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56 lines
1.5 KiB
Diff
56 lines
1.5 KiB
Diff
From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 30 Jan 2016 19:19:08 +0100
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Subject: [PATCH] ldso: fix GDB dynamic linker info on MIPS
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GDB is looking for a pointer to the ldso debug info in the data of the
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.rld_map section.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/arch/mips/reloc.h
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+++ b/arch/mips/reloc.h
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@@ -24,7 +24,7 @@
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#define REL_TPOFF R_MIPS_TLS_TPREL32
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#define NEED_MIPS_GOT_RELOCS 1
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-#define DYNAMIC_IS_RO 1
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+#define DT_DEBUG_INDIRECT DT_MIPS_RLD_MAP
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#define ARCH_SYM_REJECT_UND(s) (!((s)->st_other & STO_MIPS_PLT))
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#define CRTJMP(pc,sp) __asm__ __volatile__( \
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--- a/ldso/dynlink.c
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+++ b/ldso/dynlink.c
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@@ -1582,11 +1582,14 @@ _Noreturn void __dls3(size_t *sp)
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load_deps(&app);
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make_global(&app);
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-#ifndef DYNAMIC_IS_RO
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- for (i=0; app.dynv[i]; i+=2)
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- if (app.dynv[i]==DT_DEBUG)
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+ for (i=0; app.dynv[i]; i+=2) {
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+ if (!DT_DEBUG_INDIRECT && app.dynv[i]==DT_DEBUG)
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app.dynv[i+1] = (size_t)&debug;
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-#endif
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+ if (DT_DEBUG_INDIRECT && app.dynv[i]==DT_DEBUG_INDIRECT) {
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+ size_t *ptr = (size_t *) app.dynv[i+1];
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+ *ptr = (size_t)&debug;
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+ }
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+ }
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/* The main program must be relocated LAST since it may contin
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* copy relocations which depend on libraries' relocations. */
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--- a/src/internal/dynlink.h
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+++ b/src/internal/dynlink.h
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@@ -83,6 +83,10 @@ struct fdpic_dummy_loadmap {
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#define NEED_MIPS_GOT_RELOCS 0
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#endif
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+#ifndef DT_DEBUG_INDIRECT
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+#define DT_DEBUG_INDIRECT 0
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+#endif
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+
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#define AUX_CNT 32
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#define DYN_CNT 32
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