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[PATCH v4] gdbserver: uclinux: pull in ptrace offset definitions from asm/ptrace.h
- From: Will Deacon <will dot deacon at arm dot com>
- To: gdb-patches at sourceware dot org
- Cc: vapier at gentoo dot org, palves at redhat dot com, Will Deacon <will dot deacon at arm dot com>
- Date: Fri, 27 Apr 2012 11:51:26 +0100
- Subject: [PATCH v4] gdbserver: uclinux: pull in ptrace offset definitions from asm/ptrace.h
When debugging a uclinux target, it is necessary to retrieve the text
and data offsets of the running program in order for symbol resolution
to work correctly.
This patch pulls in definitions for PT_{TEXT,DATA,TEXT_END}_ADDR from
the kernel's exported ptrace header, which can be issued as `magic'
addresses to the PTRACE_PEEKUSER request in order to retrieve the child
offsets. For those architectures currently providing their own inline
definitions, the existing code is used as a fallback if the header
doesn't provide any overrides.
---
2012-04-26 Will Deacon <will.deacon@arm.com>
* linux-low.c [__UCLIBC__ && !(__UCLIBC_HAS_MMU__ || __ARCH_HAS_MMU__)]:
Include asm/ptrace.h.
(PT_TEXT_ADDR, PT_DATA_ADDR, PT_TEXT_END_ADDR): Define only if not
already defined.
gdb/gdbserver/linux-low.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index bbb0693..f8d0c99 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -78,6 +78,8 @@
#ifdef __UCLIBC__
#if !(defined(__UCLIBC_HAS_MMU__) || defined(__ARCH_HAS_MMU__))
+/* PTRACE_TEXT_ADDR and friends. */
+#include <asm/ptrace.h>
#define HAS_NOMMU
#endif
#endif
@@ -4759,6 +4761,9 @@ linux_stopped_data_address (void)
}
#if defined(__UCLIBC__) && defined(HAS_NOMMU)
+#if ! (defined(PT_TEXT_ADDR) \
+ || defined(PT_DATA_ADDR) \
+ || defined(PT_TEXT_END_ADDR))
#if defined(__mcoldfire__)
/* These should really be defined in the kernel's ptrace.h header. */
#define PT_TEXT_ADDR 49*4
@@ -4773,6 +4778,7 @@ linux_stopped_data_address (void)
#define PT_DATA_ADDR (0x10004*4)
#define PT_TEXT_END_ADDR (0x10008*4)
#endif
+#endif
/* Under uClinux, programs are loaded at non-zero offsets, which we need
to tell gdb about. */
--
1.7.4.1