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* linux-low.c (linux_write_memory): Bail out early if peeking

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memory failed.
This commit is contained in:
Pedro Alves 2010-03-14 19:34:47 +00:00
parent c3adc08c6f
commit 93ae6fdc31
2 changed files with 14 additions and 4 deletions
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5
gdb/gdbserver/ChangeLog
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@ -1,3 +1,8 @@
2010-03-14 Pedro Alves <pedro@codesourcery.com>
* linux-low.c (linux_write_memory): Bail out early if peeking
memory failed.
2010-03-14 Pedro Alves <pedro@codesourcery.com>
* linux-low.h (struct lwp_info): New fields

13
gdb/gdbserver/linux-low.c
View File

@ -2556,9 +2556,8 @@ linux_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
return 0;
}
/* Copy LEN bytes of data from debugger memory at MYADDR
to inferior's memory at MEMADDR.
On failure (cannot write the inferior)
/* Copy LEN bytes of data from debugger memory at MYADDR to inferior's
memory at MEMADDR. On failure (cannot write to the inferior)
returns the value of errno. */
static int
@ -2590,13 +2589,17 @@ linux_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
/* Fill start and end extra bytes of buffer with existing memory data. */
errno = 0;
/* Coerce the 3rd arg to a uintptr_t first to avoid potential gcc warning
about coercing an 8 byte integer to a 4 byte pointer. */
buffer[0] = ptrace (PTRACE_PEEKTEXT, pid,
(PTRACE_ARG3_TYPE) (uintptr_t) addr, 0);
if (errno)
return errno;
if (count > 1)
{
errno = 0;
buffer[count - 1]
= ptrace (PTRACE_PEEKTEXT, pid,
/* Coerce to a uintptr_t first to avoid potential gcc warning
@ -2604,9 +2607,11 @@ linux_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
(PTRACE_ARG3_TYPE) (uintptr_t) (addr + (count - 1)
* sizeof (PTRACE_XFER_TYPE)),
0);
if (errno)
return errno;
}
/* Copy data to be written over corresponding part of buffer */
/* Copy data to be written over corresponding part of buffer. */
memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), myaddr, len);