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author | Mystery Man <unknown@mandriva.org> | 2003-08-20 07:37:27 +0000 |
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committer | Mystery Man <unknown@mandriva.org> | 2003-08-20 07:37:27 +0000 |
commit | 7f2ac73888b8ef372ea597049981b27e7d810ac2 (patch) | |
tree | 354132889b63bbe5f446cb82869b3c3367135a80 /mdk-stage1/dietlibc/profiling/PORTING | |
parent | 327bd24f8e4291bd1882de1990dd7339f781a9cb (diff) | |
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This commit was manufactured by cvs2svn to create branch 'MDKC_1_0'.topic/MDKC_1_0
Diffstat (limited to 'mdk-stage1/dietlibc/profiling/PORTING')
-rw-r--r-- | mdk-stage1/dietlibc/profiling/PORTING | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/profiling/PORTING b/mdk-stage1/dietlibc/profiling/PORTING new file mode 100644 index 000000000..c3fc5eba7 --- /dev/null +++ b/mdk-stage1/dietlibc/profiling/PORTING @@ -0,0 +1,25 @@ + Porting to other platforms + + ... is easy. Just create an mcount.S in the $ARCH + directory (eg. dietlibc/i386) which includes a + function (called "mcount") that: + + 1.) saves ALL registers that are freely usable + and which might be used by __mcount(). + 2.) loads the instruction pointer (PC) from the + function that called mcount, and the function + which called the function, that called mcount + into the first two argument registers (or push + them on the stack - depending on the processor- + architecture). + 3.) call __mcount. + 4.) restore the registers saved in 1) + + Then You need a macro called PC in <asm/sigcontext.h> + which extracts the (instruction pointer / program + counter) from a sigcontext structure (eg. on i386 this + would be ctx.eip). + + $ARCH/start.S must also be modified to call monitor + with the offset of .text and _etext as parameters. + |