Displaying 15 results from an estimated 15 matches for "new_cod".
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new_code
2018 May 23
0
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...trace.c
index 01ebcb6f263e..73b3c30cb7a3 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -102,7 +102,7 @@ static const unsigned char *ftrace_nop_replace(void)
static int
ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
- unsigned const char *new_code)
+ unsigned const char *new_code)
{
unsigned char replaced[MCOUNT_INSN_SIZE];
@@ -135,6 +135,44 @@ ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
return 0;
}
+/* Bytes before call GOT offset */
+const unsigned char got_call_preinsn[] = { 0xff, 0x15 };
+
+s...
2018 Mar 13
0
[PATCH v2 21/27] x86/ftrace: Adapt function tracing for PIE support
...trace.c
index 01ebcb6f263e..21bde498f1a9 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -102,7 +102,7 @@ static const unsigned char *ftrace_nop_replace(void)
static int
ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
- unsigned const char *new_code)
+ unsigned const char *new_code)
{
unsigned char replaced[MCOUNT_INSN_SIZE];
@@ -135,6 +135,44 @@ ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
return 0;
}
+/* Bytes before call GOT offset */
+const unsigned char got_call_preinsn[] = { 0xff, 0x15 };
+
+s...
2006 Jun 21
3
png() or jpeg() in a php script
Hello,
I've got a problem with a PHP script, in which I call the system function
(to call another processes). The call is :
system("R --slave --vanilla < path/to/source/source.R");
if in this R file, I've got the lines:
pdf(file="/path/to/file/file.pdf")
commands
dev.off()
the pdf file is perfectly created
but if I change the lines to:
2018 May 24
2
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...ed const char *old_code,
> return 0;
> }
>
> +/* Bytes before call GOT offset */
> +const unsigned char got_call_preinsn[] = { 0xff, 0x15 };
> +
> +static int
> +ftrace_modify_initial_code(unsigned long ip, unsigned const char *old_code,
> + unsigned const char *new_code)
> +{
> + unsigned char replaced[MCOUNT_INSN_SIZE + 1];
> +
> + ftrace_expected = old_code;
> +
> + /*
> + * If PIE is not enabled or no GOT call was found, default to the
> + * original approach to code modification.
> + */
> + if (!IS_ENABLED(CONFIG_X86_PIE) ||
&...
2018 May 24
2
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...ed const char *old_code,
> return 0;
> }
>
> +/* Bytes before call GOT offset */
> +const unsigned char got_call_preinsn[] = { 0xff, 0x15 };
> +
> +static int
> +ftrace_modify_initial_code(unsigned long ip, unsigned const char *old_code,
> + unsigned const char *new_code)
> +{
> + unsigned char replaced[MCOUNT_INSN_SIZE + 1];
> +
> + ftrace_expected = old_code;
> +
> + /*
> + * If PIE is not enabled or no GOT call was found, default to the
> + * original approach to code modification.
> + */
> + if (!IS_ENABLED(CONFIG_X86_PIE) ||
&...
2018 May 24
1
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...Bytes before call GOT offset */
> > > +const unsigned char got_call_preinsn[] = { 0xff, 0x15 };
> > > +
> > > +static int
> > > +ftrace_modify_initial_code(unsigned long ip, unsigned const char
*old_code,
> > > + unsigned const char *new_code)
> > > +{
> > > + unsigned char replaced[MCOUNT_INSN_SIZE + 1];
> > > +
> > > + ftrace_expected = old_code;
> > > +
> > > + /*
> > > + * If PIE is not enabled or no GOT call was found, default to the
> > > + * orig...
2017 Oct 04
1
[RFC v3 20/27] x86/ftrace: Adapt function tracing for PIE support
...race_nop_replace(void)
+static const unsigned char *ftrace_nop_replace(unsigned int size)
{
- return ideal_nops[NOP_ATOMIC5];
+ return ideal_nops[size == 5 ? NOP_ATOMIC5 : size];
}
static int
-ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
- unsigned const char *new_code)
+ftrace_modify_code_direct(struct dyn_ftrace *rec, unsigned const char *old_code,
+ unsigned const char *new_code)
{
unsigned char replaced[MCOUNT_INSN_SIZE];
+ unsigned long ip = rec->ip;
+ unsigned int size = MCOUNT_INSN_SIZE;
ftrace_expected = old_code;
@@ -116,17 +161,17 @@ ft...
2018 May 24
0
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...;
> > }
> >
> > +/* Bytes before call GOT offset */
> > +const unsigned char got_call_preinsn[] = { 0xff, 0x15 };
> > +
> > +static int
> > +ftrace_modify_initial_code(unsigned long ip, unsigned const char *old_code,
> > + unsigned const char *new_code)
> > +{
> > + unsigned char replaced[MCOUNT_INSN_SIZE + 1];
> > +
> > + ftrace_expected = old_code;
> > +
> > + /*
> > + * If PIE is not enabled or no GOT call was found, default to the
> > + * original approach to code modification.
> > + *...
2018 May 23
33
[PATCH v3 00/27] x86: PIE support and option to extend KASLR randomization
Changes:
- patch v3:
- Update on message to describe longer term PIE goal.
- Minor change on ftrace if condition.
- Changed code using xchgq.
- patch v2:
- Adapt patch to work post KPTI and compiler changes
- Redo all performance testing with latest configs and compilers
- Simplify mov macro on PIE (MOVABS now)
- Reduce GOT footprint
- patch v1:
- Simplify ftrace
2018 Mar 13
32
[PATCH v2 00/27] x86: PIE support and option to extend KASLR randomization
Changes:
- patch v2:
- Adapt patch to work post KPTI and compiler changes
- Redo all performance testing with latest configs and compilers
- Simplify mov macro on PIE (MOVABS now)
- Reduce GOT footprint
- patch v1:
- Simplify ftrace implementation.
- Use gcc mstack-protector-guard-reg=%gs with PIE when possible.
- rfc v3:
- Use --emit-relocs instead of -pie to reduce
2018 Mar 13
32
[PATCH v2 00/27] x86: PIE support and option to extend KASLR randomization
Changes:
- patch v2:
- Adapt patch to work post KPTI and compiler changes
- Redo all performance testing with latest configs and compilers
- Simplify mov macro on PIE (MOVABS now)
- Reduce GOT footprint
- patch v1:
- Simplify ftrace implementation.
- Use gcc mstack-protector-guard-reg=%gs with PIE when possible.
- rfc v3:
- Use --emit-relocs instead of -pie to reduce
2017 Oct 04
28
x86: PIE support and option to extend KASLR randomization
These patches make the changes necessary to build the kernel as Position
Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below
the top 2G of the virtual address space. It allows to optionally extend the
KASLR randomization range from 1G to 3G.
Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler
changes, PIE support and KASLR in general. Thanks to
2017 Oct 04
28
x86: PIE support and option to extend KASLR randomization
These patches make the changes necessary to build the kernel as Position
Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below
the top 2G of the virtual address space. It allows to optionally extend the
KASLR randomization range from 1G to 3G.
Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler
changes, PIE support and KASLR in general. Thanks to
2017 Oct 11
32
[PATCH v1 00/27] x86: PIE support and option to extend KASLR randomization
Changes:
- patch v1:
- Simplify ftrace implementation.
- Use gcc mstack-protector-guard-reg=%gs with PIE when possible.
- rfc v3:
- Use --emit-relocs instead of -pie to reduce dynamic relocation space on
mapped memory. It also simplifies the relocation process.
- Move the start the module section next to the kernel. Remove the need for
-mcmodel=large on modules. Extends
2017 Oct 11
32
[PATCH v1 00/27] x86: PIE support and option to extend KASLR randomization
Changes:
- patch v1:
- Simplify ftrace implementation.
- Use gcc mstack-protector-guard-reg=%gs with PIE when possible.
- rfc v3:
- Use --emit-relocs instead of -pie to reduce dynamic relocation space on
mapped memory. It also simplifies the relocation process.
- Move the start the module section next to the kernel. Remove the need for
-mcmodel=large on modules. Extends