termux-packages/packages/libelf/0002-Replace-libdwfl-nested...

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2020-06-20 19:05:31 +02:00
From 05d21996ba7b8cb7c8708ad8f7a6678d406e0936 Mon Sep 17 00:00:00 2001
From: Chih-Hung Hsieh <chh@google.com>
Date: Sun, 31 May 2020 14:03:51 +0100
Subject: [PATCH 2/3] Replace libdwfl nested functions with macros, part 1.
Prepare to compile with clang.
---
libdwfl/elf-from-memory.c | 77 +++++++++++++++++++++------------------
1 file changed, 42 insertions(+), 35 deletions(-)
diff --git a/libdwfl/elf-from-memory.c b/libdwfl/elf-from-memory.c
index c54c1b9..143e124 100644
--- a/libdwfl/elf-from-memory.c
+++ b/libdwfl/elf-from-memory.c
@@ -229,29 +229,33 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
segments_end, segments_end_mem and loadbase (if not
found_base yet). Returns true if sanity checking failed,
false otherwise. */
- inline bool handle_segment (GElf_Addr vaddr, GElf_Off offset,
- GElf_Xword filesz, GElf_Xword memsz)
- {
- /* Sanity check the segment load aligns with the pagesize. */
- if (((vaddr - offset) & (pagesize - 1)) != 0)
- return true;
-
- GElf_Off segment_end = ((offset + filesz + pagesize - 1)
- & -pagesize);
-
- if (segment_end > (GElf_Off) contents_size)
- contents_size = segment_end;
-
- if (!found_base && (offset & -pagesize) == 0)
- {
- loadbase = ehdr_vma - (vaddr & -pagesize);
- found_base = true;
- }
-
- segments_end = offset + filesz;
- segments_end_mem = offset + memsz;
- return false;
- }
+ #define handle_segment(_vaddr, _offset, _filesz, _memsz) \
+ ( { \
+ bool result; \
+ GElf_Addr vaddr = _vaddr; \
+ GElf_Off offset = _offset; \
+ GElf_Xword filesz = _filesz; \
+ GElf_Xword memsz = _memsz; \
+ /* Sanity check the segment load aligns with the pagesize. */ \
+ if (((vaddr - offset) & (pagesize - 1)) != 0) \
+ result = true; \
+ else \
+ { \
+ result = false; \
+ GElf_Off segment_end = ((offset + filesz + pagesize - 1) \
+ & -pagesize); \
+ if (segment_end > (GElf_Off) contents_size) \
+ contents_size = segment_end; \
+ if (!found_base && (offset & -pagesize) == 0) \
+ { \
+ loadbase = ehdr_vma - (vaddr & -pagesize); \
+ found_base = true; \
+ } \
+ segments_end = offset + filesz; \
+ segments_end_mem = offset + memsz; \
+ } \
+ result; \
+ } )
case ELFCLASS32:
if (elf32_xlatetom (&xlateto, &xlatefrom,
@@ -309,18 +313,21 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
{
/* Reads the given segment. Returns true if reading fails,
false otherwise. */
- inline bool handle_segment (GElf_Addr vaddr, GElf_Off offset,
- GElf_Xword filesz)
- {
- GElf_Off start = offset & -pagesize;
- GElf_Off end = (offset + filesz + pagesize - 1) & -pagesize;
- if (end > (GElf_Off) contents_size)
- end = contents_size;
- nread = (*read_memory) (arg, buffer + start,
- (loadbase + vaddr) & -pagesize,
- end - start, end - start);
- return nread <= 0;
- }
+ #undef handle_segment
+ #define handle_segment(_vaddr, _offset, _filesz) \
+ ( { \
+ GElf_Addr vaddr = _vaddr; \
+ GElf_Off offset = _offset; \
+ GElf_Xword filesz = _filesz; \
+ GElf_Off start = offset & -pagesize; \
+ GElf_Off end = (offset + filesz + pagesize - 1) & -pagesize; \
+ if (end > (GElf_Off) contents_size) \
+ end = contents_size; \
+ nread = (*read_memory) (arg, buffer + start, \
+ (loadbase + vaddr) & -pagesize, \
+ end - start, end - start); \
+ (nread <= 0); \
+ } )
case ELFCLASS32:
for (uint_fast16_t i = 0; i < phnum; ++i)
--
2.26.2