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libsysdecode: decode PROT_MAX flags

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Extend libsysdecode to pretty-print PROT_MAX flags and fix decoding of regular protection flags broken since r349240.

before:
truss:
mmap(0x0,40960,0x30000,MAP_PRIVATE|MAP_ANON|MAP_NOCORE,-1,0x0) = 34366234624 (0x800632000)
kdump:
11439 protmax  CALL  mmap(0,0xa000,0x30000<><invalid>196608,0x21002<MAP_PRIVATE|MAP_ANON|MAP_NOCORE>,0xffffffff,0)

after:
truss:
mmap(0x0,40960,PROT_MAX(PROT_READ|PROT_WRITE)|PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON|MAP_NOCORE,-1,0x0) = 34366234624 (0x800632000)
kdump:
11439 protmax  CALL  mmap(0,0xa000,0x30000<PROT_MAX(PROT_READ|PROT_WRITE)|PROT_READ|PROT_WRITE>,0x21002<MAP_PRIVATE|MAP_ANON|MAP_NOCORE>,0xffffffff,0)

Reviewed by:	kib (mentor)
Approved by:	kib (mentor)
Differential Revision:	https://reviews.freebsd.org/D21706
This commit is contained in:
Pawel Biernacki 2019-09-30 19:03:43 +00:00
parent 052ad61b7e
commit c1dd36cfca
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=352913
1 changed files with 11 additions and 1 deletions
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12
lib/libsysdecode/flags.c
View File

@ -657,8 +657,18 @@ sysdecode_mlockall_flags(FILE *fp, int flags, int *rem)
bool
sysdecode_mmap_prot(FILE *fp, int prot, int *rem)
{
int protm;
bool printed;
return (print_mask_int(fp, mmapprot, prot, rem));
printed = false;
protm = PROT_MAX_EXTRACT(prot);
if (protm != 0) {
fputs("PROT_MAX(", fp);
printed = print_mask_int(fp, mmapprot, protm, rem);
fputs(")|", fp);
prot = protm;
}
return (print_mask_int(fp, mmapprot, prot, rem) || printed);
}
bool