From: Timm Bäder <[email protected]>
Signed-off-by: Timm Bäder <[email protected]>
---
libdwfl/dwfl_segment_report_module.c | 77 +++++++++++++++++-----------
1 file changed, 47 insertions(+), 30 deletions(-)
diff --git a/libdwfl/dwfl_segment_report_module.c
b/libdwfl/dwfl_segment_report_module.c
index c55168ed..01adfe9e 100644
--- a/libdwfl/dwfl_segment_report_module.c
+++ b/libdwfl/dwfl_segment_report_module.c
@@ -242,6 +242,39 @@ finish_portion (Dwfl *dwfl,
(*memory_callback) (dwfl, -1, data, data_size, 0, 0, memory_callback_arg);
}
+
+static inline bool
+read_portion (Dwfl *dwfl,
+ Dwfl_Memory_Callback *memory_callback,
+ void *memory_callback_arg,
+ void **data, size_t *data_size,
+ GElf_Addr vaddr, size_t filesz,
+ void *buffer,
+ size_t buffer_available,
+ GElf_Addr start,
+ size_t segment)
+{
+ /* Check whether we will have to read the segment data, or if it
+ can be returned from the existing buffer. */
+ if (filesz > buffer_available
+ || vaddr - start > buffer_available - filesz
+ /* If we're in string mode, then don't consider the buffer we have
+ sufficient unless it contains the terminator of the string. */
+ || (filesz == 0 && memchr (vaddr - start + buffer, '\0',
+ buffer_available - (vaddr - start)) == NULL))
+ {
+ *data = NULL;
+ *data_size = filesz;
+ return ! (*memory_callback) (dwfl, addr_segndx (dwfl, segment, vaddr,
false),
+ data, data_size, vaddr, filesz,
memory_callback_arg);
+ }
+
+ /* We already have this whole note segment from our initial read. */
+ *data = vaddr - start + buffer;
+ *data_size = 0;
+ return false;
+}
+
int
dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
Dwfl_Memory_Callback *memory_callback,
@@ -283,30 +316,6 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const
char *name,
|| memcmp (buffer, ELFMAG, SELFMAG) != 0)
goto out;
- inline bool read_portion (void **data, size_t *data_size,
- GElf_Addr vaddr, size_t filesz)
- {
- /* Check whether we will have to read the segment data, or if it
- can be returned from the existing buffer. */
- if (filesz > buffer_available
- || vaddr - start > buffer_available - filesz
- /* If we're in string mode, then don't consider the buffer we have
- sufficient unless it contains the terminator of the string. */
- || (filesz == 0 && memchr (vaddr - start + buffer, '\0',
- buffer_available - (vaddr - start)) == NULL))
- {
- *data = NULL;
- *data_size = filesz;
- return ! (*memory_callback) (dwfl, addr_segndx (dwfl, segment, vaddr,
false),
- data, data_size, vaddr, filesz,
memory_callback_arg);
- }
-
- /* We already have this whole note segment from our initial read. */
- *data = vaddr - start + buffer;
- *data_size = 0;
- return false;
- }
-
/* Extract the information we need from the file header. */
const unsigned char *e_ident;
unsigned char ei_class;
@@ -387,8 +396,10 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const
char *name,
void *ph_buffer = NULL;
size_t ph_buffer_size = 0;
- if (read_portion (&ph_buffer, &ph_buffer_size,
- start + phoff, xlatefrom.d_size))
+ if (read_portion (dwfl, memory_callback, memory_callback_arg,
+ &ph_buffer, &ph_buffer_size,
+ start + phoff, xlatefrom.d_size,
+ buffer, buffer_available, start, segment))
goto out;
/* ph_buffer_size will be zero if we got everything from the initial
@@ -445,7 +456,9 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char
*name,
void *data;
size_t data_size;
- if (read_portion (&data, &data_size, vaddr, filesz))
+ if (read_portion (dwfl, memory_callback, memory_callback_arg,
+ &data, &data_size, vaddr, filesz,
+ buffer, buffer_available, start, segment))
return;
/* data_size will be zero if we got everything from the initial
@@ -766,7 +779,9 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char
*name,
void *dyn_data = NULL;
size_t dyn_data_size = 0;
if (dyn_filesz != 0 && dyn_filesz % dyn_entsize == 0
- && ! read_portion (&dyn_data, &dyn_data_size, dyn_vaddr, dyn_filesz))
+ && ! read_portion (dwfl, memory_callback, memory_callback_arg,
+ &dyn_data, &dyn_data_size, dyn_vaddr, dyn_filesz,
+ buffer, buffer_available, start, segment))
{
/* dyn_data_size will be zero if we got everything from the initial
buffer, otherwise it will be the size of the new buffer that
@@ -834,8 +849,10 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const
char *name,
/* Try to get the DT_SONAME string. */
if (soname_stroff != 0 && soname_stroff + 1 < dynstrsz
- && ! read_portion (&soname, &soname_size,
- dynstr_vaddr + soname_stroff, 0))
+ && ! read_portion (dwfl, memory_callback, memory_callback_arg,
+ &soname, &soname_size,
+ dynstr_vaddr + soname_stroff, 0,
+ buffer, buffer_available, start, segment))
name = soname;
}
--
2.26.2
