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author | Markus Metzger <markus.t.metzger@intel.com> | 2008-01-30 12:32:03 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 12:32:03 (GMT) |
commit | cba4b65d359268c40679ca75ac92c0b93cecf6de (patch) | |
tree | 95352d42a1a51338b08b88603cd4678297d56917 /include/asm-x86/ptrace-abi.h | |
parent | e6ae5d9540727b0e2e5e2fbeb683c84671ed0a31 (diff) | |
download | linux-fsl-qoriq-cba4b65d359268c40679ca75ac92c0b93cecf6de.tar.xz |
x86, ptrace: add buffer size checks
Pass the buffer size for (most) ptrace commands that pass user-allocated buffers and check that size before accessing the buffer. Unfortunately, PTRACE_BTS_GET already uses all 4 parameters.
Commands that access user buffers return the number of bytes or records read or written.
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/ptrace-abi.h')
-rw-r--r-- | include/asm-x86/ptrace-abi.h | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/include/asm-x86/ptrace-abi.h b/include/asm-x86/ptrace-abi.h index 32fe137..bcf6704 100644 --- a/include/asm-x86/ptrace-abi.h +++ b/include/asm-x86/ptrace-abi.h @@ -99,13 +99,15 @@ struct ptrace_bts_config { #define PTRACE_BTS_CONFIG 40 /* Configure branch trace recording. - DATA is ignored, ADDR points to a struct ptrace_bts_config. + ADDR points to a struct ptrace_bts_config. + DATA gives the size of that buffer. A new buffer is allocated, iff the size changes. + Returns the number of bytes read. */ #define PTRACE_BTS_STATUS 41 -/* Return the current configuration. - DATA is ignored, ADDR points to a struct ptrace_bts_config - that will contain the result. +/* Return the current configuration in a struct ptrace_bts_config + pointed to by ADDR; DATA gives the size of that buffer. + Returns the number of bytes written. */ #define PTRACE_BTS_SIZE 42 /* Return the number of available BTS records. @@ -123,8 +125,8 @@ struct ptrace_bts_config { */ #define PTRACE_BTS_DRAIN 45 /* Read all available BTS records and clear the buffer. - DATA is ignored. ADDR points to an array of struct bts_struct of - suitable size. + ADDR points to an array of struct bts_struct. + DATA gives the size of that buffer. BTS records are read from oldest to newest. Returns number of BTS records drained. */ |