatus_t));
total += stksegs * (sizeof(Elf_Nhdr) + ROUNDUP(CONFIG_TASK_NAME_SIZE, 8) +
sizeof(elf_prpsinfo_t));
return total;
}
/****************************************************************************
* Name: elf_emit_note_info
* Name: elf_emit_tcb_note
*
* Description:
* Fill the note segment information from tcb
*
****************************************************************************/
static void elf_emit_tcb_note(FAR struct elf_dumpinfo_s *cinfo,
FAR struct tcb_s *tcb)
{
char name[ROUNDUP(CONFIG_TASK_NAME_SIZE, 8)];
elf_prstatus_t status;
elf_prpsinfo_t info;
FAR uint32_t *regs;
Elf_Nhdr nhdr;
int i;
memset(&info, 0x0, sizeof(info));
memset(&status, 0x0, sizeof(status));
/* Fill Process info */
nhdr.n_namesz = sizeof(name);
nhdr.n_descsz = sizeof(info);
nhdr.n_type = NT_PRPSINFO;
elf_emit(cinfo, &nhdr, sizeof(nhdr));
strlcpy(name, tcb->name, sizeof(name));
elf_emit(cinfo, name, sizeof(name));
info.pr_pid = tcb->pid;
strlcpy(info.pr_fname, tcb->name, sizeof(info.pr_fname));
elf_emit(cinfo, &info, sizeof(info));
/* Fill Process status */
nhdr.n_descsz = sizeof(status);
nhdr.n_type = NT_PRSTATUS;
elf_emit(cinfo, &nhdr, sizeof(nhdr));
elf_emit(cinfo, name, sizeof(name));
status.pr_pid = tcb->pid;
if (running_task() == tcb)
{
if (up_interrupt_context())
{
regs = (FAR uint32_t *)CURRENT_REGS;
}
else
{
up_saveusercontext(g_running_regs);
regs = (FAR uint32_t *)g_running_regs;
}
}
else
{
regs = tcb->xcp.regs;
}
if (regs != NULL)
{
for (i = 0; i < nitems(status.pr_regs); i++)
{
if (g_tcbinfo.reg_off.p[i] == UINT16_MAX)
{
continue;
}
else
{
status.pr_regs[i] =
*(uintptr_t *)((uint8_t *)regs + g_tcbinfo.reg_off.p[i]);
}
}
}
elf_emit(cinfo, &status, sizeof(status));
}
/****************************************************************************
* Name: elf_emit_note
*
* Description:
* Fill the note segment information
*
****************************************************************************/
static void elf_emit_note_info(FAR struct elf_dumpinfo_s *cinfo)
static void elf_emit_note(FAR struct elf_dumpinfo_s *cinfo)
{
char name[ROUNDUP(CONFIG_TASK_NAME_SIZE, 8)];
FAR struct tcb_s *tcb;
elf_prstatus_t status;
elf_prpsinfo_t info;
Elf_Nhdr nhdr;
int i;
int j;
memset(&info, 0x0, sizeof(info));
memset(&status, 0x0, sizeof(status));
for (i = 0; i < g_npidhash; i++)
if (cinfo->pid == INVALID_PROCESS_ID)
{
if (g_pidhash[i] == NULL)
for (i = 0; i < g_npidhash; i++)
{
continue;
}
tcb = g_pidhash[i];
/* Fill Process info */
nhdr.n_namesz = sizeof(name);
nhdr.n_descsz = sizeof(info);
nhdr.n_type = NT_PRPSINFO;
elf_emit(cinfo, &nhdr, sizeof(nhdr));
strlcpy(name, tcb->name, sizeof(name));
elf_emit(cinfo, name, sizeof(name));
info.pr_pid = tcb->pid;
strlcpy(info.pr_fname, tcb->name, sizeof(info.pr_fname));
elf_emit(cinfo, &info, sizeof(info));
/* Fill Process status */
nhdr.n_descsz = sizeof(status);
nhdr.n_type = NT_PRSTATUS;
elf_emit(cinfo, &nhdr, sizeof(nhdr));
elf_emit(cinfo, name, sizeof(name));
status.pr_pid = tcb->pid;
for (j = 0; j < nitems(status.pr_regs); j++)
{
if (tcb->xcp.regs == NULL)
if (g_pidhash[i] != NULL)
{
continue;
}
if (g_tcbinfo.reg_off.p[j] == UINT16_MAX)
{
status.pr_regs[j] = 0;
}
else
{
status.pr_regs[j] = *(uintptr_t *)((uint8_t *)tcb->xcp.regs +
g_tcbinfo.reg_off.p[j]);
elf_emit_tcb_note(cinfo, g_pidhash[i]);
}
}
elf_emit(cinfo, &status, sizeof(status));
}
else
{
elf_emit_tcb_note(cinfo, nxsched_get_tcb(cinfo->pid));
}
}
/****************************************************************************
* Name: elf_emit_program_header
* Name: elf_emit_tcb_stack
*
* Description:
* Fill the task stack information from tcb
*
****************************************************************************/
static void elf_emit_tcb_stack(FAR struct elf_dumpinfo_s *cinfo,
FAR struct tcb_s *tcb)
{
FAR void *buf;
size_t len;
if (running_task() != tcb)
{
len = ((uintptr_t)tcb->stack_base_ptr + tcb->adj_stack_size) -
up_getusrsp(tcb->xcp.regs);
buf = (FAR void *)up_getusrsp(tcb->xcp.regs);
}
else
{
buf = (FAR void *)tcb->stack_alloc_ptr;
len = tcb->adj_stack_size +
(tcb->stack_base_ptr - tcb->stack_alloc_ptr);
}
elf_emit(cinfo, buf, len);
/* Align to page */
elf_emit_align(cinfo);
}
/****************************************************************************
* Name: elf_emit_stack
*
* Description:
* Fill the task stack information
*
****************************************************************************/
static void elf_emit_stack(FAR struct elf_dumpinfo_s *cinfo)
{
int i;
if (cinfo->pid == INVALID_PROCESS_ID)
{
for (i = 0; i < g_npidhash; i++)
{
if (g_pidhash[i] != NULL)
{
elf_emit_tcb_stack(cinfo, g_pidhash[i]);
}
}
}
else
{
elf_emit_tcb_stack(cinfo, nxsched_get_tcb(cinfo->pid));
}
}
/****************************************************************************
* Name: elf_emit_memory
*
* Description:
* Fill the note segment information
*
****************************************************************************/
static void elf_emit_memory(FAR struct elf_dumpinfo_s *cinfo, int memsegs)
{
int i;
for (i = 0; i < memsegs; i++)
{
elf_emit(cinfo, (FAR void *)cinfo->regions[i].start,
cinfo->regions[i].end -
cinfo->regions[i].start);
/* Align to page */
elf_emit_align(cinfo);
}
}
/****************************************************************************
* Name: elf_emit_tcb_phdr
*
* Description:
* Fill the program segment header from tcb
*
****************************************************************************/
static void elf_emit_tcb_phdr(FAR struct elf_dumpinfo_s *cinfo,
FAR struct tcb_s *tcb,
FAR Elf_Phdr *phdr, off_t *offset)
{
if (running_task() != tcb)
{
phdr->p_filesz = (uintptr_t)(tcb->stack_base_ptr +
tcb->adj_stack_size) - up_getusrsp(tcb->xcp.regs);
phdr->p_vaddr = up_getusrsp(tcb->xcp.regs);
}
else
{
phdr->p_vaddr = (uintptr_t)tcb->stack_alloc_ptr;
phdr->p_filesz = tcb->adj_stack_size +
(tcb->stack_base_ptr - tcb->stack_alloc_ptr);
}
phdr->p_type = PT_LOAD;
phdr->p_offset = ROUNDUP(*offset, ELF_PAGESIZE);
phdr->p_paddr = phdr->p_vaddr;
phdr->p_memsz = phdr->p_filesz;
phdr->p_flags = PF_X | PF_W | PF_R;
phdr->p_align = ELF_PAGESIZE;
*offset += ROUNDUP(phdr->p_memsz, ELF_PAGESIZE);
elf_emit(cinfo, phdr, sizeof(*phdr));
}
/****************************************************************************
* Name: elf_emit_phdr
*
* Description:
* Fill the program segment header
*
****************************************************************************/
static void elf_emit_program_header(FAR struct elf_dumpinfo_s *cinfo,
int segs)
static void elf_emit_phdr(FAR struct elf_dumpinfo_s *cinfo,
int stksegs, int memsegs)
{
off_t offset = cinfo->stream->nput + (segs + 1) * sizeof(Elf_Phdr);
off_t offset = cinfo->stream->nput +
(stksegs + memsegs + 1) * sizeof(Elf_Phdr);
Elf_Phdr phdr;
int i;
@ -285,19 +466,35 @@ static void elf_emit_program_header(FAR struct elf_dumpinfo_s *cinfo,
phdr.p_type = PT_NOTE;
phdr.p_offset = offset;
phdr.p_filesz = elf_get_note_size();
phdr.p_filesz = elf_get_note_size(stksegs);
offset += phdr.p_filesz;
elf_emit(cinfo, &phdr, sizeof(phdr));
if (cinfo->pid == INVALID_PROCESS_ID)
{
for (i = 0; i < g_npidhash; i++)
{
if (g_pidhash[i] != NULL)
{
elf_emit_tcb_phdr(cinfo, g_pidhash[i], &phdr, &offset);
}
}
}
else
{
elf_emit_tcb_phdr(cinfo, nxsched_get_tcb(cinfo->pid),
&phdr, &offset);
}
/* Write program headers for segments dump */
for (i = 0; i < segs; i++)
for (i = 0; i < memsegs; i++)
{
phdr.p_type = PT_LOAD;
phdr.p_offset = ROUNDUP(offset, ELF_PAGESIZE);
phdr.p_vaddr = cinfo->regions[i].start;
phdr.p_paddr = cinfo->regions[i].start;
phdr.p_paddr = phdr.p_vaddr;
phdr.p_filesz = cinfo->regions[i].end - cinfo->regions[i].start;
phdr.p_memsz = phdr.p_filesz;
phdr.p_flags = cinfo->regions[i].flags;
@ -327,54 +524,69 @@ static void elf_emit_program_header(FAR struct elf_dumpinfo_s *cinfo,
int elf_coredump(FAR struct elf_dumpinfo_s *cinfo)
{
int segs = 0;
int i;
irqstate_t flags;
int memsegs = 0;
int stksegs;
flags = enter_critical_section();
if (cinfo->pid != INVALID_PROCESS_ID)
{
if (nxsched_get_tcb(cinfo->pid) == NULL)
{
leave_critical_section(flags);
return -EINVAL;
}
stksegs = 1;
}
else
{
stksegs = elf_get_ntcb();
}
/* Check the memory region */
if (cinfo->regions)
if (cinfo->regions != NULL)
{
for (; cinfo->regions[segs].start <
cinfo->regions[segs].end; segs++);
}
if (segs == 0)
{
return -EINVAL;
for (; cinfo->regions[memsegs].start <
cinfo->regions[memsegs].end; memsegs++);
}
/* Fill notes section */
elf_emit_header(cinfo, segs + 1);
elf_emit_hdr(cinfo, stksegs + memsegs + 1);
/* Fill all the program information about the process for the
* notes. This also sets up the file header.
*/
elf_emit_program_header(cinfo, segs);
elf_emit_phdr(cinfo, stksegs, memsegs);
/* Fill note information */
elf_emit_note_info(cinfo);
elf_emit_note(cinfo);
/* Align to page */
elf_emit_align(cinfo);
/* Start dump the memory */
/* Dump stack */
for (i = 0; i < segs; i++)
elf_emit_stack(cinfo);
/* Dump memory segments */
if (memsegs > 0)
{
elf_emit(cinfo, (FAR void *)cinfo->regions[i].start,
cinfo->regions[i].end -
cinfo->regions[i].start);
/* Align to page */
elf_emit_align(cinfo);
elf_emit_memory(cinfo, memsegs);
}
/* Flush the dump */
return elf_flush(cinfo);
elf_flush(cinfo);
leave_critical_section(flags);
return OK;
}

6
include/nuttx/binfmt/binfmt.h
View File

@ -139,7 +139,8 @@ struct binfmt_s
/* Unload module callback */
CODE int (*coredump)(FAR struct memory_region_s *regions,
FAR struct lib_outstream_s *stream);
FAR struct lib_outstream_s *stream,
pid_t pid);
};
/****************************************************************************
@ -209,7 +210,8 @@ int unregister_binfmt(FAR struct binfmt_s *binfmt);
****************************************************************************/
int core_dump(FAR struct memory_region_s *regions,
FAR struct lib_outstream_s *stream);
FAR struct lib_outstream_s *stream,
pid_t pid);
/****************************************************************************
* Name: load_module

1
include/nuttx/binfmt/elf.h
View File

@ -141,6 +141,7 @@ struct elf_dumpinfo_s
{
FAR struct memory_region_s *regions;
FAR struct lib_outstream_s *stream;
pid_t pid;
};
#endif