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Differential D26114 Diff 76068 lib/libpmcstat/libpmcstat_image.c

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lib/libpmcstat/libpmcstat_image.c

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#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include <sys/types.h> #include <sys/types.h>
#include <sys/cpuset.h> #include <sys/cpuset.h>
#include <sys/param.h> #include <sys/param.h>
#include <sys/endian.h> #include <sys/endian.h>
#include <sys/pmc.h> #include <sys/pmc.h>
#include <sys/sysctl.h>
#include <sys/imgact_aout.h> #include <sys/imgact_aout.h>
#include <sys/imgact_elf.h> #include <sys/imgact_elf.h>
#include <netinet/in.h> #include <netinet/in.h>
#include <assert.h> #include <assert.h>
#include <err.h> #include <err.h>
#include <fcntl.h> #include <fcntl.h>
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*/ */
void void
pmcstat_image_link(struct pmcstat_process *pp, struct pmcstat_image *image, pmcstat_image_link(struct pmcstat_process *pp, struct pmcstat_image *image,
uintfptr_t start) uintfptr_t start)
{ {
struct pmcstat_pcmap *pcm, *pcmnew; struct pmcstat_pcmap *pcm, *pcmnew;
uintfptr_t offset; uintfptr_t offset;
#ifdef __powerpc__
jhibbitsUnsubmitted
Done
Inline Actions

This probably affects all powerpc platforms, not just powerpc64. They're all ET_DYN, and I know on Book-E 32-bit does get relocated.

jhibbits: This probably affects all powerpc platforms, not just powerpc64. They're all ET_DYN, and I…
unsigned long kernbase;
size_t kernbase_len;
#endif
assert(image->pi_type != PMCSTAT_IMAGE_UNKNOWN && assert(image->pi_type != PMCSTAT_IMAGE_UNKNOWN &&
image->pi_type != PMCSTAT_IMAGE_INDETERMINABLE); image->pi_type != PMCSTAT_IMAGE_INDETERMINABLE);
if ((pcmnew = malloc(sizeof(*pcmnew))) == NULL) if ((pcmnew = malloc(sizeof(*pcmnew))) == NULL)
err(EX_OSERR, "ERROR: Cannot create a map entry"); err(EX_OSERR, "ERROR: Cannot create a map entry");
/*
* PowerPC kernel is of DYN type and it has a base address
* where it is initially loaded, before being relocated.
* As the address in 'start' is where the kernel was relocated to,
* but the symbols always use the original base address, we need to
* subtract it to get the correct offset.
*/
#ifdef __powerpc__
jhibbitsUnsubmitted
Done
Inline Actions

Same down here.

jhibbits: Same down here.
if (pp->pp_pid == -1) {
kernbase = 0;
kernbase_len = sizeof(kernbase);
if (sysctlbyname("kern.base_address", &kernbase, &kernbase_len,
NULL, 0) == -1)
warnx(
"WARNING: Could not retrieve kernel base address");
else
start -= kernbase;
}
#endif
/* /*
* Adjust the map entry to only cover the text portion * Adjust the map entry to only cover the text portion
* of the object. * of the object.
*/ */
offset = start - image->pi_vaddr; offset = start - image->pi_vaddr;
pcmnew->ppm_lowpc = image->pi_start + offset; pcmnew->ppm_lowpc = image->pi_start + offset;
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