scc

commit e2e71bfb86d012abec03e47f20aaae56e0b84bd3
parent f485fa123db6f14395f034c90705edde591e759a
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Tue, 28 Jan 2025 14:50:25 +0100

libmach/elf: Add loadmap()

Diffstat:
M
src/libmach/elf/Makefile
 | 
1
+
A
src/libmach/elf/elfloadmap.c
 | 
42
++++++++++++++++++++++++++++++++++++++++++
M
src/libmach/loadmap.c
 | 
1
+

3 files changed, 44 insertions(+), 0 deletions(-)
diff --git a/src/libmach/elf/Makefile b/src/libmach/elf/Makefile
@@ -8,6 +8,7 @@ OBJS =\
 	elfdel.o\
 	elfgetsec.o\
 	elfgetsym.o\
+	elfloadmap.o\
 	elfnew.o\
 	elfprobe.o\
 	elfread.o\
diff --git a/src/libmach/elf/elfloadmap.c b/src/libmach/elf/elfloadmap.c
@@ -0,0 +1,42 @@
+#include <stdio.h>
+
+#include <scc/mach.h>
+#include <scc/elf.h>
+
+#include "../libmach.h"
+#include "fun.h"
+
+Map *
+elfloadmap(Obj *obj, FILE *fp)
+{
+	long i;
+	Map *map;
+	char *name;
+	long nsec;
+	FILE *src;
+	Elfsec *shdr;
+	Elf *elf = obj->data;
+	Elfhdr *hdr = &elf->hdr;
+
+	nsec = hdr->shnum;
+	if ((map = newmap(NULL, nsec)) == NULL)
+		return NULL;
+
+	for (shdr = elf->secs; nsec--; ++shdr) {
+		unsigned long o;
+		unsigned long long b = shdr->addralign;
+		unsigned long long e = b + shdr->size;
+
+		if (shdr->offset != 0) {
+			o = obj->pos + shdr->offset;
+			src = fp;
+		} else {
+			o = 0;
+			src = NULL;
+		}
+
+		setmap(map, name, src, b, e, o);
+	}
+
+	return map;
+}
diff --git a/src/libmach/loadmap.c b/src/libmach/loadmap.c
@@ -9,6 +9,7 @@
 
 static Map *(*ops[NFORMATS])(Obj *, FILE *) = {
 	[COFF32] = coff32loadmap,
+	[ELF] = elfloadmap,
 };
 
 Map *